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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 | #include <linux/module.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/timer.h> | |
37 | #include <linux/errno.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/slab.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/interrupt.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/netdevice.h> | |
45 | #include <linux/etherdevice.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/ethtool.h> | |
48 | #include <linux/highmem.h> | |
49 | #include <linux/proc_fs.h> | |
50 | #include <linux/ctype.h> | |
51 | #include <linux/spinlock.h> | |
52 | #include <linux/dma-mapping.h> | |
53 | #include <linux/clk.h> | |
54 | #include <linux/platform_device.h> | |
55 | #include <linux/semaphore.h> | |
56 | #include <linux/phy.h> | |
57 | #include <linux/bitops.h> | |
58 | #include <linux/io.h> | |
59 | #include <linux/uaccess.h> | |
60 | #include <linux/davinci_emac.h> | |
61 | ||
62 | #include <asm/irq.h> | |
63 | #include <asm/page.h> | |
64 | ||
65 | #include "davinci_cpdma.h" | |
66 | ||
67 | static int debug_level; | |
68 | module_param(debug_level, int, 0); | |
69 | MODULE_PARM_DESC(debug_level, "DaVinci EMAC debug level (NETIF_MSG bits)"); | |
70 | ||
71 | /* Netif debug messages possible */ | |
72 | #define DAVINCI_EMAC_DEBUG (NETIF_MSG_DRV | \ | |
73 | NETIF_MSG_PROBE | \ | |
74 | NETIF_MSG_LINK | \ | |
75 | NETIF_MSG_TIMER | \ | |
76 | NETIF_MSG_IFDOWN | \ | |
77 | NETIF_MSG_IFUP | \ | |
78 | NETIF_MSG_RX_ERR | \ | |
79 | NETIF_MSG_TX_ERR | \ | |
80 | NETIF_MSG_TX_QUEUED | \ | |
81 | NETIF_MSG_INTR | \ | |
82 | NETIF_MSG_TX_DONE | \ | |
83 | NETIF_MSG_RX_STATUS | \ | |
84 | NETIF_MSG_PKTDATA | \ | |
85 | NETIF_MSG_HW | \ | |
86 | NETIF_MSG_WOL) | |
87 | ||
88 | /* version info */ | |
89 | #define EMAC_MAJOR_VERSION 6 | |
90 | #define EMAC_MINOR_VERSION 1 | |
91 | #define EMAC_MODULE_VERSION "6.1" | |
92 | MODULE_VERSION(EMAC_MODULE_VERSION); | |
93 | static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1"; | |
94 | ||
95 | /* Configuration items */ | |
96 | #define EMAC_DEF_PASS_CRC (0) /* Do not pass CRC up to frames */ | |
97 | #define EMAC_DEF_QOS_EN (0) /* EMAC proprietary QoS disabled */ | |
98 | #define EMAC_DEF_NO_BUFF_CHAIN (0) /* No buffer chain */ | |
99 | #define EMAC_DEF_MACCTRL_FRAME_EN (0) /* Discard Maccontrol frames */ | |
100 | #define EMAC_DEF_SHORT_FRAME_EN (0) /* Discard short frames */ | |
101 | #define EMAC_DEF_ERROR_FRAME_EN (0) /* Discard error frames */ | |
102 | #define EMAC_DEF_PROM_EN (0) /* Promiscuous disabled */ | |
103 | #define EMAC_DEF_PROM_CH (0) /* Promiscuous channel is 0 */ | |
104 | #define EMAC_DEF_BCAST_EN (1) /* Broadcast enabled */ | |
105 | #define EMAC_DEF_BCAST_CH (0) /* Broadcast channel is 0 */ | |
106 | #define EMAC_DEF_MCAST_EN (1) /* Multicast enabled */ | |
107 | #define EMAC_DEF_MCAST_CH (0) /* Multicast channel is 0 */ | |
108 | ||
109 | #define EMAC_DEF_TXPRIO_FIXED (1) /* TX Priority is fixed */ | |
110 | #define EMAC_DEF_TXPACING_EN (0) /* TX pacing NOT supported*/ | |
111 | ||
112 | #define EMAC_DEF_BUFFER_OFFSET (0) /* Buffer offset to DMA (future) */ | |
113 | #define EMAC_DEF_MIN_ETHPKTSIZE (60) /* Minimum ethernet pkt size */ | |
114 | #define EMAC_DEF_MAX_FRAME_SIZE (1500 + 14 + 4 + 4) | |
115 | #define EMAC_DEF_TX_CH (0) /* Default 0th channel */ | |
116 | #define EMAC_DEF_RX_CH (0) /* Default 0th channel */ | |
117 | #define EMAC_DEF_RX_NUM_DESC (128) | |
118 | #define EMAC_DEF_TX_NUM_DESC (128) | |
119 | #define EMAC_DEF_MAX_TX_CH (1) /* Max TX channels configured */ | |
120 | #define EMAC_DEF_MAX_RX_CH (1) /* Max RX channels configured */ | |
121 | #define EMAC_POLL_WEIGHT (64) /* Default NAPI poll weight */ | |
