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ARM: PL08x: ensure loops use cpu_relax()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ks8842.c
blob928b2b83cef509080c30eccd6c4d1c4cfe76fd58
1 /*
2 * ks8842.c timberdale KS8842 ethernet driver
3 * Copyright (c) 2009 Intel Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* Supports:
20 * The Micrel KS8842 behind the timberdale FPGA
21 * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/platform_device.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/ethtool.h>
32 #include <linux/ks8842.h>
33 #include <linux/dmaengine.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/scatterlist.h>
36
37 #define DRV_NAME "ks8842"
38
39 /* Timberdale specific Registers */
40 #define REG_TIMB_RST 0x1c
41 #define REG_TIMB_FIFO 0x20
42 #define REG_TIMB_ISR 0x24
43 #define REG_TIMB_IER 0x28
44 #define REG_TIMB_IAR 0x2C
45 #define REQ_TIMB_DMA_RESUME 0x30
46
47 /* KS8842 registers */
48
49 #define REG_SELECT_BANK 0x0e
50
51 /* bank 0 registers */
52 #define REG_QRFCR 0x04
53
54 /* bank 2 registers */
55 #define REG_MARL 0x00
56 #define REG_MARM 0x02
57 #define REG_MARH 0x04
58
59 /* bank 3 registers */
60 #define REG_GRR 0x06
61
62 /* bank 16 registers */
63 #define REG_TXCR 0x00
64 #define REG_TXSR 0x02
65 #define REG_RXCR 0x04
66 #define REG_TXMIR 0x08
67 #define REG_RXMIR 0x0A
68
69 /* bank 17 registers */
70 #define REG_TXQCR 0x00
71 #define REG_RXQCR 0x02
72 #define REG_TXFDPR 0x04
73 #define REG_RXFDPR 0x06
74 #define REG_QMU_DATA_LO 0x08
75 #define REG_QMU_DATA_HI 0x0A
76
77 /* bank 18 registers */
78 #define REG_IER 0x00
79 #define IRQ_LINK_CHANGE 0x8000
80 #define IRQ_TX 0x4000
81 #define IRQ_RX 0x2000
82 #define IRQ_RX_OVERRUN 0x0800
83 #define IRQ_TX_STOPPED 0x0200
84 #define IRQ_RX_STOPPED 0x0100
85 #define IRQ_RX_ERROR 0x0080
86 #define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \
87 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR)
88 /* When running via timberdale in DMA mode, the RX interrupt should be
89 enabled in the KS8842, but not in the FPGA IP, since the IP handles
90 RX DMA internally.
91 TX interrupts are not needed it is handled by the FPGA the driver is
92 notified via DMA callbacks.
93 */
94 #define ENABLED_IRQS_DMA_IP (IRQ_LINK_CHANGE | IRQ_RX_STOPPED | \
95 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR)
96 #define ENABLED_IRQS_DMA (ENABLED_IRQS_DMA_IP | IRQ_RX)
97 #define REG_ISR 0x02
98 #define REG_RXSR 0x04
99 #define RXSR_VALID 0x8000
100 #define RXSR_BROADCAST 0x80
101 #define RXSR_MULTICAST 0x40
102 #define RXSR_UNICAST 0x20
103 #define RXSR_FRAMETYPE 0x08
104 #define RXSR_TOO_LONG 0x04
105 #define RXSR_RUNT 0x02
106 #define RXSR_CRC_ERROR 0x01
107 #define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR)
108
109 /* bank 32 registers */
110 #define REG_SW_ID_AND_ENABLE 0x00
111 #define REG_SGCR1 0x02
112 #define REG_SGCR2 0x04
113 #define REG_SGCR3 0x06
114
115 /* bank 39 registers */
116 #define REG_MACAR1 0x00
117 #define REG_MACAR2 0x02
118 #define REG_MACAR3 0x04
119
120 /* bank 45 registers */
121 #define REG_P1MBCR 0x00
122 #define REG_P1MBSR 0x02
123
124 /* bank 46 registers */
125 #define REG_P2MBCR 0x00
126 #define REG_P2MBSR 0x02
127
128 /* bank 48 registers */
129 #define REG_P1CR2 0x02
130
131 /* bank 49 registers */
132 #define REG_P1CR4 0x02
133 #define REG_P1SR 0x04
134
135 /* flags passed by platform_device for configuration */
136 #define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */
137 #define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */
138
139 #define DMA_BUFFER_SIZE 2048
140
141 struct ks8842_tx_dma_ctl {
142 struct dma_chan *chan;
143 struct dma_async_tx_descriptor *adesc;
144 void *buf;
145 struct scatterlist sg;
146 int channel;
147 };
148
149 struct ks8842_rx_dma_ctl {
150 struct dma_chan *chan;
151 struct dma_async_tx_descriptor *adesc;
152 struct sk_buff *skb;
153 struct scatterlist sg;
154 struct tasklet_struct tasklet;
155 int channel;
156 };
157
158 #define KS8842_USE_DMA(adapter) (((adapter)->dma_tx.channel != -1) && \
159 ((adapter)->dma_rx.channel != -1))
160
161 struct ks8842_adapter {
162 void __iomem *hw_addr;
163 int irq;
164 unsigned long conf_flags; /* copy of platform_device config */
165 struct tasklet_struct tasklet;
166 spinlock_t lock; /* spinlock to be interrupt safe */
167 struct work_struct timeout_work;
168 struct net_device *netdev;
169 struct device *dev;
170 struct ks8842_tx_dma_ctl dma_tx;
171 struct ks8842_rx_dma_ctl dma_rx;
172 };
173
174 static void ks8842_dma_rx_cb(void *data);
175 static void ks8842_dma_tx_cb(void *data);
176
177 static inline void ks8842_resume_dma(struct ks8842_adapter *adapter)
178 {
179 iowrite32(1, adapter->hw_addr + REQ_TIMB_DMA_RESUME);
180 }
181
182 static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank)
183 {
184 iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK);
185 }
186
187 static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank,
188 u8 value, int offset)
189 {
190 ks8842_select_bank(adapter, bank);
191 iowrite8(value, adapter->hw_addr + offset);
192 }
193
194 static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank,
195 u16 value, int offset)
196 {
197 ks8842_select_bank(adapter, bank);
198 iowrite16(value, adapter->hw_addr + offset);
199 }
200
