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a6286ee6 AG |
1 | /* |
2 | * DaVinci Ethernet Medium Access Controller | |
3 | * | |
4 | * DaVinci EMAC is based upon CPPI 3.0 TI DMA engine | |
5 | * | |
6 | * Copyright (C) 2009 Texas Instruments. | |
7 | * | |
8 | * --------------------------------------------------------------------------- | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * --------------------------------------------------------------------------- | |
24 | * History: | |
25 | * 0-5 A number of folks worked on this driver in bits and pieces but the major | |
26 | * contribution came from Suraj Iyer and Anant Gole | |
27 | * 6.0 Anant Gole - rewrote the driver as per Linux conventions | |
28 | * 6.1 Chaithrika U S - added support for Gigabit and RMII features, | |
29 | * PHY layer usage | |
30 | */ | |
31 | ||
32 | /** Pending Items in this driver: | |
33 | * 1. Use Linux cache infrastcture for DMA'ed memory (dma_xxx functions) | |
34 | */ | |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/timer.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/in.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/mm.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/init.h> | |
48 | #include <linux/netdevice.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/skbuff.h> | |
51 | #include <linux/ethtool.h> | |
52 | #include <linux/highmem.h> | |
53 | #include <linux/proc_fs.h> | |
54 | #include <linux/ctype.h> | |
55 | #include <linux/version.h> | |
56 | #include <linux/spinlock.h> | |
57 | #include <linux/dma-mapping.h> | |
58 | #include <linux/clk.h> | |
59 | #include <linux/platform_device.h> | |
60 | #include <linux/semaphore.h> | |
61 | #include <linux/phy.h> | |
62 | #include <linux/bitops.h> | |
63 | #include <linux/io.h> | |
64 | #include <linux/uaccess.h> | |
65 | ||
66 | #include <asm/irq.h> | |
67 | #include <asm/page.h> | |
68 | ||
69 | #include <mach/emac.h> | |
70 | ||
71 | static int debug_level; | |
72 | module_param(debug_level, int, 0); | |
73 | MODULE_PARM_DESC(debug_level, "DaVinci EMAC debug level (NETIF_MSG bits)"); | |
74 | ||
75 | /* Netif debug messages possible */ | |
76 | #define DAVINCI_EMAC_DEBUG (NETIF_MSG_DRV | \ | |
77 | NETIF_MSG_PROBE | \ | |
78 | NETIF_MSG_LINK | \ | |
79 | NETIF_MSG_TIMER | \ | |
80 | NETIF_MSG_IFDOWN | \ | |
81 | NETIF_MSG_IFUP | \ | |
82 | NETIF_MSG_RX_ERR | \ | |
83 | NETIF_MSG_TX_ERR | \ | |
84 | NETIF_MSG_TX_QUEUED | \ | |
85 | NETIF_MSG_INTR | \ | |
86 | NETIF_MSG_TX_DONE | \ | |
87 | NETIF_MSG_RX_STATUS | \ | |
88 | NETIF_MSG_PKTDATA | \ | |
89 | NETIF_MSG_HW | \ | |
90 | NETIF_MSG_WOL) | |
91 | ||
92 | /* version info */ | |
93 | #define EMAC_MAJOR_VERSION 6 | |
94 | #define EMAC_MINOR_VERSION 1 | |
95 | #define EMAC_MODULE_VERSION "6.1" | |
96 | MODULE_VERSION(EMAC_MODULE_VERSION); | |
97 | static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1"; | |
98 | ||
99 | /* Configuration items */ | |
100 | #define EMAC_DEF_PASS_CRC (0) /* Do not pass CRC upto frames */ | |
101 | #define EMAC_DEF_QOS_EN (0) /* EMAC proprietary QoS disabled */ | |
102 | #define EMAC_DEF_NO_BUFF_CHAIN (0) /* No buffer chain */ | |
103 | #define EMAC_DEF_MACCTRL_FRAME_EN (0) /* Discard Maccontrol frames */ | |
104 | #define EMAC_DEF_SHORT_FRAME_EN (0) /* Discard short frames */ | |
105 | #define EMAC_DEF_ERROR_FRAME_EN (0) /* Discard error frames */ | |
106 | #define EMAC_DEF_PROM_EN (0) /* Promiscous disabled */ | |
107 | #define EMAC_DEF_PROM_CH (0) /* Promiscous channel is 0 */ | |
108 | #define EMAC_DEF_BCAST_EN (1) /* Broadcast enabled */ | |
109 | #define EMAC_DEF_BCAST_CH (0) /* Broadcast channel is 0 */ | |
110 | #define EMAC_DEF_MCAST_EN (1) /* Multicast enabled */ | |
111 | #define EMAC_DEF_MCAST_CH (0) /* Multicast channel is 0 */ | |
112 | ||
113 | #define EMAC_DEF_TXPRIO_FIXED (1) /* TX Priority is fixed */ | |
114 | #define EMAC_DEF_TXPACING_EN (0) /* TX pacing NOT supported*/ | |
115 | ||
116 | #define EMAC_DEF_BUFFER_OFFSET (0) /* Buffer offset to DMA (future) */ | |
117 | #define EMAC_DEF_MIN_ETHPKTSIZE (60) /* Minimum ethernet pkt size */ | |
118 | #define EMAC_DEF_MAX_FRAME_SIZE (1500 + 14 + 4 + 4) | |
119 | #define EMAC_DEF_TX_CH (0) /* Default 0th channel */ | |
120 | #define EMAC_DEF_RX_CH (0) /* Default 0th channel */ | |
121 | #define EMAC_DEF_MDIO_TICK_MS (10) /* typically 1 tick=1 ms) */ | |
122 | #define EMAC_DEF_MAX_TX_CH (1) /* Max TX channels configured */ | |
123 | #define EMAC_DEF_MAX_RX_CH (1) /* Max RX channels configured */ | |
124 | #define EMAC_POLL_WEIGHT (64) /* Default NAPI poll weight */ | |
125 | ||
126 | /* Buffer descriptor parameters */ | |
127 | #define EMAC_DEF_TX_MAX_SERVICE (32) /* TX max service BD's */ | |
128 | #define EMAC_DEF_RX_MAX_SERVICE (64) /* should = netdev->weight */ | |
129 | ||
130 | /* EMAC register related defines */ | |
131 | #define EMAC_ALL_MULTI_REG_VALUE (0xFFFFFFFF) | |
132 | #define EMAC_NUM_MULTICAST_BITS (64) | |
133 | #define EMAC_TEARDOWN_VALUE (0xFFFFFFFC) | |
134 | #define EMAC_TX_CONTROL_TX_ENABLE_VAL (0x1) | |
135 | #define EMAC_RX_CONTROL_RX_ENABLE_VAL (0x1) | |
136 | #define EMAC_MAC_HOST_ERR_INTMASK_VAL (0x2) | |
137 | #define EMAC_RX_UNICAST_CLEAR_ALL (0xFF) | |
138 | #define EMAC_INT_MASK_CLEAR (0xFF) | |
139 | ||
140 | /* RX MBP register bit positions */ | |
141 | #define EMAC_RXMBP_PASSCRC_MASK BIT(30) | |
142 | #define EMAC_RXMBP_QOSEN_MASK BIT(29) | |
143 | #define EMAC_RXMBP_NOCHAIN_MASK BIT(28) | |
144 | #define EMAC_RXMBP_CMFEN_MASK BIT(24) | |
145 | #define EMAC_RXMBP_CSFEN_MASK BIT(23) | |
146 | #define EMAC_RXMBP_CEFEN_MASK BIT(22) | |
147 | #define EMAC_RXMBP_CAFEN_MASK BIT(21) | |
148 | #define EMAC_RXMBP_PROMCH_SHIFT (16) | |
149 | #define EMAC_RXMBP_PROMCH_MASK (0x7 << 16) | |
150 | #define EMAC_RXMBP_BROADEN_MASK BIT(13) | |
151 | #define EMAC_RXMBP_BROADCH_SHIFT (8) | |
152 | #define EMAC_RXMBP_BROADCH_MASK (0x7 << 8) | |
153 | #define EMAC_RXMBP_MULTIEN_MASK BIT(5) | |
154 | #define EMAC_RXMBP_MULTICH_SHIFT (0) | |
155 | #define EMAC_RXMBP_MULTICH_MASK (0x7) | |
156 | #define EMAC_RXMBP_CHMASK (0x7) | |
157 | ||
158 | /* EMAC register definitions/bit maps used */ | |
159 | # define EMAC_MBP_RXPROMISC (0x00200000) | |
160 | # define EMAC_MBP_PROMISCCH(ch) (((ch) & 0x7) << 16) | |
161 | # define EMAC_MBP_RXBCAST (0x00002000) | |
162 | # define EMAC_MBP_BCASTCHAN(ch) (((ch) & 0x7) << 8) | |
163 | # define EMAC_MBP_RXMCAST (0x00000020) | |
164 | # define EMAC_MBP_MCASTCHAN(ch) ((ch) & 0x7) | |
165 | ||
166 | /* EMAC mac_control register */ | |
167 | #define EMAC_MACCONTROL_TXPTYPE (0x200) | |
168 | #define EMAC_MACCONTROL_TXPACEEN (0x40) | |
169 | #define EMAC_MACCONTROL_MIIEN (0x20) | |
170 | #define EMAC_MACCONTROL_GIGABITEN (0x80) | |
171 | #define EMAC_MACCONTROL_GIGABITEN_SHIFT (7) | |
172 | #define EMAC_MACCONTROL_FULLDUPLEXEN (0x1) | |
173 | #define EMAC_MACCONTROL_RMIISPEED_MASK BIT(15) | |
174 | ||
175 | /* GIGABIT MODE related bits */ | |
176 | #define EMAC_DM646X_MACCONTORL_GMIIEN BIT(5) | |
177 | #define EMAC_DM646X_MACCONTORL_GIG BIT(7) | |
178 | #define EMAC_DM646X_MACCONTORL_GIGFORCE BIT(17) | |
179 | ||
180 | /* EMAC mac_status register */ | |
181 | #define EMAC_MACSTATUS_TXERRCODE_MASK (0xF00000) | |
182 | #define EMAC_MACSTATUS_TXERRCODE_SHIFT (20) | |
183 | #define EMAC_MACSTATUS_TXERRCH_MASK (0x7) | |
184 | #define EMAC_MACSTATUS_TXERRCH_SHIFT (16) | |
185 | #define EMAC_MACSTATUS_RXERRCODE_MASK (0xF000) | |
186 | #define EMAC_MACSTATUS_RXERRCODE_SHIFT (12) | |
187 | #define EMAC_MACSTATUS_RXERRCH_MASK (0x7) | |
188 | #define EMAC_MACSTATUS_RXERRCH_SHIFT (8) | |
189 | ||
190 | /* EMAC RX register masks */ | |
191 | #define EMAC_RX_MAX_LEN_MASK (0xFFFF) | |
192 | #define EMAC_RX_BUFFER_OFFSET_MASK (0xFFFF) | |
193 | ||
194 | /* MAC_IN_VECTOR (0x180) register bit fields */ | |
195 | #define EMAC_DM644X_MAC_IN_VECTOR_HOST_INT (0x20000) | |
196 | #define EMAC_DM644X_MAC_IN_VECTOR_STATPEND_INT (0x10000) | |
197 | #define EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC (0x0100) | |
198 | #define EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC (0x01) | |
199 | ||
200 | /** NOTE:: For DM646x the IN_VECTOR has changed */ | |
201 | #define EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC BIT(EMAC_DEF_RX_CH) | |
202 | #define EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC BIT(16 + EMAC_DEF_TX_CH) | |
203 | ||
204 | /* CPPI bit positions */ | |
205 | #define EMAC_CPPI_SOP_BIT BIT(31) | |
206 | #define EMAC_CPPI_EOP_BIT BIT(30) | |
207 | #define EMAC_CPPI_OWNERSHIP_BIT BIT(29) | |
208 | #define EMAC_CPPI_EOQ_BIT BIT(28) | |
209 | #define EMAC_CPPI_TEARDOWN_COMPLETE_BIT BIT(27) | |
210 | #define EMAC_CPPI_PASS_CRC_BIT BIT(26) | |
211 | #define EMAC_RX_BD_BUF_SIZE (0xFFFF) | |
212 | #define EMAC_BD_LENGTH_FOR_CACHE (16) /* only CPPI bytes */ | |
213 | #define EMAC_RX_BD_PKT_LENGTH_MASK (0xFFFF) | |
214 | ||
215 | /* Max hardware defines */ | |
216 | #define EMAC_MAX_TXRX_CHANNELS (8) /* Max hardware channels */ | |
217 | #define EMAC_DEF_MAX_MULTICAST_ADDRESSES (64) /* Max mcast addr's */ | |
218 | ||
219 | /* EMAC Peripheral Device Register Memory Layout structure */ | |
220 | #define EMAC_TXIDVER 0x0 | |
221 | #define EMAC_TXCONTROL 0x4 | |
222 | #define EMAC_TXTEARDOWN 0x8 | |
223 | #define EMAC_RXIDVER 0x10 | |
224 | #define EMAC_RXCONTROL 0x14 | |
225 | #define EMAC_RXTEARDOWN 0x18 | |
226 | #define EMAC_TXINTSTATRAW 0x80 | |
227 | #define EMAC_TXINTSTATMASKED 0x84 | |
228 | #define EMAC_TXINTMASKSET 0x88 | |
229 | #define EMAC_TXINTMASKCLEAR 0x8C | |
230 | #define EMAC_MACINVECTOR 0x90 | |
231 | ||
232 | #define EMAC_DM646X_MACEOIVECTOR 0x94 | |
233 | ||
234 | #define EMAC_RXINTSTATRAW 0xA0 | |
235 | #define EMAC_RXINTSTATMASKED 0xA4 | |
236 | #define EMAC_RXINTMASKSET 0xA8 | |
237 | #define EMAC_RXINTMASKCLEAR 0xAC | |
238 | #define EMAC_MACINTSTATRAW 0xB0 | |
239 | #define EMAC_MACINTSTATMASKED 0xB4 | |
240 | #define EMAC_MACINTMASKSET 0xB8 | |
241 | #define EMAC_MACINTMASKCLEAR 0xBC | |
242 | ||
243 | #define EMAC_RXMBPENABLE 0x100 | |
244 | #define EMAC_RXUNICASTSET 0x104 | |
245 | #define EMAC_RXUNICASTCLEAR 0x108 | |
246 | #define EMAC_RXMAXLEN 0x10C | |
247 | #define EMAC_RXBUFFEROFFSET 0x110 | |
248 | #define EMAC_RXFILTERLOWTHRESH 0x114 | |
249 | ||
250 | #define EMAC_MACCONTROL 0x160 | |
251 | #define EMAC_MACSTATUS 0x164 | |
252 | #define EMAC_EMCONTROL 0x168 | |
253 | #define EMAC_FIFOCONTROL 0x16C | |
254 | #define EMAC_MACCONFIG 0x170 | |
255 | #define EMAC_SOFTRESET 0x174 | |
256 | #define EMAC_MACSRCADDRLO 0x1D0 | |
257 | #define EMAC_MACSRCADDRHI 0x1D4 | |
258 | #define EMAC_MACHASH1 0x1D8 | |
259 | #define EMAC_MACHASH2 0x1DC | |
260 | #define EMAC_MACADDRLO 0x500 | |
261 | #define EMAC_MACADDRHI 0x504 | |
262 | #define EMAC_MACINDEX 0x508 | |
263 | ||
264 | /* EMAC HDP and Completion registors */ | |
265 | #define EMAC_TXHDP(ch) (0x600 + (ch * 4)) | |
266 | #define EMAC_RXHDP(ch) (0x620 + (ch * 4)) | |
267 | #define EMAC_TXCP(ch) (0x640 + (ch * 4)) | |
268 | #define EMAC_RXCP(ch) (0x660 + (ch * 4)) | |
269 | ||
270 | /* EMAC statistics registers */ | |
271 | #define EMAC_RXGOODFRAMES 0x200 | |
272 | #define EMAC_RXBCASTFRAMES 0x204 | |
273 | #define EMAC_RXMCASTFRAMES 0x208 | |
274 | #define EMAC_RXPAUSEFRAMES 0x20C | |
275 | #define EMAC_RXCRCERRORS 0x210 | |
276 | #define EMAC_RXALIGNCODEERRORS 0x214 | |
277 | #define EMAC_RXOVERSIZED 0x218 | |
278 | #define EMAC_RXJABBER 0x21C | |
279 | #define EMAC_RXUNDERSIZED 0x220 | |
280 | #define EMAC_RXFRAGMENTS 0x224 | |
281 | #define EMAC_RXFILTERED 0x228 | |
282 | #define EMAC_RXQOSFILTERED 0x22C | |
283 | #define EMAC_RXOCTETS 0x230 | |
284 | #define EMAC_TXGOODFRAMES 0x234 | |
285 | #define EMAC_TXBCASTFRAMES 0x238 | |
286 | #define EMAC_TXMCASTFRAMES 0x23C | |
287 | #define EMAC_TXPAUSEFRAMES 0x240 | |
288 | #define EMAC_TXDEFERRED 0x244 | |
289 | #define EMAC_TXCOLLISION 0x248 | |
290 | #define EMAC_TXSINGLECOLL 0x24C | |
291 | #define EMAC_TXMULTICOLL 0x250 | |
292 | #define EMAC_TXEXCESSIVECOLL 0x254 | |
293 | #define EMAC_TXLATECOLL 0x258 | |
294 | #define EMAC_TXUNDERRUN 0x25C | |
295 | #define EMAC_TXCARRIERSENSE 0x260 | |
296 | #define EMAC_TXOCTETS 0x264 | |
297 | #define EMAC_NETOCTETS 0x280 | |
298 | #define EMAC_RXSOFOVERRUNS 0x284 | |
299 | #define EMAC_RXMOFOVERRUNS 0x288 | |
300 | #define EMAC_RXDMAOVERRUNS 0x28C | |
301 | ||
302 | /* EMAC DM644x control registers */ | |
303 | #define EMAC_CTRL_EWCTL (0x4) | |
304 | #define EMAC_CTRL_EWINTTCNT (0x8) | |
305 | ||
306 | /* EMAC MDIO related */ | |
307 | /* Mask & Control defines */ | |
308 | #define MDIO_CONTROL_CLKDIV (0xFF) | |
309 | #define MDIO_CONTROL_ENABLE BIT(30) | |
310 | #define MDIO_USERACCESS_GO BIT(31) | |
311 | #define MDIO_USERACCESS_WRITE BIT(30) | |
312 | #define MDIO_USERACCESS_READ (0) | |
313 | #define MDIO_USERACCESS_REGADR (0x1F << 21) | |
314 | #define MDIO_USERACCESS_PHYADR (0x1F << 16) | |
315 | #define MDIO_USERACCESS_DATA (0xFFFF) | |
316 | #define MDIO_USERPHYSEL_LINKSEL BIT(7) | |
317 | #define MDIO_VER_MODID (0xFFFF << 16) | |
318 | #define MDIO_VER_REVMAJ (0xFF << 8) | |
319 | #define MDIO_VER_REVMIN (0xFF) | |
320 | ||
321 | #define MDIO_USERACCESS(inst) (0x80 + (inst * 8)) | |
322 | #define MDIO_USERPHYSEL(inst) (0x84 + (inst * 8)) | |
323 | #define MDIO_CONTROL (0x04) | |
324 | ||
325 | /* EMAC DM646X control module registers */ | |
326 | #define EMAC_DM646X_CMRXINTEN (0x14) | |
327 | #define EMAC_DM646X_CMTXINTEN (0x18) | |
328 | ||
329 | /* EMAC EOI codes for C0 */ | |
330 | #define EMAC_DM646X_MAC_EOI_C0_RXEN (0x01) | |
331 | #define EMAC_DM646X_MAC_EOI_C0_TXEN (0x02) | |
332 | ||
333 | /** net_buf_obj: EMAC network bufferdata structure | |
334 | * | |
335 | * EMAC network buffer data structure | |
336 | */ | |
337 | struct emac_netbufobj { | |
338 | void *buf_token; | |
