diff options
-rw-r--r-- | drivers/net/Kconfig | 6 | ||||
-rw-r--r-- | drivers/net/Makefile | 1 | ||||
-rwxr-xr-x | drivers/net/xilinx_emaclite.c | 1041 |
3 files changed, 1048 insertions, 0 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 29935a9fb1a2..bbe77a065845 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig | |||
@@ -1926,6 +1926,12 @@ config ATL2 | |||
1926 | To compile this driver as a module, choose M here. The module | 1926 | To compile this driver as a module, choose M here. The module |
1927 | will be called atl2. | 1927 | will be called atl2. |
1928 | 1928 | ||
1929 | config XILINX_EMACLITE | ||
1930 | tristate "Xilinx 10/100 Ethernet Lite support" | ||
1931 | depends on PPC32 || MICROBLAZE | ||
1932 | help | ||
1933 | This driver supports the 10/100 Ethernet Lite from Xilinx. | ||
1934 | |||
1929 | source "drivers/net/fs_enet/Kconfig" | 1935 | source "drivers/net/fs_enet/Kconfig" |
1930 | 1936 | ||
1931 | endif # NET_ETHERNET | 1937 | endif # NET_ETHERNET |
diff --git a/drivers/net/Makefile b/drivers/net/Makefile index ead8cab3cfe1..99ae6d7fe6a9 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile | |||
@@ -142,6 +142,7 @@ obj-$(CONFIG_TSI108_ETH) += tsi108_eth.o | |||
142 | obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o | 142 | obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o |
143 | ll_temac-objs := ll_temac_main.o ll_temac_mdio.o | 143 | ll_temac-objs := ll_temac_main.o ll_temac_mdio.o |
144 | obj-$(CONFIG_XILINX_LL_TEMAC) += ll_temac.o | 144 | obj-$(CONFIG_XILINX_LL_TEMAC) += ll_temac.o |
145 | obj-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o | ||
145 | obj-$(CONFIG_QLA3XXX) += qla3xxx.o | 146 | obj-$(CONFIG_QLA3XXX) += qla3xxx.o |
146 | obj-$(CONFIG_QLGE) += qlge/ | 147 | obj-$(CONFIG_QLGE) += qlge/ |
147 | 148 | ||
diff --git a/drivers/net/xilinx_emaclite.c b/drivers/net/xilinx_emaclite.c new file mode 100755 index 000000000000..7e05b40ae36b --- /dev/null +++ b/drivers/net/xilinx_emaclite.c | |||
@@ -0,0 +1,1041 @@ | |||
1 | /* | ||
2 | * Xilinx EmacLite Linux driver for the Xilinx Ethernet MAC Lite device. | ||
3 | * | ||
4 | * This is a new flat driver which is based on the original emac_lite | ||
5 | * driver from John Williams <john.williams@petalogix.com>. | ||
6 | * | ||
7 | * 2007-2009 (c) Xilinx, Inc. | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify it | ||
10 | * under the terms of the GNU General Public License as published by the | ||
11 | * Free Software Foundation; either version 2 of the License, or (at your | ||
12 | * option) any later version. | ||
13 | */ | ||
14 | |||
15 | #include <linux/module.h> | ||
16 | #include <linux/uaccess.h> | ||
17 | #include <linux/init.h> | ||
18 | #include <linux/netdevice.h> | ||
19 | #include <linux/etherdevice.h> | ||
20 | #include <linux/skbuff.h> | ||
21 | #include <linux/io.h> | ||
22 | |||
23 | #include <linux/of_device.h> | ||
24 | #include <linux/of_platform.h> | ||
25 | |||
26 | #define DRIVER_NAME "xilinx_emaclite" | ||
27 | |||
28 | /* Register offsets for the EmacLite Core */ | ||
29 | #define XEL_TXBUFF_OFFSET 0x0 /* Transmit Buffer */ | ||
30 | #define XEL_GIER_OFFSET 0x07F8 /* GIE Register */ | ||
31 | #define XEL_TSR_OFFSET 0x07FC /* Tx status */ | ||
32 | #define XEL_TPLR_OFFSET 0x07F4 /* Tx packet length */ | ||
33 | |||
34 | #define XEL_RXBUFF_OFFSET 0x1000 /* Receive Buffer */ | ||
35 | #define XEL_RPLR_OFFSET 0x100C /* Rx packet length */ | ||
36 | #define XEL_RSR_OFFSET 0x17FC /* Rx status */ | ||
37 | |||
38 | #define XEL_BUFFER_OFFSET 0x0800 /* Next Tx/Rx buffer's offset */ | ||
39 | |||
40 | /* Global Interrupt Enable Register (GIER) Bit Masks */ | ||
41 | #define XEL_GIER_GIE_MASK 0x80000000 /* Global Enable */ | ||
42 | |||
43 | /* Transmit Status Register (TSR) Bit Masks */ | ||
44 | #define XEL_TSR_XMIT_BUSY_MASK 0x00000001 /* Tx complete */ | ||
45 | #define XEL_TSR_PROGRAM_MASK 0x00000002 /* Program the MAC address */ | ||
46 | #define XEL_TSR_XMIT_IE_MASK 0x00000008 /* Tx interrupt enable bit */ | ||
47 | #define XEL_TSR_XMIT_ACTIVE_MASK 0x80000000 /* Buffer is active, SW bit | ||
48 | * only. This is not documented | ||
49 | * in the HW spec */ | ||
50 | |||
51 | /* Define for programming the MAC address into the EmacLite */ | ||
52 | #define XEL_TSR_PROG_MAC_ADDR (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_PROGRAM_MASK) | ||
53 | |||
54 | /* Receive Status Register (RSR) */ | ||
55 | #define XEL_RSR_RECV_DONE_MASK 0x00000001 /* Rx complete */ | ||
56 | #define XEL_RSR_RECV_IE_MASK 0x00000008 /* Rx interrupt enable bit */ | ||
57 | |||
58 | /* Transmit Packet Length Register (TPLR) */ | ||
59 | #define XEL_TPLR_LENGTH_MASK 0x0000FFFF /* Tx packet length */ | ||
60 | |||
61 | /* Receive Packet Length Register (RPLR) */ | ||
62 | #define XEL_RPLR_LENGTH_MASK 0x0000FFFF /* Rx packet length */ | ||
63 | |||
64 | #define XEL_HEADER_OFFSET 12 /* Offset to length field */ | ||
65 | #define XEL_HEADER_SHIFT 16 /* Shift value for length */ | ||
66 | |||
67 | /* General Ethernet Definitions */ | ||
68 | #define XEL_ARP_PACKET_SIZE 28 /* Max ARP packet size */ | ||
69 | #define XEL_HEADER_IP_LENGTH_OFFSET 16 /* IP Length Offset */ | ||
70 | |||
71 | |||
72 | |||
73 | #define TX_TIMEOUT (60*HZ) /* Tx timeout is 60 seconds. */ | ||
74 | #define ALIGNMENT 4 | ||
75 | |||