201 static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank,
202 u16 bits, int offset)
203 {
204 u16 reg;
205 ks8842_select_bank(adapter, bank);
206 reg = ioread16(adapter->hw_addr + offset);
207 reg |= bits;
208 iowrite16(reg, adapter->hw_addr + offset);
209 }
210
211 static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank,
212 u16 bits, int offset)
213 {
214 u16 reg;
215 ks8842_select_bank(adapter, bank);
216 reg = ioread16(adapter->hw_addr + offset);
217 reg &= ~bits;
218 iowrite16(reg, adapter->hw_addr + offset);
219 }
220
221 static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank,
222 u32 value, int offset)
223 {
224 ks8842_select_bank(adapter, bank);
225 iowrite32(value, adapter->hw_addr + offset);
226 }
227
228 static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank,
229 int offset)
230 {
231 ks8842_select_bank(adapter, bank);
232 return ioread8(adapter->hw_addr + offset);
233 }
234
235 static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank,
236 int offset)
237 {
238 ks8842_select_bank(adapter, bank);
239 return ioread16(adapter->hw_addr + offset);
240 }
241
242 static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank,
243 int offset)
244 {
245 ks8842_select_bank(adapter, bank);
246 return ioread32(adapter->hw_addr + offset);
247 }
248
249 static void ks8842_reset(struct ks8842_adapter *adapter)
250 {
251 if (adapter->conf_flags & MICREL_KS884X) {
252 ks8842_write16(adapter, 3, 1, REG_GRR);
253 msleep(10);
254 iowrite16(0, adapter->hw_addr + REG_GRR);
255 } else {
256 /* The KS8842 goes haywire when doing softare reset
257 * a work around in the timberdale IP is implemented to
258 * do a hardware reset instead
259 ks8842_write16(adapter, 3, 1, REG_GRR);
260 msleep(10);
261 iowrite16(0, adapter->hw_addr + REG_GRR);
262 */
263 iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST);
264 msleep(20);
265 }
266 }
267
268 static void ks8842_update_link_status(struct net_device *netdev,
269 struct ks8842_adapter *adapter)
270 {
271 /* check the status of the link */
272 if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) {
273 netif_carrier_on(netdev);
274 netif_wake_queue(netdev);
275 } else {
276 netif_stop_queue(netdev);
277 netif_carrier_off(netdev);
278 }
279 }
280
281 static void ks8842_enable_tx(struct ks8842_adapter *adapter)
282 {
283 ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR);
284 }
285
286 static void ks8842_disable_tx(struct ks8842_adapter *adapter)
287 {
288 ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR);
289 }
290
291 static void ks8842_enable_rx(struct ks8842_adapter *adapter)
292 {
293 ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR);
294 }
295
296 static void ks8842_disable_rx(struct ks8842_adapter *adapter)
297 {
298 ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR);
299 }
300
301 static void ks8842_reset_hw(struct ks8842_adapter *adapter)
302 {
303 /* reset the HW */
304 ks8842_reset(adapter);
305
306 /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */
307 ks8842_write16(adapter, 16, 0x000E, REG_TXCR);
308
309 /* enable the receiver, uni + multi + broadcast + flow ctrl
310 + crc strip */
311 ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400,
312 REG_RXCR);
313
314 /* TX frame pointer autoincrement */
315 ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR);
316
317 /* RX frame pointer autoincrement */
318 ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR);
319
320 /* RX 2 kb high watermark */
321 ks8842_write16(adapter, 0, 0x1000, REG_QRFCR);
322
323 /* aggresive back off in half duplex */
324 ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1);
325
326 /* enable no excessive collison drop */
327 ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2);
328
329 /* Enable port 1 force flow control / back pressure / transmit / recv */
330 ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2);
331
332 /* restart port auto-negotiation */
333 ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4);
334
335 /* Enable the transmitter */
336 ks8842_enable_tx(adapter);
337
338 /* Enable the receiver */
339 ks8842_enable_rx(adapter);
340
341 /* clear all interrupts */
342 ks8842_write16(adapter, 18, 0xffff, REG_ISR);
343
344 /* enable interrupts */
345 if (KS8842_USE_DMA(adapter)) {
346 /* When running in DMA Mode the RX interrupt is not enabled in
347 timberdale because RX data is received by DMA callbacks
348 it must still be enabled in the KS8842 because it indicates
349 to timberdale when there is RX data for it's DMA FIFOs */
350 iowrite16(ENABLED_IRQS_DMA_IP, adapter->hw_addr + REG_TIMB_IER);
351 ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER);
352 } else {
353 if (!(adapter->conf_flags & MICREL_KS884X))
354 iowrite16(ENABLED_IRQS,
355 adapter->hw_addr + REG_TIMB_IER);
356 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
357 }
358 /* enable the switch */
359 ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE);
360 }
361
362 static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest)
363 {
364 int i;
365 u16 mac;
366
367 for (i = 0; i < ETH_ALEN; i++)
368 dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i);
369
370 if (adapter->conf_flags & MICREL_KS884X) {
371 /*
372 the sequence of saving mac addr between MAC and Switch is
373 different.