339 | char *data_ptr; | |
340 | int length; | |
341 | }; | |
342 | ||
343 | /** net_pkt_obj: EMAC network packet data structure | |
344 | * | |
345 | * EMAC network packet data structure - supports buffer list (for future) | |
346 | */ | |
347 | struct emac_netpktobj { | |
348 | void *pkt_token; /* data token may hold tx/rx chan id */ | |
349 | struct emac_netbufobj *buf_list; /* array of network buffer objects */ | |
350 | int num_bufs; | |
351 | int pkt_length; | |
352 | }; | |
353 | ||
354 | /** emac_tx_bd: EMAC TX Buffer descriptor data structure | |
355 | * | |
356 | * EMAC TX Buffer descriptor data structure | |
357 | */ | |
358 | struct emac_tx_bd { | |
359 | int h_next; | |
360 | int buff_ptr; | |
361 | int off_b_len; | |
362 | int mode; /* SOP, EOP, ownership, EOQ, teardown,Qstarv, length */ | |
363 | struct emac_tx_bd __iomem *next; | |
364 | void *buf_token; | |
365 | }; | |
366 | ||
367 | /** emac_txch: EMAC TX Channel data structure | |
368 | * | |
369 | * EMAC TX Channel data structure | |
370 | */ | |
371 | struct emac_txch { | |
372 | /* Config related */ | |
373 | u32 num_bd; | |
374 | u32 service_max; | |
375 | ||
376 | /* CPPI specific */ | |
377 | u32 alloc_size; | |
378 | void __iomem *bd_mem; | |
379 | struct emac_tx_bd __iomem *bd_pool_head; | |
380 | struct emac_tx_bd __iomem *active_queue_head; | |
381 | struct emac_tx_bd __iomem *active_queue_tail; | |
382 | struct emac_tx_bd __iomem *last_hw_bdprocessed; | |
383 | u32 queue_active; | |
384 | u32 teardown_pending; | |
385 | u32 *tx_complete; | |
386 | ||
387 | /** statistics */ | |
388 | u32 proc_count; /* TX: # of times emac_tx_bdproc is called */ | |
389 | u32 mis_queued_packets; | |
390 | u32 queue_reinit; | |
391 | u32 end_of_queue_add; | |
392 | u32 out_of_tx_bd; | |
393 | u32 no_active_pkts; /* IRQ when there were no packets to process */ | |
394 | u32 active_queue_count; | |
395 | }; | |
396 | ||
397 | /** emac_rx_bd: EMAC RX Buffer descriptor data structure | |
398 | * | |
399 | * EMAC RX Buffer descriptor data structure | |
400 | */ | |
401 | struct emac_rx_bd { | |
402 | int h_next; | |
403 | int buff_ptr; | |
404 | int off_b_len; | |
405 | int mode; | |
406 | struct emac_rx_bd __iomem *next; | |
407 | void *data_ptr; | |
408 | void *buf_token; | |
409 | }; | |
410 | ||
411 | /** emac_rxch: EMAC RX Channel data structure | |
412 | * | |
413 | * EMAC RX Channel data structure | |
414 | */ | |
415 | struct emac_rxch { | |
416 | /* configuration info */ | |
417 | u32 num_bd; | |
418 | u32 service_max; | |
419 | u32 buf_size; | |
420 | char mac_addr[6]; | |
421 | ||
422 | /** CPPI specific */ | |
423 | u32 alloc_size; | |
424 | void __iomem *bd_mem; | |
425 | struct emac_rx_bd __iomem *bd_pool_head; | |
426 | struct emac_rx_bd __iomem *active_queue_head; | |
427 | struct emac_rx_bd __iomem *active_queue_tail; | |
428 | u32 queue_active; | |
429 | u32 teardown_pending; | |
430 | ||
431 | /* packet and buffer objects */ | |
432 | struct emac_netpktobj pkt_queue; | |
433 | struct emac_netbufobj buf_queue; | |
434 | ||
435 | /** statistics */ | |
436 | u32 proc_count; /* number of times emac_rx_bdproc is called */ | |
437 | u32 processed_bd; | |
438 | u32 recycled_bd; | |
439 | u32 out_of_rx_bd; | |
440 | u32 out_of_rx_buffers; | |
441 | u32 queue_reinit; | |
442 | u32 end_of_queue_add; | |
443 | u32 end_of_queue; | |
444 | u32 mis_queued_packets; | |
445 | }; | |
446 | ||
447 | /* emac_priv: EMAC private data structure | |
448 | * | |
449 | * EMAC adapter private data structure | |
450 | */ | |
451 | struct emac_priv { | |
452 | u32 msg_enable; | |
453 | struct net_device *ndev; | |
454 | struct platform_device *pdev; | |
455 | struct napi_struct napi; | |
456 | char mac_addr[6]; | |
457 | spinlock_t tx_lock; | |
458 | spinlock_t rx_lock; | |
459 | void __iomem *remap_addr; | |
460 | u32 emac_base_phys; | |
461 | void __iomem *emac_base; | |
462 | void __iomem *ctrl_base; | |
463 | void __iomem *emac_ctrl_ram; | |
464 | u32 ctrl_ram_size; | |
465 | struct emac_txch *txch[EMAC_DEF_MAX_TX_CH]; | |
466 | struct emac_rxch *rxch[EMAC_DEF_MAX_RX_CH]; | |
467 | u32 link; /* 1=link on, 0=link off */ | |
468 | u32 speed; /* 0=Auto Neg, 1=No PHY, 10,100, 1000 - mbps */ | |
469 | u32 duplex; /* Link duplex: 0=Half, 1=Full */ | |
470 | u32 rx_buf_size; | |
471 | u32 isr_count; | |
472 | u8 rmii_en; | |
473 | u8 version; | |
474 | struct net_device_stats net_dev_stats; | |
475 | u32 mac_hash1; | |
476 | u32 mac_hash2; | |
477 | u32 multicast_hash_cnt[EMAC_NUM_MULTICAST_BITS]; | |
478 | u32 rx_addr_type; | |
479 | /* periodic timer required for MDIO polling */ | |
480 | struct timer_list periodic_timer; | |
481 | u32 periodic_ticks; | |
482 | u32 timer_active; | |
483 | u32 phy_mask; | |
484 | /* mii_bus,phy members */ | |
485 | struct mii_bus *mii_bus; | |
486 | struct phy_device *phydev; | |
487 | spinlock_t lock; | |
488 | }; | |
489 | ||
490 | /* clock frequency for EMAC */ | |
491 | static struct clk *emac_clk; | |
492 | static unsigned long emac_bus_frequency; | |
493 | static unsigned long mdio_max_freq; | |
494 | ||
495 | /* EMAC internal utility function */ | |
496 | static inline u32 emac_virt_to_phys(void __iomem *addr) | |
497 | { | |
498 | return (u32 __force) io_v2p(addr); | |
499 | } | |
500 | ||
501 | /* Cache macros - Packet buffers would be from skb pool which is cached */ | |
502 | #define EMAC_VIRT_NOCACHE(addr) (addr) | |
503 | #define EMAC_CACHE_INVALIDATE(addr, size) \ | |
504 | dma_cache_maint((void *)addr, size, DMA_FROM_DEVICE) | |
505 | #define EMAC_CACHE_WRITEBACK(addr, size) \ | |
506 | dma_cache_maint((void *)addr, size, DMA_TO_DEVICE) | |
507 | #define EMAC_CACHE_WRITEBACK_INVALIDATE(addr, size) \ | |
508 | dma_cache_maint((void *)addr, size, DMA_BIDIRECTIONAL) | |
509 | ||
510 | /* DM644x does not have BD's in cached memory - so no cache functions */ | |
511 | #define BD_CACHE_INVALIDATE(addr, size) | |
512 | #define BD_CACHE_WRITEBACK(addr, size) | |
513 | #define BD_CACHE_WRITEBACK_INVALIDATE(addr, size) | |
514 | ||
515 | /* EMAC TX Host Error description strings */ | |
516 | static char *emac_txhost_errcodes[16] = { | |
517 | "No error", "SOP error", "Ownership bit not set in SOP buffer", | |
518 | "Zero Next Buffer Descriptor Pointer Without EOP", | |
519 | "Zero Buffer Pointer", "Zero Buffer Length", "Packet Length Error", | |
520 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
521 | "Reserved", "Reserved", "Reserved", "Reserved" | |
522 | }; | |
523 | ||
524 | /* EMAC RX Host Error description strings */ | |
525 | static char *emac_rxhost_errcodes[16] = { | |
526 | "No error", "Reserved", "Ownership bit not set in input buffer", | |
527 | "Reserved", "Zero Buffer Pointer", "Reserved", "Reserved", | |
528 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
529 | "Reserved", "Reserved", "Reserved", "Reserved" | |
530 | }; | |
531 | ||
532 | /* Helper macros */ | |
533 | #define emac_read(reg) ioread32(priv->emac_base + (reg)) | |
534 | #define emac_write(reg, val) iowrite32(val, priv->emac_base + (reg)) | |
535 | ||
536 | #define emac_ctrl_read(reg) ioread32((priv->ctrl_base + (reg))) | |
537 | #define emac_ctrl_write(reg, val) iowrite32(val, (priv->ctrl_base + (reg))) | |
538 | ||
539 | #define emac_mdio_read(reg) ioread32(bus->priv + (reg)) | |
540 | #define emac_mdio_write(reg, val) iowrite32(val, (bus->priv + (reg))) | |
541 | ||
542 | /** | |
543 | * emac_dump_regs: Dump important EMAC registers to debug terminal | |
544 | * @priv: The DaVinci EMAC private adapter structure | |
545 | * | |
546 | * Executes ethtool set cmd & sets phy mode | |
547 | * | |
548 | */ | |
549 | static void emac_dump_regs(struct emac_priv *priv) | |
550 | { | |
551 | struct device *emac_dev = &priv->ndev->dev; | |
552 | ||
553 | /* Print important registers in EMAC */ | |
554 | dev_info(emac_dev, "EMAC Basic registers\n"); | |
555 | dev_info(emac_dev, "EMAC: EWCTL: %08X, EWINTTCNT: %08X\n", | |
556 | emac_ctrl_read(EMAC_CTRL_EWCTL), | |
557 | emac_ctrl_read(EMAC_CTRL_EWINTTCNT)); | |
558 | dev_info(emac_dev, "EMAC: TXID: %08X %s, RXID: %08X %s\n", | |
559 | emac_read(EMAC_TXIDVER), | |
560 | ((emac_read(EMAC_TXCONTROL)) ? "enabled" : "disabled"), | |
561 | emac_read(EMAC_RXIDVER), | |
562 | ((emac_read(EMAC_RXCONTROL)) ? "enabled" : "disabled")); | |
563 | dev_info(emac_dev, "EMAC: TXIntRaw:%08X, TxIntMasked: %08X, "\ | |
564 | "TxIntMasSet: %08X\n", emac_read(EMAC_TXINTSTATRAW), | |
565 | emac_read(EMAC_TXINTSTATMASKED), emac_read(EMAC_TXINTMASKSET)); | |
566 | dev_info(emac_dev, "EMAC: RXIntRaw:%08X, RxIntMasked: %08X, "\ | |
567 | "RxIntMasSet: %08X\n", emac_read(EMAC_RXINTSTATRAW), | |
568 | emac_read(EMAC_RXINTSTATMASKED), emac_read(EMAC_RXINTMASKSET)); | |
569 | dev_info(emac_dev, "EMAC: MacIntRaw:%08X, MacIntMasked: %08X, "\ | |
570 | "MacInVector=%08X\n", emac_read(EMAC_MACINTSTATRAW), | |
571 | emac_read(EMAC_MACINTSTATMASKED), emac_read(EMAC_MACINVECTOR)); | |
572 | dev_info(emac_dev, "EMAC: EmuControl:%08X, FifoControl: %08X\n", | |
573 | emac_read(EMAC_EMCONTROL), emac_read(EMAC_FIFOCONTROL)); | |
574 | dev_info(emac_dev, "EMAC: MBPEnable:%08X, RXUnicastSet: %08X, "\ | |
575 | "RXMaxLen=%08X\n", emac_read(EMAC_RXMBPENABLE), | |
576 | emac_read(EMAC_RXUNICASTSET), emac_read(EMAC_RXMAXLEN)); | |
577 | dev_info(emac_dev, "EMAC: MacControl:%08X, MacStatus: %08X, "\ | |
578 | "MacConfig=%08X\n", emac_read(EMAC_MACCONTROL), | |
579 | emac_read(EMAC_MACSTATUS), emac_read(EMAC_MACCONFIG)); | |
580 | dev_info(emac_dev, "EMAC: TXHDP[0]:%08X, RXHDP[0]: %08X\n", | |
581 | emac_read(EMAC_TXHDP(0)), emac_read(EMAC_RXHDP(0))); | |
582 | dev_info(emac_dev, "EMAC Statistics\n"); | |
583 | dev_info(emac_dev, "EMAC: rx_good_frames:%d\n", | |
584 | emac_read(EMAC_RXGOODFRAMES)); | |
585 | dev_info(emac_dev, "EMAC: rx_broadcast_frames:%d\n", | |
586 | emac_read(EMAC_RXBCASTFRAMES)); | |
587 | dev_info(emac_dev, "EMAC: rx_multicast_frames:%d\n", | |
588 | emac_read(EMAC_RXMCASTFRAMES)); | |
589 | dev_info(emac_dev, "EMAC: rx_pause_frames:%d\n", | |
590 | emac_read(EMAC_RXPAUSEFRAMES)); | |
591 | dev_info(emac_dev, "EMAC: rx_crcerrors:%d\n", | |
592 | emac_read(EMAC_RXCRCERRORS)); | |
593 | dev_info(emac_dev, "EMAC: rx_align_code_errors:%d\n", | |
594 | emac_read(EMAC_RXALIGNCODEERRORS)); | |
595 | dev_info(emac_dev, "EMAC: rx_oversized_frames:%d\n", | |
596 | emac_read(EMAC_RXOVERSIZED)); | |
597 | dev_info(emac_dev, "EMAC: rx_jabber_frames:%d\n", | |
598 | emac_read(EMAC_RXJABBER)); | |
599 | dev_info(emac_dev, "EMAC: rx_undersized_frames:%d\n", | |
600 | emac_read(EMAC_RXUNDERSIZED)); | |
601 | dev_info(emac_dev, "EMAC: rx_fragments:%d\n", | |
602 | emac_read(EMAC_RXFRAGMENTS)); | |
603 | dev_info(emac_dev, "EMAC: rx_filtered_frames:%d\n", | |
604 | emac_read(EMAC_RXFILTERED)); | |
605 | dev_info(emac_dev, "EMAC: rx_qos_filtered_frames:%d\n", | |
606 | emac_read(EMAC_RXQOSFILTERED)); | |
607 | dev_info(emac_dev, "EMAC: rx_octets:%d\n", | |
608 | emac_read(EMAC_RXOCTETS)); | |
609 | dev_info(emac_dev, "EMAC: tx_goodframes:%d\n", | |
610 | emac_read(EMAC_TXGOODFRAMES)); | |
611 | dev_info(emac_dev, "EMAC: tx_bcastframes:%d\n", | |
612 | emac_read(EMAC_TXBCASTFRAMES)); | |
613 | dev_info(emac_dev, "EMAC: tx_mcastframes:%d\n", | |
614 | emac_read(EMAC_TXMCASTFRAMES)); | |
615 | dev_info(emac_dev, "EMAC: tx_pause_frames:%d\n", | |
616 | emac_read(EMAC_TXPAUSEFRAMES)); | |
617 | dev_info(emac_dev, "EMAC: tx_deferred_frames:%d\n", | |
618 | emac_read(EMAC_TXDEFERRED)); | |
619 | dev_info(emac_dev, "EMAC: tx_collision_frames:%d\n", | |
620 | emac_read(EMAC_TXCOLLISION)); | |
621 | dev_info(emac_dev, "EMAC: tx_single_coll_frames:%d\n", | |
622 | emac_read(EMAC_TXSINGLECOLL)); | |
623 | dev_info(emac_dev, "EMAC: tx_mult_coll_frames:%d\n", | |
624 | emac_read(EMAC_TXMULTICOLL)); | |
625 | dev_info(emac_dev, "EMAC: tx_excessive_collisions:%d\n", | |
626 | emac_read(EMAC_TXEXCESSIVECOLL)); | |
627 | dev_info(emac_dev, "EMAC: tx_late_collisions:%d\n", | |
628 | emac_read(EMAC_TXLATECOLL)); | |
629 | dev_info(emac_dev, "EMAC: tx_underrun:%d\n", | |
630 | emac_read(EMAC_TXUNDERRUN)); | |
631 | dev_info(emac_dev, "EMAC: tx_carrier_sense_errors:%d\n", | |
632 | emac_read(EMAC_TXCARRIERSENSE)); | |
633 | dev_info(emac_dev, "EMAC: tx_octets:%d\n", | |
634 | emac_read(EMAC_TXOCTETS)); | |
635 | dev_info(emac_dev, "EMAC: net_octets:%d\n", | |
636 | emac_read(EMAC_NETOCTETS)); | |
637 | dev_info(emac_dev, "EMAC: rx_sof_overruns:%d\n", | |
638 | emac_read(EMAC_RXSOFOVERRUNS)); | |
639 | dev_info(emac_dev, "EMAC: rx_mof_overruns:%d\n", | |
640 | emac_read(EMAC_RXMOFOVERRUNS)); | |
641 | dev_info(emac_dev, "EMAC: rx_dma_overruns:%d\n", | |
642 | emac_read(EMAC_RXDMAOVERRUNS)); | |
643 | } | |
644 | ||
645 | /************************************************************************* | |
646 | * EMAC MDIO/Phy Functionality | |
647 | *************************************************************************/ | |
648 | /** | |
649 | * emac_get_drvinfo: Get EMAC driver information | |
650 | * @ndev: The DaVinci EMAC network adapter | |
651 | * @info: ethtool info structure containing name and version | |
652 | * | |
653 | * Returns EMAC driver information (name and version) | |
654 | * | |
655 | */ | |
656 | static void emac_get_drvinfo(struct net_device *ndev, | |
657 | struct ethtool_drvinfo *info) | |
658 | { | |
659 | strcpy(info->driver, emac_version_string); | |
660 | strcpy(info->version, EMAC_MODULE_VERSION); | |
661 | } | |
662 | ||
663 | /** | |
664 | * emac_get_settings: Get EMAC settings | |
665 | * @ndev: The DaVinci EMAC network adapter | |
666 | * @ecmd: ethtool command | |
667 | * | |
668 | * Executes ethool get command | |
669 | * | |
670 | */ | |
671 | static int emac_get_settings(struct net_device *ndev, | |
672 | struct ethtool_cmd *ecmd) | |
673 | { | |
674 | struct emac_priv *priv = netdev_priv(ndev); | |
675 | if (priv->phy_mask) | |
676 | return phy_ethtool_gset(priv->phydev, ecmd); | |
677 | else | |
678 | return -EOPNOTSUPP; | |
679 | ||
680 | } | |
681 | ||
682 | /** | |
683 | * emac_set_settings: Set EMAC settings | |
684 | * @ndev: The DaVinci EMAC network adapter | |
685 | * @ecmd: ethtool command | |
686 | * | |
687 | * Executes ethool set command | |
688 | * | |
689 | */ | |
690 | static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) | |
691 | { | |
692 | struct emac_priv *priv = netdev_priv(ndev); | |
693 | if (priv->phy_mask) | |
694 | return phy_ethtool_sset(priv->phydev, ecmd); | |
695 | else | |
696 | return -EOPNOTSUPP; | |
697 | ||
698 | } | |
699 | ||
700 | /** | |
701 | * ethtool_ops: DaVinci EMAC Ethtool structure | |
702 | * | |
703 | * Ethtool support for EMAC adapter | |
704 | * | |
705 | */ | |
706 | static const struct ethtool_ops ethtool_ops = { | |
707 | .get_drvinfo = emac_get_drvinfo, | |
708 | .get_settings = emac_get_settings, | |
709 | .set_settings = emac_set_settings, | |
710 | .get_link = ethtool_op_get_link, | |
711 | }; | |
712 | ||
713 | /** | |
714 | * emac_update_phystatus: Update Phy status | |
715 | * @priv: The DaVinci EMAC private adapter structure | |
716 | * | |
717 | * Updates phy status and takes action for network queue if required | |
718 | * based upon link status | |
719 | * | |
720 | */ | |
721 | static void emac_update_phystatus(struct emac_priv *priv) | |
722 | { | |
723 | u32 mac_control; | |
724 | u32 new_duplex; | |
725 | u32 cur_duplex; | |
726 | struct net_device *ndev = priv->ndev; | |
727 | ||
728 | mac_control = emac_read(EMAC_MACCONTROL); | |
729 | cur_duplex = (mac_control & EMAC_MACCONTROL_FULLDUPLEXEN) ? | |
730 | DUPLEX_FULL : DUPLEX_HALF; | |
731 | if (priv->phy_mask) | |
732 | new_duplex = priv->phydev->duplex; | |
733 | else | |
734 | new_duplex = DUPLEX_FULL; | |
735 | ||
736 | /* We get called only if link has changed (speed/duplex/status) */ | |
737 | if ((priv->link) && (new_duplex != cur_duplex)) { | |
738 | priv->duplex = new_duplex; | |
739 | if (DUPLEX_FULL == priv->duplex) | |
740 | mac_control |= (EMAC_MACCONTROL_FULLDUPLEXEN); | |
741 | else | |
742 | mac_control &= ~(EMAC_MACCONTROL_FULLDUPLEXEN); | |
743 | } | |
744 | ||
745 | if (priv->speed == SPEED_1000 && (priv->version == EMAC_VERSION_2)) { | |
746 | mac_control = emac_read(EMAC_MACCONTROL); | |
747 | mac_control |= (EMAC_DM646X_MACCONTORL_GMIIEN | | |
748 | EMAC_DM646X_MACCONTORL_GIG | | |
749 | EMAC_DM646X_MACCONTORL_GIGFORCE); | |
750 | } else { | |
751 | /* Clear the GIG bit and GIGFORCE bit */ | |
752 | mac_control &= ~(EMAC_DM646X_MACCONTORL_GIGFORCE | | |
753 | EMAC_DM646X_MACCONTORL_GIG); | |
754 | ||
755 | if (priv->rmii_en && (priv->speed == SPEED_100)) | |
756 | mac_control |= EMAC_MACCONTROL_RMIISPEED_MASK; | |
757 | else | |
758 | mac_control &= ~EMAC_MACCONTROL_RMIISPEED_MASK; | |
759 | } | |
760 | ||
761 | /* Update mac_control if changed */ | |
762 | emac_write(EMAC_MACCONTROL, mac_control); | |
763 | ||
764 | if (priv->link) { | |
765 | /* link ON */ | |
766 | if (!netif_carrier_ok(ndev)) | |
767 | netif_carrier_on(ndev); | |
768 | /* reactivate the transmit queue if it is stopped */ | |
769 | if (netif_running(ndev) && netif_queue_stopped(ndev)) | |
770 | netif_wake_queue(ndev); | |
771 | } else { | |
772 | /* link OFF */ | |
773 | if (netif_carrier_ok(ndev)) | |
774 | netif_carrier_off(ndev); | |
775 | if (!netif_queue_stopped(ndev)) | |
776 | netif_stop_queue(ndev); | |
777 | } | |
778 | } | |
779 | ||
780 | /** | |
781 | * hash_get: Calculate hash value from mac address | |
782 | * @addr: mac address to delete from hash table | |
783 | * | |
784 | * Calculates hash value from mac address | |
785 | * | |
786 | */ | |
787 | static u32 hash_get(u8 *addr) | |
788 | { | |
789 | u32 hash; | |
790 | u8 tmpval; | |
791 | int cnt; | |
792 | hash = 0; | |
793 | ||
794 | for (cnt = 0; cnt < 2; cnt++) { | |
795 | tmpval = *addr++; | |
796 | hash ^= (tmpval >> 2) ^ (tmpval << 4); | |
797 | tmpval = *addr++; | |
798 | hash ^= (tmpval >> 4) ^ (tmpval << 2); | |
799 | tmpval = *addr++; | |
800 | hash ^= (tmpval >> 6) ^ (tmpval); | |
801 | } | |
802 | ||
803 | return hash & 0x3F; | |
804 | } | |
805 | ||
806 | /** | |
807 | * hash_add: Hash function to add mac addr from hash table | |
808 | * @priv: The DaVinci EMAC private adapter structure | |
809 | * mac_addr: mac address to delete from hash table | |
810 | * | |
811 | * Adds mac address to the internal hash table | |
812 | * | |
813 | */ | |
814 | static int hash_add(struct emac_priv *priv, u8 *mac_addr) | |
815 | { | |
816 | struct device *emac_dev = &priv->ndev->dev; | |
817 | u32 rc = 0; | |
818 | u32 hash_bit; | |
819 | u32 hash_value = hash_get(mac_addr); | |
820 | ||
821 | if (hash_value >= EMAC_NUM_MULTICAST_BITS) { | |
822 | if (netif_msg_drv(priv)) { | |
823 | dev_err(emac_dev, "DaVinci EMAC: hash_add(): Invalid "\ | |
824 | "Hash %08x, should not be greater than %08x", | |
825 | hash_value, (EMAC_NUM_MULTICAST_BITS - 1)); | |
826 | } | |
827 | return -1; | |
828 | } | |
829 | ||
830 | /* set the hash bit only if not previously set */ | |
831 | if (priv->multicast_hash_cnt[hash_value] == 0) { | |
832 | rc = 1; /* hash value changed */ | |
833 | if (hash_value < 32) { | |
834 | hash_bit = BIT(hash_value); | |
835 | priv->mac_hash1 |= hash_bit; | |
836 | } else { | |
837 | hash_bit = BIT((hash_value - 32)); | |
838 | priv->mac_hash2 |= hash_bit; | |
839 | } | |
840 | } | |
841 | ||
842 | /* incr counter for num of mcast addr's mapped to "this" hash bit */ | |
843 | ++priv->multicast_hash_cnt[hash_value]; | |
844 | ||
845 | return rc; | |
846 | } | |
847 | ||
848 | /** | |
849 | * hash_del: Hash function to delete mac addr from hash table | |
850 | * @priv: The DaVinci EMAC private adapter structure | |
851 | * mac_addr: mac address to delete from hash table | |
852 | * | |
853 | * Removes mac address from the internal hash table | |
854 | * | |
855 | */ | |
856 | static int hash_del(struct emac_priv *priv, u8 *mac_addr) | |
857 | { | |
858 | u32 hash_value; | |
859 | u32 hash_bit; | |
860 | ||
861 | hash_value = hash_get(mac_addr); | |
862 | if (priv->multicast_hash_cnt[hash_value] > 0) { | |
863 | /* dec cntr for num of mcast addr's mapped to this hash bit */ | |
864 | --priv->multicast_hash_cnt[hash_value]; | |
865 | } | |
866 | ||
867 | /* if counter still > 0, at least one multicast address refers | |
868 | * to this hash bit. so return 0 */ | |
869 | if (priv->multicast_hash_cnt[hash_value] > 0) | |
870 | return 0; | |
871 | ||
872 | if (hash_value < 32) { | |
873 | hash_bit = BIT(hash_value); | |
874 | priv->mac_hash1 &= ~hash_bit; | |
875 | } else { | |
876 | hash_bit = BIT((hash_value - 32)); | |
877 | priv->mac_hash2 &= ~hash_bit; | |
878 | } | |
879 | ||
880 | /* return 1 to indicate change in mac_hash registers reqd */ | |
881 | return 1; | |
882 | } | |
883 | ||
884 | /* EMAC multicast operation */ | |
885 | #define EMAC_MULTICAST_ADD 0 | |
886 | #define EMAC_MULTICAST_DEL 1 | |
887 | #define EMAC_ALL_MULTI_SET 2 | |
888 | #define EMAC_ALL_MULTI_CLR 3 | |
889 | ||
890 | /** | |
891 | * emac_add_mcast: Set multicast address in the EMAC adapter (Internal) | |
892 | * @priv: The DaVinci EMAC private adapter structure | |
893 | * @action: multicast operation to perform | |
894 | * mac_addr: mac address to set | |
895 | * | |
896 | * Set multicast addresses in EMAC adapter - internal function | |
897 | * | |
898 | */ | |
899 | static void emac_add_mcast(struct emac_priv *priv, u32 action, u8 *mac_addr) | |
900 | { | |
901 | struct device *emac_dev = &priv->ndev->dev; | |
902 | int update = -1; | |
903 | ||
904 | switch (action) { | |
905 | case EMAC_MULTICAST_ADD: | |
906 | update = hash_add(priv, mac_addr); | |
907 | break; | |
908 | case EMAC_MULTICAST_DEL: | |
909 | update = hash_del(priv, mac_addr); | |
910 | break; | |
911 | case EMAC_ALL_MULTI_SET: | |
912 | update = 1; | |
913 | priv->mac_hash1 = EMAC_ALL_MULTI_REG_VALUE; | |
914 | priv->mac_hash2 = EMAC_ALL_MULTI_REG_VALUE; | |
915 | break; | |
916 | case EMAC_ALL_MULTI_CLR: | |
917 | update = 1; | |
918 | priv->mac_hash1 = 0; | |
919 | priv->mac_hash2 = 0; | |
920 | memset(&(priv->multicast_hash_cnt[0]), 0, | |
921 | sizeof(priv->multicast_hash_cnt[0]) * | |
922 | EMAC_NUM_MULTICAST_BITS); | |
923 | break; | |
924 | default: | |
925 | if (netif_msg_drv(priv)) | |
926 | dev_err(emac_dev, "DaVinci EMAC: add_mcast"\ | |
927 | ": bad operation %d", action); | |
928 | break; | |
929 | } | |
930 | ||
931 | /* write to the hardware only if the register status chances */ | |
932 | if (update > 0) { | |
933 | emac_write(EMAC_MACHASH1, priv->mac_hash1); | |
934 | emac_write(EMAC_MACHASH2, priv->mac_hash2); | |
935 | } | |
936 | } | |
937 | ||
938 | /** | |
939 | * emac_dev_mcast_set: Set multicast address in the EMAC adapter | |
940 | * @ndev: The DaVinci EMAC network adapter | |
941 | * | |
942 | * Set multicast addresses in EMAC adapter | |
943 | * | |
944 | */ | |
945 | static void emac_dev_mcast_set(struct net_device *ndev) | |
946 | { | |
947 | u32 mbp_enable; | |
948 | struct emac_priv *priv = netdev_priv(ndev); | |
949 | ||
950 | mbp_enable = emac_read(EMAC_RXMBPENABLE); | |
951 | if (ndev->flags & IFF_PROMISC) { | |
952 | mbp_enable &= (~EMAC_MBP_PROMISCCH(EMAC_DEF_PROM_CH)); | |
953 | mbp_enable |= (EMAC_MBP_RXPROMISC); | |
954 | } else { | |
955 | mbp_enable = (mbp_enable & ~EMAC_MBP_RXPROMISC); | |
956 | if ((ndev->flags & IFF_ALLMULTI) || | |
957 | (ndev->mc_count > EMAC_DEF_MAX_MULTICAST_ADDRESSES)) { | |
958 | mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST); | |
959 | emac_add_mcast(priv, EMAC_ALL_MULTI_SET, NULL); | |
960 | } | |
961 | if (ndev->mc_count > 0) { | |
962 | struct dev_mc_list *mc_ptr; | |
963 | mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST); | |
964 | emac_add_mcast(priv, EMAC_ALL_MULTI_CLR, NULL); | |
965 | /* program multicast address list into EMAC hardware */ | |
966 | for (mc_ptr = ndev->mc_list; mc_ptr; | |
967 | mc_ptr = mc_ptr->next) { | |
968 | emac_add_mcast(priv, EMAC_MULTICAST_ADD, | |
969 | (u8 *)mc_ptr->dmi_addr); | |
970 | } | |
971 | } else { | |
972 | mbp_enable = (mbp_enable & ~EMAC_MBP_RXMCAST); | |
973 | emac_add_mcast(priv, EMAC_ALL_MULTI_CLR, NULL); | |
974 | } | |
975 | } | |
976 | /* Set mbp config register */ | |
977 | emac_write(EMAC_RXMBPENABLE, mbp_enable); | |
978 | } | |
979 | ||
980 | /************************************************************************* | |
981 | * EMAC Hardware manipulation | |
982 | *************************************************************************/ | |
983 | ||
984 | /** | |
985 | * emac_int_disable: Disable EMAC module interrupt (from adapter) | |
986 | * @priv: The DaVinci EMAC private adapter structure | |
987 | * | |
988 | * Disable EMAC interrupt on the adapter | |
989 | * | |
990 | */ | |
991 | static void emac_int_disable(struct emac_priv *priv) | |
992 | { | |
993 | if (priv->version == EMAC_VERSION_2) { | |
994 | unsigned long flags; | |
995 | ||
996 | local_irq_save(flags); | |
997 | ||
998 | /* Program C0_Int_En to zero to turn off | |
999 | * interrupts to the CPU */ | |
1000 | emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0x0); | |
1001 | emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0x0); | |
1002 | /* NOTE: Rx Threshold and Misc interrupts are not disabled */ | |
1003 | ||
1004 | local_irq_restore(flags); | |
1005 | ||
1006 | } else { | |
1007 | /* Set DM644x control registers for interrupt control */ | |
1008 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x0); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * emac_int_enable: Enable EMAC module interrupt (from adapter) | |
1014 | * @priv: The DaVinci EMAC private adapter structure | |
1015 | * | |
1016 | * Enable EMAC interrupt on the adapter | |
1017 | * | |
1018 | */ | |
1019 | static void emac_int_enable(struct emac_priv *priv) | |
1020 | { | |
1021 | if (priv->version == EMAC_VERSION_2) { | |
1022 | emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0xff); | |
1023 | emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0xff); | |
1024 | ||
1025 | /* In addition to turning on interrupt Enable, we need | |
1026 | * ack by writing appropriate values to the EOI | |
1027 | * register */ | |
1028 | ||
1029 | /* NOTE: Rx Threshold and Misc interrupts are not enabled */ | |
1030 | ||
1031 | /* ack rxen only then a new pulse will be generated */ | |
1032 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
1033 | EMAC_DM646X_MAC_EOI_C0_RXEN); | |
1034 | ||
1035 | /* ack txen- only then a new pulse will be generated */ | |
1036 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
1037 | EMAC_DM646X_MAC_EOI_C0_TXEN); | |
1038 | ||
1039 | } else { | |
1040 | /* Set DM644x control registers for interrupt control */ | |
1041 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x1); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * emac_irq: EMAC interrupt handler | |
1047 | * @irq: interrupt number | |
1048 | * @dev_id: EMAC network adapter data structure ptr | |
1049 | * | |
1050 | * EMAC Interrupt handler - we only schedule NAPI and not process any packets | |
1051 | * here. EVen the interrupt status is checked (TX/RX/Err) in NAPI poll function | |
1052 | * | |
1053 | * Returns interrupt handled condition | |
1054 | */ | |
1055 | static irqreturn_t emac_irq(int irq, void *dev_id) | |
1056 | { | |
1057 | struct net_device *ndev = (struct net_device *)dev_id; | |
1058 | struct emac_priv *priv = netdev_priv(ndev); | |
1059 | ||
1060 | ++priv->isr_count; | |
1061 | if (likely(netif_running(priv->ndev))) { | |
1062 | emac_int_disable(priv); | |
1063 | napi_schedule(&priv->napi); | |
1064 | } else { | |