76 | /* BUFFER_ALIGN(adr) calculates the number of bytes to the next alignment. */ | ||
77 | #define BUFFER_ALIGN(adr) ((ALIGNMENT - ((u32) adr)) % ALIGNMENT) | ||
78 | |||
79 | /** | ||
80 | * struct net_local - Our private per device data | ||
81 | * @ndev: instance of the network device | ||
82 | * @tx_ping_pong: indicates whether Tx Pong buffer is configured in HW | ||
83 | * @rx_ping_pong: indicates whether Rx Pong buffer is configured in HW | ||
84 | * @next_tx_buf_to_use: next Tx buffer to write to | ||
85 | * @next_rx_buf_to_use: next Rx buffer to read from | ||
86 | * @base_addr: base address of the Emaclite device | ||
87 | * @reset_lock: lock used for synchronization | ||
88 | * @deferred_skb: holds an skb (for transmission at a later time) when the | ||
89 | * Tx buffer is not free | ||
90 | */ | ||
91 | struct net_local { | ||
92 | |||
93 | struct net_device *ndev; | ||
94 | |||
95 | bool tx_ping_pong; | ||
96 | bool rx_ping_pong; | ||
97 | u32 next_tx_buf_to_use; | ||
98 | u32 next_rx_buf_to_use; | ||
99 | void __iomem *base_addr; | ||
100 | |||
101 | spinlock_t reset_lock; | ||
102 | struct sk_buff *deferred_skb; | ||
103 | }; | ||
104 | |||
105 | |||
106 | /*************************/ | ||
107 | /* EmacLite driver calls */ | ||
108 | /*************************/ | ||
109 | |||
110 | /** | ||
111 | * xemaclite_enable_interrupts - Enable the interrupts for the EmacLite device | ||
112 | * @drvdata: Pointer to the Emaclite device private data | ||
113 | * | ||
114 | * This function enables the Tx and Rx interrupts for the Emaclite device along | ||
115 | * with the Global Interrupt Enable. | ||
116 | */ | ||
117 | static void xemaclite_enable_interrupts(struct net_local *drvdata) | ||
118 | { | ||
119 | u32 reg_data; | ||
120 | |||
121 | /* Enable the Tx interrupts for the first Buffer */ | ||
122 | reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET); | ||
123 | out_be32(drvdata->base_addr + XEL_TSR_OFFSET, | ||
124 | reg_data | XEL_TSR_XMIT_IE_MASK); | ||
125 | |||
126 | /* Enable the Tx interrupts for the second Buffer if | ||
127 | * configured in HW */ | ||
128 | if (drvdata->tx_ping_pong != 0) { | ||
129 | reg_data = in_be32(drvdata->base_addr + | ||
130 | XEL_BUFFER_OFFSET + XEL_TSR_OFFSET); | ||
131 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
132 | XEL_TSR_OFFSET, | ||
133 | reg_data | XEL_TSR_XMIT_IE_MASK); | ||
134 | } | ||
135 | |||
136 | /* Enable the Rx interrupts for the first buffer */ | ||
137 | reg_data = in_be32(drvdata->base_addr + XEL_RSR_OFFSET); | ||
138 | out_be32(drvdata->base_addr + XEL_RSR_OFFSET, | ||
139 | reg_data | XEL_RSR_RECV_IE_MASK); | ||
140 | |||
141 | /* Enable the Rx interrupts for the second Buffer if | ||
142 | * configured in HW */ | ||
143 | if (drvdata->rx_ping_pong != 0) { | ||
144 | reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
145 | XEL_RSR_OFFSET); | ||
146 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
147 | XEL_RSR_OFFSET, | ||
148 | reg_data | XEL_RSR_RECV_IE_MASK); | ||
149 | } | ||
150 | |||
151 | /* Enable the Global Interrupt Enable */ | ||
152 | out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK); | ||
153 | } | ||
154 | |||
155 | /** | ||
156 | * xemaclite_disable_interrupts - Disable the interrupts for the EmacLite device | ||
157 | * @drvdata: Pointer to the Emaclite device private data | ||
158 | * | ||
159 | * This function disables the Tx and Rx interrupts for the Emaclite device, | ||
160 | * along with the Global Interrupt Enable. | ||
161 | */ | ||
162 | static void xemaclite_disable_interrupts(struct net_local *drvdata) | ||
163 | { | ||
164 | u32 reg_data; | ||
165 | |||
166 | /* Disable the Global Interrupt Enable */ | ||
167 | out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK); | ||
168 | |||
169 | /* Disable the Tx interrupts for the first buffer */ | ||
170 | reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET); | ||
171 | out_be32(drvdata->base_addr + XEL_TSR_OFFSET, | ||
172 | reg_data & (~XEL_TSR_XMIT_IE_MASK)); | ||
173 | |||
174 | /* Disable the Tx interrupts for the second Buffer | ||
175 | * if configured in HW */ | ||
176 | if (drvdata->tx_ping_pong != 0) { | ||
177 | reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
178 | XEL_TSR_OFFSET); | ||
179 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
180 | XEL_TSR_OFFSET, | ||
181 | reg_data & (~XEL_TSR_XMIT_IE_MASK)); | ||
182 | } | ||
183 | |||
184 | /* Disable the Rx interrupts for the first buffer */ | ||
185 | reg_data = in_be32(drvdata->base_addr + XEL_RSR_OFFSET); | ||
186 | out_be32(drvdata->base_addr + XEL_RSR_OFFSET, | ||
187 | reg_data & (~XEL_RSR_RECV_IE_MASK)); | ||
188 | |||
189 | /* Disable the Rx interrupts for the second buffer | ||
190 | * if configured in HW */ | ||
191 | if (drvdata->rx_ping_pong != 0) { | ||
192 | |||
193 | reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
194 | XEL_RSR_OFFSET); | ||
195 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + | ||
196 | XEL_RSR_OFFSET, | ||
197 | reg_data & (~XEL_RSR_RECV_IE_MASK)); | ||
198 | } | ||
199 | } | ||
200 | |||
201 | /** | ||
202 | * xemaclite_aligned_write - Write from 16-bit aligned to 32-bit aligned address | ||
203 | * @src_ptr: Void pointer to the 16-bit aligned source address | ||
204 | * @dest_ptr: Pointer to the 32-bit aligned destination address | ||
205 | * @length: Number bytes to write from source to destination | ||
206 | * | ||
207 | * This function writes data from a 16-bit aligned buffer to a 32-bit aligned | ||
208 | * address in the EmacLite device. | ||
209 | */ | ||
210 | static void xemaclite_aligned_write(void *src_ptr, u32 *dest_ptr, | ||
211 | unsigned length) | ||
212 | { | ||
213 | u32 align_buffer; | ||
214 | u32 *to_u32_ptr; | ||
215 | u16 *from_u16_ptr, *to_u16_ptr; | ||
216 | |||
217 | to_u32_ptr = dest_ptr; | ||
218 | from_u16_ptr = (u16 *) src_ptr; | ||
219 | align_buffer = 0; | ||
220 | |||
221 | for (; length > 3; length -= 4) { | ||
222 | to_u16_ptr = (u16 *) ((void *) &align_buffer); | ||
223 | *to_u16_ptr++ = *from_u16_ptr++; | ||
224 | *to_u16_ptr++ = *from_u16_ptr++; | ||
225 | |||
226 | /* Output a word */ | ||
227 | *to_u32_ptr++ = align_buffer; | ||
228 | } | ||
229 | if (length) { | ||
230 | u8 *from_u8_ptr, *to_u8_ptr; | ||
231 | |||
232 | /* Set up to output the remaining data */ | ||
233 | align_buffer = 0; | ||
234 | to_u8_ptr = (u8 *) &align_buffer; | ||
235 | from_u8_ptr = (u8 *) from_u16_ptr; | ||
236 | |||
237 | /* Output the remaining data */ | ||
238 | for (; length > 0; length--) | ||
239 | *to_u8_ptr++ = *from_u8_ptr++; | ||
240 | |||
241 | *to_u32_ptr = align_buffer; | ||
242 | } | ||
243 | } | ||
244 | |||
245 | /** | ||
246 | * xemaclite_aligned_read - Read from 32-bit aligned to 16-bit aligned buffer | ||
247 | * @src_ptr: Pointer to the 32-bit aligned source address | ||
248 | * @dest_ptr: Pointer to the 16-bit aligned destination address | ||
249 | * @length: Number bytes to read from source to destination | ||
250 | * | ||
251 | * This function reads data from a 32-bit aligned address in the EmacLite device | ||
252 | * to a 16-bit aligned buffer. | ||
253 | */ | ||
254 | static void xemaclite_aligned_read(u32 *src_ptr, u8 *dest_ptr, | ||
255 | unsigned length) | ||
256 | { | ||
257 | u16 *to_u16_ptr, *from_u16_ptr; | ||
258 | u32 *from_u32_ptr; | ||
259 | u32 align_buffer; | ||
260 | |||
261 | from_u32_ptr = src_ptr; | ||
262 | to_u16_ptr = (u16 *) dest_ptr; | ||
263 | |||
264 | for (; length > 3; length -= 4) { | ||
265 | /* Copy each word into the temporary buffer */ | ||
266 | align_buffer = *from_u32_ptr++; | ||
267 | from_u16_ptr = (u16 *)&align_buffer; | ||
268 | |||
269 | /* Read data from source */ | ||
270 | *to_u16_ptr++ = *from_u16_ptr++; | ||
271 | *to_u16_ptr++ = *from_u16_ptr++; | ||
272 | } | ||
273 | |||
274 | if (length) { | ||
275 | u8 *to_u8_ptr, *from_u8_ptr; | ||
276 | |||
277 | /* Set up to read the remaining data */ | ||
278 | to_u8_ptr = (u8 *) to_u16_ptr; | ||
279 | align_buffer = *from_u32_ptr++; | ||
280 | from_u8_ptr = (u8 *) &align_buffer; | ||
281 | |||
282 | /* Read the remaining data */ | ||
283 | for (; length > 0; length--) | ||
284 | *to_u8_ptr = *from_u8_ptr; | ||
285 | } | ||
286 | } | ||
287 | |||
288 | /** | ||
289 | * xemaclite_send_data - Send an Ethernet frame | ||
290 | * @drvdata: Pointer to the Emaclite device private data | ||
291 | * @data: Pointer to the data to be sent | ||
292 | * @byte_count: Total frame size, including header | ||
293 | * | ||
294 | * This function checks if the Tx buffer of the Emaclite device is free to send | ||
295 | * data. If so, it fills the Tx buffer with data for transmission. Otherwise, it | ||
296 | * returns an error. | ||
297 | * | ||
298 | * Return: 0 upon success or -1 if the buffer(s) are full. | ||
299 | * | ||
300 | * Note: The maximum Tx packet size can not be more than Ethernet header | ||
301 | * (14 Bytes) + Maximum MTU (1500 bytes). This is excluding FCS. | ||
302 | */ | ||
303 | static int xemaclite_send_data(struct net_local *drvdata, u8 *data, | ||
304 | unsigned int byte_count) | ||
305 | { | ||
306 | u32 reg_data; | ||
307 | void __iomem *addr; | ||
308 | |||
309 | /* Determine the expected Tx buffer address */ | ||
310 | addr = drvdata->base_addr + drvdata->next_tx_buf_to_use; | ||
311 | |||
312 | /* If the length is too large, truncate it */ | ||
313 | if (byte_count > ETH_FRAME_LEN) | ||
314 | byte_count = ETH_FRAME_LEN; | ||
315 | |||
316 | /* Check if the expected buffer is available */ | ||
317 | reg_data = in_be32(addr + XEL_TSR_OFFSET); | ||
318 | if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK | | ||
319 | XEL_TSR_XMIT_ACTIVE_MASK)) == 0) { | ||
320 | |||
321 | /* Switch to next buffer if configured */ | ||
322 | if (drvdata->tx_ping_pong != 0) | ||
323 | drvdata->next_tx_buf_to_use ^= XEL_BUFFER_OFFSET; | ||
324 | } else if (drvdata->tx_ping_pong != 0) { | ||
325 | /* If the expected buffer is full, try the other buffer, | ||
326 | * if it is configured in HW */ | ||
327 | |||
328 | addr = (void __iomem __force *)((u32 __force)addr ^ | ||
329 | XEL_BUFFER_OFFSET); | ||
330 | reg_data = in_be32(addr + XEL_TSR_OFFSET); | ||
331 | |||
332 | if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK | | ||
333 | XEL_TSR_XMIT_ACTIVE_MASK)) != 0) | ||
334 | return -1; /* Buffers were full, return failure */ | ||
335 | } else | ||
336 | return -1; /* Buffer was full, return failure */ | ||
337 | |||
338 | /* Write the frame to the buffer */ | ||
339 | xemaclite_aligned_write(data, (u32 __force *) addr, byte_count); | ||
340 | |||
341 | out_be32(addr + XEL_TPLR_OFFSET, (byte_count & XEL_TPLR_LENGTH_MASK)); | ||
342 | |||
343 | /* Update the Tx Status Register to indicate that there is a | ||
344 | * frame to send. Set the XEL_TSR_XMIT_ACTIVE_MASK flag which | ||
345 | * is used by the interrupt handler to check whether a frame | ||
346 | * has been transmitted */ | ||
347 | reg_data = in_be32(addr + XEL_TSR_OFFSET); | ||
348 | reg_data |= (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_XMIT_ACTIVE_MASK); | ||
349 | out_be32(addr + XEL_TSR_OFFSET, reg_data); | ||
350 | |||
351 | return 0; | ||
352 | } | ||
353 | |||
354 | /** | ||
355 | * xemaclite_recv_data - Receive a frame | ||
356 | * @drvdata: Pointer to the Emaclite device private data | ||
357 | * @data: Address where the data is to be received | ||
358 | * | ||
359 | * This function is intended to be called from the interrupt context or | ||
360 | * with a wrapper which waits for the receive frame to be available. | ||
361 | * | ||
362 | * Return: Total number of bytes received | ||
363 | */ | ||
364 | static u16 xemaclite_recv_data(struct net_local *drvdata, u8 *data) | ||
365 | { | ||
366 | void __iomem *addr; | ||
367 | u16 length, proto_type; | ||
368 | u32 reg_data; | ||
369 | |||
370 | /* Determine the expected buffer address */ | ||
371 | addr = (drvdata->base_addr + drvdata->next_rx_buf_to_use); | ||
372 | |||
373 | /* Verify which buffer has valid data */ | ||
374 | reg_data = in_be32(addr + XEL_RSR_OFFSET); | ||
375 | |||
376 | if ((reg_data & XEL_RSR_RECV_DONE_MASK) == XEL_RSR_RECV_DONE_MASK) { | ||
377 | if (drvdata->rx_ping_pong != 0) | ||
378 | drvdata->next_rx_buf_to_use ^= XEL_BUFFER_OFFSET; | ||
379 | } else { | ||
380 | /* The instance is out of sync, try other buffer if other | ||
381 | * buffer is configured, return 0 otherwise. If the instance is | ||
382 | * out of sync, do not update the 'next_rx_buf_to_use' since it | ||
383 | * will correct on subsequent calls */ | ||
384 | if (drvdata->rx_ping_pong != 0) | ||
385 | addr = (void __iomem __force *)((u32 __force)addr ^ | ||
386 | XEL_BUFFER_OFFSET); | ||
387 | else | ||
388 | return 0; /* No data was available */ | ||
389 | |||
390 | /* Verify that buffer has valid data */ | ||
391 | reg_data = in_be32(addr + XEL_RSR_OFFSET); | ||
392 | if ((reg_data & XEL_RSR_RECV_DONE_MASK) != | ||
393 | XEL_RSR_RECV_DONE_MASK) | ||
394 | return 0; /* No data was available */ | ||
395 | } | ||
396 | |||
397 | /* Get the protocol type of the ethernet frame that arrived */ | ||
398 | proto_type = ((in_be32(addr + XEL_HEADER_OFFSET + | ||
399 | XEL_RXBUFF_OFFSET) >> XEL_HEADER_SHIFT) & | ||
400 | XEL_RPLR_LENGTH_MASK); | ||
401 | |||
402 | /* Check if received ethernet frame is a raw ethernet frame | ||
403 | * or an IP packet or an ARP packet */ | ||
404 | if (proto_type > (ETH_FRAME_LEN + ETH_FCS_LEN)) { | ||
405 | |||
406 | if (proto_type == ETH_P_IP) { | ||
407 | length = ((in_be32(addr + | ||
408 | XEL_HEADER_IP_LENGTH_OFFSET + | ||
409 | XEL_RXBUFF_OFFSET) >> | ||
410 | XEL_HEADER_SHIFT) & | ||
411 | XEL_RPLR_LENGTH_MASK); | ||
412 | length += ETH_HLEN + ETH_FCS_LEN; | ||
413 | |||
414 | } else if (proto_type == ETH_P_ARP) | ||
415 | length = XEL_ARP_PACKET_SIZE + ETH_HLEN + ETH_FCS_LEN; | ||
416 | else | ||
417 | /* Field contains type other than IP or ARP, use max | ||
418 | * frame size and let user parse it */ | ||
419 | length = ETH_FRAME_LEN + ETH_FCS_LEN; | ||
420 | } else | ||
421 | /* Use the length in the frame, plus the header and trailer */ | ||
422 | length = proto_type + ETH_HLEN + ETH_FCS_LEN; | ||
423 | |||
424 | /* Read from the EmacLite device */ | ||
425 | xemaclite_aligned_read((u32 __force *) (addr + XEL_RXBUFF_OFFSET), | ||
426 | data, length); | ||
427 | |||
428 | /* Acknowledge the frame */ | ||
429 | reg_data = in_be32(addr + XEL_RSR_OFFSET); | ||
430 | reg_data &= ~XEL_RSR_RECV_DONE_MASK; | ||
431 | out_be32(addr + XEL_RSR_OFFSET, reg_data); | ||
432 | |||
433 | return length; | ||
434 | } | ||
435 | |||
436 | /** | ||
437 | * xemaclite_set_mac_address - Set the MAC address for this device | ||
438 | * @drvdata: Pointer to the Emaclite device private data | ||
439 | * @address_ptr:Pointer to the MAC address (MAC address is a 48-bit value) | ||
440 | * | ||
441 | * Tx must be idle and Rx should be idle for deterministic results. | ||
442 | * It is recommended that this function should be called after the | ||
443 | * initialization and before transmission of any packets from the device. | ||
444 | * The MAC address can be programmed using any of the two transmit | ||
445 | * buffers (if configured). | ||
446 | */ | ||
447 | static void xemaclite_set_mac_address(struct net_local *drvdata, | ||
448 | u8 *address_ptr) | ||
449 | { | ||
450 | void __iomem *addr; | ||
451 | u32 reg_data; | ||
452 | |||
453 | /* Determine the expected Tx buffer address */ | ||
454 | addr = drvdata->base_addr + drvdata->next_tx_buf_to_use; | ||
455 | |||
456 | xemaclite_aligned_write(address_ptr, (u32 __force *) addr, ETH_ALEN); | ||
457 | |||
458 | out_be32(addr + XEL_TPLR_OFFSET, ETH_ALEN); | ||
459 | |||
460 | /* Update the MAC address in the EmacLite */ | ||
461 | reg_data = in_be32(addr + XEL_TSR_OFFSET); | ||
462 | out_be32(addr + XEL_TSR_OFFSET, reg_data | XEL_TSR_PROG_MAC_ADDR); | ||
463 | |||
464 | /* Wait for EmacLite to finish with the MAC address update */ | ||
465 | while ((in_be32(addr + XEL_TSR_OFFSET) & | ||
466 | XEL_TSR_PROG_MAC_ADDR) != 0) | ||
467 | ; | ||
468 | } | ||
469 | |||
470 | /** | ||
471 | * xemaclite_tx_timeout - Callback for Tx Timeout | ||
472 | * @dev: Pointer to the network device | ||
473 | * | ||
474 | * This function is called when Tx time out occurs for Emaclite device. | ||
475 | */ | ||
476 | static void xemaclite_tx_timeout(struct net_device *dev) | ||
477 | { | ||
478 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
479 | unsigned long flags; | ||
480 | |||
481 | dev_err(&lp->ndev->dev, "Exceeded transmit timeout of %lu ms\n", | ||
482 | TX_TIMEOUT * 1000UL / HZ); | ||
483 | |||
484 | dev->stats.tx_errors++; | ||
485 | |||
486 | /* Reset the device */ | ||
487 | spin_lock_irqsave(&lp->reset_lock, flags); | ||
488 | |||
489 | /* Shouldn't really be necessary, but shouldn't hurt */ | ||
490 | netif_stop_queue(dev); | ||
491 | |||
492 | xemaclite_disable_interrupts(lp); | ||
493 | xemaclite_enable_interrupts(lp); | ||
494 | |||
495 | if (lp->deferred_skb) { | ||
496 | dev_kfree_skb(lp->deferred_skb); | ||
497 | lp->deferred_skb = NULL; | ||
498 | dev->stats.tx_errors++; | ||
499 | } | ||
500 | |||
501 | /* To exclude tx timeout */ | ||
502 | dev->trans_start = 0xffffffff - TX_TIMEOUT - TX_TIMEOUT; | ||
503 | |||
504 | /* We're all ready to go. Start the queue */ | ||
505 | netif_wake_queue(dev); | ||
506 | spin_unlock_irqrestore(&lp->reset_lock, flags); | ||
507 | } | ||
508 | |||
509 | /**********************/ | ||
510 | /* Interrupt Handlers */ | ||
511 | /**********************/ | ||
512 | |||
513 | /** | ||
514 | * xemaclite_tx_handler - Interrupt handler for frames sent | ||
515 | * @dev: Pointer to the network device | ||
516 | * | ||
517 | * This function updates the number of packets transmitted and handles the | ||
518 | * deferred skb, if there is one. | ||
519 | */ | ||
520 | static void xemaclite_tx_handler(struct net_device *dev) | ||
521 | { | ||
522 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
523 | |||
524 | dev->stats.tx_packets++; | ||
525 | if (lp->deferred_skb) { | ||
526 | if (xemaclite_send_data(lp, | ||
527 | (u8 *) lp->deferred_skb->data, | ||
528 | lp->deferred_skb->len) != 0) | ||
529 | return; | ||
530 | else { | ||
531 | dev->stats.tx_bytes += lp->deferred_skb->len; | ||
532 | dev_kfree_skb_irq(lp->deferred_skb); | ||
533 | lp->deferred_skb = NULL; | ||
534 | dev->trans_start = jiffies; | ||
535 | netif_wake_queue(dev); | ||
536 | } | ||
537 | } | ||
538 | } | ||
539 | |||
540 | /** | ||
541 | * xemaclite_rx_handler- Interrupt handler for frames received | ||
542 | * @dev: Pointer to the network device | ||
543 | * | ||
544 | * This function allocates memory for a socket buffer, fills it with data | ||
545 | * received and hands it over to the TCP/IP stack. | ||
546 | */ | ||
547 | static void xemaclite_rx_handler(struct net_device *dev) | ||
548 | { | ||
549 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
550 | struct sk_buff *skb; | ||
551 | unsigned int align; | ||
552 | u32 len; | ||
553 | |||
554 | len = ETH_FRAME_LEN + ETH_FCS_LEN; | ||
555 | skb = dev_alloc_skb(len + ALIGNMENT); | ||
556 | if (!skb) { | ||
557 | /* Couldn't get memory. */ | ||
558 | dev->stats.rx_dropped++; | ||
559 | dev_err(&lp->ndev->dev, "Could not allocate receive buffer\n"); | ||
560 | return; | ||
561 | } | ||
562 | |||
563 | /* | ||
564 | * A new skb should have the data halfword aligned, but this code is | ||
565 | * here just in case that isn't true. Calculate how many | ||
566 | * bytes we should reserve to get the data to start on a word | ||
567 | * boundary */ | ||
568 | align = BUFFER_ALIGN(skb->data); | ||
569 | if (align) | ||
570 | skb_reserve(skb, align); | ||
571 | |||
572 | skb_reserve(skb, 2); | ||
573 | |||
574 | len = xemaclite_recv_data(lp, (u8 *) skb->data); | ||
575 | |||
576 | if (!len) { | ||
577 | dev->stats.rx_errors++; | ||
578 | dev_kfree_skb_irq(skb); | ||
579 | return; | ||
580 | } | ||
581 | |||
582 | skb_put(skb, len); /* Tell the skb how much data we got */ | ||
583 | skb->dev = dev; /* Fill out required meta-data */ | ||
584 | |||
585 | skb->protocol = eth_type_trans(skb, dev); | ||
586 | skb->ip_summed = CHECKSUM_NONE; | ||
587 | |||
588 | dev->stats.rx_packets++; | ||
589 | dev->stats.rx_bytes += len; | ||
590 | dev->last_rx = jiffies; | ||
591 | |||
592 | netif_rx(skb); /* Send the packet upstream */ | ||
593 | } | ||
594 | |||
595 | /** | ||
596 | * xemaclite_interrupt - Interrupt handler for this driver | ||
597 | * @irq: Irq of the Emaclite device | ||
598 | * @dev_id: Void pointer to the network device instance used as callback | ||
599 | * reference | ||
600 | * | ||
601 | * This function handles the Tx and Rx interrupts of the EmacLite device. | ||
602 | */ | ||
603 | static irqreturn_t xemaclite_interrupt(int irq, void *dev_id) | ||
604 | { | ||
605 | bool tx_complete = 0; | ||
606 | struct net_device *dev = dev_id; | ||
607 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
608 | void __iomem *base_addr = lp->base_addr; | ||
609 | u32 tx_status; | ||
610 | |||
611 | /* Check if there is Rx Data available */ | ||
612 | if ((in_be32(base_addr + XEL_RSR_OFFSET) & XEL_RSR_RECV_DONE_MASK) || | ||
613 | (in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_RSR_OFFSET) | ||
614 | & XEL_RSR_RECV_DONE_MASK)) | ||
615 | |||
616 | xemaclite_rx_handler(dev); | ||
617 | |||
618 | /* Check if the Transmission for the first buffer is completed */ | ||
619 | tx_status = in_be32(base_addr + XEL_TSR_OFFSET); | ||
620 | if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) && | ||
621 | (tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) { | ||
622 | |||
623 | tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK; | ||
624 | out_be32(base_addr + XEL_TSR_OFFSET, tx_status); | ||
625 | |||
626 | tx_complete = 1; | ||
627 | } | ||
628 | |||
629 | /* Check if the Transmission for the second buffer is completed */ | ||
630 | tx_status = in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET); | ||
631 | if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) && | ||
632 | (tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) { | ||
633 | |||
634 | tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK; | ||
635 | out_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET, | ||
636 | tx_status); | ||
637 | |||
638 | tx_complete = 1; | ||
639 | } | ||
640 | |||
641 | /* If there was a Tx interrupt, call the Tx Handler */ | ||
642 | if (tx_complete != 0) | ||
643 | xemaclite_tx_handler(dev); | ||
644 | |||
645 | return IRQ_HANDLED; | ||
646 | } | ||
647 | |||
648 | /** | ||
649 | * xemaclite_open - Open the network device | ||
650 | * @dev: Pointer to the network device | ||
651 | * | ||
652 | * This function sets the MAC address, requests an IRQ and enables interrupts | ||
653 | * for the Emaclite device and starts the Tx queue. | ||
654 | */ | ||
655 | static int xemaclite_open(struct net_device *dev) | ||
656 | { | ||
657 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
658 | int retval; | ||
659 | |||
660 | /* Just to be safe, stop the device first */ | ||
661 | xemaclite_disable_interrupts(lp); | ||
662 | |||
663 | /* Set the MAC address each time opened */ | ||
664 | xemaclite_set_mac_address(lp, dev->dev_addr); | ||
665 | |||
666 | /* Grab the IRQ */ | ||
667 | retval = request_irq(dev->irq, &xemaclite_interrupt, 0, dev->name, dev); | ||
668 | if (retval) { | ||
669 | dev_err(&lp->ndev->dev, "Could not allocate interrupt %d\n", | ||
670 | dev->irq); | ||
671 | return retval; | ||
672 | } | ||
673 | |||
674 | /* Enable Interrupts */ | ||
675 | xemaclite_enable_interrupts(lp); | ||
676 | |||
677 | /* We're ready to go */ | ||
678 | netif_start_queue(dev); | ||
679 | |||
680 | return 0; | ||
681 | } | ||
682 | |||
683 | /** | ||
684 | * xemaclite_close - Close the network device | ||
685 | * @dev: Pointer to the network device | ||
686 | * | ||
687 | * This function stops the Tx queue, disables interrupts and frees the IRQ for | ||
688 | * the Emaclite device. | ||
689 | */ | ||
690 | static int xemaclite_close(struct net_device *dev) | ||
691 | { | ||
692 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
693 | |||
694 | netif_stop_queue(dev); | ||
695 | xemaclite_disable_interrupts(lp); | ||
696 | free_irq(dev->irq, dev); | ||
697 | |||
698 | return 0; | ||
699 | } | ||
700 | |||
701 | /** | ||
702 | * xemaclite_get_stats - Get the stats for the net_device | ||
703 | * @dev: Pointer to the network device | ||
704 | * | ||
705 | * This function returns the address of the 'net_device_stats' structure for the | ||
706 | * given network device. This structure holds usage statistics for the network | ||
707 | * device. | ||
708 | * | ||
709 | * Return: Pointer to the net_device_stats structure. | ||
710 | */ | ||
711 | static struct net_device_stats *xemaclite_get_stats(struct net_device *dev) | ||
712 | { | ||
713 | return &dev->stats; | ||
714 | } | ||
715 | |||
716 | /** | ||
717 | * xemaclite_send - Transmit a frame | ||
718 | * @orig_skb: Pointer to the socket buffer to be transmitted | ||
719 | * @dev: Pointer to the network device | ||
720 | * | ||
721 | * This function checks if the Tx buffer of the Emaclite device is free to send | ||
722 | * data. If so, it fills the Tx buffer with data from socket buffer data, | ||
723 | * updates the stats and frees the socket buffer. The Tx completion is signaled | ||
724 | * by an interrupt. If the Tx buffer isn't free, then the socket buffer is | ||
725 | * deferred and the Tx queue is stopped so that the deferred socket buffer can | ||
726 | * be transmitted when the Emaclite device is free to transmit data. | ||
727 | * | ||
728 | * Return: 0, always. | ||
729 | */ | ||
730 | static int xemaclite_send(struct sk_buff *orig_skb, struct net_device *dev) | ||
731 | { | ||
732 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
733 | struct sk_buff *new_skb; | ||
734 | unsigned int len; | ||
735 | unsigned long flags; | ||
736 | |||
737 | len = orig_skb->len; | ||
738 | |||
739 | new_skb = orig_skb; | ||
740 | |||
741 | spin_lock_irqsave(&lp->reset_lock, flags); | ||
742 | if (xemaclite_send_data(lp, (u8 *) new_skb->data, len) != 0) { | ||
743 | /* If the Emaclite Tx buffer is busy, stop the Tx queue and | ||
744 | * defer the skb for transmission at a later point when the | ||
745 | * current transmission is complete */ | ||
746 | netif_stop_queue(dev); | ||
747 | lp->deferred_skb = new_skb; | ||
748 | spin_unlock_irqrestore(&lp->reset_lock, flags); | ||
749 | return 0; | ||
750 | } | ||
751 | spin_unlock_irqrestore(&lp->reset_lock, flags); | ||
752 | |||
753 | dev->stats.tx_bytes += len; | ||