374 */
375
376 mac = ks8842_read16(adapter, 2, REG_MARL);
377 ks8842_write16(adapter, 39, mac, REG_MACAR3);
378 mac = ks8842_read16(adapter, 2, REG_MARM);
379 ks8842_write16(adapter, 39, mac, REG_MACAR2);
380 mac = ks8842_read16(adapter, 2, REG_MARH);
381 ks8842_write16(adapter, 39, mac, REG_MACAR1);
382 } else {
383
384 /* make sure the switch port uses the same MAC as the QMU */
385 mac = ks8842_read16(adapter, 2, REG_MARL);
386 ks8842_write16(adapter, 39, mac, REG_MACAR1);
387 mac = ks8842_read16(adapter, 2, REG_MARM);
388 ks8842_write16(adapter, 39, mac, REG_MACAR2);
389 mac = ks8842_read16(adapter, 2, REG_MARH);
390 ks8842_write16(adapter, 39, mac, REG_MACAR3);
391 }
392 }
393
394 static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac)
395 {
396 unsigned long flags;
397 unsigned i;
398
399 spin_lock_irqsave(&adapter->lock, flags);
400 for (i = 0; i < ETH_ALEN; i++) {
401 ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
402 if (!(adapter->conf_flags & MICREL_KS884X))
403 ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
404 REG_MACAR1 + i);
405 }
406
407 if (adapter->conf_flags & MICREL_KS884X) {
408 /*
409 the sequence of saving mac addr between MAC and Switch is
410 different.
411 */
412
413 u16 mac;
414
415 mac = ks8842_read16(adapter, 2, REG_MARL);
416 ks8842_write16(adapter, 39, mac, REG_MACAR3);
417 mac = ks8842_read16(adapter, 2, REG_MARM);
418 ks8842_write16(adapter, 39, mac, REG_MACAR2);
419 mac = ks8842_read16(adapter, 2, REG_MARH);
420 ks8842_write16(adapter, 39, mac, REG_MACAR1);
421 }
422 spin_unlock_irqrestore(&adapter->lock, flags);
423 }
424
425 static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
426 {
427 return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff;
428 }
429
430 static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev)
431 {
432 struct ks8842_adapter *adapter = netdev_priv(netdev);
433 struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx;
434 u8 *buf = ctl->buf;
435
436 if (ctl->adesc) {
437 netdev_dbg(netdev, "%s: TX ongoing\n", __func__);
438 /* transfer ongoing */
439 return NETDEV_TX_BUSY;
440 }
441
442 sg_dma_len(&ctl->sg) = skb->len + sizeof(u32);
443
444 /* copy data to the TX buffer */
445 /* the control word, enable IRQ, port 1 and the length */
446 *buf++ = 0x00;
447 *buf++ = 0x01; /* Port 1 */
448 *buf++ = skb->len & 0xff;
449 *buf++ = (skb->len >> 8) & 0xff;
450 skb_copy_from_linear_data(skb, buf, skb->len);
451
452 dma_sync_single_range_for_device(adapter->dev,
453 sg_dma_address(&ctl->sg), 0, sg_dma_len(&ctl->sg),
454 DMA_TO_DEVICE);
455
456 /* make sure the length is a multiple of 4 */
457 if (sg_dma_len(&ctl->sg) % 4)
458 sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4;
459
460 ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
461 &ctl->sg, 1, DMA_TO_DEVICE,
462 DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
463 if (!ctl->adesc)
464 return NETDEV_TX_BUSY;
465
466 ctl->adesc->callback_param = netdev;
467 ctl->adesc->callback = ks8842_dma_tx_cb;
468 ctl->adesc->tx_submit(ctl->adesc);
469
470 netdev->stats.tx_bytes += skb->len;
471
472 dev_kfree_skb(skb);
473
474 return NETDEV_TX_OK;
475 }
476
477 static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
478 {
479 struct ks8842_adapter *adapter = netdev_priv(netdev);
480 int len = skb->len;
481
482 netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n",
483 __func__, skb->len, skb->head, skb->data,
484 skb_tail_pointer(skb), skb_end_pointer(skb));
485
486 /* check FIFO buffer space, we need space for CRC and command bits */
487 if (ks8842_tx_fifo_space(adapter) < len + 8)
488 return NETDEV_TX_BUSY;
489
490 if (adapter->conf_flags & KS884X_16BIT) {
491 u16 *ptr16 = (u16 *)skb->data;
492 ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO);
493 ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI);
494 netdev->stats.tx_bytes += len;
495
496 /* copy buffer */
497 while (len > 0) {
498 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO);
499 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI);
500 len -= sizeof(u32);
501 }
502 } else {
503
504 u32 *ptr = (u32 *)skb->data;
505 u32 ctrl;
506 /* the control word, enable IRQ, port 1 and the length */
507 ctrl = 0x8000 | 0x100 | (len << 16);
508 ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
509
510 netdev->stats.tx_bytes += len;
511
512 /* copy buffer */
513 while (len > 0) {
514 iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
515 len -= sizeof(u32);
516 ptr++;
517 }
518 }
519
520 /* enqueue packet */
521 ks8842_write16(adapter, 17, 1, REG_TXQCR);
522
