Commit | Line | Data |
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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="18">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 | |
28bd620c | 21 | * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
22 | */ |
23 | ||
0dc7d2b3 JP |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5 R |
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> | |
a1aa8822 | 32 | #include <linux/ks8842.h> |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5 R |
33 | |
34 | #define DRV_NAME "ks8842" | |
35 | ||
36 | /* Timberdale specific Registers */ | |
db5824dd RR |
37 | #define REG_TIMB_RST 0x1c |
38 | #define REG_TIMB_FIFO 0x20 | |
39 | #define REG_TIMB_ISR 0x24 | |
40 | #define REG_TIMB_IER 0x28 | |
41 | #define REG_TIMB_IAR 0x2C | |
42 | #define REQ_TIMB_DMA_RESUME 0x30 | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="80">b07878e5 R |
43 | |
44 | /* KS8842 registers */ | |
45 | ||
46 | #define REG_SELECT_BANK 0x0e | |
47 | ||
48 | /* bank 0 registers */ | |
49 | #define REG_QRFCR 0x04 | |
50 | ||
51 | /* bank 2 registers */ | |
52 | #define REG_MARL 0x00 | |
53 | #define REG_MARM 0x02 | |
54 | #define REG_MARH 0x04 | |
55 | ||
56 | /* bank 3 registers */ | |
57 | #define REG_GRR 0x06 | |
58 | ||
59 | /* bank 16 registers */ | |
60 | #define REG_TXCR 0x00 | |
61 | #define REG_TXSR 0x02 | |
62 | #define REG_RXCR 0x04 | |
63 | #define REG_TXMIR 0x08 | |
64 | #define REG_RXMIR 0x0A | |
65 | ||
66 | /* bank 17 registers */ | |
67 | #define REG_TXQCR 0x00 | |
68 | #define REG_RXQCR 0x02 | |
69 | #define REG_TXFDPR 0x04 | |
70 | #define REG_RXFDPR 0x06 | |
71 | #define REG_QMU_DATA_LO 0x08 | |
72 | #define REG_QMU_DATA_HI 0x0A | |
73 | ||
74 | /* bank 18 registers */ | |
75 | #define REG_IER 0x00 | |
76 | #define IRQ_LINK_CHANGE 0x8000 | |
77 | #define IRQ_TX 0x4000 | |
78 | #define IRQ_RX 0x2000 | |
79 | #define IRQ_RX_OVERRUN 0x0800 | |
80 | #define IRQ_TX_STOPPED 0x0200 | |
81 | #define IRQ_RX_STOPPED 0x0100 | |
82 | #define IRQ_RX_ERROR 0x0080 | |
83 | #define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \ | |
84 | IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) | |
85 | #define REG_ISR 0x02 | |
86 | #define REG_RXSR 0x04 | |
87 | #define RXSR_VALID 0x8000 | |
88 | #define RXSR_BROADCAST 0x80 | |
89 | #define RXSR_MULTICAST 0x40 | |
90 | #define RXSR_UNICAST 0x20 | |
91 | #define RXSR_FRAMETYPE 0x08 | |
92 | #define RXSR_TOO_LONG 0x04 | |
93 | #define RXSR_RUNT 0x02 | |
94 | #define RXSR_CRC_ERROR 0x01 | |
95 | #define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR) | |
96 | ||
97 | /* bank 32 registers */ | |
98 | #define REG_SW_ID_AND_ENABLE 0x00 | |
99 | #define REG_SGCR1 0x02 | |
100 | #define REG_SGCR2 0x04 | |
101 | #define REG_SGCR3 0x06 | |
102 | ||
103 | /* bank 39 registers */ | |
104 | #define REG_MACAR1 0x00 | |
105 | #define REG_MACAR2 0x02 | |
106 | #define REG_MACAR3 0x04 | |
107 | ||
108 | /* bank 45 registers */ | |
109 | #define REG_P1MBCR 0x00 | |
110 | #define REG_P1MBSR 0x02 | |
111 | ||
112 | /* bank 46 registers */ | |
113 | #define REG_P2MBCR 0x00 | |
114 | #define REG_P2MBSR 0x02 | |
115 | ||
116 | /* bank 48 registers */ | |
117 | #define REG_P1CR2 0x02 | |
118 | ||
119 | /* bank 49 registers */ | |
120 | #define REG_P1CR4 0x02 | |
121 | #define REG_P1SR 0x04 | |
122 | ||
28bd620c DC |
123 | /* flags passed by platform_device for configuration */ |
124 | #define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */ | |
125 | #define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */ | |
126 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5 R |
127 | struct ks8842_adapter { |
128 | void __iomem *hw_addr; | |
129 | int irq; | |
28bd620c | 130 | unsigned long conf_flags; /* copy of platform_device config */ |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
131 | struct tasklet_struct tasklet; |
132 | spinlock_t lock; /* spinlock to be interrupt safe */ | |
cc88e450 RR |