122 | ||
123 | /* Buffer descriptor parameters */ | |
124 | #define EMAC_DEF_TX_MAX_SERVICE (32) /* TX max service BD's */ | |
125 | #define EMAC_DEF_RX_MAX_SERVICE (64) /* should = netdev->weight */ | |
126 | ||
127 | /* EMAC register related defines */ | |
128 | #define EMAC_ALL_MULTI_REG_VALUE (0xFFFFFFFF) | |
129 | #define EMAC_NUM_MULTICAST_BITS (64) | |
130 | #define EMAC_TX_CONTROL_TX_ENABLE_VAL (0x1) | |
131 | #define EMAC_RX_CONTROL_RX_ENABLE_VAL (0x1) | |
132 | #define EMAC_MAC_HOST_ERR_INTMASK_VAL (0x2) | |
133 | #define EMAC_RX_UNICAST_CLEAR_ALL (0xFF) | |
134 | #define EMAC_INT_MASK_CLEAR (0xFF) | |
135 | ||
136 | /* RX MBP register bit positions */ | |
137 | #define EMAC_RXMBP_PASSCRC_MASK BIT(30) | |
138 | #define EMAC_RXMBP_QOSEN_MASK BIT(29) | |
139 | #define EMAC_RXMBP_NOCHAIN_MASK BIT(28) | |
140 | #define EMAC_RXMBP_CMFEN_MASK BIT(24) | |
141 | #define EMAC_RXMBP_CSFEN_MASK BIT(23) | |
142 | #define EMAC_RXMBP_CEFEN_MASK BIT(22) | |
143 | #define EMAC_RXMBP_CAFEN_MASK BIT(21) | |
144 | #define EMAC_RXMBP_PROMCH_SHIFT (16) | |
145 | #define EMAC_RXMBP_PROMCH_MASK (0x7 << 16) | |
146 | #define EMAC_RXMBP_BROADEN_MASK BIT(13) | |
147 | #define EMAC_RXMBP_BROADCH_SHIFT (8) | |
148 | #define EMAC_RXMBP_BROADCH_MASK (0x7 << 8) | |
149 | #define EMAC_RXMBP_MULTIEN_MASK BIT(5) | |
150 | #define EMAC_RXMBP_MULTICH_SHIFT (0) | |
151 | #define EMAC_RXMBP_MULTICH_MASK (0x7) | |
152 | #define EMAC_RXMBP_CHMASK (0x7) | |
153 | ||
154 | /* EMAC register definitions/bit maps used */ | |
155 | # define EMAC_MBP_RXPROMISC (0x00200000) | |
156 | # define EMAC_MBP_PROMISCCH(ch) (((ch) & 0x7) << 16) | |
157 | # define EMAC_MBP_RXBCAST (0x00002000) | |
158 | # define EMAC_MBP_BCASTCHAN(ch) (((ch) & 0x7) << 8) | |
159 | # define EMAC_MBP_RXMCAST (0x00000020) | |
160 | # define EMAC_MBP_MCASTCHAN(ch) ((ch) & 0x7) | |
161 | ||
162 | /* EMAC mac_control register */ | |
163 | #define EMAC_MACCONTROL_TXPTYPE BIT(9) | |
164 | #define EMAC_MACCONTROL_TXPACEEN BIT(6) | |
165 | #define EMAC_MACCONTROL_GMIIEN BIT(5) | |
166 | #define EMAC_MACCONTROL_GIGABITEN BIT(7) | |
167 | #define EMAC_MACCONTROL_FULLDUPLEXEN BIT(0) | |
168 | #define EMAC_MACCONTROL_RMIISPEED_MASK BIT(15) | |
169 | ||
170 | /* GIGABIT MODE related bits */ | |
171 | #define EMAC_DM646X_MACCONTORL_GIG BIT(7) | |
172 | #define EMAC_DM646X_MACCONTORL_GIGFORCE BIT(17) | |
173 | ||
174 | /* EMAC mac_status register */ | |
175 | #define EMAC_MACSTATUS_TXERRCODE_MASK (0xF00000) | |
176 | #define EMAC_MACSTATUS_TXERRCODE_SHIFT (20) | |
177 | #define EMAC_MACSTATUS_TXERRCH_MASK (0x7) | |
178 | #define EMAC_MACSTATUS_TXERRCH_SHIFT (16) | |
179 | #define EMAC_MACSTATUS_RXERRCODE_MASK (0xF000) | |
180 | #define EMAC_MACSTATUS_RXERRCODE_SHIFT (12) | |
181 | #define EMAC_MACSTATUS_RXERRCH_MASK (0x7) | |
182 | #define EMAC_MACSTATUS_RXERRCH_SHIFT (8) | |
183 | ||
184 | /* EMAC RX register masks */ | |
185 | #define EMAC_RX_MAX_LEN_MASK (0xFFFF) | |
186 | #define EMAC_RX_BUFFER_OFFSET_MASK (0xFFFF) | |
187 | ||
188 | /* MAC_IN_VECTOR (0x180) register bit fields */ | |
189 | #define EMAC_DM644X_MAC_IN_VECTOR_HOST_INT BIT(17) | |
190 | #define EMAC_DM644X_MAC_IN_VECTOR_STATPEND_INT BIT(16) | |
191 | #define EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC BIT(8) | |
192 | #define EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC BIT(0) | |
193 | ||
194 | /** NOTE:: For DM646x the IN_VECTOR has changed */ | |
195 | #define EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC BIT(EMAC_DEF_RX_CH) | |
196 | #define EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC BIT(16 + EMAC_DEF_TX_CH) | |
197 | #define EMAC_DM646X_MAC_IN_VECTOR_HOST_INT BIT(26) | |
198 | #define EMAC_DM646X_MAC_IN_VECTOR_STATPEND_INT BIT(27) | |