523 dev_kfree_skb(skb);
524
525 return NETDEV_TX_OK;
526 }
527
528 static void ks8842_update_rx_err_counters(struct net_device *netdev, u32 status)
529 {
530 netdev_dbg(netdev, "RX error, status: %x\n", status);
531
532 netdev->stats.rx_errors++;
533 if (status & RXSR_TOO_LONG)
534 netdev->stats.rx_length_errors++;
535 if (status & RXSR_CRC_ERROR)
536 netdev->stats.rx_crc_errors++;
537 if (status & RXSR_RUNT)
538 netdev->stats.rx_frame_errors++;
539 }
540
541 static void ks8842_update_rx_counters(struct net_device *netdev, u32 status,
542 int len)
543 {
544 netdev_dbg(netdev, "RX packet, len: %d\n", len);
545
546 netdev->stats.rx_packets++;
547 netdev->stats.rx_bytes += len;
548 if (status & RXSR_MULTICAST)
549 netdev->stats.multicast++;
550 }
551
552 static int __ks8842_start_new_rx_dma(struct net_device *netdev)
553 {
554 struct ks8842_adapter *adapter = netdev_priv(netdev);
555 struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx;
556 struct scatterlist *sg = &ctl->sg;
557 int err;
558
559 ctl->skb = netdev_alloc_skb(netdev, DMA_BUFFER_SIZE);
560 if (ctl->skb) {
561 sg_init_table(sg, 1);
562 sg_dma_address(sg) = dma_map_single(adapter->dev,
563 ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
564 err = dma_mapping_error(adapter->dev, sg_dma_address(sg));
565 if (unlikely(err)) {
566 sg_dma_address(sg) = 0;
567 goto out;
568 }
569
570 sg_dma_len(sg) = DMA_BUFFER_SIZE;
571
572 ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
573 sg, 1, DMA_FROM_DEVICE,
574 DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
575
576 if (!ctl->adesc)
577 goto out;
578
579 ctl->adesc->callback_param = netdev;
580 ctl->adesc->callback = ks8842_dma_rx_cb;
581 ctl->adesc->tx_submit(ctl->adesc);
582 } else {
583 err = -ENOMEM;
584 sg_dma_address(sg) = 0;
585 goto out;
586 }
587
588 return err;
589 out:
590 if (sg_dma_address(sg))
591 dma_unmap_single(adapter->dev, sg_dma_address(sg),
592 DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
593 sg_dma_address(sg) = 0;
594 if (ctl->skb)
595 dev_kfree_skb(ctl->skb);
596
597 ctl->skb = NULL;
598
599 printk(KERN_ERR DRV_NAME": Failed to start RX DMA: %d\n", err);
600 return err;
601 }
602
603 static void ks8842_rx_frame_dma_tasklet(unsigned long arg)
604 {
605 struct net_device *netdev = (struct net_device *)arg;
606 struct ks8842_adapter *adapter = netdev_priv(netdev);
607 struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx;
608 struct sk_buff *skb = ctl->skb;
609 dma_addr_t addr = sg_dma_address(&ctl->sg);
610 u32 status;
611
612 ctl->adesc = NULL;
613
614 /* kick next transfer going */
615 __ks8842_start_new_rx_dma(netdev);
616
617 /* now handle the data we got */
618 dma_unmap_single(adapter->dev, addr, DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
619
620 status = *((u32 *)skb->data);
621
622 netdev_dbg(netdev, "%s - rx_data: status: %x\n",
623 __func__, status & 0xffff);
624
625 /* check the status */
626 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
627 int len = (status >> 16) & 0x7ff;
628
629 ks8842_update_rx_counters(netdev, status, len);
630
631 /* reserve 4 bytes which is the status word */
632 skb_reserve(skb, 4);
633 skb_put(skb, len);
634
635 skb->protocol = eth_type_trans(skb, netdev);
636 netif_rx(skb);
637 } else {
638 ks8842_update_rx_err_counters(netdev, status);
639 dev_kfree_skb(skb);
640 }
641 }
642
643 static void ks8842_rx_frame(struct net_device *netdev,
644 struct ks8842_adapter *adapter)
645 {
646 u32 status;
647 int len;
648
649 if (adapter->conf_flags & KS884X_16BIT) {
650 status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO);
651 len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI);
652 netdev_dbg(netdev, "%s - rx_data: status: %x\n",
653 __func__, status);
654 } else {
655 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO);
656 len = (status >> 16) & 0x7ff;
657 status &= 0xffff;
658 netdev_dbg(netdev, "%s - rx_data: status: %x\n",
659 __func__, status);
660 }
661
662 /* check the status */
663 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
664 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len);
665
666 if (skb) {
667
668 ks8842_update_rx_counters(netdev, status, len);
669
670 if (adapter->conf_flags & KS884X_16BIT) {
671 u16 *data16 = (u16 *)skb_put(skb, len);
672 ks8842_select_bank(adapter, 17);
673 while (len > 0) {
674 *data16++ = ioread16(adapter->hw_addr +
675 REG_QMU_DATA_LO);
676 *data16++ = ioread16(adapter->hw_addr +
677 REG_QMU_DATA_HI);
678 len -= sizeof(u32);
679 }
680 } else {
681 u32 *data = (u32 *)skb_put(skb, len);
682
683 ks8842_select_bank(adapter, 17);
