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ll_temac: fix DMA resources leak
[linux-2.6-block.git] / drivers / net / ks8842.c
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\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 1/*
a1aa8822 2 * ks8842.c timberdale KS8842 ethernet driver
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="20">b07878e5
R		 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 */
22
0dc7d2b3
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5
R		 25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/platform_device.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
30#include <linux/ethtool.h>
a1aa8822 31#include <linux/ks8842.h>
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="90">b07878e5
R		 32
33#define DRV_NAME "ks8842"
34
35/* Timberdale specific Registers */
36#define REG_TIMB_RST 0x1c
37
38/* KS8842 registers */
39
40#define REG_SELECT_BANK 0x0e
41
42/* bank 0 registers */
43#define REG_QRFCR 0x04
44
45/* bank 2 registers */
46#define REG_MARL 0x00
47#define REG_MARM 0x02
48#define REG_MARH 0x04
49
50/* bank 3 registers */
51#define REG_GRR 0x06
52
53/* bank 16 registers */
54#define REG_TXCR 0x00
55#define REG_TXSR 0x02
56#define REG_RXCR 0x04
57#define REG_TXMIR 0x08
58#define REG_RXMIR 0x0A
59
60/* bank 17 registers */
61#define REG_TXQCR 0x00
62#define REG_RXQCR 0x02
63#define REG_TXFDPR 0x04
64#define REG_RXFDPR 0x06
65#define REG_QMU_DATA_LO 0x08
66#define REG_QMU_DATA_HI 0x0A
67
68/* bank 18 registers */
69#define REG_IER 0x00
70#define IRQ_LINK_CHANGE 0x8000
71#define IRQ_TX 0x4000
72#define IRQ_RX 0x2000
73#define IRQ_RX_OVERRUN 0x0800
74#define IRQ_TX_STOPPED 0x0200
75#define IRQ_RX_STOPPED 0x0100
76#define IRQ_RX_ERROR 0x0080
77#define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \
78 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR)
79#define REG_ISR 0x02
80#define REG_RXSR 0x04
81#define RXSR_VALID 0x8000
82#define RXSR_BROADCAST 0x80
83#define RXSR_MULTICAST 0x40
84#define RXSR_UNICAST 0x20
85#define RXSR_FRAMETYPE 0x08
86#define RXSR_TOO_LONG 0x04
87#define RXSR_RUNT 0x02
88#define RXSR_CRC_ERROR 0x01
89#define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR)
90
91/* bank 32 registers */
92#define REG_SW_ID_AND_ENABLE 0x00
93#define REG_SGCR1 0x02
94#define REG_SGCR2 0x04
95#define REG_SGCR3 0x06
96
97/* bank 39 registers */
98#define REG_MACAR1 0x00
99#define REG_MACAR2 0x02
100#define REG_MACAR3 0x04
101
102/* bank 45 registers */
103#define REG_P1MBCR 0x00
104#define REG_P1MBSR 0x02
105
106/* bank 46 registers */
107#define REG_P2MBCR 0x00
108#define REG_P2MBSR 0x02
109
110/* bank 48 registers */
111#define REG_P1CR2 0x02
112
113/* bank 49 registers */
114#define REG_P1CR4 0x02
115#define REG_P1SR 0x04
116
117struct ks8842_adapter {
118 void __iomem *hw_addr;
119 int irq;
120 struct tasklet_struct tasklet;
121 spinlock_t lock; /* spinlock to be interrupt safe */
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="185">b07878e5
R		 122};
123
124static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank)
125{
126 iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK);
127}
128
129static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank,
130 u8 value, int offset)
131{
132 ks8842_select_bank(adapter, bank);
133 iowrite8(value, adapter->hw_addr + offset);
134}
135
136static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank,
137 u16 value, int offset)
138{
139 ks8842_select_bank(adapter, bank);
140 iowrite16(value, adapter->hw_addr + offset);
141}
142
143static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank,
144 u16 bits, int offset)
145{
146 u16 reg;
147 ks8842_select_bank(adapter, bank);
148 reg = ioread16(adapter->hw_addr + offset);
149 reg |= bits;
150 iowrite16(reg, adapter->hw_addr + offset);
151}
152
153static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank,
154 u16 bits, int offset)
155{
156 u16 reg;
157 ks8842_select_bank(adapter, bank);
158 reg = ioread16(adapter->hw_addr + offset);
159 reg &= ~bits;
160 iowrite16(reg, adapter->hw_addr + offset);
161}
162
163static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank,
164 u32 value, int offset)
165{
166 ks8842_select_bank(adapter, bank);
167 iowrite32(value, adapter->hw_addr + offset);
168}
169
170static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank,
171 int offset)
172{
173 ks8842_select_bank(adapter, bank);
174 return ioread8(adapter->hw_addr + offset);
175}
176
177static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank,
178 int offset)
179{