199 | ||
200 | /* CPPI bit positions */ | |
201 | #define EMAC_CPPI_SOP_BIT BIT(31) | |
202 | #define EMAC_CPPI_EOP_BIT BIT(30) | |
203 | #define EMAC_CPPI_OWNERSHIP_BIT BIT(29) | |
204 | #define EMAC_CPPI_EOQ_BIT BIT(28) | |
205 | #define EMAC_CPPI_TEARDOWN_COMPLETE_BIT BIT(27) | |
206 | #define EMAC_CPPI_PASS_CRC_BIT BIT(26) | |
207 | #define EMAC_RX_BD_BUF_SIZE (0xFFFF) | |
208 | #define EMAC_BD_LENGTH_FOR_CACHE (16) /* only CPPI bytes */ | |
209 | #define EMAC_RX_BD_PKT_LENGTH_MASK (0xFFFF) | |
210 | ||
211 | /* Max hardware defines */ | |
212 | #define EMAC_MAX_TXRX_CHANNELS (8) /* Max hardware channels */ | |
213 | #define EMAC_DEF_MAX_MULTICAST_ADDRESSES (64) /* Max mcast addr's */ | |
214 | ||
215 | /* EMAC Peripheral Device Register Memory Layout structure */ | |
216 | #define EMAC_MACINVECTOR 0x90 | |
217 | ||
218 | #define EMAC_DM646X_MACEOIVECTOR 0x94 | |
219 | ||
220 | #define EMAC_MACINTSTATRAW 0xB0 | |
221 | #define EMAC_MACINTSTATMASKED 0xB4 | |
222 | #define EMAC_MACINTMASKSET 0xB8 | |
223 | #define EMAC_MACINTMASKCLEAR 0xBC | |
224 | ||
225 | #define EMAC_RXMBPENABLE 0x100 | |
226 | #define EMAC_RXUNICASTSET 0x104 | |
227 | #define EMAC_RXUNICASTCLEAR 0x108 | |
228 | #define EMAC_RXMAXLEN 0x10C | |
229 | #define EMAC_RXBUFFEROFFSET 0x110 | |
230 | #define EMAC_RXFILTERLOWTHRESH 0x114 | |
231 | ||
232 | #define EMAC_MACCONTROL 0x160 | |
233 | #define EMAC_MACSTATUS 0x164 | |
234 | #define EMAC_EMCONTROL 0x168 | |
235 | #define EMAC_FIFOCONTROL 0x16C | |
236 | #define EMAC_MACCONFIG 0x170 | |
237 | #define EMAC_SOFTRESET 0x174 | |
238 | #define EMAC_MACSRCADDRLO 0x1D0 | |
239 | #define EMAC_MACSRCADDRHI 0x1D4 | |
240 | #define EMAC_MACHASH1 0x1D8 | |
241 | #define EMAC_MACHASH2 0x1DC | |
242 | #define EMAC_MACADDRLO 0x500 | |
243 | #define EMAC_MACADDRHI 0x504 | |
244 | #define EMAC_MACINDEX 0x508 | |
245 | ||
246 | /* EMAC statistics registers */ | |
247 | #define EMAC_RXGOODFRAMES 0x200 | |
248 | #define EMAC_RXBCASTFRAMES 0x204 | |
249 | #define EMAC_RXMCASTFRAMES 0x208 | |
250 | #define EMAC_RXPAUSEFRAMES 0x20C | |
251 | #define EMAC_RXCRCERRORS 0x210 | |
252 | #define EMAC_RXALIGNCODEERRORS 0x214 | |
253 | #define EMAC_RXOVERSIZED 0x218 | |
254 | #define EMAC_RXJABBER 0x21C | |
255 | #define EMAC_RXUNDERSIZED 0x220 | |
256 | #define EMAC_RXFRAGMENTS 0x224 | |
257 | #define EMAC_RXFILTERED 0x228 | |
258 | #define EMAC_RXQOSFILTERED 0x22C | |
259 | #define EMAC_RXOCTETS 0x230 | |
260 | #define EMAC_TXGOODFRAMES 0x234 | |
261 | #define EMAC_TXBCASTFRAMES 0x238 | |
262 | #define EMAC_TXMCASTFRAMES 0x23C | |
263 | #define EMAC_TXPAUSEFRAMES 0x240 | |
264 | #define EMAC_TXDEFERRED 0x244 | |
265 | #define EMAC_TXCOLLISION 0x248 | |
266 | #define EMAC_TXSINGLECOLL 0x24C | |
267 | #define EMAC_TXMULTICOLL 0x250 | |
268 | #define EMAC_TXEXCESSIVECOLL 0x254 | |
269 | #define EMAC_TXLATECOLL 0x258 | |
270 | #define EMAC_TXUNDERRUN 0x25C | |
271 | #define EMAC_TXCARRIERSENSE 0x260 | |
272 | #define EMAC_TXOCTETS 0x264 | |
273 | #define EMAC_NETOCTETS 0x280 | |
274 | #define EMAC_RXSOFOVERRUNS 0x284 | |
275 | #define EMAC_RXMOFOVERRUNS 0x288 | |
276 | #define EMAC_RXDMAOVERRUNS 0x28C | |
277 | ||
278 | /* EMAC DM644x control registers */ | |
279 | #define EMAC_CTRL_EWCTL (0x4) | |
280 | #define EMAC_CTRL_EWINTTCNT (0x8) | |
281 | ||
282 | /* EMAC DM644x control module masks */ | |
283 | #define EMAC_DM644X_EWINTCNT_MASK 0x1FFFF | |
284 | #define EMAC_DM644X_INTMIN_INTVL 0x1 | |
285 | #define EMAC_DM644X_INTMAX_INTVL (EMAC_DM644X_EWINTCNT_MASK) | |
286 | ||
287 | /* EMAC DM646X control module registers */ | |
288 | #define EMAC_DM646X_CMINTCTRL 0x0C | |
289 | #define EMAC_DM646X_CMRXINTEN 0x14 | |
290 | #define EMAC_DM646X_CMTXINTEN 0x18 | |
291 | #define EMAC_DM646X_CMRXINTMAX 0x70 | |