684 while (len > 0) {
685 *data++ = ioread32(adapter->hw_addr +
686 REG_QMU_DATA_LO);
687 len -= sizeof(u32);
688 }
689 }
690 skb->protocol = eth_type_trans(skb, netdev);
691 netif_rx(skb);
692 } else
693 netdev->stats.rx_dropped++;
694 } else
695 ks8842_update_rx_err_counters(netdev, status);
696
697 /* set high watermark to 3K */
698 ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR);
699
700 /* release the frame */
701 ks8842_write16(adapter, 17, 0x01, REG_RXQCR);
702
703 /* set high watermark to 2K */
704 ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR);
705 }
706
707 void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter)
708 {
709 u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
710 netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data);
711 while (rx_data) {
712 ks8842_rx_frame(netdev, adapter);
713 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
714 }
715 }
716
717 void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter)
718 {
719 u16 sr = ks8842_read16(adapter, 16, REG_TXSR);
720 netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr);
721 netdev->stats.tx_packets++;
722 if (netif_queue_stopped(netdev))
723 netif_wake_queue(netdev);
724 }
725
726 void ks8842_handle_rx_overrun(struct net_device *netdev,
727 struct ks8842_adapter *adapter)
728 {
729 netdev_dbg(netdev, "%s: entry\n", __func__);
730 netdev->stats.rx_errors++;
731 netdev->stats.rx_fifo_errors++;
732 }
733
734 void ks8842_tasklet(unsigned long arg)
735 {
736 struct net_device *netdev = (struct net_device *)arg;
737 struct ks8842_adapter *adapter = netdev_priv(netdev);
738 u16 isr;
739 unsigned long flags;
740 u16 entry_bank;
741
742 /* read current bank to be able to set it back */
743 spin_lock_irqsave(&adapter->lock, flags);
744 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
745 spin_unlock_irqrestore(&adapter->lock, flags);
746
747 isr = ks8842_read16(adapter, 18, REG_ISR);
748 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
749
750 /* when running in DMA mode, do not ack RX interrupts, it is handled
751 internally by timberdale, otherwise it's DMA FIFO:s would stop
752 */
753 if (KS8842_USE_DMA(adapter))
754 isr &= ~IRQ_RX;
755
756 /* Ack */
757 ks8842_write16(adapter, 18, isr, REG_ISR);
758
759 if (!(adapter->conf_flags & MICREL_KS884X))
760 /* Ack in the timberdale IP as well */
761 iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR);
762
763 if (!netif_running(netdev))
764 return;
765
766 if (isr & IRQ_LINK_CHANGE)
767 ks8842_update_link_status(netdev, adapter);
768
769 /* should not get IRQ_RX when running DMA mode */
770 if (isr & (IRQ_RX | IRQ_RX_ERROR) && !KS8842_USE_DMA(adapter))
771 ks8842_handle_rx(netdev, adapter);
772
773 /* should only happen when in PIO mode */
774 if (isr & IRQ_TX)
775 ks8842_handle_tx(netdev, adapter);
776
777 if (isr & IRQ_RX_OVERRUN)
778 ks8842_handle_rx_overrun(netdev, adapter);
779
780 if (isr & IRQ_TX_STOPPED) {
781 ks8842_disable_tx(adapter);
782 ks8842_enable_tx(adapter);
783 }
784
785 if (isr & IRQ_RX_STOPPED) {
786 ks8842_disable_rx(adapter);
787 ks8842_enable_rx(adapter);
788 }
789
790 /* re-enable interrupts, put back the bank selection register */
791 spin_lock_irqsave(&adapter->lock, flags);
792 if (KS8842_USE_DMA(adapter))
793 ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER);
794 else
795 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
796 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
797
798 /* Make sure timberdale continues DMA operations, they are stopped while
799 we are handling the ks8842 because we might change bank */
800 if (KS8842_USE_DMA(adapter))
801 ks8842_resume_dma(adapter);
802
803 spin_unlock_irqrestore(&adapter->lock, flags);
804 }
805
806 static irqreturn_t ks8842_irq(int irq, void *devid)
807 {
808 struct net_device *netdev = devid;
809 struct ks8842_adapter *adapter = netdev_priv(netdev);
810 u16 isr;
811 u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
812 irqreturn_t ret = IRQ_NONE;
813
814 isr = ks8842_read16(adapter, 18, REG_ISR);
815 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
816
817 if (isr) {
818 if (KS8842_USE_DMA(adapter))
819 /* disable all but RX IRQ, since the FPGA relies on it*/
820 ks8842_write16(adapter, 18, IRQ_RX, REG_IER);
821 else
822 /* disable IRQ */
823 ks8842_write16(adapter, 18, 0x00, REG_IER);
824
825 /* schedule tasklet */
826 tasklet_schedule(&adapter->tasklet);
827
828 ret = IRQ_HANDLED;
829 }
830
831 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
832
833 /* After an interrupt, tell timberdale to continue DMA operations.