133 | struct work_struct timeout_work; |
134 | struct net_device *netdev; | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="71">b07878e5 R |
135 | }; |
136 | ||
137 | static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank) | |
138 | { | |
139 | iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK); | |
140 | } | |
141 | ||
142 | static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank, | |
143 | u8 value, int offset) | |
144 | { | |
145 | ks8842_select_bank(adapter, bank); | |
146 | iowrite8(value, adapter->hw_addr + offset); | |
147 | } | |
148 | ||
149 | static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank, | |
150 | u16 value, int offset) | |
151 | { | |
152 | ks8842_select_bank(adapter, bank); | |
153 | iowrite16(value, adapter->hw_addr + offset); | |
154 | } | |
155 | ||
156 | static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank, | |
157 | u16 bits, int offset) | |
158 | { | |
159 | u16 reg; | |
160 | ks8842_select_bank(adapter, bank); | |
161 | reg = ioread16(adapter->hw_addr + offset); | |
162 | reg |= bits; | |
163 | iowrite16(reg, adapter->hw_addr + offset); | |
164 | } | |
165 | ||
166 | static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank, | |
167 | u16 bits, int offset) | |
168 | { | |
169 | u16 reg; | |
170 | ks8842_select_bank(adapter, bank); | |
171 | reg = ioread16(adapter->hw_addr + offset); | |
172 | reg &= ~bits; | |
173 | iowrite16(reg, adapter->hw_addr + offset); | |
174 | } | |
175 | ||
176 | static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank, | |
177 | u32 value, int offset) | |
178 | { | |
179 | ks8842_select_bank(adapter, bank); | |
180 | iowrite32(value, adapter->hw_addr + offset); | |
181 | } | |
182 | ||
183 | static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank, | |
184 | int offset) | |
185 | { | |
186 | ks8842_select_bank(adapter, bank); | |
187 | return ioread8(adapter->hw_addr + offset); | |
188 | } | |
189 | ||
190 | static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank, | |
191 | int offset) | |
192 | { | |
193 | ks8842_select_bank(adapter, bank); | |
194 | return ioread16(adapter->hw_addr + offset); | |
195 | } | |
196 | ||
197 | static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, | |
198 | int offset) | |
199 | { | |
200 | ks8842_select_bank(adapter, bank); | |
201 | return ioread32(adapter->hw_addr + offset); | |
202 | } | |
203 | ||
204 | static void ks8842_reset(struct ks8842_adapter *adapter) | |
205 | { | |
28bd620c DC |
206 | if (adapter->conf_flags & MICREL_KS884X) { |
207 | ks8842_write16(adapter, 3, 1, REG_GRR); | |
208 | msleep(10); | |
209 | iowrite16(0, adapter->hw_addr + REG_GRR); | |
210 | } else { | |
211 | /* The KS8842 goes haywire when doing softare reset | |
212 | * a work around in the timberdale IP is implemented to | |
213 | * do a hardware reset instead | |
214 | ks8842_write16(adapter, 3, 1, REG_GRR); | |
215 | msleep(10); | |
216 | iowrite16(0, adapter->hw_addr + REG_GRR); | |
217 | */ | |
218 | iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); | |
219 | msleep(20); | |
220 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="68">b07878e5 R |
221 | } |
222 | ||
223 | static void ks8842_update_link_status(struct net_device *netdev, | |
224 | struct ks8842_adapter *adapter) | |
225 | { | |
226 | /* check the status of the link */ | |
227 | if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) { | |
228 | netif_carrier_on(netdev); | |
229 | netif_wake_queue(netdev); | |
230 | } else { | |
231 | netif_stop_queue(netdev); | |
232 | netif_carrier_off(netdev); | |
233 | } | |
234 | } | |
235 | ||
236 | static void ks8842_enable_tx(struct ks8842_adapter *adapter) | |
237 | { | |
238 | ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR); | |
239 | } | |
240 | ||
241 | static void ks8842_disable_tx(struct ks8842_adapter *adapter) | |
242 | { | |
243 | ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR); | |
244 | } | |
245 | ||