1065 | /* we are closing down, so dont process anything */ | |
1066 | } | |
1067 | return IRQ_HANDLED; | |
1068 | } | |
1069 | ||
1070 | /** EMAC on-chip buffer descriptor memory | |
1071 | * | |
1072 | * WARNING: Please note that the on chip memory is used for both TX and RX | |
1073 | * buffer descriptor queues and is equally divided between TX and RX desc's | |
1074 | * If the number of TX or RX descriptors change this memory pointers need | |
1075 | * to be adjusted. If external memory is allocated then these pointers can | |
1076 | * pointer to the memory | |
1077 | * | |
1078 | */ | |
1079 | #define EMAC_TX_BD_MEM(priv) ((priv)->emac_ctrl_ram) | |
1080 | #define EMAC_RX_BD_MEM(priv) ((priv)->emac_ctrl_ram + \ | |
1081 | (((priv)->ctrl_ram_size) >> 1)) | |
1082 | ||
1083 | /** | |
1084 | * emac_init_txch: TX channel initialization | |
1085 | * @priv: The DaVinci EMAC private adapter structure | |
1086 | * @ch: RX channel number | |
1087 | * | |
1088 | * Called during device init to setup a TX channel (allocate buffer desc | |
1089 | * create free pool and keep ready for transmission | |
1090 | * | |
1091 | * Returns success(0) or mem alloc failures error code | |
1092 | */ | |
1093 | static int emac_init_txch(struct emac_priv *priv, u32 ch) | |
1094 | { | |
1095 | struct device *emac_dev = &priv->ndev->dev; | |
1096 | u32 cnt, bd_size; | |
1097 | void __iomem *mem; | |
1098 | struct emac_tx_bd __iomem *curr_bd; | |
1099 | struct emac_txch *txch = NULL; | |
1100 | ||
1101 | txch = kzalloc(sizeof(struct emac_txch), GFP_KERNEL); | |
1102 | if (NULL == txch) { | |
1103 | dev_err(emac_dev, "DaVinci EMAC: TX Ch mem alloc failed"); | |
1104 | return -ENOMEM; | |
1105 | } | |
1106 | priv->txch[ch] = txch; | |
1107 | txch->service_max = EMAC_DEF_TX_MAX_SERVICE; | |
1108 | txch->active_queue_head = NULL; | |
1109 | txch->active_queue_tail = NULL; | |
1110 | txch->queue_active = 0; | |
1111 | txch->teardown_pending = 0; | |
1112 | ||
1113 | /* allocate memory for TX CPPI channel on a 4 byte boundry */ | |
1114 | txch->tx_complete = kzalloc(txch->service_max * sizeof(u32), | |
1115 | GFP_KERNEL); | |
1116 | if (NULL == txch->tx_complete) { | |
1117 | dev_err(emac_dev, "DaVinci EMAC: Tx service mem alloc failed"); | |
1118 | kfree(txch); | |
1119 | return -ENOMEM; | |
1120 | } | |
1121 | ||
1122 | /* allocate buffer descriptor pool align every BD on four word | |
1123 | * boundry for future requirements */ | |
1124 | bd_size = (sizeof(struct emac_tx_bd) + 0xF) & ~0xF; | |
1125 | txch->num_bd = (priv->ctrl_ram_size >> 1) / bd_size; | |
1126 | txch->alloc_size = (((bd_size * txch->num_bd) + 0xF) & ~0xF); | |
1127 | ||
1128 | /* alloc TX BD memory */ | |
1129 | txch->bd_mem = EMAC_TX_BD_MEM(priv); | |
1130 | __memzero((void __force *)txch->bd_mem, txch->alloc_size); | |
1131 | ||
1132 | /* initialize the BD linked list */ | |
1133 | mem = (void __force __iomem *) | |
1134 | (((u32 __force) txch->bd_mem + 0xF) & ~0xF); | |
1135 | txch->bd_pool_head = NULL; | |
1136 | for (cnt = 0; cnt < txch->num_bd; cnt++) { | |
1137 | curr_bd = mem + (cnt * bd_size); | |
1138 | curr_bd->next = txch->bd_pool_head; | |
1139 | txch->bd_pool_head = curr_bd; | |
1140 | } | |
1141 | ||
1142 | /* reset statistics counters */ | |
1143 | txch->out_of_tx_bd = 0; | |
1144 | txch->no_active_pkts = 0; | |
1145 | txch->active_queue_count = 0; | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | /** | |
1151 | * emac_cleanup_txch: Book-keep function to clean TX channel resources | |
1152 | * @priv: The DaVinci EMAC private adapter structure | |
1153 | * @ch: TX channel number | |
1154 | * | |
1155 | * Called to clean up TX channel resources | |
1156 | * | |
1157 | */ | |
1158 | static void emac_cleanup_txch(struct emac_priv *priv, u32 ch) | |
1159 | { | |
1160 | struct emac_txch *txch = priv->txch[ch]; | |
1161 | ||
1162 | if (txch) { | |
1163 | if (txch->bd_mem) | |
1164 | txch->bd_mem = NULL; | |
1165 | kfree(txch->tx_complete); | |
1166 | kfree(txch); | |
1167 | priv->txch[ch] = NULL; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * emac_net_tx_complete: TX packet completion function | |
1173 | * @priv: The DaVinci EMAC private adapter structure | |
1174 | * @net_data_tokens: packet token - skb pointer | |
1175 | * @num_tokens: number of skb's to free | |
1176 | * @ch: TX channel number | |
1177 | * | |
1178 | * Frees the skb once packet is transmitted | |
1179 | * | |
1180 | */ | |
1181 | static int emac_net_tx_complete(struct emac_priv *priv, | |
1182 | void **net_data_tokens, | |
1183 | int num_tokens, u32 ch) | |
1184 | { | |
1185 | u32 cnt; | |
1186 | ||
1187 | if (unlikely(num_tokens && netif_queue_stopped(priv->ndev))) | |
1188 | netif_start_queue(priv->ndev); | |
1189 | for (cnt = 0; cnt < num_tokens; cnt++) { | |
1190 | struct sk_buff *skb = (struct sk_buff *)net_data_tokens[cnt]; | |
1191 | if (skb == NULL) | |
1192 | continue; | |
1193 | priv->net_dev_stats.tx_packets++; | |
1194 | priv->net_dev_stats.tx_bytes += skb->len; | |
1195 | dev_kfree_skb_any(skb); | |
1196 | } | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | /** | |
1201 | * emac_txch_teardown: TX channel teardown | |
1202 | * @priv: The DaVinci EMAC private adapter structure | |
1203 | * @ch: TX channel number | |
1204 | * | |
1205 | * Called to teardown TX channel | |
1206 | * | |
1207 | */ | |
1208 | static void emac_txch_teardown(struct emac_priv *priv, u32 ch) | |
1209 | { | |
1210 | struct device *emac_dev = &priv->ndev->dev; | |
1211 | u32 teardown_cnt = 0xFFFFFFF0; /* Some high value */ | |
1212 | struct emac_txch *txch = priv->txch[ch]; | |
1213 | struct emac_tx_bd __iomem *curr_bd; | |
1214 | ||
1215 | while ((emac_read(EMAC_TXCP(ch)) & EMAC_TEARDOWN_VALUE) != | |
1216 | EMAC_TEARDOWN_VALUE) { | |
1217 | /* wait till tx teardown complete */ | |
1218 | cpu_relax(); /* TODO: check if this helps ... */ | |
1219 | --teardown_cnt; | |
1220 | if (0 == teardown_cnt) { | |
1221 | dev_err(emac_dev, "EMAC: TX teardown aborted\n"); | |
1222 | break; | |
1223 | } | |
1224 | } | |
1225 | emac_write(EMAC_TXCP(ch), EMAC_TEARDOWN_VALUE); | |
1226 | ||
1227 | /* process sent packets and return skb's to upper layer */ | |
1228 | if (1 == txch->queue_active) { | |
1229 | curr_bd = txch->active_queue_head; | |
1230 | while (curr_bd != NULL) { | |
1231 | emac_net_tx_complete(priv, (void __force *) | |
1232 | &curr_bd->buf_token, 1, ch); | |
1233 | if (curr_bd != txch->active_queue_tail) | |
1234 | curr_bd = curr_bd->next; | |
1235 | else | |
1236 | break; | |
1237 | } | |
1238 | txch->bd_pool_head = txch->active_queue_head; | |
1239 | txch->active_queue_head = | |
1240 | txch->active_queue_tail = NULL; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * emac_stop_txch: Stop TX channel operation | |
1246 | * @priv: The DaVinci EMAC private adapter structure | |
1247 | * @ch: TX channel number | |
1248 | * | |
1249 | * Called to stop TX channel operation | |
1250 | * | |
1251 | */ | |
1252 | static void emac_stop_txch(struct emac_priv *priv, u32 ch) | |
1253 | { | |
1254 | struct emac_txch *txch = priv->txch[ch]; | |
1255 | ||
1256 | if (txch) { | |
1257 | txch->teardown_pending = 1; | |
1258 | emac_write(EMAC_TXTEARDOWN, 0); | |
1259 | emac_txch_teardown(priv, ch); | |
1260 | txch->teardown_pending = 0; | |
1261 | emac_write(EMAC_TXINTMASKCLEAR, BIT(ch)); | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | /** | |
1266 | * emac_tx_bdproc: TX buffer descriptor (packet) processing | |
1267 | * @priv: The DaVinci EMAC private adapter structure | |
1268 | * @ch: TX channel number to process buffer descriptors for | |
1269 | * @budget: number of packets allowed to process | |
1270 | * @pending: indication to caller that packets are pending to process | |
1271 | * | |
1272 | * Processes TX buffer descriptors after packets are transmitted - checks | |
1273 | * ownership bit on the TX * descriptor and requeues it to free pool & frees | |
1274 | * the SKB buffer. Only "budget" number of packets are processed and | |
1275 | * indication of pending packets provided to the caller | |
1276 | * | |
1277 | * Returns number of packets processed | |
1278 | */ | |
1279 | static int emac_tx_bdproc(struct emac_priv *priv, u32 ch, u32 budget) | |
1280 | { | |
1281 | struct device *emac_dev = &priv->ndev->dev; | |
1282 | unsigned long flags; | |
1283 | u32 frame_status; | |
1284 | u32 pkts_processed = 0; | |
1285 | u32 tx_complete_cnt = 0; | |
1286 | struct emac_tx_bd __iomem *curr_bd; | |
1287 | struct emac_txch *txch = priv->txch[ch]; | |
1288 | u32 *tx_complete_ptr = txch->tx_complete; | |
1289 | ||
1290 | if (unlikely(1 == txch->teardown_pending)) { | |
1291 | if (netif_msg_tx_err(priv) && net_ratelimit()) { | |
1292 | dev_err(emac_dev, "DaVinci EMAC:emac_tx_bdproc: "\ | |
1293 | "teardown pending\n"); | |
1294 | } | |
1295 | return 0; /* dont handle any pkt completions */ | |
1296 | } | |
1297 | ||
1298 | ++txch->proc_count; | |
1299 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1300 | curr_bd = txch->active_queue_head; | |
1301 | if (NULL == curr_bd) { | |
1302 | emac_write(EMAC_TXCP(ch), | |
1303 | emac_virt_to_phys(txch->last_hw_bdprocessed)); | |
1304 | txch->no_active_pkts++; | |
1305 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1306 | return 0; | |
1307 | } | |
1308 | BD_CACHE_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
1309 | frame_status = curr_bd->mode; | |
1310 | while ((curr_bd) && | |
1311 | ((frame_status & EMAC_CPPI_OWNERSHIP_BIT) == 0) && | |
1312 | (pkts_processed < budget)) { | |
1313 | emac_write(EMAC_TXCP(ch), emac_virt_to_phys(curr_bd)); | |
1314 | txch->active_queue_head = curr_bd->next; | |
1315 | if (frame_status & EMAC_CPPI_EOQ_BIT) { | |
1316 | if (curr_bd->next) { /* misqueued packet */ | |
1317 | emac_write(EMAC_TXHDP(ch), curr_bd->h_next); | |
1318 | ++txch->mis_queued_packets; | |
1319 | } else { | |
1320 | txch->queue_active = 0; /* end of queue */ | |
1321 | } | |
1322 | } | |
1323 | *tx_complete_ptr = (u32) curr_bd->buf_token; | |
1324 | ++tx_complete_ptr; | |
1325 | ++tx_complete_cnt; | |
1326 | curr_bd->next = txch->bd_pool_head; | |
1327 | txch->bd_pool_head = curr_bd; | |
1328 | --txch->active_queue_count; | |
1329 | pkts_processed++; | |
1330 | txch->last_hw_bdprocessed = curr_bd; | |
1331 | curr_bd = txch->active_queue_head; | |
1332 | if (curr_bd) { | |
1333 | BD_CACHE_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
1334 | frame_status = curr_bd->mode; | |
1335 | } | |
1336 | } /* end of pkt processing loop */ | |
1337 | ||
1338 | emac_net_tx_complete(priv, | |
1339 | (void *)&txch->tx_complete[0], | |
1340 | tx_complete_cnt, ch); | |
1341 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1342 | return pkts_processed; | |
1343 | } | |
1344 | ||
1345 | #define EMAC_ERR_TX_OUT_OF_BD -1 | |
1346 | ||
1347 | /** | |
1348 | * emac_send: EMAC Transmit function (internal) | |
1349 | * @priv: The DaVinci EMAC private adapter structure | |
1350 | * @pkt: packet pointer (contains skb ptr) | |
1351 | * @ch: TX channel number | |
1352 | * | |
1353 | * Called by the transmit function to queue the packet in EMAC hardware queue | |
1354 | * | |
1355 | * Returns success(0) or error code (typically out of desc's) | |
1356 | */ | |
1357 | static int emac_send(struct emac_priv *priv, struct emac_netpktobj *pkt, u32 ch) | |
1358 | { | |
1359 | unsigned long flags; | |
1360 | struct emac_tx_bd __iomem *curr_bd; | |
1361 | struct emac_txch *txch; | |
1362 | struct emac_netbufobj *buf_list; | |
1363 | ||
1364 | txch = priv->txch[ch]; | |
1365 | buf_list = pkt->buf_list; /* get handle to the buffer array */ | |
1366 | ||
1367 | /* check packet size and pad if short */ | |
1368 | if (pkt->pkt_length < EMAC_DEF_MIN_ETHPKTSIZE) { | |
1369 | buf_list->length += (EMAC_DEF_MIN_ETHPKTSIZE - pkt->pkt_length); | |
1370 | pkt->pkt_length = EMAC_DEF_MIN_ETHPKTSIZE; | |
1371 | } | |
1372 | ||
1373 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1374 | curr_bd = txch->bd_pool_head; | |
1375 | if (curr_bd == NULL) { | |
1376 | txch->out_of_tx_bd++; | |
1377 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1378 | return EMAC_ERR_TX_OUT_OF_BD; | |
1379 | } | |
1380 | ||
1381 | txch->bd_pool_head = curr_bd->next; | |
1382 | curr_bd->buf_token = buf_list->buf_token; | |
1383 | /* FIXME buff_ptr = dma_map_single(... data_ptr ...) */ | |
1384 | curr_bd->buff_ptr = virt_to_phys(buf_list->data_ptr); | |
1385 | curr_bd->off_b_len = buf_list->length; | |
1386 | curr_bd->h_next = 0; | |
1387 | curr_bd->next = NULL; | |
1388 | curr_bd->mode = (EMAC_CPPI_SOP_BIT | EMAC_CPPI_OWNERSHIP_BIT | | |
1389 | EMAC_CPPI_EOP_BIT | pkt->pkt_length); | |
1390 | ||
1391 | /* flush the packet from cache if write back cache is present */ | |
1392 | BD_CACHE_WRITEBACK_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
1393 | ||
1394 | /* send the packet */ | |
1395 | if (txch->active_queue_head == NULL) { | |
1396 | txch->active_queue_head = curr_bd; | |
1397 | txch->active_queue_tail = curr_bd; | |
1398 | if (1 != txch->queue_active) { | |
1399 | emac_write(EMAC_TXHDP(ch), | |
1400 | emac_virt_to_phys(curr_bd)); | |
1401 | txch->queue_active = 1; | |
1402 | } | |
1403 | ++txch->queue_reinit; | |
1404 | } else { | |
1405 | register struct emac_tx_bd __iomem *tail_bd; | |
1406 | register u32 frame_status; | |
1407 | ||
1408 | tail_bd = txch->active_queue_tail; | |
1409 | tail_bd->next = curr_bd; | |
1410 | txch->active_queue_tail = curr_bd; | |
1411 | tail_bd = EMAC_VIRT_NOCACHE(tail_bd); | |
1412 | tail_bd->h_next = (int)emac_virt_to_phys(curr_bd); | |
1413 | frame_status = tail_bd->mode; | |
1414 | if (frame_status & EMAC_CPPI_EOQ_BIT) { | |
1415 | emac_write(EMAC_TXHDP(ch), emac_virt_to_phys(curr_bd)); | |
1416 | frame_status &= ~(EMAC_CPPI_EOQ_BIT); | |
1417 | tail_bd->mode = frame_status; | |
1418 | ++txch->end_of_queue_add; | |
1419 | } | |
1420 | } | |
1421 | txch->active_queue_count++; | |
1422 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | /** | |
1427 | * emac_dev_xmit: EMAC Transmit function | |
1428 | * @skb: SKB pointer | |
1429 | * @ndev: The DaVinci EMAC network adapter | |
1430 | * | |
1431 | * Called by the system to transmit a packet - we queue the packet in | |
1432 | * EMAC hardware transmit queue | |
1433 | * | |
1434 | * Returns success(NETDEV_TX_OK) or error code (typically out of desc's) | |
1435 | */ | |
1436 | static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1437 | { | |
1438 | struct device *emac_dev = &ndev->dev; | |
1439 | int ret_code; | |
1440 | struct emac_netbufobj tx_buf; /* buffer obj-only single frame support */ | |
1441 | struct emac_netpktobj tx_packet; /* packet object */ | |
1442 | struct emac_priv *priv = netdev_priv(ndev); | |
1443 | ||
1444 | /* If no link, return */ | |
1445 | if (unlikely(!priv->link)) { | |
1446 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1447 | dev_err(emac_dev, "DaVinci EMAC: No link to transmit"); | |
1448 | return NETDEV_TX_BUSY; | |
1449 | } | |
1450 | ||
1451 | /* Build the buffer and packet objects - Since only single fragment is | |
1452 | * supported, need not set length and token in both packet & object. | |
1453 | * Doing so for completeness sake & to show that this needs to be done | |
1454 | * in multifragment case | |
1455 | */ | |
1456 | tx_packet.buf_list = &tx_buf; | |
1457 | tx_packet.num_bufs = 1; /* only single fragment supported */ | |
1458 | tx_packet.pkt_length = skb->len; | |
1459 | tx_packet.pkt_token = (void *)skb; | |
1460 | tx_buf.length = skb->len; | |
1461 | tx_buf.buf_token = (void *)skb; | |
1462 | tx_buf.data_ptr = skb->data; | |
1463 | EMAC_CACHE_WRITEBACK((unsigned long)skb->data, skb->len); | |
1464 | ndev->trans_start = jiffies; | |
1465 | ret_code = emac_send(priv, &tx_packet, EMAC_DEF_TX_CH); | |
1466 | if (unlikely(ret_code != 0)) { | |
1467 | if (ret_code == EMAC_ERR_TX_OUT_OF_BD) { | |
1468 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1469 | dev_err(emac_dev, "DaVinci EMAC: xmit() fatal"\ | |
1470 | " err. Out of TX BD's"); | |
1471 | netif_stop_queue(priv->ndev); | |
1472 | } | |
1473 | priv->net_dev_stats.tx_dropped++; | |
1474 | return NETDEV_TX_BUSY; | |
1475 | } | |
1476 | ||
1477 | return NETDEV_TX_OK; | |
1478 | } | |
1479 | ||
1480 | /** | |
1481 | * emac_dev_tx_timeout: EMAC Transmit timeout function | |
1482 | * @ndev: The DaVinci EMAC network adapter | |
1483 | * | |
1484 | * Called when system detects that a skb timeout period has expired | |
1485 | * potentially due to a fault in the adapter in not being able to send | |
1486 | * it out on the wire. We teardown the TX channel assuming a hardware | |
1487 | * error and re-initialize the TX channel for hardware operation | |
1488 | * | |
1489 | */ | |
1490 | static void emac_dev_tx_timeout(struct net_device *ndev) | |
1491 | { | |
1492 | struct emac_priv *priv = netdev_priv(ndev); | |
1493 | struct device *emac_dev = &ndev->dev; | |
1494 | ||
1495 | if (netif_msg_tx_err(priv)) | |
1496 | dev_err(emac_dev, "DaVinci EMAC: xmit timeout, restarting TX"); | |
1497 | ||
1498 | priv->net_dev_stats.tx_errors++; | |
1499 | emac_int_disable(priv); | |
1500 | emac_stop_txch(priv, EMAC_DEF_TX_CH); | |
1501 | emac_cleanup_txch(priv, EMAC_DEF_TX_CH); | |
1502 | emac_init_txch(priv, EMAC_DEF_TX_CH); | |
1503 | emac_write(EMAC_TXHDP(0), 0); | |
1504 | emac_write(EMAC_TXINTMASKSET, BIT(EMAC_DEF_TX_CH)); | |
1505 | emac_int_enable(priv); | |
1506 | } | |
1507 | ||
1508 | /** | |
1509 | * emac_net_alloc_rx_buf: Allocate a skb for RX | |
1510 | * @priv: The DaVinci EMAC private adapter structure | |
1511 | * @buf_size: size of SKB data buffer to allocate | |
1512 | * @data_token: data token returned (skb handle for storing in buffer desc) | |
1513 | * @ch: RX channel number | |
1514 | * | |
1515 | * Called during RX channel setup - allocates skb buffer of required size | |
1516 | * and provides the skb handle and allocated buffer data pointer to caller | |
1517 | * | |
1518 | * Returns skb data pointer or 0 on failure to alloc skb | |
1519 | */ | |
1520 | static void *emac_net_alloc_rx_buf(struct emac_priv *priv, int buf_size, | |
1521 | void **data_token, u32 ch) | |
1522 | { | |
1523 | struct net_device *ndev = priv->ndev; | |
1524 | struct device *emac_dev = &ndev->dev; | |
1525 | struct sk_buff *p_skb; | |
1526 | ||
1527 | p_skb = dev_alloc_skb(buf_size); | |
1528 | if (unlikely(NULL == p_skb)) { | |
1529 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
1530 | dev_err(emac_dev, "DaVinci EMAC: failed to alloc skb"); | |
1531 | return NULL; | |
1532 | } | |
1533 | ||
1534 | /* set device pointer in skb and reserve space for extra bytes */ | |
1535 | p_skb->dev = ndev; | |
1536 | skb_reserve(p_skb, NET_IP_ALIGN); | |
1537 | *data_token = (void *) p_skb; | |
1538 | EMAC_CACHE_WRITEBACK_INVALIDATE((unsigned long)p_skb->data, buf_size); | |
1539 | return p_skb->data; | |
1540 | } | |
1541 | ||
1542 | /** | |
1543 | * emac_init_rxch: RX channel initialization | |
1544 | * @priv: The DaVinci EMAC private adapter structure | |
1545 | * @ch: RX channel number | |
1546 | * @param: mac address for RX channel | |
1547 | * | |
1548 | * Called during device init to setup a RX channel (allocate buffers and | |
1549 | * buffer descriptors, create queue and keep ready for reception | |
1550 | * | |
1551 | * Returns success(0) or mem alloc failures error code | |
1552 | */ | |
1553 | static int emac_init_rxch(struct emac_priv *priv, u32 ch, char *param) | |
1554 | { | |
1555 | struct device *emac_dev = &priv->ndev->dev; | |
1556 | u32 cnt, bd_size; | |
1557 | void __iomem *mem; | |
1558 | struct emac_rx_bd __iomem *curr_bd; | |
1559 | struct emac_rxch *rxch = NULL; | |
1560 | ||
1561 | rxch = kzalloc(sizeof(struct emac_rxch), GFP_KERNEL); | |
1562 | if (NULL == rxch) { | |
1563 | dev_err(emac_dev, "DaVinci EMAC: RX Ch mem alloc failed"); | |
1564 | return -ENOMEM; | |
1565 | } | |
1566 | priv->rxch[ch] = rxch; | |
1567 | rxch->buf_size = priv->rx_buf_size; | |
1568 | rxch->service_max = EMAC_DEF_RX_MAX_SERVICE; | |
1569 | rxch->queue_active = 0; | |
1570 | rxch->teardown_pending = 0; | |
1571 | ||
1572 | /* save mac address */ | |
1573 | for (cnt = 0; cnt < 6; cnt++) | |
1574 | rxch->mac_addr[cnt] = param[cnt]; | |
1575 | ||
1576 | /* allocate buffer descriptor pool align every BD on four word | |
1577 | * boundry for future requirements */ | |
1578 | bd_size = (sizeof(struct emac_rx_bd) + 0xF) & ~0xF; | |
1579 | rxch->num_bd = (priv->ctrl_ram_size >> 1) / bd_size; | |
1580 | rxch->alloc_size = (((bd_size * rxch->num_bd) + 0xF) & ~0xF); | |
1581 | rxch->bd_mem = EMAC_RX_BD_MEM(priv); | |
1582 | __memzero((void __force *)rxch->bd_mem, rxch->alloc_size); | |
1583 | rxch->pkt_queue.buf_list = &rxch->buf_queue; | |
1584 | ||
1585 | /* allocate RX buffer and initialize the BD linked list */ | |
1586 | mem = (void __force __iomem *) | |
1587 | (((u32 __force) rxch->bd_mem + 0xF) & ~0xF); | |
1588 | rxch->active_queue_head = NULL; | |
1589 | rxch->active_queue_tail = mem; | |
1590 | for (cnt = 0; cnt < rxch->num_bd; cnt++) { | |
1591 | curr_bd = mem + (cnt * bd_size); | |
1592 | /* for future use the last parameter contains the BD ptr */ | |
1593 | curr_bd->data_ptr = emac_net_alloc_rx_buf(priv, | |
1594 | rxch->buf_size, | |
1595 | (void __force **)&curr_bd->buf_token, | |
1596 | EMAC_DEF_RX_CH); | |
1597 | if (curr_bd->data_ptr == NULL) { | |
1598 | dev_err(emac_dev, "DaVinci EMAC: RX buf mem alloc " \ | |
1599 | "failed for ch %d\n", ch); | |
1600 | kfree(rxch); | |
1601 | return -ENOMEM; | |
1602 | } | |
1603 | ||
1604 | /* populate the hardware descriptor */ | |
1605 | curr_bd->h_next = emac_virt_to_phys(rxch->active_queue_head); | |
1606 | /* FIXME buff_ptr = dma_map_single(... data_ptr ...) */ | |
1607 | curr_bd->buff_ptr = virt_to_phys(curr_bd->data_ptr); | |
1608 | curr_bd->off_b_len = rxch->buf_size; | |
1609 | curr_bd->mode = EMAC_CPPI_OWNERSHIP_BIT; | |
1610 | ||
1611 | /* write back to hardware memory */ | |
1612 | BD_CACHE_WRITEBACK_INVALIDATE((u32) curr_bd, | |
1613 | EMAC_BD_LENGTH_FOR_CACHE); | |
1614 | curr_bd->next = rxch->active_queue_head; | |
1615 | rxch->active_queue_head = curr_bd; | |
1616 | } | |
1617 | ||
1618 | /* At this point rxCppi->activeQueueHead points to the first | |
1619 | RX BD ready to be given to RX HDP and rxch->active_queue_tail | |
1620 | points to the last RX BD | |
1621 | */ | |
1622 | return 0; | |
1623 | } | |
1624 | ||
1625 | /** | |
1626 | * emac_rxch_teardown: RX channel teardown | |
1627 | * @priv: The DaVinci EMAC private adapter structure | |
1628 | * @ch: RX channel number | |
1629 | * | |
1630 | * Called during device stop to teardown RX channel | |
1631 | * | |
1632 | */ | |
1633 | static void emac_rxch_teardown(struct emac_priv *priv, u32 ch) | |
1634 | { | |
1635 | struct device *emac_dev = &priv->ndev->dev; | |
1636 | u32 teardown_cnt = 0xFFFFFFF0; /* Some high value */ | |
1637 | ||
1638 | while ((emac_read(EMAC_RXCP(ch)) & EMAC_TEARDOWN_VALUE) != | |
1639 | EMAC_TEARDOWN_VALUE) { | |
1640 | /* wait till tx teardown complete */ | |
1641 | cpu_relax(); /* TODO: check if this helps ... */ | |
1642 | --teardown_cnt; | |
1643 | if (0 == teardown_cnt) { | |
1644 | dev_err(emac_dev, "EMAC: RX teardown aborted\n"); | |
1645 | break; | |
1646 | } | |
1647 | } | |
1648 | emac_write(EMAC_RXCP(ch), EMAC_TEARDOWN_VALUE); | |
1649 | } | |
1650 | ||
1651 | /** | |
1652 | * emac_stop_rxch: Stop RX channel operation | |
1653 | * @priv: The DaVinci EMAC private adapter structure | |
1654 | * @ch: RX channel number | |
1655 | * | |
1656 | * Called during device stop to stop RX channel operation | |
1657 | * | |
1658 | */ | |
1659 | static void emac_stop_rxch(struct emac_priv *priv, u32 ch) | |
1660 | { | |
1661 | struct emac_rxch *rxch = priv->rxch[ch]; | |
1662 | ||
1663 | if (rxch) { | |
1664 | rxch->teardown_pending = 1; | |
1665 | emac_write(EMAC_RXTEARDOWN, ch); | |
1666 | /* wait for teardown complete */ | |
1667 | emac_rxch_teardown(priv, ch); | |
1668 | rxch->teardown_pending = 0; | |
1669 | emac_write(EMAC_RXINTMASKCLEAR, BIT(ch)); | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | /** | |
1674 | * emac_cleanup_rxch: Book-keep function to clean RX channel resources | |
1675 | * @priv: The DaVinci EMAC private adapter structure | |
1676 | * @ch: RX channel number | |
1677 | * | |
1678 | * Called during device stop to clean up RX channel resources | |
1679 | * | |
1680 | */ | |
1681 | static void emac_cleanup_rxch(struct emac_priv *priv, u32 ch) | |
1682 | { | |
1683 | struct emac_rxch *rxch = priv->rxch[ch]; | |
1684 | struct emac_rx_bd __iomem *curr_bd; | |
1685 | ||
1686 | if (rxch) { | |
1687 | /* free the receive buffers previously allocated */ | |
1688 | curr_bd = rxch->active_queue_head; | |
1689 | while (curr_bd) { | |
1690 | if (curr_bd->buf_token) { | |
1691 | dev_kfree_skb_any((struct sk_buff *)\ | |
1692 | curr_bd->buf_token); | |
1693 | } | |
1694 | curr_bd = curr_bd->next; | |
1695 | } | |
1696 | if (rxch->bd_mem) | |
1697 | rxch->bd_mem = NULL; | |
1698 | kfree(rxch); | |
1699 | priv->rxch[ch] = NULL; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /** | |
1704 | * emac_set_type0addr: Set EMAC Type0 mac address | |
1705 | * @priv: The DaVinci EMAC private adapter structure | |
1706 | * @ch: RX channel number | |
1707 | * @mac_addr: MAC address to set in device | |
1708 | * | |
1709 | * Called internally to set Type0 mac address of the adapter (Device) | |
1710 | * | |
1711 | * Returns success (0) or appropriate error code (none as of now) | |
1712 | */ | |
1713 | static void emac_set_type0addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1714 | { | |
1715 | u32 val; | |
1716 | val = ((mac_addr[5] << 8) | (mac_addr[4])); | |
1717 | emac_write(EMAC_MACSRCADDRLO, val); | |
1718 | ||
1719 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1720 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1721 | emac_write(EMAC_MACSRCADDRHI, val); | |
1722 | val = emac_read(EMAC_RXUNICASTSET); | |
1723 | val |= BIT(ch); | |
1724 | emac_write(EMAC_RXUNICASTSET, val); | |
1725 | val = emac_read(EMAC_RXUNICASTCLEAR); | |
1726 | val &= ~BIT(ch); | |
1727 | emac_write(EMAC_RXUNICASTCLEAR, val); | |
1728 | } | |
1729 | ||
1730 | /** | |
1731 | * emac_set_type1addr: Set EMAC Type1 mac address | |
1732 | * @priv: The DaVinci EMAC private adapter structure | |
1733 | * @ch: RX channel number | |
1734 | * @mac_addr: MAC address to set in device | |
1735 | * | |
1736 | * Called internally to set Type1 mac address of the adapter (Device) | |
1737 | * | |
1738 | * Returns success (0) or appropriate error code (none as of now) | |
1739 | */ | |
1740 | static void emac_set_type1addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1741 | { | |
1742 | u32 val; | |
1743 | emac_write(EMAC_MACINDEX, ch); | |
1744 | val = ((mac_addr[5] << 8) | mac_addr[4]); | |
1745 | emac_write(EMAC_MACADDRLO, val); | |
1746 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1747 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1748 | emac_write(EMAC_MACADDRHI, val); | |
1749 | emac_set_type0addr(priv, ch, mac_addr); | |
1750 | } | |
1751 | ||
1752 | /** | |
1753 | * emac_set_type2addr: Set EMAC Type2 mac address | |
1754 | * @priv: The DaVinci EMAC private adapter structure | |
1755 | * @ch: RX channel number | |
1756 | * @mac_addr: MAC address to set in device | |
1757 | * @index: index into RX address entries | |
1758 | * @match: match parameter for RX address matching logic | |
1759 | * | |
1760 | * Called internally to set Type2 mac address of the adapter (Device) | |
1761 | * | |
1762 | * Returns success (0) or appropriate error code (none as of now) | |
1763 | */ | |
1764 | static void emac_set_type2addr(struct emac_priv *priv, u32 ch, | |
1765 | char *mac_addr, int index, int match) | |
1766 | { | |
1767 | u32 val; | |
1768 | emac_write(EMAC_MACINDEX, index); | |
1769 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1770 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1771 | emac_write(EMAC_MACADDRHI, val); | |
1772 | val = ((mac_addr[5] << 8) | mac_addr[4] | ((ch & 0x7) << 16) | \ | |
1773 | (match << 19) | BIT(20)); | |
1774 | emac_write(EMAC_MACADDRLO, val); | |
1775 | emac_set_type0addr(priv, ch, mac_addr); | |
1776 | } | |
1777 | ||
1778 | /** | |
1779 | * emac_setmac: Set mac address in the adapter (internal function) | |
1780 | * @priv: The DaVinci EMAC private adapter structure | |
1781 | * @ch: RX channel number | |
1782 | * @mac_addr: MAC address to set in device | |
1783 | * | |
1784 | * Called internally to set the mac address of the adapter (Device) | |
1785 | * | |
1786 | * Returns success (0) or appropriate error code (none as of now) | |
1787 | */ | |
1788 | static void emac_setmac(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1789 | { | |
1790 | struct device *emac_dev = &priv->ndev->dev; | |
1791 | ||
1792 | if (priv->rx_addr_type == 0) { | |
1793 | emac_set_type0addr(priv, ch, mac_addr); | |
1794 | } else if (priv->rx_addr_type == 1) { | |
1795 | u32 cnt; | |
1796 | for (cnt = 0; cnt < EMAC_MAX_TXRX_CHANNELS; cnt++) | |
1797 | emac_set_type1addr(priv, ch, mac_addr); | |
1798 | } else if (priv->rx_addr_type == 2) { | |
1799 | emac_set_type2addr(priv, ch, mac_addr, ch, 1); | |
1800 | emac_set_type0addr(priv, ch, mac_addr); | |
1801 | } else { | |
1802 | if (netif_msg_drv(priv)) | |
1803 | dev_err(emac_dev, "DaVinci EMAC: Wrong addressing\n"); | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | /** | |
1808 | * emac_dev_setmac_addr: Set mac address in the adapter | |
1809 | * @ndev: The DaVinci EMAC network adapter | |
1810 | * @addr: MAC address to set in device | |
1811 | * | |
1812 | * Called by the system to set the mac address of the adapter (Device) | |
1813 | * | |
1814 | * Returns success (0) or appropriate error code (none as of now) | |
1815 | */ | |
1816 | static int emac_dev_setmac_addr(struct net_device *ndev, void *addr) | |
1817 | { | |
1818 | struct emac_priv *priv = netdev_priv(ndev); | |
1819 | struct emac_rxch *rxch = priv->rxch[EMAC_DEF_RX_CH]; | |
1820 | struct device *emac_dev = &priv->ndev->dev; | |
1821 | struct sockaddr *sa = addr; | |
a6286ee6 AG |
1822 | |
1823 | /* Store mac addr in priv and rx channel and set it in EMAC hw */ | |
1824 | memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len); | |
1825 | memcpy(rxch->mac_addr, sa->sa_data, ndev->addr_len); | |
1826 | memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len); | |
1827 | emac_setmac(priv, EMAC_DEF_RX_CH, rxch->mac_addr); | |
1828 | ||
1829 | if (netif_msg_drv(priv)) | |
5c726166 C |
1830 | dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %pM\n", |
1831 | priv->mac_addr); | |
a6286ee6 AG |
1832 | |
1833 | return 0; | |
1834 | } | |
1835 | ||
1836 | /** | |
1837 | * emac_addbd_to_rx_queue: Recycle RX buffer descriptor | |
1838 | * @priv: The DaVinci EMAC private adapter structure | |
1839 | * @ch: RX channel number to process buffer descriptors for | |
1840 | * @curr_bd: current buffer descriptor | |
1841 | * @buffer: buffer pointer for descriptor | |
1842 | * @buf_token: buffer token (stores skb information) | |
1843 | * | |
1844 | * Prepares the recycled buffer descriptor and addes it to hardware | |
1845 | * receive queue - if queue empty this descriptor becomes the head | |
1846 | * else addes the descriptor to end of queue | |
1847 | * | |
1848 | */ | |
1849 | static void emac_addbd_to_rx_queue(struct emac_priv *priv, u32 ch, | |
1850 | struct emac_rx_bd __iomem *curr_bd, | |
1851 | char *buffer, void *buf_token) | |
1852 | { | |
1853 | struct emac_rxch *rxch = priv->rxch[ch]; | |
1854 | ||
1855 | /* populate the hardware descriptor */ | |
1856 | curr_bd->h_next = 0; | |
1857 | /* FIXME buff_ptr = dma_map_single(... buffer ...) */ | |
1858 | curr_bd->buff_ptr = virt_to_phys(buffer); | |
1859 | curr_bd->off_b_len = rxch->buf_size; | |
1860 | curr_bd->mode = EMAC_CPPI_OWNERSHIP_BIT; | |
1861 | curr_bd->next = NULL; | |
1862 | curr_bd->data_ptr = buffer; | |
1863 | curr_bd->buf_token = buf_token; | |
1864 | ||
1865 | /* write back */ | |
1866 | BD_CACHE_WRITEBACK_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
1867 | if (rxch->active_queue_head == NULL) { | |
1868 | rxch->active_queue_head = curr_bd; | |
1869 | rxch->active_queue_tail = curr_bd; | |
1870 | if (0 != rxch->queue_active) { | |
1871 | emac_write(EMAC_RXHDP(ch), | |
1872 | emac_virt_to_phys(rxch->active_queue_head)); | |
1873 | rxch->queue_active = 1; | |
1874 | } | |
1875 | } else { | |
1876 | struct emac_rx_bd __iomem *tail_bd; | |
1877 | u32 frame_status; | |
1878 | ||
1879 | tail_bd = rxch->active_queue_tail; | |
1880 | rxch->active_queue_tail = curr_bd; | |
1881 | tail_bd->next = curr_bd; | |
1882 | tail_bd = EMAC_VIRT_NOCACHE(tail_bd); | |
1883 | tail_bd->h_next = emac_virt_to_phys(curr_bd); | |
1884 | frame_status = tail_bd->mode; | |
1885 | if (frame_status & EMAC_CPPI_EOQ_BIT) { | |
1886 | emac_write(EMAC_RXHDP(ch), | |
1887 | emac_virt_to_phys(curr_bd)); | |
1888 | frame_status &= ~(EMAC_CPPI_EOQ_BIT); | |
1889 | tail_bd->mode = frame_status; | |
1890 | ++rxch->end_of_queue_add; | |
1891 | } | |
1892 | } | |
1893 | ++rxch->recycled_bd; | |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * emac_net_rx_cb: Prepares packet and sends to upper layer | |
1898 | * @priv: The DaVinci EMAC private adapter structure | |
1899 | * @net_pkt_list: Network packet list (received packets) | |
1900 | * | |
1901 | * Invalidates packet buffer memory and sends the received packet to upper | |
1902 | * layer | |
1903 | * | |
1904 | * Returns success or appropriate error code (none as of now) | |
1905 | */ | |
1906 | static int emac_net_rx_cb(struct emac_priv *priv, | |
1907 | struct emac_netpktobj *net_pkt_list) | |
1908 | { | |
1909 | struct sk_buff *p_skb; | |
1910 | p_skb = (struct sk_buff *)net_pkt_list->pkt_token; | |
1911 | /* set length of packet */ | |
1912 | skb_put(p_skb, net_pkt_list->pkt_length); | |
1913 | EMAC_CACHE_INVALIDATE((unsigned long)p_skb->data, p_skb->len); | |
1914 | p_skb->protocol = eth_type_trans(p_skb, priv->ndev); | |
1915 | p_skb->dev->last_rx = jiffies; | |
1916 | netif_receive_skb(p_skb); | |
1917 | priv->net_dev_stats.rx_bytes += net_pkt_list->pkt_length; | |
1918 | priv->net_dev_stats.rx_packets++; | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | /** | |
1923 | * emac_rx_bdproc: RX buffer descriptor (packet) processing | |
1924 | * @priv: The DaVinci EMAC private adapter structure | |
1925 | * @ch: RX channel number to process buffer descriptors for | |
1926 | * @budget: number of packets allowed to process | |
1927 | * @pending: indication to caller that packets are pending to process | |
1928 | * | |
1929 | * Processes RX buffer descriptors - checks ownership bit on the RX buffer | |
1930 | * descriptor, sends the receive packet to upper layer, allocates a new SKB | |
1931 | * and recycles the buffer descriptor (requeues it in hardware RX queue). | |
1932 | * Only "budget" number of packets are processed and indication of pending | |
1933 | * packets provided to the caller. | |
1934 | * | |
1935 | * Returns number of packets processed (and indication of pending packets) | |
1936 | */ | |
1937 | static int emac_rx_bdproc(struct emac_priv *priv, u32 ch, u32 budget) | |
1938 | { | |
1939 | unsigned long flags; | |
1940 | u32 frame_status; | |
1941 | u32 pkts_processed = 0; | |
1942 | char *new_buffer; | |
1943 | struct emac_rx_bd __iomem *curr_bd; | |
1944 | struct emac_rx_bd __iomem *last_bd; | |
1945 | struct emac_netpktobj *curr_pkt, pkt_obj; | |
1946 | struct emac_netbufobj buf_obj; | |
1947 | struct emac_netbufobj *rx_buf_obj; | |
1948 | void *new_buf_token; | |
1949 | struct emac_rxch *rxch = priv->rxch[ch]; | |
1950 | ||
1951 | if (unlikely(1 == rxch->teardown_pending)) | |
1952 | return 0; | |
1953 | ++rxch->proc_count; | |
1954 | spin_lock_irqsave(&priv->rx_lock, flags); | |
1955 | pkt_obj.buf_list = &buf_obj; | |
1956 | curr_pkt = &pkt_obj; | |
1957 | curr_bd = rxch->active_queue_head; | |
1958 | BD_CACHE_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
1959 | frame_status = curr_bd->mode; | |
1960 | ||
1961 | while ((curr_bd) && | |
1962 | ((frame_status & EMAC_CPPI_OWNERSHIP_BIT) == 0) && | |
1963 | (pkts_processed < budget)) { | |
1964 | ||
1965 | new_buffer = emac_net_alloc_rx_buf(priv, rxch->buf_size, | |
1966 | &new_buf_token, EMAC_DEF_RX_CH); | |
1967 | if (unlikely(NULL == new_buffer)) { | |
1968 | ++rxch->out_of_rx_buffers; | |
1969 | goto end_emac_rx_bdproc; | |
1970 | } | |
1971 | ||
1972 | /* populate received packet data structure */ | |
1973 | rx_buf_obj = &curr_pkt->buf_list[0]; | |
1974 | rx_buf_obj->data_ptr = (char *)curr_bd->data_ptr; | |
1975 | rx_buf_obj->length = curr_bd->off_b_len & EMAC_RX_BD_BUF_SIZE; | |
1976 | rx_buf_obj->buf_token = curr_bd->buf_token; | |
1977 | curr_pkt->pkt_token = curr_pkt->buf_list->buf_token; | |
1978 | curr_pkt->num_bufs = 1; | |
1979 | curr_pkt->pkt_length = | |
1980 | (frame_status & EMAC_RX_BD_PKT_LENGTH_MASK); | |
1981 | emac_write(EMAC_RXCP(ch), emac_virt_to_phys(curr_bd)); | |
1982 | ++rxch->processed_bd; | |
1983 | last_bd = curr_bd; | |
1984 | curr_bd = last_bd->next; | |
1985 | rxch->active_queue_head = curr_bd; | |
1986 | ||
1987 | /* check if end of RX queue ? */ | |
1988 | if (frame_status & EMAC_CPPI_EOQ_BIT) { | |
1989 | if (curr_bd) { | |
1990 | ++rxch->mis_queued_packets; | |
1991 | emac_write(EMAC_RXHDP(ch), | |
1992 | emac_virt_to_phys(curr_bd)); | |
1993 | } else { | |
1994 | ++rxch->end_of_queue; | |
1995 | rxch->queue_active = 0; | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | /* recycle BD */ | |
2000 | emac_addbd_to_rx_queue(priv, ch, last_bd, new_buffer, | |
2001 | new_buf_token); | |
2002 | ||
2003 | /* return the packet to the user - BD ptr passed in | |
2004 | * last parameter for potential *future* use */ | |
2005 | spin_unlock_irqrestore(&priv->rx_lock, flags); | |
2006 | emac_net_rx_cb(priv, curr_pkt); | |
2007 | spin_lock_irqsave(&priv->rx_lock, flags); | |
2008 | curr_bd = rxch->active_queue_head; | |
2009 | if (curr_bd) { | |
2010 | BD_CACHE_INVALIDATE(curr_bd, EMAC_BD_LENGTH_FOR_CACHE); | |
2011 | frame_status = curr_bd->mode; | |
2012 | } | |
2013 | ++pkts_processed; | |
2014 | } | |
2015 | ||
2016 | end_emac_rx_bdproc: | |
2017 | spin_unlock_irqrestore(&priv->rx_lock, flags); | |
2018 | return pkts_processed; | |
2019 | } | |
2020 | ||
2021 | /** | |
2022 | * emac_hw_enable: Enable EMAC hardware for packet transmission/reception | |
2023 | * @priv: The DaVinci EMAC private adapter structure | |
2024 | * | |
2025 | * Enables EMAC hardware for packet processing - enables PHY, enables RX | |
2026 | * for packet reception and enables device interrupts and then NAPI | |
2027 | * | |
2028 | * Returns success (0) or appropriate error code (none right now) | |
2029 | */ | |
2030 | static int emac_hw_enable(struct emac_priv *priv) | |
2031 | { | |
2032 | u32 ch, val, mbp_enable, mac_control; | |
2033 | ||
2034 | /* Soft reset */ | |
2035 | emac_write(EMAC_SOFTRESET, 1); | |
2036 | while (emac_read(EMAC_SOFTRESET)) | |
2037 | cpu_relax(); | |
2038 | ||
2039 | /* Disable interrupt & Set pacing for more interrupts initially */ | |
2040 | emac_int_disable(priv); | |
2041 | ||
2042 | /* Full duplex enable bit set when auto negotiation happens */ | |
2043 | mac_control = | |
2044 | (((EMAC_DEF_TXPRIO_FIXED) ? (EMAC_MACCONTROL_TXPTYPE) : 0x0) | | |
2045 | ((priv->speed == 1000) ? EMAC_MACCONTROL_GIGABITEN : 0x0) | | |
2046 | ((EMAC_DEF_TXPACING_EN) ? (EMAC_MACCONTROL_TXPACEEN) : 0x0) | | |
2047 | ((priv->duplex == DUPLEX_FULL) ? 0x1 : 0)); | |
2048 | emac_write(EMAC_MACCONTROL, mac_control); | |
2049 | ||
2050 | mbp_enable = | |
2051 | (((EMAC_DEF_PASS_CRC) ? (EMAC_RXMBP_PASSCRC_MASK) : 0x0) | | |
2052 | ((EMAC_DEF_QOS_EN) ? (EMAC_RXMBP_QOSEN_MASK) : 0x0) | | |
2053 | ((EMAC_DEF_NO_BUFF_CHAIN) ? (EMAC_RXMBP_NOCHAIN_MASK) : 0x0) | | |
2054 | ((EMAC_DEF_MACCTRL_FRAME_EN) ? (EMAC_RXMBP_CMFEN_MASK) : 0x0) | | |
2055 | ((EMAC_DEF_SHORT_FRAME_EN) ? (EMAC_RXMBP_CSFEN_MASK) : 0x0) | | |
2056 | ((EMAC_DEF_ERROR_FRAME_EN) ? (EMAC_RXMBP_CEFEN_MASK) : 0x0) | | |
2057 | ((EMAC_DEF_PROM_EN) ? (EMAC_RXMBP_CAFEN_MASK) : 0x0) | | |
2058 | ((EMAC_DEF_PROM_CH & EMAC_RXMBP_CHMASK) << \ | |
2059 | EMAC_RXMBP_PROMCH_SHIFT) | | |
2060 | ((EMAC_DEF_BCAST_EN) ? (EMAC_RXMBP_BROADEN_MASK) : 0x0) | | |
2061 | ((EMAC_DEF_BCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
2062 | EMAC_RXMBP_BROADCH_SHIFT) | | |
2063 | ((EMAC_DEF_MCAST_EN) ? (EMAC_RXMBP_MULTIEN_MASK) : 0x0) | | |
2064 | ((EMAC_DEF_MCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
2065 | EMAC_RXMBP_MULTICH_SHIFT)); | |
2066 | emac_write(EMAC_RXMBPENABLE, mbp_enable); | |
2067 | emac_write(EMAC_RXMAXLEN, (EMAC_DEF_MAX_FRAME_SIZE & | |
2068 | EMAC_RX_MAX_LEN_MASK)); | |
2069 | emac_write(EMAC_RXBUFFEROFFSET, (EMAC_DEF_BUFFER_OFFSET & | |
2070 | EMAC_RX_BUFFER_OFFSET_MASK)); | |
2071 | emac_write(EMAC_RXFILTERLOWTHRESH, 0); | |
2072 | emac_write(EMAC_RXUNICASTCLEAR, EMAC_RX_UNICAST_CLEAR_ALL); | |
2073 | priv->rx_addr_type = (emac_read(EMAC_MACCONFIG) >> 8) & 0xFF; | |
2074 | ||
2075 | val = emac_read(EMAC_TXCONTROL); | |
2076 | val |= EMAC_TX_CONTROL_TX_ENABLE_VAL; | |
2077 | emac_write(EMAC_TXCONTROL, val); | |
2078 | val = emac_read(EMAC_RXCONTROL); | |
2079 | val |= EMAC_RX_CONTROL_RX_ENABLE_VAL; | |
2080 | emac_write(EMAC_RXCONTROL, val); | |
2081 | emac_write(EMAC_MACINTMASKSET, EMAC_MAC_HOST_ERR_INTMASK_VAL); | |
2082 | ||
2083 | for (ch = 0; ch < EMAC_DEF_MAX_TX_CH; ch++) { | |
2084 | emac_write(EMAC_TXHDP(ch), 0); | |
2085 | emac_write(EMAC_TXINTMASKSET, BIT(ch)); | |
2086 | } | |
2087 | for (ch = 0; ch < EMAC_DEF_MAX_RX_CH; ch++) { | |
2088 | struct emac_rxch *rxch = priv->rxch[ch]; | |
2089 | emac_setmac(priv, ch, rxch->mac_addr); | |
2090 | emac_write(EMAC_RXINTMASKSET, BIT(ch)); | |
2091 | rxch->queue_active = 1; | |
2092 | emac_write(EMAC_RXHDP(ch), | |
2093 | emac_virt_to_phys(rxch->active_queue_head)); | |
2094 | } | |
2095 | ||
2096 | /* Enable MII */ | |
2097 | val = emac_read(EMAC_MACCONTROL); | |
2098 | val |= (EMAC_MACCONTROL_MIIEN); | |
2099 | emac_write(EMAC_MACCONTROL, val); | |
2100 | ||
2101 | /* Enable NAPI and interrupts */ | |
2102 | napi_enable(&priv->napi); | |
2103 | emac_int_enable(priv); | |
2104 | return 0; | |
2105 | ||
2106 | } | |
2107 | ||
2108 | /** | |
2109 | * emac_poll: EMAC NAPI Poll function | |
2110 | * @ndev: The DaVinci EMAC network adapter | |
2111 | * @budget: Number of receive packets to process (as told by NAPI layer) | |
2112 | * | |
2113 | * NAPI Poll function implemented to process packets as per budget. We check | |
2114 | * the type of interrupt on the device and accordingly call the TX or RX | |
2115 | * packet processing functions. We follow the budget for RX processing and | |
2116 | * also put a cap on number of TX pkts processed through config param. The | |
2117 | * NAPI schedule function is called if more packets pending. | |
2118 | * | |
2119 | * Returns number of packets received (in most cases; else TX pkts - rarely) | |
2120 | */ | |
2121 | static int emac_poll(struct napi_struct *napi, int budget) | |
2122 | { | |
2123 | unsigned int mask; | |
2124 | struct emac_priv *priv = container_of(napi, struct emac_priv, napi); | |
2125 | struct net_device *ndev = priv->ndev; | |
2126 | struct device *emac_dev = &ndev->dev; | |
2127 | u32 status = 0; | |
2128 | u32 num_pkts = 0; | |
2129 | ||
2130 | if (!netif_running(ndev)) | |
2131 | return 0; | |
2132 | ||
2133 | /* Check interrupt vectors and call packet processing */ | |
2134 | status = emac_read(EMAC_MACINVECTOR); | |
2135 | ||
2136 | mask = EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC; | |
2137 | ||
2138 | if (priv->version == EMAC_VERSION_2) | |
2139 | mask = EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC; | |
2140 | ||
2141 | if (status & mask) { | |
2142 | num_pkts = emac_tx_bdproc(priv, EMAC_DEF_TX_CH, | |
2143 | EMAC_DEF_TX_MAX_SERVICE); | |
2144 | } /* TX processing */ | |
2145 | ||
2146 | if (num_pkts) | |
2147 | return budget; | |
2148 | ||
2149 | mask = EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC; | |
2150 | ||
2151 | if (priv->version == EMAC_VERSION_2) | |
2152 | mask = EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC; | |
2153 | ||
2154 | if (status & mask) { | |
2155 | num_pkts = emac_rx_bdproc(priv, EMAC_DEF_RX_CH, budget); | |
2156 | } /* RX processing */ | |
2157 | ||
2158 | if (num_pkts < budget) { | |
2159 | napi_complete(napi); | |
2160 | emac_int_enable(priv); | |
2161 | } | |
2162 | ||
2163 | if (unlikely(status & EMAC_DM644X_MAC_IN_VECTOR_HOST_INT)) { | |
2164 | u32 ch, cause; | |
2165 | dev_err(emac_dev, "DaVinci EMAC: Fatal Hardware Error\n"); | |
2166 | netif_stop_queue(ndev); | |
2167 | napi_disable(&priv->napi); | |
2168 | ||
2169 | status = emac_read(EMAC_MACSTATUS); | |
2170 | cause = ((status & EMAC_MACSTATUS_TXERRCODE_MASK) >> | |
2171 | EMAC_MACSTATUS_TXERRCODE_SHIFT); | |
2172 | if (cause) { | |
2173 | ch = ((status & EMAC_MACSTATUS_TXERRCH_MASK) >> | |
2174 | EMAC_MACSTATUS_TXERRCH_SHIFT); | |
2175 | if (net_ratelimit()) { | |
2176 | dev_err(emac_dev, "TX Host error %s on ch=%d\n", | |
2177 | &emac_txhost_errcodes[cause][0], ch); | |
2178 | } | |
2179 | } | |
2180 | cause = ((status & EMAC_MACSTATUS_RXERRCODE_MASK) >> | |
2181 | EMAC_MACSTATUS_RXERRCODE_SHIFT); | |
2182 | if (cause) { | |
2183 | ch = ((status & EMAC_MACSTATUS_RXERRCH_MASK) >> | |
2184 | EMAC_MACSTATUS_RXERRCH_SHIFT); | |
2185 | if (netif_msg_hw(priv) && net_ratelimit()) | |
2186 | dev_err(emac_dev, "RX Host error %s on ch=%d\n", | |
2187 | &emac_rxhost_errcodes[cause][0], ch); | |
2188 | } | |
2189 | } /* Host error processing */ | |
2190 | ||
2191 | return num_pkts; | |
2192 | } | |
2193 | ||
2194 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2195 | /** | |
2196 | * emac_poll_controller: EMAC Poll controller function | |
2197 | * @ndev: The DaVinci EMAC network adapter | |
2198 | * | |
2199 | * Polled functionality used by netconsole and others in non interrupt mode | |
2200 | * | |
2201 | */ | |
2202 | void emac_poll_controller(struct net_device *ndev) | |
2203 | { | |
2204 | struct emac_priv *priv = netdev_priv(ndev); | |
2205 | ||
2206 | emac_int_disable(priv); | |
2207 | emac_irq(ndev->irq, priv); | |
2208 | emac_int_enable(priv); | |
2209 | } | |
2210 | #endif | |
2211 | ||
2212 | /* PHY/MII bus related */ | |
2213 | ||
2214 | /* Wait until mdio is ready for next command */ | |
2215 | #define MDIO_WAIT_FOR_USER_ACCESS\ | |
2216 | while ((emac_mdio_read((MDIO_USERACCESS(0))) &\ | |
2217 | MDIO_USERACCESS_GO) != 0) | |
2218 | ||
2219 | static int emac_mii_read(struct mii_bus *bus, int phy_id, int phy_reg) | |
2220 | { | |
2221 | unsigned int phy_data = 0; | |
2222 | unsigned int phy_control; | |
2223 | ||
2224 | /* Wait until mdio is ready for next command */ | |
2225 | MDIO_WAIT_FOR_USER_ACCESS; | |
2226 | ||
2227 | phy_control = (MDIO_USERACCESS_GO | | |
2228 | MDIO_USERACCESS_READ | | |
2229 | ((phy_reg << 21) & MDIO_USERACCESS_REGADR) | | |
2230 | ((phy_id << 16) & MDIO_USERACCESS_PHYADR) | | |
2231 | (phy_data & MDIO_USERACCESS_DATA)); | |
2232 | emac_mdio_write(MDIO_USERACCESS(0), phy_control); | |
2233 | ||
2234 | /* Wait until mdio is ready for next command */ | |
2235 | MDIO_WAIT_FOR_USER_ACCESS; | |
2236 | ||
2237 | return emac_mdio_read(MDIO_USERACCESS(0)) & MDIO_USERACCESS_DATA; | |
2238 | ||
2239 | } | |
2240 | ||
2241 | static int emac_mii_write(struct mii_bus *bus, int phy_id, | |
2242 | int phy_reg, u16 phy_data) | |
2243 | { | |
2244 | ||
2245 | unsigned int control; | |
2246 | ||
2247 | /* until mdio is ready for next command */ | |
2248 | MDIO_WAIT_FOR_USER_ACCESS; | |
2249 | ||
2250 | control = (MDIO_USERACCESS_GO | | |
2251 | MDIO_USERACCESS_WRITE | | |
2252 | ((phy_reg << 21) & MDIO_USERACCESS_REGADR) | | |
2253 | ((phy_id << 16) & MDIO_USERACCESS_PHYADR) | | |
2254 | (phy_data & MDIO_USERACCESS_DATA)); | |
2255 | emac_mdio_write(MDIO_USERACCESS(0), control); | |
2256 | ||
2257 | return 0; | |
2258 | } | |
2259 | ||
2260 | static int emac_mii_reset(struct mii_bus *bus) | |
2261 | { | |
2262 | unsigned int clk_div; | |
2263 | int mdio_bus_freq = emac_bus_frequency; | |
2264 | ||
2265 | if (mdio_max_freq & mdio_bus_freq) | |
2266 | clk_div = ((mdio_bus_freq / mdio_max_freq) - 1); | |
2267 | else | |
2268 | clk_div = 0xFF; | |
2269 | ||
2270 | clk_div &= MDIO_CONTROL_CLKDIV; | |
2271 | ||
2272 | /* Set enable and clock divider in MDIOControl */ | |
2273 | emac_mdio_write(MDIO_CONTROL, (clk_div | MDIO_CONTROL_ENABLE)); | |
2274 | ||
2275 | return 0; | |
2276 | ||
2277 | } | |
2278 | ||
2279 | static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, PHY_POLL }; | |
2280 | ||
2281 | /* emac_driver: EMAC MII bus structure */ | |
2282 | ||
2283 | static struct mii_bus *emac_mii; | |
2284 | ||
2285 | static void emac_adjust_link(struct net_device *ndev) | |
2286 | { | |
2287 | struct emac_priv *priv = netdev_priv(ndev); | |
2288 | struct phy_device *phydev = priv->phydev; | |
2289 | unsigned long flags; | |
2290 | int new_state = 0; | |
2291 | ||
2292 | spin_lock_irqsave(&priv->lock, flags); | |
2293 | ||
2294 | if (phydev->link) { | |
2295 | /* check the mode of operation - full/half duplex */ | |
2296 | if (phydev->duplex != priv->duplex) { | |
2297 | new_state = 1; | |
2298 | priv->duplex = phydev->duplex; | |
2299 | } | |
2300 | if (phydev->speed != priv->speed) { | |
2301 | new_state = 1; | |
2302 | priv->speed = phydev->speed; | |
2303 | } | |
2304 | if (!priv->link) { | |
2305 | new_state = 1; | |
2306 | priv->link = 1; | |
2307 | } | |
2308 | ||
2309 | } else if (priv->link) { | |
2310 | new_state = 1; | |
2311 | priv->link = 0; | |
2312 | priv->speed = 0; | |
2313 | priv->duplex = ~0; | |
2314 | } | |
2315 | if (new_state) { | |
2316 | emac_update_phystatus(priv); | |
2317 | phy_print_status(priv->phydev); | |
2318 | } | |
2319 | ||
2320 | spin_unlock_irqrestore(&priv->lock, flags); | |
2321 | } | |
2322 | ||
2323 | /************************************************************************* | |
2324 | * Linux Driver Model | |
2325 | *************************************************************************/ | |
2326 | ||
2327 | /** | |
2328 | * emac_devioctl: EMAC adapter ioctl | |
2329 | * @ndev: The DaVinci EMAC network adapter | |
2330 | * @ifrq: request parameter | |
2331 | * @cmd: command parameter | |
2332 | * | |
2333 | * EMAC driver ioctl function | |
2334 | * | |
2335 | * Returns success(0) or appropriate error code | |
2336 | */ | |
2337 | static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd) | |
2338 | { | |
2339 | dev_warn(&ndev->dev, "DaVinci EMAC: ioctl not supported\n"); | |
2340 | ||
2341 | if (!(netif_running(ndev))) | |
2342 | return -EINVAL; | |
2343 | ||
2344 | /* TODO: Add phy read and write and private statistics get feature */ | |
2345 | ||
2346 | return -EOPNOTSUPP; | |
2347 | } | |
2348 | ||
2349 | /** | |
2350 | * emac_dev_open: EMAC device open | |
2351 | * @ndev: The DaVinci EMAC network adapter | |
2352 | * | |
2353 | * Called when system wants to start the interface. We init TX/RX channels | |
2354 | * and enable the hardware for packet reception/transmission and start the | |
2355 | * network queue. | |
2356 | * | |
2357 | * Returns 0 for a successful open, or appropriate error code | |
2358 | */ | |
2359 | static int emac_dev_open(struct net_device *ndev) | |
2360 | { | |
2361 | struct device *emac_dev = &ndev->dev; | |
2362 | u32 rc, cnt, ch; | |
2363 | int phy_addr; | |
2364 | struct resource *res; | |
2365 | int q, m; | |
2366 | int i = 0; | |
2367 | int k = 0; | |
2368 | struct emac_priv *priv = netdev_priv(ndev); | |
2369 | ||
2370 | netif_carrier_off(ndev); | |
2371 | for (cnt = 0; cnt <= ETH_ALEN; cnt++) | |
2372 | ndev->dev_addr[cnt] = priv->mac_addr[cnt]; | |
2373 | ||
2374 | /* Configuration items */ | |
2375 | priv->rx_buf_size = EMAC_DEF_MAX_FRAME_SIZE + NET_IP_ALIGN; | |
2376 | ||
2377 | /* Clear basic hardware */ | |
2378 | for (ch = 0; ch < EMAC_MAX_TXRX_CHANNELS; ch++) { | |
2379 | emac_write(EMAC_TXHDP(ch), 0); | |
2380 | emac_write(EMAC_RXHDP(ch), 0); | |
2381 | emac_write(EMAC_RXHDP(ch), 0); | |
2382 | emac_write(EMAC_RXINTMASKCLEAR, EMAC_INT_MASK_CLEAR); | |
2383 | emac_write(EMAC_TXINTMASKCLEAR, EMAC_INT_MASK_CLEAR); | |
2384 | } | |
2385 | priv->mac_hash1 = 0; | |
2386 | priv->mac_hash2 = 0; | |
2387 | emac_write(EMAC_MACHASH1, 0); | |
2388 | emac_write(EMAC_MACHASH2, 0); | |
2389 | ||
2390 | /* multi ch not supported - open 1 TX, 1RX ch by default */ | |
2391 | rc = emac_init_txch(priv, EMAC_DEF_TX_CH); | |
2392 | if (0 != rc) { | |
2393 | dev_err(emac_dev, "DaVinci EMAC: emac_init_txch() failed"); | |
2394 | return rc; | |
2395 | } | |
2396 | rc = emac_init_rxch(priv, EMAC_DEF_RX_CH, priv->mac_addr); | |
2397 | if (0 != rc) { | |
2398 | dev_err(emac_dev, "DaVinci EMAC: emac_init_rxch() failed"); | |
2399 | return rc; | |
2400 | } | |
2401 | ||
2402 | /* Request IRQ */ | |
2403 | ||
2404 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) { | |
2405 | for (i = res->start; i <= res->end; i++) { | |
2406 | if (request_irq(i, emac_irq, IRQF_DISABLED, | |
2407 | ndev->name, ndev)) | |
2408 | goto rollback; | |
2409 | } | |
2410 | k++; | |
2411 | } | |
2412 | ||
2413 | /* Start/Enable EMAC hardware */ | |
2414 | emac_hw_enable(priv); | |
2415 | ||
2416 | /* find the first phy */ | |
2417 | priv->phydev = NULL; | |
2418 | if (priv->phy_mask) { | |
2419 | emac_mii_reset(priv->mii_bus); | |
2420 | for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { | |
2421 | if (priv->mii_bus->phy_map[phy_addr]) { | |
2422 | priv->phydev = priv->mii_bus->phy_map[phy_addr]; | |
2423 | break; | |
2424 | } | |
2425 | } | |
2426 | ||
2427 | if (!priv->phydev) { | |
2428 | printk(KERN_ERR "%s: no PHY found\n", ndev->name); | |
2429 | return -1; | |
2430 | } | |
2431 | ||
2432 | priv->phydev = phy_connect(ndev, dev_name(&priv->phydev->dev), | |
2433 | &emac_adjust_link, 0, PHY_INTERFACE_MODE_MII); | |
2434 | ||
2435 | if (IS_ERR(priv->phydev)) { | |
2436 | printk(KERN_ERR "%s: Could not attach to PHY\n", | |
2437 | ndev->name); | |
2438 | return PTR_ERR(priv->phydev); | |
2439 | } | |
2440 | ||
2441 | priv->link = 0; | |
2442 | priv->speed = 0; | |
2443 | priv->duplex = ~0; | |
2444 | ||
2445 | printk(KERN_INFO "%s: attached PHY driver [%s] " | |
2446 | "(mii_bus:phy_addr=%s, id=%x)\n", ndev->name, | |
2447 | priv->phydev->drv->name, dev_name(&priv->phydev->dev), | |
2448 | priv->phydev->phy_id); | |
2449 | } else{ | |
2450 | /* No PHY , fix the link, speed and duplex settings */ | |
2451 | priv->link = 1; | |
2452 | priv->speed = SPEED_100; | |
2453 | priv->duplex = DUPLEX_FULL; | |
2454 | emac_update_phystatus(priv); | |
2455 | } | |
2456 | ||
2457 | if (!netif_running(ndev)) /* debug only - to avoid compiler warning */ | |
2458 | emac_dump_regs(priv); | |
2459 | ||
2460 | if (netif_msg_drv(priv)) | |
2461 | dev_notice(emac_dev, "DaVinci EMAC: Opened %s\n", ndev->name); | |
2462 | ||
2463 | if (priv->phy_mask) | |
2464 | phy_start(priv->phydev); | |
2465 | ||
2466 | return 0; | |
2467 | ||
2468 | rollback: | |
2469 | ||
2470 | dev_err(emac_dev, "DaVinci EMAC: request_irq() failed"); | |
2471 | ||
2472 | for (q = k; k >= 0; k--) { | |
2473 | for (m = i; m >= res->start; m--) | |
2474 | free_irq(m, ndev); | |
2475 | res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k-1); | |
2476 | m = res->end; | |
2477 | } | |
2478 | return -EBUSY; | |
2479 | } | |
2480 | ||
2481 | /** | |
2482 | * emac_dev_stop: EMAC device stop | |
2483 | * @ndev: The DaVinci EMAC network adapter | |
2484 | * | |
2485 | * Called when system wants to stop or down the interface. We stop the network | |
2486 | * queue, disable interrupts and cleanup TX/RX channels. | |
2487 | * | |
2488 | * We return the statistics in net_device_stats structure pulled from emac | |
2489 | */ | |
2490 | static int emac_dev_stop(struct net_device *ndev) | |
2491 | { | |
2492 | struct resource *res; | |
2493 | int i = 0; | |
2494 | int irq_num; | |
2495 | struct emac_priv *priv = netdev_priv(ndev); | |
2496 | struct device *emac_dev = &ndev->dev; | |
2497 | ||
2498 | /* inform the upper layers. */ | |
2499 | netif_stop_queue(ndev); | |
2500 | napi_disable(&priv->napi); | |
2501 | ||
2502 | netif_carrier_off(ndev); | |
2503 | emac_int_disable(priv); | |
2504 | emac_stop_txch(priv, EMAC_DEF_TX_CH); | |
2505 | emac_stop_rxch(priv, EMAC_DEF_RX_CH); | |
2506 | emac_cleanup_txch(priv, EMAC_DEF_TX_CH); | |
2507 | emac_cleanup_rxch(priv, EMAC_DEF_RX_CH); | |
2508 | emac_write(EMAC_SOFTRESET, 1); | |
2509 | ||
2510 | if (priv->phydev) | |
2511 | phy_disconnect(priv->phydev); | |
2512 | ||
2513 | /* Free IRQ */ | |
2514 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, i))) { | |
2515 | for (irq_num = res->start; irq_num <= res->end; irq_num++) | |
2516 | free_irq(irq_num, priv->ndev); | |
2517 | i++; | |
2518 | } | |
2519 | ||
2520 | if (netif_msg_drv(priv)) | |
2521 | dev_notice(emac_dev, "DaVinci EMAC: %s stopped\n", ndev->name); | |
2522 | ||
2523 | return 0; | |
2524 | } | |
2525 | ||
2526 | /** | |
2527 | * emac_dev_getnetstats: EMAC get statistics function | |
2528 | * @ndev: The DaVinci EMAC network adapter | |
2529 | * | |
2530 | * Called when system wants to get statistics from the device. | |
2531 | * | |
2532 | * We return the statistics in net_device_stats structure pulled from emac | |
2533 | */ | |
2534 | static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev) | |
2535 | { | |
2536 | struct emac_priv *priv = netdev_priv(ndev); | |
2537 | ||
2538 | /* update emac hardware stats and reset the registers*/ | |
2539 | ||
2540 | priv->net_dev_stats.multicast += emac_read(EMAC_RXMCASTFRAMES); | |
2541 | emac_write(EMAC_RXMCASTFRAMES, EMAC_ALL_MULTI_REG_VALUE); | |
2542 | ||
2543 | priv->net_dev_stats.collisions += (emac_read(EMAC_TXCOLLISION) + | |
2544 | emac_read(EMAC_TXSINGLECOLL) + | |
2545 | emac_read(EMAC_TXMULTICOLL)); | |
2546 | emac_write(EMAC_TXCOLLISION, EMAC_ALL_MULTI_REG_VALUE); | |
2547 | emac_write(EMAC_TXSINGLECOLL, EMAC_ALL_MULTI_REG_VALUE); | |
2548 | emac_write(EMAC_TXMULTICOLL, EMAC_ALL_MULTI_REG_VALUE); | |
2549 | ||
2550 | priv->net_dev_stats.rx_length_errors += (emac_read(EMAC_RXOVERSIZED) + | |
2551 | emac_read(EMAC_RXJABBER) + | |
2552 | emac_read(EMAC_RXUNDERSIZED)); | |
2553 | emac_write(EMAC_RXOVERSIZED, EMAC_ALL_MULTI_REG_VALUE); | |
2554 | emac_write(EMAC_RXJABBER, EMAC_ALL_MULTI_REG_VALUE); | |
2555 | emac_write(EMAC_RXUNDERSIZED, EMAC_ALL_MULTI_REG_VALUE); | |
2556 | ||
2557 | priv->net_dev_stats.rx_over_errors += (emac_read(EMAC_RXSOFOVERRUNS) + | |
2558 | emac_read(EMAC_RXMOFOVERRUNS)); | |
2559 | emac_write(EMAC_RXSOFOVERRUNS, EMAC_ALL_MULTI_REG_VALUE); | |
2560 | emac_write(EMAC_RXMOFOVERRUNS, EMAC_ALL_MULTI_REG_VALUE); | |
2561 | ||
2562 | priv->net_dev_stats.rx_fifo_errors += emac_read(EMAC_RXDMAOVERRUNS); | |
2563 | emac_write(EMAC_RXDMAOVERRUNS, EMAC_ALL_MULTI_REG_VALUE); | |
2564 | ||
2565 | priv->net_dev_stats.tx_carrier_errors += | |
2566 | emac_read(EMAC_TXCARRIERSENSE); | |
2567 | emac_write(EMAC_TXCARRIERSENSE, EMAC_ALL_MULTI_REG_VALUE); | |
2568 | ||
2569 | priv->net_dev_stats.tx_fifo_errors = emac_read(EMAC_TXUNDERRUN); | |
2570 | emac_write(EMAC_TXUNDERRUN, EMAC_ALL_MULTI_REG_VALUE); | |
2571 | ||
2572 | return &priv->net_dev_stats; | |
2573 | } | |
2574 | ||
2575 | static const struct net_device_ops emac_netdev_ops = { | |
2576 | .ndo_open = emac_dev_open, | |
2577 | .ndo_stop = emac_dev_stop, | |
2578 | .ndo_start_xmit = emac_dev_xmit, | |
2579 | .ndo_set_multicast_list = emac_dev_mcast_set, | |
2580 | .ndo_set_mac_address = emac_dev_setmac_addr, | |
2581 | .ndo_do_ioctl = emac_devioctl, | |
2582 | .ndo_tx_timeout = emac_dev_tx_timeout, | |
2583 | .ndo_get_stats = emac_dev_getnetstats, | |
2584 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2585 | .ndo_poll_controller = emac_poll_controller, | |
2586 | #endif | |
2587 | }; | |
2588 | ||
2589 | /** | |
2590 | * davinci_emac_probe: EMAC device probe | |
2591 | * @pdev: The DaVinci EMAC device that we are removing | |
2592 | * | |
2593 | * Called when probing for emac devicesr. We get details of instances and | |
2594 | * resource information from platform init and register a network device | |
2595 | * and allocate resources necessary for driver to perform | |
2596 | */ | |
2597 | static int __devinit davinci_emac_probe(struct platform_device *pdev) | |
2598 | { | |
2599 | int rc = 0; | |
2600 | struct resource *res; | |
2601 | struct net_device *ndev; | |
2602 | struct emac_priv *priv; | |
2603 | unsigned long size; | |
2604 | struct emac_platform_data *pdata; | |
2605 | struct device *emac_dev; | |
2606 | ||
2607 | /* obtain emac clock from kernel */ | |
2608 | emac_clk = clk_get(&pdev->dev, NULL); | |
2609 | if (IS_ERR(emac_clk)) { | |
2610 | printk(KERN_ERR "DaVinci EMAC: Failed to get EMAC clock\n"); | |
2611 | return -EBUSY; | |
2612 | } | |
2613 | emac_bus_frequency = clk_get_rate(emac_clk); | |
2614 | /* TODO: Probe PHY here if possible */ | |
2615 | ||
2616 | ndev = alloc_etherdev(sizeof(struct emac_priv)); | |
2617 | if (!ndev) { | |
2618 | printk(KERN_ERR "DaVinci EMAC: Error allocating net_device\n"); | |
2619 | clk_put(emac_clk); | |
2620 | return -ENOMEM; | |
2621 | } | |
2622 | ||
2623 | platform_set_drvdata(pdev, ndev); | |
2624 | priv = netdev_priv(ndev); | |
2625 | priv->pdev = pdev; | |
2626 | priv->ndev = ndev; | |
2627 | priv->msg_enable = netif_msg_init(debug_level, DAVINCI_EMAC_DEBUG); | |
2628 | ||
2629 | spin_lock_init(&priv->tx_lock); | |
2630 | spin_lock_init(&priv->rx_lock); | |
2631 | spin_lock_init(&priv->lock); | |
2632 | ||
2633 | pdata = pdev->dev.platform_data; | |
2634 | if (!pdata) { | |
2635 | printk(KERN_ERR "DaVinci EMAC: No platfrom data\n"); | |
2636 | return -ENODEV; | |
2637 | } | |
2638 | ||
2639 | /* MAC addr and PHY mask , RMII enable info from platform_data */ | |
2640 | memcpy(priv->mac_addr, pdata->mac_addr, 6); | |
2641 | priv->phy_mask = pdata->phy_mask; | |
2642 | priv->rmii_en = pdata->rmii_en; | |
2643 | priv->version = pdata->version; | |
2644 | emac_dev = &ndev->dev; | |
2645 | /* Get EMAC platform data */ | |
2646 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2647 | if (!res) { | |
2648 | dev_err(emac_dev, "DaVinci EMAC: Error getting res\n"); | |
2649 | rc = -ENOENT; | |
2650 | goto probe_quit; | |
2651 | } | |
2652 | ||
2653 | priv->emac_base_phys = res->start + pdata->ctrl_reg_offset; | |
2654 | size = res->end - res->start + 1; | |
2655 | if (!request_mem_region(res->start, size, ndev->name)) { | |
2656 | dev_err(emac_dev, "DaVinci EMAC: failed request_mem_region() \ | |
2657 | for regs\n"); | |
2658 | rc = -ENXIO; | |
2659 | goto probe_quit; | |
2660 | } | |
2661 | ||
2662 | priv->remap_addr = ioremap(res->start, size); | |
2663 | if (!priv->remap_addr) { | |
2664 | dev_err(emac_dev, "Unable to map IO\n"); | |
2665 | rc = -ENOMEM; | |
2666 | release_mem_region(res->start, size); | |
2667 | goto probe_quit; | |
2668 | } | |
2669 | priv->emac_base = priv->remap_addr + pdata->ctrl_reg_offset; | |
2670 | ndev->base_addr = (unsigned long)priv->remap_addr; | |
2671 | ||
2672 | priv->ctrl_base = priv->remap_addr + pdata->ctrl_mod_reg_offset; | |
2673 | priv->ctrl_ram_size = pdata->ctrl_ram_size; | |
2674 | priv->emac_ctrl_ram = priv->remap_addr + pdata->ctrl_ram_offset; | |
2675 | ||
2676 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2677 | if (!res) { | |
2678 | dev_err(emac_dev, "DaVinci EMAC: Error getting irq res\n"); | |
2679 | rc = -ENOENT; | |
2680 | goto no_irq_res; | |
2681 | } | |
2682 | ndev->irq = res->start; | |
2683 | ||
2684 | if (!is_valid_ether_addr(priv->mac_addr)) { | |
a6286ee6 AG |
2685 | /* Use random MAC if none passed */ |
2686 | random_ether_addr(priv->mac_addr); | |
5c726166 C |
2687 | printk(KERN_WARNING "%s: using random MAC addr: %pM\n", |
2688 | __func__, priv->mac_addr); | |
a6286ee6 AG |
2689 | } |
2690 | ||
2691 | ndev->netdev_ops = &emac_netdev_ops; | |
2692 | SET_ETHTOOL_OPS(ndev, ðtool_ops); | |
2693 | netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT); | |
2694 | ||
2695 | /* register the network device */ | |
2696 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
2697 | rc = register_netdev(ndev); | |
2698 | if (rc) { | |
2699 | dev_err(emac_dev, "DaVinci EMAC: Error in register_netdev\n"); | |
2700 | rc = -ENODEV; | |
2701 | goto netdev_reg_err; | |
2702 | } | |
2703 | ||
2704 | clk_enable(emac_clk); | |
2705 | ||
2706 | /* MII/Phy intialisation, mdio bus registration */ | |
2707 | emac_mii = mdiobus_alloc(); | |
2708 | if (emac_mii == NULL) { | |
2709 | dev_err(emac_dev, "DaVinci EMAC: Error allocating mii_bus\n"); | |
2710 | rc = -ENOMEM; | |
2711 | goto mdio_alloc_err; | |
2712 | } | |
2713 | ||
2714 | priv->mii_bus = emac_mii; | |
2715 | emac_mii->name = "emac-mii", | |
2716 | emac_mii->read = emac_mii_read, | |
2717 | emac_mii->write = emac_mii_write, | |
2718 | emac_mii->reset = emac_mii_reset, | |
2719 | emac_mii->irq = mii_irqs, | |
2720 | emac_mii->phy_mask = ~(priv->phy_mask); | |
2721 | emac_mii->parent = &pdev->dev; | |
2722 | emac_mii->priv = priv->remap_addr + pdata->mdio_reg_offset; | |
2723 | snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", priv->pdev->id); | |
2724 | mdio_max_freq = pdata->mdio_max_freq; | |
2725 | emac_mii->reset(emac_mii); | |
2726 | ||
2727 | /* Register the MII bus */ | |
2728 | rc = mdiobus_register(emac_mii); | |
2729 | if (rc) | |
2730 | goto mdiobus_quit; | |
2731 | ||
2732 | if (netif_msg_probe(priv)) { | |
2733 | dev_notice(emac_dev, "DaVinci EMAC Probe found device "\ | |
2734 | "(regs: %p, irq: %d)\n", | |
2735 | (void *)priv->emac_base_phys, ndev->irq); | |
2736 | } | |
2737 | return 0; | |
2738 | ||
2739 | mdiobus_quit: | |
2740 | mdiobus_free(emac_mii); | |
2741 | ||
2742 | netdev_reg_err: | |
2743 | mdio_alloc_err: | |
2744 | no_irq_res: | |
2745 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2746 | release_mem_region(res->start, res->end - res->start + 1); | |
2747 | iounmap(priv->remap_addr); | |
2748 | ||
2749 | probe_quit: | |
2750 | clk_put(emac_clk); | |
2751 | free_netdev(ndev); | |
2752 | return rc; | |
2753 | } | |
2754 | ||
2755 | /** | |
2756 | * davinci_emac_remove: EMAC device remove | |
2757 | * @pdev: The DaVinci EMAC device that we are removing | |
2758 | * | |
2759 | * Called when removing the device driver. We disable clock usage and release | |
2760 | * the resources taken up by the driver and unregister network device | |
2761 | */ | |
2762 | static int __devexit davinci_emac_remove(struct platform_device *pdev) | |
2763 | { | |
2764 | struct resource *res; | |
2765 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2766 | struct emac_priv *priv = netdev_priv(ndev); | |
2767 | ||
2768 | dev_notice(&ndev->dev, "DaVinci EMAC: davinci_emac_remove()\n"); | |
2769 | ||
a6286ee6 AG |
2770 | platform_set_drvdata(pdev, NULL); |
2771 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2772 | mdiobus_unregister(priv->mii_bus); | |
2773 | mdiobus_free(priv->mii_bus); | |
2774 | ||
2775 | release_mem_region(res->start, res->end - res->start + 1); | |
2776 | ||
2777 | unregister_netdev(ndev); | |
2778 | free_netdev(ndev); | |
2779 | iounmap(priv->remap_addr); | |
2780 | ||
2781 | clk_disable(emac_clk); | |
2782 | clk_put(emac_clk); | |
2783 | ||
2784 | return 0; | |
2785 | } | |
2786 | ||
2787 | /** | |
2788 | * davinci_emac_driver: EMAC platform driver structure | |
2789 | * | |
2790 | * We implement only probe and remove functions - suspend/resume and | |
2791 | * others not supported by this module | |
2792 | */ | |
2793 | static struct platform_driver davinci_emac_driver = { | |
2794 | .driver = { | |
2795 | .name = "davinci_emac", | |
2796 | .owner = THIS_MODULE, | |
2797 | }, | |
2798 | .probe = davinci_emac_probe, | |
2799 | .remove = __devexit_p(davinci_emac_remove), | |
2800 | }; | |
2801 | ||
2802 | /** | |
2803 | * davinci_emac_init: EMAC driver module init | |
2804 | * | |
2805 | * Called when initializing the driver. We register the driver with | |
2806 | * the platform. | |
2807 | */ | |
2808 | static int __init davinci_emac_init(void) | |
2809 | { | |
2810 | return platform_driver_register(&davinci_emac_driver); | |
2811 | } | |
2812 | module_init(davinci_emac_init); | |
2813 | ||
2814 | /** | |
2815 | * davinci_emac_exit: EMAC driver module exit | |
2816 | * | |
2817 | * Called when exiting the driver completely. We unregister the driver with | |
2818 | * the platform and exit | |
2819 | */ | |
2820 | static void __exit davinci_emac_exit(void) | |
2821 | { | |
2822 | platform_driver_unregister(&davinci_emac_driver); | |
2823 | } | |
2824 | module_exit(davinci_emac_exit); | |
2825 | ||
2826 | MODULE_LICENSE("GPL"); | |
2827 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Anant Gole <anantgole@ti.com>"); | |
2828 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Chaithrika U S <chaithrika@ti.com>"); | |
2829 | MODULE_DESCRIPTION("DaVinci EMAC Ethernet driver"); |