834 DMA is disabled while we are handling the ks8842 because we might
835 change bank */
836 ks8842_resume_dma(adapter);
837
838 return ret;
839 }
840
841 static void ks8842_dma_rx_cb(void *data)
842 {
843 struct net_device *netdev = data;
844 struct ks8842_adapter *adapter = netdev_priv(netdev);
845
846 netdev_dbg(netdev, "RX DMA finished\n");
847 /* schedule tasklet */
848 if (adapter->dma_rx.adesc)
849 tasklet_schedule(&adapter->dma_rx.tasklet);
850 }
851
852 static void ks8842_dma_tx_cb(void *data)
853 {
854 struct net_device *netdev = data;
855 struct ks8842_adapter *adapter = netdev_priv(netdev);
856 struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx;
857
858 netdev_dbg(netdev, "TX DMA finished\n");
859
860 if (!ctl->adesc)
861 return;
862
863 netdev->stats.tx_packets++;
864 ctl->adesc = NULL;
865
866 if (netif_queue_stopped(netdev))
867 netif_wake_queue(netdev);
868 }
869
870 static void ks8842_stop_dma(struct ks8842_adapter *adapter)
871 {
872 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx;
873 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx;
874
875 tx_ctl->adesc = NULL;
876 if (tx_ctl->chan)
877 tx_ctl->chan->device->device_control(tx_ctl->chan,
878 DMA_TERMINATE_ALL, 0);
879
880 rx_ctl->adesc = NULL;
881 if (rx_ctl->chan)
882 rx_ctl->chan->device->device_control(rx_ctl->chan,
883 DMA_TERMINATE_ALL, 0);
884
885 if (sg_dma_address(&rx_ctl->sg))
886 dma_unmap_single(adapter->dev, sg_dma_address(&rx_ctl->sg),
887 DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
888 sg_dma_address(&rx_ctl->sg) = 0;
889
890 dev_kfree_skb(rx_ctl->skb);
891 rx_ctl->skb = NULL;
892 }
893
894 static void ks8842_dealloc_dma_bufs(struct ks8842_adapter *adapter)
895 {
896 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx;
897 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx;
898
899 ks8842_stop_dma(adapter);
900
901 if (tx_ctl->chan)
902 dma_release_channel(tx_ctl->chan);
903 tx_ctl->chan = NULL;
904
905 if (rx_ctl->chan)
906 dma_release_channel(rx_ctl->chan);
907 rx_ctl->chan = NULL;
908
909 tasklet_kill(&rx_ctl->tasklet);
910
911 if (sg_dma_address(&tx_ctl->sg))
912 dma_unmap_single(adapter->dev, sg_dma_address(&tx_ctl->sg),
913 DMA_BUFFER_SIZE, DMA_TO_DEVICE);
914 sg_dma_address(&tx_ctl->sg) = 0;
915
916 kfree(tx_ctl->buf);
917 tx_ctl->buf = NULL;
918 }
919
920 static bool ks8842_dma_filter_fn(struct dma_chan *chan, void *filter_param)
921 {
922 return chan->chan_id == (long)filter_param;
923 }
924
925 static int ks8842_alloc_dma_bufs(struct net_device *netdev)
926 {
927 struct ks8842_adapter *adapter = netdev_priv(netdev);
928 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx;
929 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx;
930 int err;
931
932 dma_cap_mask_t mask;
933
934 dma_cap_zero(mask);
935 dma_cap_set(DMA_SLAVE, mask);
936 dma_cap_set(DMA_PRIVATE, mask);
937
938 sg_init_table(&tx_ctl->sg, 1);
939
940 tx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn,
941 (void *)(long)tx_ctl->channel);
942 if (!tx_ctl->chan) {
943 err = -ENODEV;
944 goto err;
945 }
946
947 /* allocate DMA buffer */
948 tx_ctl->buf = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL);
949 if (!tx_ctl->buf) {
950 err = -ENOMEM;
951 goto err;
952 }
953
954 sg_dma_address(&tx_ctl->sg) = dma_map_single(adapter->dev,
955 tx_ctl->buf, DMA_BUFFER_SIZE, DMA_TO_DEVICE);
956 err = dma_mapping_error(adapter->dev,
957 sg_dma_address(&tx_ctl->sg));
958 if (err) {
959 sg_dma_address(&tx_ctl->sg) = 0;
960 goto err;
961 }
962
963 rx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn,
964 (void *)(long)rx_ctl->channel);
965 if (!rx_ctl->chan) {
966 err = -ENODEV;
967 goto err;
968 }
969
970 tasklet_init(&rx_ctl->tasklet, ks8842_rx_frame_dma_tasklet,
971 (unsigned long)netdev);
972
973 return 0;
974 err:
975 ks8842_dealloc_dma_bufs(adapter);
976 return err;
977 }
978
979 /* Netdevice operations */
980
981 static int ks8842_open(struct net_device *netdev)
982 {
983 struct ks8842_adapter *adapter = netdev_priv(netdev);
984 int err;
985
986 netdev_dbg(netdev, "%s - entry\n", __func__);
987
988 if (KS8842_USE_DMA(adapter)) {
989 err = ks8842_alloc_dma_bufs(netdev);