246 | static void ks8842_enable_rx(struct ks8842_adapter *adapter) | |
247 | { | |
248 | ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR); | |
249 | } | |
250 | ||
251 | static void ks8842_disable_rx(struct ks8842_adapter *adapter) | |
252 | { | |
253 | ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR); | |
254 | } | |
255 | ||
256 | static void ks8842_reset_hw(struct ks8842_adapter *adapter) | |
257 | { | |
258 | /* reset the HW */ | |
259 | ks8842_reset(adapter); | |
260 | ||
261 | /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */ | |
262 | ks8842_write16(adapter, 16, 0x000E, REG_TXCR); | |
263 | ||
264 | /* enable the receiver, uni + multi + broadcast + flow ctrl | |
265 | + crc strip */ | |
266 | ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400, | |
267 | REG_RXCR); | |
268 | ||
269 | /* TX frame pointer autoincrement */ | |
270 | ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR); | |
271 | ||
272 | /* RX frame pointer autoincrement */ | |
273 | ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR); | |
274 | ||
275 | /* RX 2 kb high watermark */ | |
276 | ks8842_write16(adapter, 0, 0x1000, REG_QRFCR); | |
277 | ||
278 | /* aggresive back off in half duplex */ | |
279 | ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1); | |
280 | ||
281 | /* enable no excessive collison drop */ | |
282 | ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2); | |
283 | ||
284 | /* Enable port 1 force flow control / back pressure / transmit / recv */ | |
285 | ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2); | |
286 | ||
287 | /* restart port auto-negotiation */ | |
288 | ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); | |
28bd620c | 289 | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="24">b07878e5 R |
290 | /* Enable the transmitter */ |
291 | ks8842_enable_tx(adapter); | |
292 | ||
293 | /* Enable the receiver */ | |
294 | ks8842_enable_rx(adapter); | |
295 | ||
296 | /* clear all interrupts */ | |
297 | ks8842_write16(adapter, 18, 0xffff, REG_ISR); | |
298 | ||
299 | /* enable interrupts */ | |
300 | ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); | |
301 | ||
302 | /* enable the switch */ | |
303 | ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE); | |
304 | } | |
305 | ||
306 | static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) | |
307 | { | |
308 | int i; | |
309 | u16 mac; | |
310 | ||
311 | for (i = 0; i < ETH_ALEN; i++) | |
312 | dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); | |
313 | ||
28bd620c DC |
314 | if (adapter->conf_flags & MICREL_KS884X) { |
315 | /* | |
316 | the sequence of saving mac addr between MAC and Switch is | |
317 | different. | |
318 | */ | |
319 | ||
320 | mac = ks8842_read16(adapter, 2, REG_MARL); | |
321 | ks8842_write16(adapter, 39, mac, REG_MACAR3); | |
322 | mac = ks8842_read16(adapter, 2, REG_MARM); | |
323 | ks8842_write16(adapter, 39, mac, REG_MACAR2); | |
324 | mac = ks8842_read16(adapter, 2, REG_MARH); | |
325 | ks8842_write16(adapter, 39, mac, REG_MACAR1); | |
326 | } else { | |
327 | ||
328 | /* make sure the switch port uses the same MAC as the QMU */ | |
329 | mac = ks8842_read16(adapter, 2, REG_MARL); | |
330 | ks8842_write16(adapter, 39, mac, REG_MACAR1); | |
331 | mac = ks8842_read16(adapter, 2, REG_MARM); | |
332 | ks8842_write16(adapter, 39, mac, REG_MACAR2); | |
333 | mac = ks8842_read16(adapter, 2, REG_MARH); | |
334 | ks8842_write16(adapter, 39, mac, REG_MACAR3); | |
335 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
336 | } |
337 | ||
a1aa8822 RR |
338 | static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) |
339 | { | |
340 | unsigned long flags; | |
341 | unsigned i; | |
342 | ||
343 | spin_lock_irqsave(&adapter->lock, flags); | |
344 | for (i = 0; i < ETH_ALEN; i++) { | |
345 | ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); | |
28bd620c DC |
346 | if (!(adapter->conf_flags & MICREL_KS884X)) |
347 | ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], | |
348 | REG_MACAR1 + i); | |
349 | } | |
350 | ||
351 | if (adapter->conf_flags & MICREL_KS884X) { | |
352 | /* | |
353 | the sequence of saving mac addr between MAC and Switch is | |
354 | different. | |
355 | */ | |
356 | ||
357 | u16 mac; | |
358 | ||
359 | mac = ks8842_read16(adapter, 2, REG_MARL); | |
360 | ks8842_write16(adapter, 39, mac, REG_MACAR3); | |
361 | mac = ks8842_read16(adapter, 2, REG_MARM); | |
362 | ks8842_write16(adapter, 39, mac, REG_MACAR2); | |
363 | mac = ks8842_read16(adapter, 2, REG_MARH); | |
364 | ks8842_write16(adapter, 39, mac, REG_MACAR1); | |
a1aa8822 RR |
365 | } |
366 | spin_unlock_irqrestore(&adapter->lock, flags); | |
367 | } | |
368 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
369 | static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter) |
370 | { | |
371 | return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff; | |
372 | } | |
373 | ||
374 | static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) | |
375 | { | |
376 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
377 | int len = skb->len; | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 378 | |
a99db196 | 379 | netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n", |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="7">b07878e5 R |
380 | __func__, skb->len, skb->head, skb->data, |
381 | skb_tail_pointer(skb), skb_end_pointer(skb)); | |
382 | ||
383 | /* check FIFO buffer space, we need space for CRC and command bits */ | |
384 | if (ks8842_tx_fifo_space(adapter) < len + 8) | |
385 | return NETDEV_TX_BUSY; | |
386 | ||
28bd620c DC |
387 | if (adapter->conf_flags & KS884X_16BIT) { |
388 | u16 *ptr16 = (u16 *)skb->data; | |
389 | ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO); | |
390 | ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI); | |
391 | netdev->stats.tx_bytes += len; | |
392 | ||
393 | /* copy buffer */ | |
394 | while (len > 0) { | |
395 | iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO); | |
396 | iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI); | |
397 | len -= sizeof(u32); | |
398 | } | |
399 | } else { | |
400 | ||
401 | u32 *ptr = (u32 *)skb->data; | |
402 | u32 ctrl; | |
403 | /* the control word, enable IRQ, port 1 and the length */ | |
404 | ctrl = 0x8000 | 0x100 | (len << 16); | |
405 | ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 406 | |
28bd620c | 407 | netdev->stats.tx_bytes += len; |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 408 | |
28bd620c DC |
409 | /* copy buffer */ |
410 | while (len > 0) { | |
411 | iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); | |
412 | len -= sizeof(u32); | |
413 | ptr++; | |
414 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="13">b07878e5 R |
415 | } |
416 | ||
417 | /* enqueue packet */ | |
418 | ks8842_write16(adapter, 17, 1, REG_TXQCR); | |
419 | ||
420 | dev_kfree_skb(skb); | |
421 | ||
422 | return NETDEV_TX_OK; | |
423 | } | |
424 | ||
425 | static void ks8842_rx_frame(struct net_device *netdev, | |
426 | struct ks8842_adapter *adapter) | |
427 | { | |
28bd620c DC |
428 | u32 status; |
429 | int len; | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 430 | |
28bd620c | 431 | if (adapter->conf_flags & KS884X_16BIT) { |
e2df8b7f DM |
432 | status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO); |
433 | len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI); | |
28bd620c | 434 | netdev_dbg(netdev, "%s - rx_data: status: %x\n", |
e2df8b7f | 435 | __func__, status); |
28bd620c DC |
436 | } else { |
437 | status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); | |
438 | len = (status >> 16) & 0x7ff; | |
439 | status &= 0xffff; | |
440 | netdev_dbg(netdev, "%s - rx_data: status: %x\n", | |
441 | __func__, status); | |
442 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5 R |
443 | |
444 | /* check the status */ | |
445 | if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { | |
89d71a66 | 446 | struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len); |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 447 | |
a99db196 | 448 | netdev_dbg(netdev, "%s, got package, len: %d\n", __func__, len); |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 449 | if (skb) { |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5 R |
450 | |
451 | netdev->stats.rx_packets++; | |
452 | netdev->stats.rx_bytes += len; | |
453 | if (status & RXSR_MULTICAST) | |
454 | netdev->stats.multicast++; | |
455 | ||
28bd620c DC |
456 | if (adapter->conf_flags & KS884X_16BIT) { |
457 | u16 *data16 = (u16 *)skb_put(skb, len); | |
458 | ks8842_select_bank(adapter, 17); | |
459 | while (len > 0) { | |
460 | *data16++ = ioread16(adapter->hw_addr + | |
461 | REG_QMU_DATA_LO); | |
462 | *data16++ = ioread16(adapter->hw_addr + | |
463 | REG_QMU_DATA_HI); | |
464 | len -= sizeof(u32); | |
465 | } | |
466 | } else { | |
467 | u32 *data = (u32 *)skb_put(skb, len); | |
468 | ||
469 | ks8842_select_bank(adapter, 17); | |
470 | while (len > 0) { | |
471 | *data++ = ioread32(adapter->hw_addr + | |
472 | REG_QMU_DATA_LO); | |
473 | len -= sizeof(u32); | |
474 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 475 | } |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="5">b07878e5 R |
476 | skb->protocol = eth_type_trans(skb, netdev); |
477 | netif_rx(skb); | |
478 | } else | |
479 | netdev->stats.rx_dropped++; | |
480 | } else { | |
a99db196 | 481 | netdev_dbg(netdev, "RX error, status: %x\n", status); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="22">b07878e5 R |
482 | netdev->stats.rx_errors++; |
483 | if (status & RXSR_TOO_LONG) | |
484 | netdev->stats.rx_length_errors++; | |
485 | if (status & RXSR_CRC_ERROR) | |
486 | netdev->stats.rx_crc_errors++; | |
487 | if (status & RXSR_RUNT) | |
488 | netdev->stats.rx_frame_errors++; | |
489 | } | |
490 | ||
491 | /* set high watermark to 3K */ | |
492 | ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR); | |
493 | ||
494 | /* release the frame */ | |
495 | ks8842_write16(adapter, 17, 0x01, REG_RXQCR); | |
496 | ||
497 | /* set high watermark to 2K */ | |
498 | ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR); | |
499 | } | |
500 | ||
501 | void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter) | |
502 | { | |
503 | u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; | |
a99db196 | 504 | netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
505 | while (rx_data) { |
506 | ks8842_rx_frame(netdev, adapter); | |
507 | rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; | |
508 | } | |
509 | } | |
510 | ||
511 | void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter) | |
512 | { | |
513 | u16 sr = ks8842_read16(adapter, 16, REG_TXSR); | |
a99db196 | 514 | netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="8">b07878e5 R |
515 | netdev->stats.tx_packets++; |
516 | if (netif_queue_stopped(netdev)) | |
517 | netif_wake_queue(netdev); | |
518 | } | |
519 | ||
520 | void ks8842_handle_rx_overrun(struct net_device *netdev, | |
521 | struct ks8842_adapter *adapter) | |
522 | { | |
a99db196 | 523 | netdev_dbg(netdev, "%s: entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="18">b07878e5 R |
524 | netdev->stats.rx_errors++; |
525 | netdev->stats.rx_fifo_errors++; | |
526 | } | |
527 | ||
528 | void ks8842_tasklet(unsigned long arg) | |
529 | { | |
530 | struct net_device *netdev = (struct net_device *)arg; | |
531 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
532 | u16 isr; | |
533 | unsigned long flags; | |
534 | u16 entry_bank; | |
535 | ||
536 | /* read current bank to be able to set it back */ | |
537 | spin_lock_irqsave(&adapter->lock, flags); | |
538 | entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); | |
539 | spin_unlock_irqrestore(&adapter->lock, flags); | |
540 | ||
541 | isr = ks8842_read16(adapter, 18, REG_ISR); | |
a99db196 | 542 | netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5 R |
543 | |
544 | /* Ack */ | |
545 | ks8842_write16(adapter, 18, isr, REG_ISR); | |
546 | ||
db5824dd RR |
547 | if (!(adapter->conf_flags & MICREL_KS884X)) |
548 | /* Ack in the timberdale IP as well */ | |
549 | iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR); | |
550 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="34">b07878e5 R |
551 | if (!netif_running(netdev)) |
552 | return; | |
553 | ||
554 | if (isr & IRQ_LINK_CHANGE) | |
555 | ks8842_update_link_status(netdev, adapter); | |
556 | ||
557 | if (isr & (IRQ_RX | IRQ_RX_ERROR)) | |
558 | ks8842_handle_rx(netdev, adapter); | |
559 | ||
560 | if (isr & IRQ_TX) | |
561 | ks8842_handle_tx(netdev, adapter); | |
562 | ||
563 | if (isr & IRQ_RX_OVERRUN) | |
564 | ks8842_handle_rx_overrun(netdev, adapter); | |
565 | ||
566 | if (isr & IRQ_TX_STOPPED) { | |
567 | ks8842_disable_tx(adapter); | |
568 | ks8842_enable_tx(adapter); | |
569 | } | |
570 | ||
571 | if (isr & IRQ_RX_STOPPED) { | |
572 | ks8842_disable_rx(adapter); | |
573 | ks8842_enable_rx(adapter); | |
574 | } | |
575 | ||
576 | /* re-enable interrupts, put back the bank selection register */ | |
577 | spin_lock_irqsave(&adapter->lock, flags); | |
578 | ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); | |
579 | iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); | |
580 | spin_unlock_irqrestore(&adapter->lock, flags); | |
581 | } | |
582 | ||
583 | static irqreturn_t ks8842_irq(int irq, void *devid) | |
584 | { | |
a99db196 RR |
585 | struct net_device *netdev = devid; |
586 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="5">b07878e5 R |
587 | u16 isr; |
588 | u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); | |
589 | irqreturn_t ret = IRQ_NONE; | |
590 | ||
591 | isr = ks8842_read16(adapter, 18, REG_ISR); | |
a99db196 | 592 | netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="24">b07878e5 R |
593 | |
594 | if (isr) { | |
595 | /* disable IRQ */ | |
596 | ks8842_write16(adapter, 18, 0x00, REG_IER); | |
597 | ||
598 | /* schedule tasklet */ | |
599 | tasklet_schedule(&adapter->tasklet); | |
600 | ||
601 | ret = IRQ_HANDLED; | |
602 | } | |
603 | ||
604 | iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | ||
609 | ||
610 | /* Netdevice operations */ | |
611 | ||
612 | static int ks8842_open(struct net_device *netdev) | |
613 | { | |
614 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
615 | int err; | |
616 | ||
a99db196 | 617 | netdev_dbg(netdev, "%s - entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5 R |
618 | |
619 | /* reset the HW */ | |
620 | ks8842_reset_hw(adapter); | |
621 | ||
a1aa8822 RR |
622 | ks8842_write_mac_addr(adapter, netdev->dev_addr); |
623 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5 R |
624 | ks8842_update_link_status(netdev, adapter); |
625 | ||
626 | err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME, | |
a99db196 | 627 | netdev); |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 628 | if (err) { |
0dc7d2b3 | 629 | pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="10">b07878e5 R |
630 | return err; |
631 | } | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int ks8842_close(struct net_device *netdev) | |
637 | { | |
638 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
639 | ||
a99db196 | 640 | netdev_dbg(netdev, "%s - entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 641 | |
cc88e450 RR |
642 | cancel_work_sync(&adapter->timeout_work); |
643 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 644 | /* free the irq */ |
a99db196 | 645 | free_irq(adapter->irq, netdev); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="7">b07878e5 R |
646 | |
647 | /* disable the switch */ | |
648 | ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
61357325 SH |
653 | static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb, |
654 | struct net_device *netdev) | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5 R |
655 | { |