180 ks8842_select_bank(adapter, bank);
181 return ioread16(adapter->hw_addr + offset);
182}
183
184static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank,
185 int offset)
186{
187 ks8842_select_bank(adapter, bank);
188 return ioread32(adapter->hw_addr + offset);
189}
190
191static void ks8842_reset(struct ks8842_adapter *adapter)
192{
193 /* The KS8842 goes haywire when doing softare reset
194 * a work around in the timberdale IP is implemented to
195 * do a hardware reset instead
196 ks8842_write16(adapter, 3, 1, REG_GRR);
197 msleep(10);
198 iowrite16(0, adapter->hw_addr + REG_GRR);
199 */
200 iowrite16(32, adapter->hw_addr + REG_SELECT_BANK);
201 iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST);
202 msleep(20);
203}
204
205static void ks8842_update_link_status(struct net_device *netdev,
206 struct ks8842_adapter *adapter)
207{
208 /* check the status of the link */
209 if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) {
210 netif_carrier_on(netdev);
211 netif_wake_queue(netdev);
212 } else {
213 netif_stop_queue(netdev);
214 netif_carrier_off(netdev);
215 }
216}
217
218static void ks8842_enable_tx(struct ks8842_adapter *adapter)
219{
220 ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR);
221}
222
223static void ks8842_disable_tx(struct ks8842_adapter *adapter)
224{
225 ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR);
226}
227
228static void ks8842_enable_rx(struct ks8842_adapter *adapter)
229{
230 ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR);
231}
232
233static void ks8842_disable_rx(struct ks8842_adapter *adapter)
234{
235 ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR);
236}
237
238static void ks8842_reset_hw(struct ks8842_adapter *adapter)
239{
240 /* reset the HW */
241 ks8842_reset(adapter);
242
243 /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */
244 ks8842_write16(adapter, 16, 0x000E, REG_TXCR);
245
246 /* enable the receiver, uni + multi + broadcast + flow ctrl
247 + crc strip */
248 ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400,
249 REG_RXCR);
250
251 /* TX frame pointer autoincrement */
252 ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR);
253
254 /* RX frame pointer autoincrement */
255 ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR);
256
257 /* RX 2 kb high watermark */
258 ks8842_write16(adapter, 0, 0x1000, REG_QRFCR);
259
260 /* aggresive back off in half duplex */
261 ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1);
262
263 /* enable no excessive collison drop */
264 ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2);
265
266 /* Enable port 1 force flow control / back pressure / transmit / recv */
267 ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2);
268
269 /* restart port auto-negotiation */
270 ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4);
271 /* only advertise 10Mbps */
272 ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4);
273
274 /* Enable the transmitter */
275 ks8842_enable_tx(adapter);
276
277 /* Enable the receiver */
278 ks8842_enable_rx(adapter);
279
280 /* clear all interrupts */
281 ks8842_write16(adapter, 18, 0xffff, REG_ISR);
282
283 /* enable interrupts */
284 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
285
286 /* enable the switch */
287 ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE);
288}
289
290static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest)
291{
292 int i;
293 u16 mac;
294
295 for (i = 0; i < ETH_ALEN; i++)
296 dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i);
297
298 /* make sure the switch port uses the same MAC as the QMU */
299 mac = ks8842_read16(adapter, 2, REG_MARL);
300 ks8842_write16(adapter, 39, mac, REG_MACAR1);
301 mac = ks8842_read16(adapter, 2, REG_MARM);
302 ks8842_write16(adapter, 39, mac, REG_MACAR2);
303 mac = ks8842_read16(adapter, 2, REG_MARH);
304 ks8842_write16(adapter, 39, mac, REG_MACAR3);
305}
306
a1aa8822
RR		 307static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac)
308{
309 unsigned long flags;
310 unsigned i;
311
312 spin_lock_irqsave(&adapter->lock, flags);
313 for (i = 0; i < ETH_ALEN; i++) {
314 ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
315 ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
316 REG_MACAR1 + i);
317 }
318 spin_unlock_irqrestore(&adapter->lock, flags);
319}
320
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5
R		 321static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
322{
323 return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff;
324}
325
326static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