990
991 if (!err) {
992 /* start RX dma */
993 err = __ks8842_start_new_rx_dma(netdev);
994 if (err)
995 ks8842_dealloc_dma_bufs(adapter);
996 }
997
998 if (err) {
999 printk(KERN_WARNING DRV_NAME
1000 ": Failed to initiate DMA, running PIO\n");
1001 ks8842_dealloc_dma_bufs(adapter);
1002 adapter->dma_rx.channel = -1;
1003 adapter->dma_tx.channel = -1;
1004 }
1005 }
1006
1007 /* reset the HW */
1008 ks8842_reset_hw(adapter);
1009
1010 ks8842_write_mac_addr(adapter, netdev->dev_addr);
1011
1012 ks8842_update_link_status(netdev, adapter);
1013
1014 err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
1015 netdev);
1016 if (err) {
1017 pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err);
1018 return err;
1019 }
1020
1021 return 0;
1022 }
1023
1024 static int ks8842_close(struct net_device *netdev)
1025 {
1026 struct ks8842_adapter *adapter = netdev_priv(netdev);
1027
1028 netdev_dbg(netdev, "%s - entry\n", __func__);
1029
1030 cancel_work_sync(&adapter->timeout_work);
1031
1032 if (KS8842_USE_DMA(adapter))
1033 ks8842_dealloc_dma_bufs(adapter);
1034
1035 /* free the irq */
1036 free_irq(adapter->irq, netdev);
1037
1038 /* disable the switch */
1039 ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE);
1040
1041 return 0;
1042 }
1043
1044 static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb,
1045 struct net_device *netdev)
1046 {
1047 int ret;
1048 struct ks8842_adapter *adapter = netdev_priv(netdev);
1049
1050 netdev_dbg(netdev, "%s: entry\n", __func__);
1051
1052 if (KS8842_USE_DMA(adapter)) {
1053 unsigned long flags;
1054 ret = ks8842_tx_frame_dma(skb, netdev);
1055 /* for now only allow one transfer at the time */
1056 spin_lock_irqsave(&adapter->lock, flags);
1057 if (adapter->dma_tx.adesc)
1058 netif_stop_queue(netdev);
1059 spin_unlock_irqrestore(&adapter->lock, flags);
1060 return ret;
1061 }
1062
1063 ret = ks8842_tx_frame(skb, netdev);
1064
1065 if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8)
1066 netif_stop_queue(netdev);
1067
1068 return ret;
1069 }
1070
1071 static int ks8842_set_mac(struct net_device *netdev, void *p)
1072 {
1073 struct ks8842_adapter *adapter = netdev_priv(netdev);
1074 struct sockaddr *addr = p;
1075 char *mac = (u8 *)addr->sa_data;
1076
1077 netdev_dbg(netdev, "%s: entry\n", __func__);
1078
1079 if (!is_valid_ether_addr(addr->sa_data))
1080 return -EADDRNOTAVAIL;
1081
1082 memcpy(netdev->dev_addr, mac, netdev->addr_len);
1083
1084 ks8842_write_mac_addr(adapter, mac);
1085 return 0;
1086 }
1087
1088 static void ks8842_tx_timeout_work(struct work_struct *work)
1089 {
1090 struct ks8842_adapter *adapter =
1091 container_of(work, struct ks8842_adapter, timeout_work);
1092 struct net_device *netdev = adapter->netdev;
1093 unsigned long flags;
1094
1095 netdev_dbg(netdev, "%s: entry\n", __func__);
1096
1097 spin_lock_irqsave(&adapter->lock, flags);
1098
1099 if (KS8842_USE_DMA(adapter))
1100 ks8842_stop_dma(adapter);
1101
1102 /* disable interrupts */
1103 ks8842_write16(adapter, 18, 0, REG_IER);
1104 ks8842_write16(adapter, 18, 0xFFFF, REG_ISR);
1105
1106 netif_stop_queue(netdev);
1107
1108 spin_unlock_irqrestore(&adapter->lock, flags);
1109
1110 ks8842_reset_hw(adapter);
1111
1112 ks8842_write_mac_addr(adapter, netdev->dev_addr);
1113
1114 ks8842_update_link_status(netdev, adapter);
1115
1116 if (KS8842_USE_DMA(adapter))
1117 __ks8842_start_new_rx_dma(netdev);
1118 }
1119
1120 static void ks8842_tx_timeout(struct net_device *netdev)
1121 {
1122 struct ks8842_adapter *adapter = netdev_priv(netdev);
1123
1124 netdev_dbg(netdev, "%s: entry\n", __func__);
1125
1126 schedule_work(&adapter->timeout_work);
1127 }
1128
1129 static const struct net_device_ops ks8842_netdev_ops = {
1130 .ndo_open = ks8842_open,
1131 .ndo_stop = ks8842_close,
1132 .ndo_start_xmit = ks8842_xmit_frame,
1133 .ndo_set_mac_address = ks8842_set_mac,
1134 .ndo_tx_timeout = ks8842_tx_timeout,
1135 .ndo_validate_addr = eth_validate_addr
1136 };
1137
1138 static const struct ethtool_ops ks8842_ethtool_ops = {
1139 .get_link = ethtool_op_get_link,
1140 };
1141
1142 static int __devinit ks8842_probe(struct platform_device *pdev)