656 | int ret; | |
657 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
658 | ||
a99db196 | 659 | netdev_dbg(netdev, "%s: entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5 R |
660 | |
661 | ret = ks8842_tx_frame(skb, netdev); | |
662 | ||
663 | if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8) | |
664 | netif_stop_queue(netdev); | |
665 | ||
666 | return ret; | |
667 | } | |
668 | ||
669 | static int ks8842_set_mac(struct net_device *netdev, void *p) | |
670 | { | |
671 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
672 | struct sockaddr *addr = p; |
673 | char *mac = (u8 *)addr->sa_data; | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 674 | |
a99db196 | 675 | netdev_dbg(netdev, "%s: entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5 R |
676 | |
677 | if (!is_valid_ether_addr(addr->sa_data)) | |
678 | return -EADDRNOTAVAIL; | |
679 | ||
680 | memcpy(netdev->dev_addr, mac, netdev->addr_len); | |
681 | ||
a1aa8822 | 682 | ks8842_write_mac_addr(adapter, mac); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5 R |
683 | return 0; |
684 | } | |
685 | ||
cc88e450 | 686 | static void ks8842_tx_timeout_work(struct work_struct *work) |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 687 | { |
cc88e450 RR |
688 | struct ks8842_adapter *adapter = |
689 | container_of(work, struct ks8842_adapter, timeout_work); | |
690 | struct net_device *netdev = adapter->netdev; | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="2">b07878e5 R |
691 | unsigned long flags; |
692 | ||
a99db196 | 693 | netdev_dbg(netdev, "%s: entry\n", __func__); |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="5">b07878e5 R |
694 | |
695 | spin_lock_irqsave(&adapter->lock, flags); | |
696 | /* disable interrupts */ | |
697 | ks8842_write16(adapter, 18, 0, REG_IER); | |
698 | ks8842_write16(adapter, 18, 0xFFFF, REG_ISR); | |
cc88e450 RR |
699 | |
700 | netif_stop_queue(netdev); | |
701 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="4">b07878e5 R |
702 | spin_unlock_irqrestore(&adapter->lock, flags); |
703 | ||
704 | ks8842_reset_hw(adapter); | |
705 | ||
a1aa8822 RR |
706 | ks8842_write_mac_addr(adapter, netdev->dev_addr); |
707 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="3">b07878e5 R |
708 | ks8842_update_link_status(netdev, adapter); |
709 | } | |
710 | ||
cc88e450 RR |
711 | static void ks8842_tx_timeout(struct net_device *netdev) |
712 | { | |
713 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
714 | ||
715 | netdev_dbg(netdev, "%s: entry\n", __func__); | |
716 | ||
717 | schedule_work(&adapter->timeout_work); | |
718 | } | |
719 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
720 | static const struct net_device_ops ks8842_netdev_ops = { |
721 | .ndo_open = ks8842_open, | |
722 | .ndo_stop = ks8842_close, | |
723 | .ndo_start_xmit = ks8842_xmit_frame, | |
724 | .ndo_set_mac_address = ks8842_set_mac, | |
725 | .ndo_tx_timeout = ks8842_tx_timeout, | |
726 | .ndo_validate_addr = eth_validate_addr | |
727 | }; | |
728 | ||
0fc0b732 | 729 | static const struct ethtool_ops ks8842_ethtool_ops = { |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
730 | .get_link = ethtool_op_get_link, |
731 | }; | |
732 | ||
733 | static int __devinit ks8842_probe(struct platform_device *pdev) | |
734 | { | |
735 | int err = -ENOMEM; | |
736 | struct resource *iomem; | |
737 | struct net_device *netdev; | |
738 | struct ks8842_adapter *adapter; | |
a1aa8822 | 739 | struct ks8842_platform_data *pdata = pdev->dev.platform_data; |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 740 | u16 id; |
a1aa8822 | 741 | unsigned i; |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="12">b07878e5 R |
742 | |
743 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
744 | if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) | |
745 | goto err_mem_region; | |
746 | ||
747 | netdev = alloc_etherdev(sizeof(struct ks8842_adapter)); | |
748 | if (!netdev) | |
749 | goto err_alloc_etherdev; | |
750 | ||
751 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
752 | ||
753 | adapter = netdev_priv(netdev); | |
cc88e450 RR |
754 | adapter->netdev = netdev; |
755 | INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work); | |
\9aöjfors, 2009-06-04 03:35:55 +0000">b07878e5 | 756 | adapter->hw_addr = ioremap(iomem->start, resource_size(iomem)); |
28bd620c DC |
757 | adapter->conf_flags = iomem->flags; |
758 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="9">b07878e5 R |
759 | if (!adapter->hw_addr) |
760 | goto err_ioremap; | |
761 | ||
762 | adapter->irq = platform_get_irq(pdev, 0); | |
763 | if (adapter->irq < 0) { | |
764 | err = adapter->irq; | |
765 | goto err_get_irq; | |
766 | } | |
767 | ||
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="6">b07878e5 R |
768 | tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev); |
769 | spin_lock_init(&adapter->lock); | |
770 | ||
771 | netdev->netdev_ops = &ks8842_netdev_ops; | |
772 | netdev->ethtool_ops = &ks8842_ethtool_ops; | |
773 | ||
a1aa8822 RR |
774 | /* Check if a mac address was given */ |
775 | i = netdev->addr_len; | |
776 | if (pdata) { | |
777 | for (i = 0; i < netdev->addr_len; i++) | |
778 | if (pdata->macaddr[i] != 0) | |
779 | break; | |
780 | ||
781 | if (i < netdev->addr_len) | |
782 | /* an address was passed, use it */ | |
783 | memcpy(netdev->dev_addr, pdata->macaddr, | |
784 | netdev->addr_len); | |
785 | } | |
786 | ||
787 | if (i == netdev->addr_len) { | |
788 | ks8842_read_mac_addr(adapter, netdev->dev_addr); | |
789 | ||
790 | if (!is_valid_ether_addr(netdev->dev_addr)) | |
791 | random_ether_addr(netdev->dev_addr); | |
792 | } | |
\9aöjfors, 2009-06-04 03:35:55 +0000" rowspan="10">b07878e5 R |
793 | |
794 | id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE); | |
795 | ||
796 | strcpy(netdev->name, "eth%d"); | |
797 | err = register_netdev(netdev); | |
798 | if (err) | |
799 | goto err_register; | |
800 | ||
801 | platform_set_drvdata(pdev, netdev); | |
802 | ||
0dc7d2b3 | 803 | 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 |
804 | (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); |
805 | ||
806 | return 0; | |
807 | ||
808 | err_register: | |
809 | err_get_irq: | |
810 | iounmap(adapter->hw_addr); | |
811 | err_ioremap: | |
812 | free_netdev(netdev); | |
813 | err_alloc_etherdev: | |
814 | release_mem_region(iomem->start, resource_size(iomem)); | |
815 | err_mem_region: | |
816 | return err; | |
817 | } | |
818 | ||
819 | static int __devexit ks8842_remove(struct platform_device *pdev) | |
820 | { | |
821 | struct net_device *netdev = platform_get_drvdata(pdev); | |
822 | struct ks8842_adapter *adapter = netdev_priv(netdev); | |
823 | struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
824 | ||
825 | unregister_netdev(netdev); | |
826 | tasklet_kill(&adapter->tasklet); | |
827 | iounmap(adapter->hw_addr); | |
828 | free_netdev(netdev); | |
829 | release_mem_region(iomem->start, resource_size(iomem)); | |
830 | platform_set_drvdata(pdev, NULL); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | ||
835 | static struct platform_driver ks8842_platform_driver = { | |
836 | .driver = { | |
837 | .name = DRV_NAME, | |
838 | .owner = THIS_MODULE, | |
839 | }, | |
840 | .probe = ks8842_probe, | |
841 | .remove = ks8842_remove, | |
842 | }; | |
843 | ||
844 | static int __init ks8842_init(void) | |
845 | { | |
846 | return platform_driver_register(&ks8842_platform_driver); | |
847 | } | |
848 | ||
849 | static void __exit ks8842_exit(void) | |
850 | { | |
851 | platform_driver_unregister(&ks8842_platform_driver); | |
852 | } | |
853 | ||
854 | module_init(ks8842_init); | |
855 | module_exit(ks8842_exit); | |
856 | ||
857 | MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver"); | |
858 | MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); | |
859 | MODULE_LICENSE("GPL v2"); | |
860 | MODULE_ALIAS("platform:ks8842"); | |
861 |