754 | dev_kfree_skb(new_skb); | ||
755 | dev->trans_start = jiffies; | ||
756 | |||
757 | return 0; | ||
758 | } | ||
759 | |||
760 | /** | ||
761 | * xemaclite_ioctl - Perform IO Control operations on the network device | ||
762 | * @dev: Pointer to the network device | ||
763 | * @rq: Pointer to the interface request structure | ||
764 | * @cmd: IOCTL command | ||
765 | * | ||
766 | * The only IOCTL operation supported by this function is setting the MAC | ||
767 | * address. An error is reported if any other operations are requested. | ||
768 | * | ||
769 | * Return: 0 to indicate success, or a negative error for failure. | ||
770 | */ | ||
771 | static int xemaclite_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | ||
772 | { | ||
773 | struct net_local *lp = (struct net_local *) netdev_priv(dev); | ||
774 | struct hw_addr_data *hw_addr = (struct hw_addr_data *) &rq->ifr_hwaddr; | ||
775 | |||
776 | switch (cmd) { | ||
777 | case SIOCETHTOOL: | ||
778 | return -EIO; | ||
779 | |||
780 | case SIOCSIFHWADDR: | ||
781 | dev_err(&lp->ndev->dev, "SIOCSIFHWADDR\n"); | ||
782 | |||
783 | /* Copy MAC address in from user space */ | ||
784 | copy_from_user((void __force *) dev->dev_addr, | ||
785 | (void __user __force *) hw_addr, | ||
786 | IFHWADDRLEN); | ||
787 | xemaclite_set_mac_address(lp, dev->dev_addr); | ||
788 | break; | ||
789 | default: | ||
790 | return -EOPNOTSUPP; | ||
791 | } | ||
792 | |||
793 | return 0; | ||
794 | } | ||
795 | |||
796 | /** | ||
797 | * xemaclite_remove_ndev - Free the network device | ||
798 | * @ndev: Pointer to the network device to be freed | ||
799 | * | ||
800 | * This function un maps the IO region of the Emaclite device and frees the net | ||
801 | * device. | ||
802 | */ | ||
803 | static void xemaclite_remove_ndev(struct net_device *ndev) | ||
804 | { | ||
805 | if (ndev) { | ||
806 | struct net_local *lp = (struct net_local *) netdev_priv(ndev); | ||
807 | |||
808 | if (lp->base_addr) | ||
809 | iounmap((void __iomem __force *) (lp->base_addr)); | ||
810 | free_netdev(ndev); | ||
811 | } | ||
812 | } | ||
813 | |||
814 | /** | ||
815 | * get_bool - Get a parameter from the OF device | ||
816 | * @ofdev: Pointer to OF device structure | ||
817 | * @s: Property to be retrieved | ||
818 | * | ||
819 | * This function looks for a property in the device node and returns the value | ||
820 | * of the property if its found or 0 if the property is not found. | ||
821 | * | ||
822 | * Return: Value of the parameter if the parameter is found, or 0 otherwise | ||
823 | */ | ||
824 | static bool get_bool(struct of_device *ofdev, const char *s) | ||
825 | { | ||
826 | u32 *p = (u32 *)of_get_property(ofdev->node, s, NULL); | ||
827 | |||
828 | if (p) { | ||
829 | return (bool)*p; | ||
830 | } else { | ||
831 | dev_warn(&ofdev->dev, "Parameter %s not found," | ||
832 | "defaulting to false\n", s); | ||
833 | return 0; | ||
834 | } | ||
835 | } | ||
836 | |||
837 | static struct net_device_ops xemaclite_netdev_ops; | ||
838 | |||
839 | /** | ||
840 | * xemaclite_of_probe - Probe method for the Emaclite device. | ||
841 | * @ofdev: Pointer to OF device structure | ||
842 | * @match: Pointer to the structure used for matching a device | ||
843 | * | ||
844 | * This function probes for the Emaclite device in the device tree. | ||
845 | * It initializes the driver data structure and the hardware, sets the MAC | ||
846 | * address and registers the network device. | ||
847 | * | ||
848 | * Return: 0, if the driver is bound to the Emaclite device, or | ||
849 | * a negative error if there is failure. | ||
850 | */ | ||
851 | static int __devinit xemaclite_of_probe(struct of_device *ofdev, | ||
852 | const struct of_device_id *match) | ||
853 | { | ||
854 | struct resource r_irq; /* Interrupt resources */ | ||
855 | struct resource r_mem; /* IO mem resources */ | ||
856 | struct net_device *ndev = NULL; | ||
857 | struct net_local *lp = NULL; | ||
858 | struct device *dev = &ofdev->dev; | ||
859 | const void *mac_address; | ||
860 | |||
861 | int rc = 0; | ||
862 | |||
863 | dev_info(dev, "Device Tree Probing\n"); | ||
864 | |||
865 | /* Get iospace for the device */ | ||
866 | rc = of_address_to_resource(ofdev->node, 0, &r_mem); | ||
867 | if (rc) { | ||
868 | dev_err(dev, "invalid address\n"); | ||
869 | return rc; | ||
870 | } | ||
871 | |||
872 | /* Get IRQ for the device */ | ||
873 | rc = of_irq_to_resource(ofdev->node, 0, &r_irq); | ||
874 | if (rc == NO_IRQ) { | ||
875 | dev_err(dev, "no IRQ found\n"); | ||
876 | return rc; | ||
877 | } | ||
878 | |||
879 | /* Create an ethernet device instance */ | ||
880 | ndev = alloc_etherdev(sizeof(struct net_local)); | ||
881 | if (!ndev) { | ||
882 | dev_err(dev, "Could not allocate network device\n"); | ||
883 | return -ENOMEM; | ||
884 | } | ||
885 | |||
886 | dev_set_drvdata(dev, ndev); | ||
887 | |||
888 | ndev->irq = r_irq.start; | ||
889 | ndev->mem_start = r_mem.start; | ||
890 | ndev->mem_end = r_mem.end; | ||
891 | |||
892 | lp = netdev_priv(ndev); | ||
893 | lp->ndev = ndev; | ||
894 | |||
895 | if (!request_mem_region(ndev->mem_start, | ||
896 | ndev->mem_end - ndev->mem_start + 1, | ||
897 | DRIVER_NAME)) { | ||
898 | dev_err(dev, "Couldn't lock memory region at %p\n", | ||
899 | (void *)ndev->mem_start); | ||
900 | rc = -EBUSY; | ||