292 | #define EMAC_DM646X_CMTXINTMAX 0x74 | |
293 | ||
294 | /* EMAC DM646X control module masks */ | |
295 | #define EMAC_DM646X_INTPACEEN (0x3 << 16) | |
296 | #define EMAC_DM646X_INTPRESCALE_MASK (0x7FF << 0) | |
297 | #define EMAC_DM646X_CMINTMAX_CNT 63 | |
298 | #define EMAC_DM646X_CMINTMIN_CNT 2 | |
299 | #define EMAC_DM646X_CMINTMAX_INTVL (1000 / EMAC_DM646X_CMINTMIN_CNT) | |
300 | #define EMAC_DM646X_CMINTMIN_INTVL ((1000 / EMAC_DM646X_CMINTMAX_CNT) + 1) | |
301 | ||
302 | ||
303 | /* EMAC EOI codes for C0 */ | |
304 | #define EMAC_DM646X_MAC_EOI_C0_RXEN (0x01) | |
305 | #define EMAC_DM646X_MAC_EOI_C0_TXEN (0x02) | |
306 | ||
307 | /* EMAC Stats Clear Mask */ | |
308 | #define EMAC_STATS_CLR_MASK (0xFFFFFFFF) | |
309 | ||
310 | /* emac_priv: EMAC private data structure | |
311 | * | |
312 | * EMAC adapter private data structure | |
313 | */ | |
314 | struct emac_priv { | |
315 | u32 msg_enable; | |
316 | struct net_device *ndev; | |
317 | struct platform_device *pdev; | |
318 | struct napi_struct napi; | |
319 | char mac_addr[6]; | |
320 | void __iomem *remap_addr; | |
321 | u32 emac_base_phys; | |
322 | void __iomem *emac_base; | |
323 | void __iomem *ctrl_base; | |
324 | struct cpdma_ctlr *dma; | |
325 | struct cpdma_chan *txchan; | |
326 | struct cpdma_chan *rxchan; | |
327 | u32 link; /* 1=link on, 0=link off */ | |
328 | u32 speed; /* 0=Auto Neg, 1=No PHY, 10,100, 1000 - mbps */ | |
329 | u32 duplex; /* Link duplex: 0=Half, 1=Full */ | |
330 | u32 rx_buf_size; | |
331 | u32 isr_count; | |
332 | u32 coal_intvl; | |
333 | u32 bus_freq_mhz; | |
334 | u8 rmii_en; | |
335 | u8 version; | |
336 | u32 mac_hash1; | |
337 | u32 mac_hash2; | |
338 | u32 multicast_hash_cnt[EMAC_NUM_MULTICAST_BITS]; | |
339 | u32 rx_addr_type; | |
340 | atomic_t cur_tx; | |
341 | const char *phy_id; | |
342 | struct phy_device *phydev; | |
343 | spinlock_t lock; | |
344 | /*platform specific members*/ | |
345 | void (*int_enable) (void); | |
346 | void (*int_disable) (void); | |
347 | }; | |
348 | ||
349 | /* clock frequency for EMAC */ | |
350 | static struct clk *emac_clk; | |
351 | static unsigned long emac_bus_frequency; | |
352 | ||
353 | /* EMAC TX Host Error description strings */ | |
354 | static char *emac_txhost_errcodes[16] = { | |
355 | "No error", "SOP error", "Ownership bit not set in SOP buffer", | |
356 | "Zero Next Buffer Descriptor Pointer Without EOP", | |
357 | "Zero Buffer Pointer", "Zero Buffer Length", "Packet Length Error", | |
358 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
359 | "Reserved", "Reserved", "Reserved", "Reserved" | |
360 | }; | |
361 | ||
362 | /* EMAC RX Host Error description strings */ | |
363 | static char *emac_rxhost_errcodes[16] = { | |
364 | "No error", "Reserved", "Ownership bit not set in input buffer", | |
365 | "Reserved", "Zero Buffer Pointer", "Reserved", "Reserved", | |
366 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
367 | "Reserved", "Reserved", "Reserved", "Reserved" | |
368 | }; | |
369 | ||
370 | /* Helper macros */ | |
371 | #define emac_read(reg) ioread32(priv->emac_base + (reg)) | |
372 | #define emac_write(reg, val) iowrite32(val, priv->emac_base + (reg)) | |
373 | ||
374 | #define emac_ctrl_read(reg) ioread32((priv->ctrl_base + (reg))) | |
375 | #define emac_ctrl_write(reg, val) iowrite32(val, (priv->ctrl_base + (reg))) | |
376 | ||
377 | /** | |
378 | * emac_dump_regs: Dump important EMAC registers to debug terminal | |
379 | * @priv: The DaVinci EMAC private adapter structure | |
380 | * | |
381 | * Executes ethtool set cmd & sets phy mode | |
382 | * | |
383 | */ | |
384 | static void emac_dump_regs(struct emac_priv *priv) | |
385 | { | |
386 | struct device *emac_dev = &priv->ndev->dev; | |
387 | ||