327{
328 struct ks8842_adapter *adapter = netdev_priv(netdev);
329 int len = skb->len;
330 u32 *ptr = (u32 *)skb->data;
331 u32 ctrl;
332
a99db196 333 netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n",
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="36">b07878e5
R		 334 __func__, skb->len, skb->head, skb->data,
335 skb_tail_pointer(skb), skb_end_pointer(skb));
336
337 /* check FIFO buffer space, we need space for CRC and command bits */
338 if (ks8842_tx_fifo_space(adapter) < len + 8)
339 return NETDEV_TX_BUSY;
340
341 /* the control word, enable IRQ, port 1 and the length */
342 ctrl = 0x8000 | 0x100 | (len << 16);
343 ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
344
345 netdev->stats.tx_bytes += len;
346
347 /* copy buffer */
348 while (len > 0) {
349 iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
350 len -= sizeof(u32);
351 ptr++;
352 }
353
354 /* enqueue packet */
355 ks8842_write16(adapter, 17, 1, REG_TXQCR);
356
357 dev_kfree_skb(skb);
358
359 return NETDEV_TX_OK;
360}
361
362static void ks8842_rx_frame(struct net_device *netdev,
363 struct ks8842_adapter *adapter)
364{
365 u32 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO);
366 int len = (status >> 16) & 0x7ff;
367
368 status &= 0xffff;
369
a99db196 370 netdev_dbg(netdev, "%s - rx_data: status: %x\n", __func__, status);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5
R		 371
372 /* check the status */
373 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
89d71a66 374 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len);
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 375
a99db196 376 netdev_dbg(netdev, "%s, got package, len: %d\n", __func__, len);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="8">b07878e5
R		 377 if (skb) {
378 u32 *data;
379
380 netdev->stats.rx_packets++;
381 netdev->stats.rx_bytes += len;
382 if (status & RXSR_MULTICAST)
383 netdev->stats.multicast++;
384
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="14">b07878e5
R		 385 data = (u32 *)skb_put(skb, len);
386
387 ks8842_select_bank(adapter, 17);
388 while (len > 0) {
389 *data++ = ioread32(adapter->hw_addr +
390 REG_QMU_DATA_LO);
391 len -= sizeof(u32);
392 }
393
394 skb->protocol = eth_type_trans(skb, netdev);
395 netif_rx(skb);
396 } else
397 netdev->stats.rx_dropped++;
398 } else {
a99db196 399 netdev_dbg(netdev, "RX error, status: %x\n", status);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="22">b07878e5
R		 400 netdev->stats.rx_errors++;
401 if (status & RXSR_TOO_LONG)
402 netdev->stats.rx_length_errors++;
403 if (status & RXSR_CRC_ERROR)
404 netdev->stats.rx_crc_errors++;
405 if (status & RXSR_RUNT)
406 netdev->stats.rx_frame_errors++;
407 }
408
409 /* set high watermark to 3K */
410 ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR);
411
412 /* release the frame */
413 ks8842_write16(adapter, 17, 0x01, REG_RXQCR);
414
415 /* set high watermark to 2K */
416 ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR);
417}
418
419void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter)
420{
421 u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
a99db196 422 netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5
R		 423 while (rx_data) {
424 ks8842_rx_frame(netdev, adapter);
425 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
426 }
427}
428
429void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter)
430{
431 u16 sr = ks8842_read16(adapter, 16, REG_TXSR);
a99db196 432 netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="8">b07878e5
R		 433 netdev->stats.tx_packets++;
434 if (netif_queue_stopped(netdev))
435 netif_wake_queue(netdev);
436}
437
438void ks8842_handle_rx_overrun(struct net_device *netdev,
439 struct ks8842_adapter *adapter)
440{
a99db196 441 netdev_dbg(netdev, "%s: entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="18">b07878e5
R		 442 netdev->stats.rx_errors++;
443 netdev->stats.rx_fifo_errors++;
444}
445
446void ks8842_tasklet(unsigned long arg)
447{
448 struct net_device *netdev = (struct net_device *)arg;
449 struct ks8842_adapter *adapter = netdev_priv(netdev);
450 u16 isr;
451 unsigned long flags;
452 u16 entry_bank;
453
454 /* read current bank to be able to set it back */
455 spin_lock_irqsave(&adapter->lock, flags);
456 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
457 spin_unlock_irqrestore(&adapter->lock, flags);
458
459 isr = ks8842_read16(adapter, 18, REG_ISR);
a99db196 460 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="38">b07878e5
R		 461
462 /* Ack */
463 ks8842_write16(adapter, 18, isr, REG_ISR);
464
465 if (!netif_running(netdev))
466 return;
467
468 if (isr & IRQ_LINK_CHANGE)
469 ks8842_update_link_status(netdev, adapter);
470
471 if (isr & (IRQ_RX | IRQ_RX_ERROR))
472 ks8842_handle_rx(netdev, adapter);
473
474 if (isr & IRQ_TX)
475 ks8842_handle_tx(netdev, adapter);
476
477 if (isr & IRQ_RX_OVERRUN)
478 ks8842_handle_rx_overrun(netdev, adapter);
479
480 if (isr & IRQ_TX_STOPPED) {
481 ks8842_disable_tx(adapter);
482 ks8842_enable_tx(adapter);
483 }
484
485 if (isr & IRQ_RX_STOPPED) {
486 ks8842_disable_rx(adapter);
487 ks8842_enable_rx(adapter);
488 }
489
490 /* re-enable interrupts, put back the bank selection register */
491 spin_lock_irqsave(&adapter->lock, flags);
492 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
493 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
494 spin_unlock_irqrestore(&adapter->lock, flags);
495}
496
497static irqreturn_t ks8842_irq(int irq, void *devid)
498{
a99db196
RR		 499 struct net_device *netdev = devid;
500 struct ks8842_adapter *adapter = netdev_priv(netdev);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="5">b07878e5
R		 501 u16 isr;
502 u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
503 irqreturn_t ret = IRQ_NONE;
504
505 isr = ks8842_read16(adapter, 18, REG_ISR);
a99db196 506 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="24">b07878e5
R		 507
508 if (isr) {
509 /* disable IRQ */
510 ks8842_write16(adapter, 18, 0x00, REG_IER);
511
512 /* schedule tasklet */
513 tasklet_schedule(&adapter->tasklet);
514
515 ret = IRQ_HANDLED;
516 }
517
518 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
519
520 return ret;
521}
522
523
524/* Netdevice operations */
525
526static int ks8842_open(struct net_device *netdev)
527{
528 struct ks8842_adapter *adapter = netdev_priv(netdev);
529 int err;
530
a99db196 531 netdev_dbg(netdev, "%s - entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5
R		 532
533 /* reset the HW */
534 ks8842_reset_hw(adapter);
535
a1aa8822
RR		 536 ks8842_write_mac_addr(adapter, netdev->dev_addr);
537
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5
R		 538 ks8842_update_link_status(netdev, adapter);
539
540 err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
a99db196 541 netdev);
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 542 if (err) {
0dc7d2b3 543 pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="10">b07878e5
R		 544 return err;
545 }
546
547 return 0;
548}
549
550static int ks8842_close(struct net_device *netdev)
551{
552 struct ks8842_adapter *adapter = netdev_priv(netdev);
553
a99db196 554 netdev_dbg(netdev, "%s - entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5
R		 555
556 /* free the irq */
a99db196 557 free_irq(adapter->irq, netdev);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="7">b07878e5
R		 558
559 /* disable the switch */
560 ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE);
561
562 return 0;
563}
564
61357325
SH		 565static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb,
566 struct net_device *netdev)
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5
R		 567{
568 int ret;
569 struct ks8842_adapter *adapter = netdev_priv(netdev);
570
a99db196 571 netdev_dbg(netdev, "%s: entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5
R		 572
573 ret = ks8842_tx_frame(skb, netdev);
574
575 if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8)
576 netif_stop_queue(netdev);
577
578 return ret;
579}
580
581static int ks8842_set_mac(struct net_device *netdev, void *p)
582{
583 struct ks8842_adapter *adapter = netdev_priv(netdev);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5
R		 584 struct sockaddr *addr = p;
585 char *mac = (u8 *)addr->sa_data;
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 586
a99db196 587 netdev_dbg(netdev, "%s: entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5
R		 588
589 if (!is_valid_ether_addr(addr->sa_data))
590 return -EADDRNOTAVAIL;
591
592 memcpy(netdev->dev_addr, mac, netdev->addr_len);
593
a1aa8822 594 ks8842_write_mac_addr(adapter, mac);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="8">b07878e5
R		 595 return 0;
596}
597
598static void ks8842_tx_timeout(struct net_device *netdev)
599{
600 struct ks8842_adapter *adapter = netdev_priv(netdev);
601 unsigned long flags;
602
a99db196 603 netdev_dbg(netdev, "%s: entry\n", __func__);
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5
R		 604
605 spin_lock_irqsave(&adapter->lock, flags);
606 /* disable interrupts */
607 ks8842_write16(adapter, 18, 0, REG_IER);
608 ks8842_write16(adapter, 18, 0xFFFF, REG_ISR);
609 spin_unlock_irqrestore(&adapter->lock, flags);
610
611 ks8842_reset_hw(adapter);
612
a1aa8822
RR		 613 ks8842_write_mac_addr(adapter, netdev->dev_addr);
614
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5
R		 615 ks8842_update_link_status(netdev, adapter);
616}
617
618static const struct net_device_ops ks8842_netdev_ops = {
619 .ndo_open = ks8842_open,
620 .ndo_stop = ks8842_close,
621 .ndo_start_xmit = ks8842_xmit_frame,
622 .ndo_set_mac_address = ks8842_set_mac,
623 .ndo_tx_timeout = ks8842_tx_timeout,
624 .ndo_validate_addr = eth_validate_addr
625};
626
0fc0b732 627static const struct ethtool_ops ks8842_ethtool_ops = {
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5
R		 628 .get_link = ethtool_op_get_link,
629};
630
631static int __devinit ks8842_probe(struct platform_device *pdev)
632{
633 int err = -ENOMEM;
634 struct resource *iomem;
635 struct net_device *netdev;
636 struct ks8842_adapter *adapter;
a1aa8822 637 struct ks8842_platform_data *pdata = pdev->dev.platform_data;
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 638 u16 id;
a1aa8822 639 unsigned i;
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="22">b07878e5
R		 640
641 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
642 if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
643 goto err_mem_region;
644
645 netdev = alloc_etherdev(sizeof(struct ks8842_adapter));
646 if (!netdev)
647 goto err_alloc_etherdev;
648
649 SET_NETDEV_DEV(netdev, &pdev->dev);
650
651 adapter = netdev_priv(netdev);
652 adapter->hw_addr = ioremap(iomem->start, resource_size(iomem));
653 if (!adapter->hw_addr)
654 goto err_ioremap;
655
656 adapter->irq = platform_get_irq(pdev, 0);
657 if (adapter->irq < 0) {
658 err = adapter->irq;
659 goto err_get_irq;
660 }
661
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5
R		 662 tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev);
663 spin_lock_init(&adapter->lock);
664
665 netdev->netdev_ops = &ks8842_netdev_ops;
666 netdev->ethtool_ops = &ks8842_ethtool_ops;
667
a1aa8822
RR		 668 /* Check if a mac address was given */
669 i = netdev->addr_len;
670 if (pdata) {
671 for (i = 0; i < netdev->addr_len; i++)
672 if (pdata->macaddr[i] != 0)
673 break;
674
675 if (i < netdev->addr_len)
676 /* an address was passed, use it */
677 memcpy(netdev->dev_addr, pdata->macaddr,
678 netdev->addr_len);
679 }
680
681 if (i == netdev->addr_len) {
682 ks8842_read_mac_addr(adapter, netdev->dev_addr);
683
684 if (!is_valid_ether_addr(netdev->dev_addr))
685 random_ether_addr(netdev->dev_addr);
686 }
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="10">b07878e5
R		 687
688 id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
689
690 strcpy(netdev->name, "eth%d");
691 err = register_netdev(netdev);
692 if (err)
693 goto err_register;
694
695 platform_set_drvdata(pdev, netdev);
696
0dc7d2b3 697 pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n",
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="58">b07878e5
R		 698 (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7);
699
700 return 0;
701
702err_register:
703err_get_irq:
704 iounmap(adapter->hw_addr);
705err_ioremap:
706 free_netdev(netdev);
707err_alloc_etherdev:
708 release_mem_region(iomem->start, resource_size(iomem));
709err_mem_region:
710 return err;
711}
712
713static int __devexit ks8842_remove(struct platform_device *pdev)
714{
715 struct net_device *netdev = platform_get_drvdata(pdev);
716 struct ks8842_adapter *adapter = netdev_priv(netdev);
717 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
718
719 unregister_netdev(netdev);
720 tasklet_kill(&adapter->tasklet);
721 iounmap(adapter->hw_addr);
722 free_netdev(netdev);
723 release_mem_region(iomem->start, resource_size(iomem));
724 platform_set_drvdata(pdev, NULL);
725 return 0;
726}
727
728
729static struct platform_driver ks8842_platform_driver = {
730 .driver = {
731 .name = DRV_NAME,
732 .owner = THIS_MODULE,
733 },
734 .probe = ks8842_probe,
735 .remove = ks8842_remove,
736};
737
738static int __init ks8842_init(void)
739{
740 return platform_driver_register(&ks8842_platform_driver);
741}
742
743static void __exit ks8842_exit(void)
744{
745 platform_driver_unregister(&ks8842_platform_driver);
746}
747
748module_init(ks8842_init);
749module_exit(ks8842_exit);
750
751MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver");
752MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
753MODULE_LICENSE("GPL v2");
754MODULE_ALIAS("platform:ks8842");
755
Linux 6.x block layer and io_uring tree(s)