901 | goto error2; | ||
902 | } | ||
903 | |||
904 | /* Get the virtual base address for the device */ | ||
905 | lp->base_addr = ioremap(r_mem.start, r_mem.end - r_mem.start + 1); | ||
906 | if (NULL == lp->base_addr) { | ||
907 | dev_err(dev, "EmacLite: Could not allocate iomem\n"); | ||
908 | rc = -EIO; | ||
909 | goto error1; | ||
910 | } | ||
911 | |||
912 | spin_lock_init(&lp->reset_lock); | ||
913 | lp->next_tx_buf_to_use = 0x0; | ||
914 | lp->next_rx_buf_to_use = 0x0; | ||
915 | lp->tx_ping_pong = get_bool(ofdev, "xlnx,tx-ping-pong"); | ||
916 | lp->rx_ping_pong = get_bool(ofdev, "xlnx,rx-ping-pong"); | ||
917 | mac_address = of_get_mac_address(ofdev->node); | ||
918 | |||
919 | if (mac_address) | ||
920 | /* Set the MAC address. */ | ||
921 | memcpy(ndev->dev_addr, mac_address, 6); | ||
922 | else | ||
923 | dev_warn(dev, "No MAC address found\n"); | ||
924 | |||
925 | /* Clear the Tx CSR's in case this is a restart */ | ||
926 | out_be32(lp->base_addr + XEL_TSR_OFFSET, 0); | ||
927 | out_be32(lp->base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET, 0); | ||
928 | |||
929 | /* Set the MAC address in the EmacLite device */ | ||
930 | xemaclite_set_mac_address(lp, ndev->dev_addr); | ||
931 | |||
932 | dev_info(dev, | ||
933 | "MAC address is now %2x:%2x:%2x:%2x:%2x:%2x\n", | ||
934 | ndev->dev_addr[0], ndev->dev_addr[1], | ||
935 | ndev->dev_addr[2], ndev->dev_addr[3], | ||
936 | ndev->dev_addr[4], ndev->dev_addr[5]); | ||
937 | |||
938 | ndev->netdev_ops = &xemaclite_netdev_ops; | ||
939 | ndev->flags &= ~IFF_MULTICAST; | ||
940 | ndev->watchdog_timeo = TX_TIMEOUT; | ||
941 | |||
942 | /* Finally, register the device */ | ||
943 | rc = register_netdev(ndev); | ||
944 | if (rc) { | ||
945 | dev_err(dev, | ||
946 | "Cannot register network device, aborting\n"); | ||
947 | goto error1; | ||
948 | } | ||
949 | |||
950 | dev_info(dev, | ||
951 | "Xilinx EmacLite at 0x%08X mapped to 0x%08X, irq=%d\n", | ||
952 | (unsigned int __force)ndev->mem_start, | ||
953 | (unsigned int __force)lp->base_addr, ndev->irq); | ||
954 | return 0; | ||
955 | |||
956 | error1: | ||
957 | release_mem_region(ndev->mem_start, r_mem.end - r_mem.start + 1); | ||
958 | |||
959 | error2: | ||
960 | xemaclite_remove_ndev(ndev); | ||
961 | return rc; | ||
962 | } | ||
963 | |||
964 | /** | ||
965 | * xemaclite_of_remove - Unbind the driver from the Emaclite device. | ||
966 | * @of_dev: Pointer to OF device structure | ||
967 | * | ||
968 | * This function is called if a device is physically removed from the system or | ||
969 | * if the driver module is being unloaded. It frees any resources allocated to | ||
970 | * the device. | ||
971 | * | ||
972 | * Return: 0, always. | ||
973 | */ | ||
974 | static int __devexit xemaclite_of_remove(struct of_device *of_dev) | ||
975 | { | ||
976 | struct device *dev = &of_dev->dev; | ||
977 | struct net_device *ndev = dev_get_drvdata(dev); | ||
978 | |||
979 | unregister_netdev(ndev); | ||
980 | |||
981 | release_mem_region(ndev->mem_start, ndev->mem_end-ndev->mem_start + 1); | ||
982 | |||
983 | xemaclite_remove_ndev(ndev); | ||
984 | |||
985 | dev_set_drvdata(dev, NULL); | ||
986 | |||
987 | return 0; | ||
988 | } | ||
989 | |||
990 | static struct net_device_ops xemaclite_netdev_ops = { | ||
991 | .ndo_open = xemaclite_open, | ||
992 | .ndo_stop = xemaclite_close, | ||
993 | .ndo_start_xmit = xemaclite_send, | ||
994 | .ndo_do_ioctl = xemaclite_ioctl, | ||
995 | .ndo_tx_timeout = xemaclite_tx_timeout, | ||
996 | .ndo_get_stats = xemaclite_get_stats, | ||
997 | }; | ||
998 | |||
999 | /* Match table for OF platform binding */ | ||
1000 | static struct of_device_id xemaclite_of_match[] __devinitdata = { | ||
1001 | { .compatible = "xlnx,opb-ethernetlite-1.01.a", }, | ||
1002 | { .compatible = "xlnx,opb-ethernetlite-1.01.b", }, | ||
1003 | { .compatible = "xlnx,xps-ethernetlite-1.00.a", }, | ||
1004 | { .compatible = "xlnx,xps-ethernetlite-2.00.a", }, | ||
1005 | { .compatible = "xlnx,xps-ethernetlite-2.01.a", }, | ||
1006 | { /* end of list */ }, | ||
1007 | }; | ||
1008 | MODULE_DEVICE_TABLE(of, xemaclite_of_match); | ||
1009 | |||
1010 | static struct of_platform_driver xemaclite_of_driver = { | ||
1011 | .name = DRIVER_NAME, | ||
1012 | .match_table = xemaclite_of_match, | ||
1013 | .probe = xemaclite_of_probe, | ||
1014 | .remove = __devexit_p(xemaclite_of_remove), | ||
1015 | }; | ||
1016 | |||
1017 | /** | ||
1018 | * xgpiopss_init - Initial driver registration call | ||
1019 | * | ||
1020 | * Return: 0 upon success, or a negative error upon failure. | ||
1021 | */ | ||
1022 | static int __init xemaclite_init(void) | ||
1023 | { | ||
1024 | /* No kernel boot options used, we just need to register the driver */ | ||
1025 | return of_register_platform_driver(&xemaclite_of_driver); | ||
1026 | } | ||
1027 | |||
1028 | /** | ||
1029 | * xemaclite_cleanup - Driver un-registration call | ||
1030 | */ | ||
1031 | static void __exit xemaclite_cleanup(void) | ||
1032 | { | ||
1033 | of_unregister_platform_driver(&xemaclite_of_driver); | ||
1034 | } | ||
1035 | |||
1036 | module_init(xemaclite_init); | ||
1037 | module_exit(xemaclite_cleanup); | ||
1038 | |||
1039 | MODULE_AUTHOR("Xilinx, Inc."); | ||
1040 | MODULE_DESCRIPTION("Xilinx Ethernet MAC Lite driver"); | ||
1041 | MODULE_LICENSE("GPL"); | ||