388 | /* Print important registers in EMAC */ | |
389 | dev_info(emac_dev, "EMAC Basic registers\n"); | |
390 | if (priv->version == EMAC_VERSION_1) { | |
391 | dev_info(emac_dev, "EMAC: EWCTL: %08X, EWINTTCNT: %08X\n", | |
392 | emac_ctrl_read(EMAC_CTRL_EWCTL), | |
393 | emac_ctrl_read(EMAC_CTRL_EWINTTCNT)); | |
394 | } | |
395 | dev_info(emac_dev, "EMAC: EmuControl:%08X, FifoControl: %08X\n", | |
396 | emac_read(EMAC_EMCONTROL), emac_read(EMAC_FIFOCONTROL)); | |
397 | dev_info(emac_dev, "EMAC: MBPEnable:%08X, RXUnicastSet: %08X, "\ | |
398 | "RXMaxLen=%08X\n", emac_read(EMAC_RXMBPENABLE), | |
399 | emac_read(EMAC_RXUNICASTSET), emac_read(EMAC_RXMAXLEN)); | |
400 | dev_info(emac_dev, "EMAC: MacControl:%08X, MacStatus: %08X, "\ | |
401 | "MacConfig=%08X\n", emac_read(EMAC_MACCONTROL), | |
402 | emac_read(EMAC_MACSTATUS), emac_read(EMAC_MACCONFIG)); | |
403 | dev_info(emac_dev, "EMAC Statistics\n"); | |
404 | dev_info(emac_dev, "EMAC: rx_good_frames:%d\n", | |
405 | emac_read(EMAC_RXGOODFRAMES)); | |
406 | dev_info(emac_dev, "EMAC: rx_broadcast_frames:%d\n", | |
407 | emac_read(EMAC_RXBCASTFRAMES)); | |
408 | dev_info(emac_dev, "EMAC: rx_multicast_frames:%d\n", | |
409 | emac_read(EMAC_RXMCASTFRAMES)); | |
410 | dev_info(emac_dev, "EMAC: rx_pause_frames:%d\n", | |
411 | emac_read(EMAC_RXPAUSEFRAMES)); | |
412 | dev_info(emac_dev, "EMAC: rx_crcerrors:%d\n", | |
413 | emac_read(EMAC_RXCRCERRORS)); | |
414 | dev_info(emac_dev, "EMAC: rx_align_code_errors:%d\n", | |
415 | emac_read(EMAC_RXALIGNCODEERRORS)); | |
416 | dev_info(emac_dev, "EMAC: rx_oversized_frames:%d\n", | |
417 | emac_read(EMAC_RXOVERSIZED)); | |
418 | dev_info(emac_dev, "EMAC: rx_jabber_frames:%d\n", | |
419 | emac_read(EMAC_RXJABBER)); | |
420 | dev_info(emac_dev, "EMAC: rx_undersized_frames:%d\n", | |
421 | emac_read(EMAC_RXUNDERSIZED)); | |
422 | dev_info(emac_dev, "EMAC: rx_fragments:%d\n", | |
423 | emac_read(EMAC_RXFRAGMENTS)); | |
424 | dev_info(emac_dev, "EMAC: rx_filtered_frames:%d\n", | |
425 | emac_read(EMAC_RXFILTERED)); | |
426 | dev_info(emac_dev, "EMAC: rx_qos_filtered_frames:%d\n", | |
427 | emac_read(EMAC_RXQOSFILTERED)); | |
428 | dev_info(emac_dev, "EMAC: rx_octets:%d\n", | |
429 | emac_read(EMAC_RXOCTETS)); | |
430 | dev_info(emac_dev, "EMAC: tx_goodframes:%d\n", | |
431 | emac_read(EMAC_TXGOODFRAMES)); | |
432 | dev_info(emac_dev, "EMAC: tx_bcastframes:%d\n", | |
433 | emac_read(EMAC_TXBCASTFRAMES)); | |
434 | dev_info(emac_dev, "EMAC: tx_mcastframes:%d\n", | |
435 | emac_read(EMAC_TXMCASTFRAMES)); | |
436 | dev_info(emac_dev, "EMAC: tx_pause_frames:%d\n", | |
437 | emac_read(EMAC_TXPAUSEFRAMES)); | |
438 | dev_info(emac_dev, "EMAC: tx_deferred_frames:%d\n", | |
439 | emac_read(EMAC_TXDEFERRED)); | |
440 | dev_info(emac_dev, "EMAC: tx_collision_frames:%d\n", | |
441 | emac_read(EMAC_TXCOLLISION)); | |
442 | dev_info(emac_dev, "EMAC: tx_single_coll_frames:%d\n", | |
443 | emac_read(EMAC_TXSINGLECOLL)); | |
444 | dev_info(emac_dev, "EMAC: tx_mult_coll_frames:%d\n", | |
445 | emac_read(EMAC_TXMULTICOLL)); | |
446 | dev_info(emac_dev, "EMAC: tx_excessive_collisions:%d\n", | |
447 | emac_read(EMAC_TXEXCESSIVECOLL)); | |
448 | dev_info(emac_dev, "EMAC: tx_late_collisions:%d\n", | |
449 | emac_read(EMAC_TXLATECOLL)); | |
450 | dev_info(emac_dev, "EMAC: tx_underrun:%d\n", | |
451 | emac_read(EMAC_TXUNDERRUN)); | |
452 | dev_info(emac_dev, "EMAC: tx_carrier_sense_errors:%d\n", | |
453 | emac_read(EMAC_TXCARRIERSENSE)); | |
454 | dev_info(emac_dev, "EMAC: tx_octets:%d\n", | |
455 | emac_read(EMAC_TXOCTETS)); | |
456 | dev_info(emac_dev, "EMAC: net_octets:%d\n", | |
457 | emac_read(EMAC_NETOCTETS)); | |
458 | dev_info(emac_dev, "EMAC: rx_sof_overruns:%d\n", | |
459 | emac_read(EMAC_RXSOFOVERRUNS)); | |
460 | dev_info(emac_dev, "EMAC: rx_mof_overruns:%d\n", | |
461 | emac_read(EMAC_RXMOFOVERRUNS)); | |
462 | dev_info(emac_dev, "EMAC: rx_dma_overruns:%d\n", | |
463 | emac_read(EMAC_RXDMAOVERRUNS)); | |
464 | ||
465 | cpdma_ctlr_dump(priv->dma); | |
466 | } | |
467 | ||
468 | /** | |
469 | * emac_get_drvinfo: Get EMAC driver information | |
470 | * @ndev: The DaVinci EMAC network adapter | |
471 | * @info: ethtool info structure containing name and version | |
472 | * | |
473 | * Returns EMAC driver information (name and version) | |
474 | * | |
475 | */ | |
476 | static void emac_get_drvinfo(struct net_device *ndev, | |
477 | struct ethtool_drvinfo *info) | |
478 | { | |
479 | strcpy(info->driver, emac_version_string); | |
480 | strcpy(info->version, EMAC_MODULE_VERSION); | |
481 | } | |
482 | ||
483 | /** | |
484 | * emac_get_settings: Get EMAC settings | |
485 | * @ndev: The DaVinci EMAC network adapter | |
486 | * @ecmd: ethtool command | |
487 | * | |
488 | * Executes ethool get command | |
489 | * | |
490 | */ | |
491 | static int emac_get_settings(struct net_device *ndev, | |
492 | struct ethtool_cmd *ecmd) | |
493 | { | |
494 | struct emac_priv *priv = netdev_priv(ndev); | |
495 | if (priv->phydev) | |
496 | return phy_ethtool_gset(priv->phydev, ecmd); | |
497 | else | |
498 | return -EOPNOTSUPP; | |
499 | ||
500 | } | |
501 | ||
502 | /** | |
503 | * emac_set_settings: Set EMAC settings | |
504 | * @ndev: The DaVinci EMAC network adapter | |
505 | * @ecmd: ethtool command | |
506 | * | |
507 | * Executes ethool set command | |
508 | * | |
509 | */ | |
510 | static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) | |
511 | { | |
512 | struct emac_priv *priv = netdev_priv(ndev); | |
513 | if (priv->phydev) | |
514 | return phy_ethtool_sset(priv->phydev, ecmd); | |
515 | else | |
516 | return -EOPNOTSUPP; | |
517 | ||
518 | } | |
519 | ||
520 | /** | |
521 | * emac_get_coalesce : Get interrupt coalesce settings for this device | |
522 | * @ndev : The DaVinci EMAC network adapter | |
523 | * @coal : ethtool coalesce settings structure | |
524 | * | |
525 | * Fetch the current interrupt coalesce settings | |
526 | * | |
527 | */ | |
528 | static int emac_get_coalesce(struct net_device *ndev, | |
529 | struct ethtool_coalesce *coal) | |
530 | { | |
531 | struct emac_priv *priv = netdev_priv(ndev); | |
532 | ||
533 | coal->rx_coalesce_usecs = priv->coal_intvl; | |
534 | return 0; | |
535 | ||
536 | } | |
537 | ||
538 | /** | |
539 | * emac_set_coalesce : Set interrupt coalesce settings for this device | |
540 | * @ndev : The DaVinci EMAC network adapter | |
541 | * @coal : ethtool coalesce settings structure | |
542 | * | |
543 | * Set interrupt coalesce parameters | |
544 | * | |
545 | */ | |
546 | static int emac_set_coalesce(struct net_device *ndev, | |
547 | struct ethtool_coalesce *coal) | |
548 | { | |
549 | struct emac_priv *priv = netdev_priv(ndev); | |
550 | u32 int_ctrl, num_interrupts = 0; | |
551 | u32 prescale = 0, addnl_dvdr = 1, coal_intvl = 0; | |
552 | ||
553 | if (!coal->rx_coalesce_usecs) | |
554 | return -EINVAL; | |
555 | ||
556 | coal_intvl = coal->rx_coalesce_usecs; | |
557 | ||
558 | switch (priv->version) { | |
559 | case EMAC_VERSION_2: | |
560 | int_ctrl = emac_ctrl_read(EMAC_DM646X_CMINTCTRL); | |
561 | prescale = priv->bus_freq_mhz * 4; | |
562 | ||
563 | if (coal_intvl < EMAC_DM646X_CMINTMIN_INTVL) | |
564 | coal_intvl = EMAC_DM646X_CMINTMIN_INTVL; | |
565 | ||
566 | if (coal_intvl > EMAC_DM646X_CMINTMAX_INTVL) { | |
567 | /* | |
568 | * Interrupt pacer works with 4us Pulse, we can | |
569 | * throttle further by dilating the 4us pulse. | |
570 | */ | |
571 | addnl_dvdr = EMAC_DM646X_INTPRESCALE_MASK / prescale; | |
572 | ||
573 | if (addnl_dvdr > 1) { | |
574 | prescale *= addnl_dvdr; | |
575 | if (coal_intvl > (EMAC_DM646X_CMINTMAX_INTVL | |
576 | * addnl_dvdr)) | |
577 | coal_intvl = (EMAC_DM646X_CMINTMAX_INTVL | |
578 | * addnl_dvdr); | |
579 | } else { | |
580 | addnl_dvdr = 1; | |
581 | coal_intvl = EMAC_DM646X_CMINTMAX_INTVL; | |
582 | } | |
583 | } | |
584 | ||
585 | num_interrupts = (1000 * addnl_dvdr) / coal_intvl; | |
586 | ||
587 | int_ctrl |= EMAC_DM646X_INTPACEEN; | |
588 | int_ctrl &= (~EMAC_DM646X_INTPRESCALE_MASK); | |
589 | int_ctrl |= (prescale & EMAC_DM646X_INTPRESCALE_MASK); | |
590 | emac_ctrl_write(EMAC_DM646X_CMINTCTRL, int_ctrl); | |
591 | ||
592 | emac_ctrl_write(EMAC_DM646X_CMRXINTMAX, num_interrupts); | |
593 | emac_ctrl_write(EMAC_DM646X_CMTXINTMAX, num_interrupts); | |
594 | ||
595 | break; | |
596 | default: | |
597 | int_ctrl = emac_ctrl_read(EMAC_CTRL_EWINTTCNT); | |
598 | int_ctrl &= (~EMAC_DM644X_EWINTCNT_MASK); | |
599 | prescale = coal_intvl * priv->bus_freq_mhz; | |
600 | if (prescale > EMAC_DM644X_EWINTCNT_MASK) { | |
601 | prescale = EMAC_DM644X_EWINTCNT_MASK; | |
602 | coal_intvl = prescale / priv->bus_freq_mhz; | |
603 | } | |
604 | emac_ctrl_write(EMAC_CTRL_EWINTTCNT, (int_ctrl | prescale)); | |
605 | ||
606 | break; | |
607 | } | |
608 | ||
609 | printk(KERN_INFO"Set coalesce to %d usecs.\n", coal_intvl); | |
610 | priv->coal_intvl = coal_intvl; | |
611 | ||
612 | return 0; | |
613 | ||
614 | } | |
615 | ||
616 | ||
617 | /** | |
618 | * ethtool_ops: DaVinci EMAC Ethtool structure | |
619 | * | |
620 | * Ethtool support for EMAC adapter | |
621 | * | |
622 | */ | |
623 | static const struct ethtool_ops ethtool_ops = { | |
624 | .get_drvinfo = emac_get_drvinfo, | |
625 | .get_settings = emac_get_settings, | |
626 | .set_settings = emac_set_settings, | |
627 | .get_link = ethtool_op_get_link, | |
628 | .get_coalesce = emac_get_coalesce, | |
629 | .set_coalesce = emac_set_coalesce, | |
630 | .get_ts_info = ethtool_op_get_ts_info, | |
631 | }; | |
632 | ||
633 | /** | |
634 | * emac_update_phystatus: Update Phy status | |
635 | * @priv: The DaVinci EMAC private adapter structure | |
636 | * | |
637 | * Updates phy status and takes action for network queue if required | |
638 | * based upon link status | |
639 | * | |
640 | */ | |
641 | static void emac_update_phystatus(struct emac_priv *priv) | |
642 | { | |
643 | u32 mac_control; | |
644 | u32 new_duplex; | |
645 | u32 cur_duplex; | |
646 | struct net_device *ndev = priv->ndev; | |
647 | ||
648 | mac_control = emac_read(EMAC_MACCONTROL); | |
649 | cur_duplex = (mac_control & EMAC_MACCONTROL_FULLDUPLEXEN) ? | |
650 | DUPLEX_FULL : DUPLEX_HALF; | |
651 | if (priv->phydev) | |
652 | new_duplex = priv->phydev->duplex; | |
653 | else | |
654 | new_duplex = DUPLEX_FULL; | |
655 | ||
656 | /* We get called only if link has changed (speed/duplex/status) */ | |
657 | if ((priv->link) && (new_duplex != cur_duplex)) { | |
658 | priv->duplex = new_duplex; | |
659 | if (DUPLEX_FULL == priv->duplex) | |
660 | mac_control |= (EMAC_MACCONTROL_FULLDUPLEXEN); | |
661 | else | |
662 | mac_control &= ~(EMAC_MACCONTROL_FULLDUPLEXEN); | |
663 | } | |
664 | ||
665 | if (priv->speed == SPEED_1000 && (priv->version == EMAC_VERSION_2)) { | |
666 | mac_control = emac_read(EMAC_MACCONTROL); | |
667 | mac_control |= (EMAC_DM646X_MACCONTORL_GIG | | |
668 | EMAC_DM646X_MACCONTORL_GIGFORCE); | |
669 | } else { | |
670 | /* Clear the GIG bit and GIGFORCE bit */ | |
671 | mac_control &= ~(EMAC_DM646X_MACCONTORL_GIGFORCE | | |
672 | EMAC_DM646X_MACCONTORL_GIG); | |
673 | ||
674 | if (priv->rmii_en && (priv->speed == SPEED_100)) | |
675 | mac_control |= EMAC_MACCONTROL_RMIISPEED_MASK; | |
676 | else | |
677 | mac_control &= ~EMAC_MACCONTROL_RMIISPEED_MASK; | |
678 | } | |
679 | ||