1143 {
1144 int err = -ENOMEM;
1145 struct resource *iomem;
1146 struct net_device *netdev;
1147 struct ks8842_adapter *adapter;
1148 struct ks8842_platform_data *pdata = pdev->dev.platform_data;
1149 u16 id;
1150 unsigned i;
1151
1152 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1153 if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
1154 goto err_mem_region;
1155
1156 netdev = alloc_etherdev(sizeof(struct ks8842_adapter));
1157 if (!netdev)
1158 goto err_alloc_etherdev;
1159
1160 SET_NETDEV_DEV(netdev, &pdev->dev);
1161
1162 adapter = netdev_priv(netdev);
1163 adapter->netdev = netdev;
1164 INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work);
1165 adapter->hw_addr = ioremap(iomem->start, resource_size(iomem));
1166 adapter->conf_flags = iomem->flags;
1167
1168 if (!adapter->hw_addr)
1169 goto err_ioremap;
1170
1171 adapter->irq = platform_get_irq(pdev, 0);
1172 if (adapter->irq < 0) {
1173 err = adapter->irq;
1174 goto err_get_irq;
1175 }
1176
1177 adapter->dev = (pdev->dev.parent) ? pdev->dev.parent : &pdev->dev;
1178
1179 /* DMA is only supported when accessed via timberdale */
1180 if (!(adapter->conf_flags & MICREL_KS884X) && pdata &&
1181 (pdata->tx_dma_channel != -1) &&
1182 (pdata->rx_dma_channel != -1)) {
1183 adapter->dma_rx.channel = pdata->rx_dma_channel;
1184 adapter->dma_tx.channel = pdata->tx_dma_channel;
1185 } else {
1186 adapter->dma_rx.channel = -1;
1187 adapter->dma_tx.channel = -1;
1188 }
1189
1190 tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev);
1191 spin_lock_init(&adapter->lock);
1192
1193 netdev->netdev_ops = &ks8842_netdev_ops;
1194 netdev->ethtool_ops = &ks8842_ethtool_ops;
1195
1196 /* Check if a mac address was given */
1197 i = netdev->addr_len;
1198 if (pdata) {
1199 for (i = 0; i < netdev->addr_len; i++)
1200 if (pdata->macaddr[i] != 0)
1201 break;
1202
1203 if (i < netdev->addr_len)
1204 /* an address was passed, use it */
1205 memcpy(netdev->dev_addr, pdata->macaddr,
1206 netdev->addr_len);
1207 }
1208
1209 if (i == netdev->addr_len) {
1210 ks8842_read_mac_addr(adapter, netdev->dev_addr);
1211
1212 if (!is_valid_ether_addr(netdev->dev_addr))
1213 random_ether_addr(netdev->dev_addr);
1214 }
1215
1216 id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
1217
1218 strcpy(netdev->name, "eth%d");
1219 err = register_netdev(netdev);
1220 if (err)
1221 goto err_register;
1222
1223 platform_set_drvdata(pdev, netdev);
1224
1225 pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n",
1226 (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7);
1227
1228 return 0;
1229
1230 err_register:
1231 err_get_irq:
1232 iounmap(adapter->hw_addr);
1233 err_ioremap:
1234 free_netdev(netdev);
1235 err_alloc_etherdev:
1236 release_mem_region(iomem->start, resource_size(iomem));
1237 err_mem_region:
1238 return err;
1239 }
1240
1241 static int __devexit ks8842_remove(struct platform_device *pdev)
1242 {
1243 struct net_device *netdev = platform_get_drvdata(pdev);
1244 struct ks8842_adapter *adapter = netdev_priv(netdev);
1245 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1246
1247 unregister_netdev(netdev);
1248 tasklet_kill(&adapter->tasklet);
1249 iounmap(adapter->hw_addr);
1250 free_netdev(netdev);
1251 release_mem_region(iomem->start, resource_size(iomem));
1252 platform_set_drvdata(pdev, NULL);
1253 return 0;
1254 }
1255
1256
1257 static struct platform_driver ks8842_platform_driver = {
1258 .driver = {
1259 .name = DRV_NAME,
1260 .owner = THIS_MODULE,
1261 },
1262 .probe = ks8842_probe,
1263 .remove = ks8842_remove,
1264 };
1265
1266 static int __init ks8842_init(void)
1267 {
1268 return platform_driver_register(&ks8842_platform_driver);
1269 }
1270
1271 static void __exit ks8842_exit(void)
1272 {
1273 platform_driver_unregister(&ks8842_platform_driver);
1274 }
1275
1276 module_init(ks8842_init);
1277 module_exit(ks8842_exit);
1278
1279 MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver");
1280 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
1281 MODULE_LICENSE("GPL v2");
1282 MODULE_ALIAS("platform:ks8842");
1283
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree