Commit | Line | Data |
---|---|---|
\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="276">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 | ||
117 | struct ks8842_adapter { | |
118 | void __iomem *hw_addr; | |
119 | int irq; | |
120 | struct tasklet_struct tasklet; | |
121 | spinlock_t lock; /* spinlock to be interrupt safe */ | |
122 | struct platform_device *pdev; | |
123 | }; | |
124 | ||
125 | static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank) | |
126 | { | |
127 | iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK); | |
128 | } | |
129 | ||
130 | static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank, | |
131 | u8 value, int offset) | |
132 | { | |
133 | ks8842_select_bank(adapter, bank); | |
134 | iowrite8(value, adapter->hw_addr + offset); | |
135 | } | |
136 | ||
137 | static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank, | |
138 | u16 value, int offset) | |
139 | { | |
140 | ks8842_select_bank(adapter, bank); | |
141 | iowrite16(value, adapter->hw_addr + offset); | |
142 | } | |
143 | ||
144 | static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank, | |
145 | u16 bits, int offset) | |
146 | { | |
147 | u16 reg; | |
148 | ks8842_select_bank(adapter, bank); | |
149 | reg = ioread16(adapter->hw_addr + offset); | |
150 | reg |= bits; | |
151 | iowrite16(reg, adapter->hw_addr + offset); | |
152 | } | |
153 | ||
154 | static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank, | |
155 | u16 bits, int offset) | |
156 | { | |
157 | u16 reg; | |
158 | ks8842_select_bank(adapter, bank); | |
159 | reg = ioread16(adapter->hw_addr + offset); | |
160 | reg &= ~bits; | |
161 | iowrite16(reg, adapter->hw_addr + offset); | |
162 | } | |
163 | ||
164 | static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank, | |
165 | u32 value, int offset) | |
166 | { | |
167 | ks8842_select_bank(adapter, bank); | |
168 | iowrite32(value, adapter->hw_addr + offset); | |
169 | } | |
170 | ||
171 | static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank, | |
172 | int offset) | |
173 | { | |
174 | ks8842_select_bank(adapter, bank); | |
175 | return ioread8(adapter->hw_addr + offset); | |
176 | } | |
177 | ||
178 | static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank, | |
179 | int offset) | |
180 | { | |
181 | ks8842_select_bank(adapter, bank); | |
182 | return ioread16(adapter->hw_addr + offset); | |
183 | } | |
184 | ||
185 | static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, | |
186 | int offset) | |
187 | { | |
188 | ks8842_select_bank(adapter, bank); | |
189 | return ioread32(adapter->hw_addr + offset); | |
190 | } | |
191 | ||
192 | static void ks8842_reset(struct ks8842_adapter *adapter) | |
193 | { | |
194 | /* The KS8842 goes haywire when doing softare reset | |
195 | * a work around in the timberdale IP is implemented to | |
196 | * do a hardware reset instead | |
197 | ks8842_write16(adapter, 3, 1, REG_GRR); | |
198 | msleep(10); | |
199 | iowrite16(0, adapter->hw_addr + REG_GRR); | |
200 | */ | |
201 | iowrite16(32, adapter->hw_addr + REG_SELECT_BANK); | |
202 | iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); | |
203 | msleep(20); | |
204 | } | |
205 | ||
206 | static void ks8842_update_link_status(struct net_device *netdev, | |
207 | struct ks8842_adapter *adapter) | |
208 | { | |
209 | /* check the status of the link */ | |
210 | if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) { | |
211 | netif_carrier_on(netdev); | |
212 | netif_wake_queue(netdev); | |
213 | } else { | |
214 | netif_stop_queue(netdev); | |
215 | netif_carrier_off(netdev); | |
216 | } | |
217 | } | |
218 | ||
219 | static void ks8842_enable_tx(struct ks8842_adapter *adapter) | |
220 | { | |
221 | ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR); | |
222 | } | |
223 | ||
224 | static void ks8842_disable_tx(struct ks8842_adapter *adapter) | |
225 | { | |
226 | ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR); | |
227 | } | |
228 | ||
229 | static void ks8842_enable_rx(struct ks8842_adapter *adapter) | |
230 | { | |
231 | ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR); | |
232 | } | |
233 | ||
234 | static void ks8842_disable_rx(struct ks8842_adapter *adapter) | |
235 | { | |
236 | ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR); | |
237 | } | |
238 | ||
239 | static void ks8842_reset_hw(struct ks8842_adapter *adapter) | |
240 | { | |
241 | /* reset the HW */ | |
242 | ks8842_reset(adapter); | |
243 | ||
244 | /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */ | |
245 | ks8842_write16(adapter, 16, 0x000E, REG_TXCR); | |
246 | ||
247 | /* enable the receiver, uni + multi + broadcast + flow ctrl | |
248 | + crc strip */ | |
249 | ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400, | |
250 | REG_RXCR); | |
251 | ||
252 | /* TX frame pointer autoincrement */ | |
253 | ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR); | |
254 | ||
255 | /* RX frame pointer autoincrement */ | |
256 | ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR); | |
257 | ||
258 | /* RX 2 kb high watermark */ | |
259 | ks8842_write16(adapter, 0, 0x1000, REG_QRFCR); | |
260 | ||
261 | /* aggresive back off in half duplex */ | |
262 | ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1); | |
263 | ||
264 | /* enable no excessive collison drop */ | |
265 | ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2); | |
266 | ||
267 | /* Enable port 1 force flow control / back pressure / transmit / recv */ | |
268 | ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2); | |
269 | ||
270 | /* restart port auto-negotiation */ | |
271 | ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); | |
272 | /* only advertise 10Mbps */ | |
273 | ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4); | |
274 | ||
275 | /* Enable the transmitter */ | |
276 | ks8842_enable_tx(adapter); | |
277 | ||
278 | /* Enable the receiver */ | |
279 | ks8842_enable_rx(adapter); | |
280 | ||
281 | /* clear all interrupts */ | |
282 | ks8842_write16(adapter, 18, 0xffff, REG_ISR); | |
283 | ||
284 | /* enable interrupts */ | |
285 | ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); | |
286 | ||
287 | /* enable the switch */ | |
288 | ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE); | |
289 | } | |
290 | ||
291 | static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) | |
292 | { | |
293 | int i; | |
294 | u16 mac; | |
295 | ||
296 | for (i = 0; i < ETH_ALEN; i++) | |
297 | dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); | |
298 | ||
299 | /* make sure the switch port uses the same MAC as the QMU */ | |
300 | mac = ks8842_read16(adapter, 2, REG_MARL); | |
301 | ks8842_write16(adapter, 39, mac, REG_MACAR1); | |
302 | mac = ks8842_read16(adapter, 2, REG_MARM); | |
303 | ks8842_write16(adapter, 39, mac, REG_MACAR2); | |
304 | mac = ks8842_read16(adapter, 2, REG_MARH); | |
305 | ks8842_write16(adapter, 39, mac, REG_MACAR3); | |
306 | } | |
307 | ||
a1aa8822 RR |
308 | static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) |
309 | { | |
310 | unsigned long flags; | |
311 | unsigned i; | |
312 | ||
313 | spin_lock_irqsave(&adapter->lock, flags); | |
314 | for (i = 0; i < ETH_ALEN; i++) { | |
315 | ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); | |
316 | ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], | |
317 | REG_MACAR1 + i); | |
318 | } | |
319 | spin_unlock_irqrestore(&adapter->lock, flags); | |
320 | } | |
321 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="55">b07878e5 R |
322 | static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter) |
323 | { | |
324 | return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff; | |
325 | } | |
326 | ||
327 | static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) | |
328 | { | |
329 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
330 | int len = skb->len; | |
331 | u32 *ptr = (u32 *)skb->data; | |
332 | u32 ctrl; | |
333 | ||
334 | dev_dbg(&adapter->pdev->dev, | |
335 | "%s: len %u head %p data %p tail %p end %p\n", | |
336 | __func__, skb->len, skb->head, skb->data, | |
337 | skb_tail_pointer(skb), skb_end_pointer(skb)); | |
338 | ||
339 | /* check FIFO buffer space, we need space for CRC and command bits */ | |
340 | if (ks8842_tx_fifo_space(adapter) < len + 8) | |
341 | return NETDEV_TX_BUSY; | |
342 | ||
343 | /* the control word, enable IRQ, port 1 and the length */ | |
344 | ctrl = 0x8000 | 0x100 | (len << 16); | |
345 | ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); | |
346 | ||
347 | netdev->stats.tx_bytes += len; | |
348 | ||
349 | /* copy buffer */ | |
350 | while (len > 0) { | |
351 | iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); | |
352 | len -= sizeof(u32); | |
353 | ptr++; | |
354 | } | |
355 | ||
356 | /* enqueue packet */ | |
357 | ks8842_write16(adapter, 17, 1, REG_TXQCR); | |
358 | ||
359 | dev_kfree_skb(skb); | |
360 | ||
361 | return NETDEV_TX_OK; | |
362 | } | |
363 | ||
364 | static void ks8842_rx_frame(struct net_device *netdev, | |
365 | struct ks8842_adapter *adapter) | |
366 | { | |
367 | u32 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); | |
368 | int len = (status >> 16) & 0x7ff; | |
369 | ||
370 | status &= 0xffff; | |
371 | ||
372 | dev_dbg(&adapter->pdev->dev, "%s - rx_data: status: %x\n", | |
373 | __func__, status); | |
374 | ||
375 | /* check the status */ | |
376 | if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { | |
89d71a66 | 377 | struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="11">b07878e5 R |
378 | |
379 | dev_dbg(&adapter->pdev->dev, "%s, got package, len: %d\n", | |
380 | __func__, len); | |
381 | if (skb) { | |
382 | u32 *data; | |
383 | ||
384 | netdev->stats.rx_packets++; | |
385 | netdev->stats.rx_bytes += len; | |
386 | if (status & RXSR_MULTICAST) | |
387 | netdev->stats.multicast++; | |
388 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="151">b07878e5 R |
389 | data = (u32 *)skb_put(skb, len); |
390 | ||
391 | ks8842_select_bank(adapter, 17); | |
392 | while (len > 0) { | |
393 | *data++ = ioread32(adapter->hw_addr + | |
394 | REG_QMU_DATA_LO); | |
395 | len -= sizeof(u32); | |
396 | } | |
397 | ||
398 | skb->protocol = eth_type_trans(skb, netdev); | |
399 | netif_rx(skb); | |
400 | } else | |
401 | netdev->stats.rx_dropped++; | |
402 | } else { | |
403 | dev_dbg(&adapter->pdev->dev, "RX error, status: %x\n", status); | |
404 | netdev->stats.rx_errors++; | |
405 | if (status & RXSR_TOO_LONG) | |
406 | netdev->stats.rx_length_errors++; | |
407 | if (status & RXSR_CRC_ERROR) | |
408 | netdev->stats.rx_crc_errors++; | |
409 | if (status & RXSR_RUNT) | |
410 | netdev->stats.rx_frame_errors++; | |
411 | } | |
412 | ||
413 | /* set high watermark to 3K */ | |
414 | ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR); | |
415 | ||
416 | /* release the frame */ | |
417 | ks8842_write16(adapter, 17, 0x01, REG_RXQCR); | |
418 | ||
419 | /* set high watermark to 2K */ | |
420 | ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR); | |
421 | } | |
422 | ||
423 | void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter) | |
424 | { | |
425 | u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; | |
426 | dev_dbg(&adapter->pdev->dev, "%s Entry - rx_data: %d\n", | |
427 | __func__, rx_data); | |
428 | while (rx_data) { | |
429 | ks8842_rx_frame(netdev, adapter); | |
430 | rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; | |
431 | } | |
432 | } | |
433 | ||
434 | void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter) | |
435 | { | |
436 | u16 sr = ks8842_read16(adapter, 16, REG_TXSR); | |
437 | dev_dbg(&adapter->pdev->dev, "%s - entry, sr: %x\n", __func__, sr); | |
438 | netdev->stats.tx_packets++; | |
439 | if (netif_queue_stopped(netdev)) | |
440 | netif_wake_queue(netdev); | |
441 | } | |
442 | ||
443 | void ks8842_handle_rx_overrun(struct net_device *netdev, | |
444 | struct ks8842_adapter *adapter) | |
445 | { | |
446 | dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__); | |
447 | netdev->stats.rx_errors++; | |
448 | netdev->stats.rx_fifo_errors++; | |
449 | } | |
450 | ||
451 | void ks8842_tasklet(unsigned long arg) | |
452 | { | |
453 | struct net_device *netdev = (struct net_device *)arg; | |
454 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
455 | u16 isr; | |
456 | unsigned long flags; | |
457 | u16 entry_bank; | |
458 | ||
459 | /* read current bank to be able to set it back */ | |
460 | spin_lock_irqsave(&adapter->lock, flags); | |
461 | entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); | |
462 | spin_unlock_irqrestore(&adapter->lock, flags); | |
463 | ||
464 | isr = ks8842_read16(adapter, 18, REG_ISR); | |
465 | dev_dbg(&adapter->pdev->dev, "%s - ISR: 0x%x\n", __func__, isr); | |
466 | ||
467 | /* Ack */ | |
468 | ks8842_write16(adapter, 18, isr, REG_ISR); | |
469 | ||
470 | if (!netif_running(netdev)) | |
471 | return; | |
472 | ||
473 | if (isr & IRQ_LINK_CHANGE) | |
474 | ks8842_update_link_status(netdev, adapter); | |
475 | ||
476 | if (isr & (IRQ_RX | IRQ_RX_ERROR)) | |
477 | ks8842_handle_rx(netdev, adapter); | |
478 | ||
479 | if (isr & IRQ_TX) | |
480 | ks8842_handle_tx(netdev, adapter); | |
481 | ||
482 | if (isr & IRQ_RX_OVERRUN) | |
483 | ks8842_handle_rx_overrun(netdev, adapter); | |
484 | ||
485 | if (isr & IRQ_TX_STOPPED) { | |
486 | ks8842_disable_tx(adapter); | |
487 | ks8842_enable_tx(adapter); | |
488 | } | |
489 | ||
490 | if (isr & IRQ_RX_STOPPED) { | |
491 | ks8842_disable_rx(adapter); | |
492 | ks8842_enable_rx(adapter); | |
493 | } | |
494 | ||
495 | /* re-enable interrupts, put back the bank selection register */ | |
496 | spin_lock_irqsave(&adapter->lock, flags); | |
497 | ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); | |
498 | iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); | |
499 | spin_unlock_irqrestore(&adapter->lock, flags); | |
500 | } | |
501 | ||
502 | static irqreturn_t ks8842_irq(int irq, void *devid) | |
503 | { | |
504 | struct ks8842_adapter *adapter = devid; | |
505 | u16 isr; | |
506 | u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); | |
507 | irqreturn_t ret = IRQ_NONE; | |
508 | ||
509 | isr = ks8842_read16(adapter, 18, REG_ISR); | |
510 | dev_dbg(&adapter->pdev->dev, "%s - ISR: 0x%x\n", __func__, isr); | |
511 | ||
512 | if (isr) { | |
513 | /* disable IRQ */ | |
514 | ks8842_write16(adapter, 18, 0x00, REG_IER); | |
515 | ||
516 | /* schedule tasklet */ | |
517 | tasklet_schedule(&adapter->tasklet); | |
518 | ||
519 | ret = IRQ_HANDLED; | |
520 | } | |
521 | ||
522 | iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
527 | ||
528 | /* Netdevice operations */ | |
529 | ||
530 | static int ks8842_open(struct net_device *netdev) | |
531 | { | |
532 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
533 | int err; | |
534 | ||
535 | dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__); | |
536 | ||
537 | /* reset the HW */ | |
538 | ks8842_reset_hw(adapter); | |
539 | ||
a1aa8822 RR |
540 | ks8842_write_mac_addr(adapter, netdev->dev_addr); |
541 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="5">b07878e5 R |
542 | ks8842_update_link_status(netdev, adapter); |
543 | ||
544 | err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME, | |
545 | adapter); | |
546 | if (err) { | |
0dc7d2b3 | 547 | pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="21">b07878e5 R |
548 | return err; |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int ks8842_close(struct net_device *netdev) | |
555 | { | |
556 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
557 | ||
558 | dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__); | |
559 | ||
560 | /* free the irq */ | |
561 | free_irq(adapter->irq, adapter); | |
562 | ||
563 | /* disable the switch */ | |
564 | ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
61357325 SH |
569 | static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb, |
570 | struct net_device *netdev) | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="17">b07878e5 R |
571 | { |
572 | int ret; | |
573 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
574 | ||
575 | dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__); | |
576 | ||
577 | ret = ks8842_tx_frame(skb, netdev); | |
578 | ||
579 | if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8) | |
580 | netif_stop_queue(netdev); | |
581 | ||
582 | return ret; | |
583 | } | |
584 | ||
585 | static int ks8842_set_mac(struct net_device *netdev, void *p) | |
586 | { | |
587 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
588 | struct sockaddr *addr = p; |
589 | char *mac = (u8 *)addr->sa_data; | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="8">b07878e5 R |
590 | |
591 | dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__); | |
592 | ||
593 | if (!is_valid_ether_addr(addr->sa_data)) | |
594 | return -EADDRNOTAVAIL; | |
595 | ||
596 | memcpy(netdev->dev_addr, mac, netdev->addr_len); | |
597 | ||
a1aa8822 | 598 | ks8842_write_mac_addr(adapter, mac); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="18">b07878e5 R |
599 | return 0; |
600 | } | |
601 | ||
602 | static void ks8842_tx_timeout(struct net_device *netdev) | |
603 | { | |
604 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
605 | unsigned long flags; | |
606 | ||
607 | dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__); | |
608 | ||
609 | spin_lock_irqsave(&adapter->lock, flags); | |
610 | /* disable interrupts */ | |
611 | ks8842_write16(adapter, 18, 0, REG_IER); | |
612 | ks8842_write16(adapter, 18, 0xFFFF, REG_ISR); | |
613 | spin_unlock_irqrestore(&adapter->lock, flags); | |
614 | ||
615 | ks8842_reset_hw(adapter); | |
616 | ||
a1aa8822 RR |
617 | ks8842_write_mac_addr(adapter, netdev->dev_addr); |
618 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5 R |
619 | ks8842_update_link_status(netdev, adapter); |
620 | } | |
621 | ||
622 | static const struct net_device_ops ks8842_netdev_ops = { | |
623 | .ndo_open = ks8842_open, | |
624 | .ndo_stop = ks8842_close, | |
625 | .ndo_start_xmit = ks8842_xmit_frame, | |
626 | .ndo_set_mac_address = ks8842_set_mac, | |
627 | .ndo_tx_timeout = ks8842_tx_timeout, | |
628 | .ndo_validate_addr = eth_validate_addr | |
629 | }; | |
630 | ||
0fc0b732 | 631 | static const struct ethtool_ops ks8842_ethtool_ops = { |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
632 | .get_link = ethtool_op_get_link, |
633 | }; | |
634 | ||
635 | static int __devinit ks8842_probe(struct platform_device *pdev) | |
636 | { | |
637 | int err = -ENOMEM; | |
638 | struct resource *iomem; | |
639 | struct net_device *netdev; | |
640 | struct ks8842_adapter *adapter; | |
a1aa8822 | 641 | struct ks8842_platform_data *pdata = pdev->dev.platform_data; |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 642 | u16 id; |
a1aa8822 | 643 | unsigned i; |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="30">b07878e5 R |
644 | |
645 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
646 | if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) | |
647 | goto err_mem_region; | |
648 | ||
649 | netdev = alloc_etherdev(sizeof(struct ks8842_adapter)); | |
650 | if (!netdev) | |
651 | goto err_alloc_etherdev; | |
652 | ||
653 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
654 | ||
655 | adapter = netdev_priv(netdev); | |
656 | adapter->hw_addr = ioremap(iomem->start, resource_size(iomem)); | |
657 | if (!adapter->hw_addr) | |
658 | goto err_ioremap; | |
659 | ||
660 | adapter->irq = platform_get_irq(pdev, 0); | |
661 | if (adapter->irq < 0) { | |
662 | err = adapter->irq; | |
663 | goto err_get_irq; | |
664 | } | |
665 | ||
666 | adapter->pdev = pdev; | |
667 | ||
668 | tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev); | |
669 | spin_lock_init(&adapter->lock); | |
670 | ||
671 | netdev->netdev_ops = &ks8842_netdev_ops; | |
672 | netdev->ethtool_ops = &ks8842_ethtool_ops; | |
673 | ||
a1aa8822 RR |
674 | /* Check if a mac address was given */ |
675 | i = netdev->addr_len; | |
676 | if (pdata) { | |
677 | for (i = 0; i < netdev->addr_len; i++) | |
678 | if (pdata->macaddr[i] != 0) | |
679 | break; | |
680 | ||
681 | if (i < netdev->addr_len) | |
682 | /* an address was passed, use it */ | |
683 | memcpy(netdev->dev_addr, pdata->macaddr, | |
684 | netdev->addr_len); | |
685 | } | |
686 | ||
687 | if (i == netdev->addr_len) { | |
688 | ks8842_read_mac_addr(adapter, netdev->dev_addr); | |
689 | ||
690 | if (!is_valid_ether_addr(netdev->dev_addr)) | |
691 | random_ether_addr(netdev->dev_addr); | |
692 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="10">b07878e5 R |
693 | |
694 | id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE); | |
695 | ||
696 | strcpy(netdev->name, "eth%d"); | |
697 | err = register_netdev(netdev); | |
698 | if (err) | |
699 | goto err_register; | |
700 | ||
701 | platform_set_drvdata(pdev, netdev); | |
702 | ||
0dc7d2b3 | 703 | 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 |
704 | (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); |
705 | ||
706 | return 0; | |
707 | ||
708 | err_register: | |
709 | err_get_irq: | |
710 | iounmap(adapter->hw_addr); | |
711 | err_ioremap: | |
712 | free_netdev(netdev); | |
713 | err_alloc_etherdev: | |
714 | release_mem_region(iomem->start, resource_size(iomem)); | |
715 | err_mem_region: | |
716 | return err; | |
717 | } | |
718 | ||
719 | static int __devexit ks8842_remove(struct platform_device *pdev) | |
720 | { | |
721 | struct net_device *netdev = platform_get_drvdata(pdev); | |
722 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
723 | struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
724 | ||
725 | unregister_netdev(netdev); | |
726 | tasklet_kill(&adapter->tasklet); | |
727 | iounmap(adapter->hw_addr); | |
728 | free_netdev(netdev); | |
729 | release_mem_region(iomem->start, resource_size(iomem)); | |
730 | platform_set_drvdata(pdev, NULL); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | ||
735 | static struct platform_driver ks8842_platform_driver = { | |
736 | .driver = { | |
737 | .name = DRV_NAME, | |
738 | .owner = THIS_MODULE, | |
739 | }, | |
740 | .probe = ks8842_probe, | |
741 | .remove = ks8842_remove, | |
742 | }; | |
743 | ||
744 | static int __init ks8842_init(void) | |
745 | { | |
746 | return platform_driver_register(&ks8842_platform_driver); | |
747 | } | |
748 | ||
749 | static void __exit ks8842_exit(void) | |
750 | { | |
751 | platform_driver_unregister(&ks8842_platform_driver); | |
752 | } | |
753 | ||
754 | module_init(ks8842_init); | |
755 | module_exit(ks8842_exit); | |
756 | ||
757 | MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver"); | |
758 | MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); | |
759 | MODULE_LICENSE("GPL v2"); | |
760 | MODULE_ALIAS("platform:ks8842"); | |
761 |