680 | /* Update mac_control if changed */ | |
681 | emac_write(EMAC_MACCONTROL, mac_control); | |
682 | ||
683 | if (priv->link) { | |
684 | /* link ON */ | |
685 | if (!netif_carrier_ok(ndev)) | |
686 | netif_carrier_on(ndev); | |
687 | /* reactivate the transmit queue if it is stopped */ | |
688 | if (netif_running(ndev) && netif_queue_stopped(ndev)) | |
689 | netif_wake_queue(ndev); | |
690 | } else { | |
691 | /* link OFF */ | |
692 | if (netif_carrier_ok(ndev)) | |
693 | netif_carrier_off(ndev); | |
694 | if (!netif_queue_stopped(ndev)) | |
695 | netif_stop_queue(ndev); | |
696 | } | |
697 | } | |
698 | ||
699 | /** | |
700 | * hash_get: Calculate hash value from mac address | |
701 | * @addr: mac address to delete from hash table | |
702 | * | |
703 | * Calculates hash value from mac address | |
704 | * | |
705 | */ | |
706 | static u32 hash_get(u8 *addr) | |
707 | { | |
708 | u32 hash; | |
709 | u8 tmpval; | |
710 | int cnt; | |
711 | hash = 0; | |
712 | ||
713 | for (cnt = 0; cnt < 2; cnt++) { | |
714 | tmpval = *addr++; | |
715 | hash ^= (tmpval >> 2) ^ (tmpval << 4); | |
716 | tmpval = *addr++; | |
717 | hash ^= (tmpval >> 4) ^ (tmpval << 2); | |
718 | tmpval = *addr++; | |
719 | hash ^= (tmpval >> 6) ^ (tmpval); | |
720 | } | |
721 | ||
722 | return hash & 0x3F; | |
723 | } | |
724 | ||
725 | /** | |
726 | * hash_add: Hash function to add mac addr from hash table | |
727 | * @priv: The DaVinci EMAC private adapter structure | |
728 | * mac_addr: mac address to delete from hash table | |
729 | * | |
730 | * Adds mac address to the internal hash table | |
731 | * | |
732 | */ | |
733 | static int hash_add(struct emac_priv *priv, u8 *mac_addr) | |
734 | { | |
735 | struct device *emac_dev = &priv->ndev->dev; | |
736 | u32 rc = 0; | |
737 | u32 hash_bit; | |
738 | u32 hash_value = hash_get(mac_addr); | |
739 | ||
740 | if (hash_value >= EMAC_NUM_MULTICAST_BITS) { | |
741 | if (netif_msg_drv(priv)) { | |
742 | dev_err(emac_dev, "DaVinci EMAC: hash_add(): Invalid "\ | |
743 | "Hash %08x, should not be greater than %08x", | |
744 | hash_value, (EMAC_NUM_MULTICAST_BITS - 1)); | |
745 | } | |
746 | return -1; | |
747 | } | |
748 | ||
749 | /* set the hash bit only if not previously set */ | |
750 | if (priv->multicast_hash_cnt[hash_value] == 0) { | |
751 | rc = 1; /* hash value changed */ | |
752 | if (hash_value < 32) { | |
753 | hash_bit = BIT(hash_value); | |
754 | priv->mac_hash1 |= hash_bit; | |
755 | } else { | |
756 | hash_bit = BIT((hash_value - 32)); | |
757 | priv->mac_hash2 |= hash_bit; | |
758 | } | |
759 | } | |
760 | ||
761 | /* incr counter for num of mcast addr's mapped to "this" hash bit */ | |
762 | ++priv->multicast_hash_cnt[hash_value]; | |
763 | ||
764 | return rc; | |
765 | } | |
766 | ||
767 | /** | |
768 | * hash_del: Hash function to delete mac addr from hash table | |
769 | * @priv: The DaVinci EMAC private adapter structure | |
770 | * mac_addr: mac address to delete from hash table | |
771 | * | |
772 | * Removes mac address from the internal hash table | |
773 | * | |
774 | */ | |
775 | static int hash_del(struct emac_priv *priv, u8 *mac_addr) | |
776 | { | |
777 | u32 hash_value; | |
778 | u32 hash_bit; | |
779 | ||
780 | hash_value = hash_get(mac_addr); | |
781 | if (priv->multicast_hash_cnt[hash_value] > 0) { | |
782 | /* dec cntr for num of mcast addr's mapped to this hash bit */ | |
783 | --priv->multicast_hash_cnt[hash_value]; | |
784 | } | |
785 | ||
786 | /* if counter still > 0, at least one multicast address refers | |
787 | * to this hash bit. so return 0 */ | |
788 | if (priv->multicast_hash_cnt[hash_value] > 0) | |
789 | return 0; | |
790 | ||
791 | if (hash_value < 32) { | |
792 | hash_bit = BIT(hash_value); | |
793 | priv->mac_hash1 &= ~hash_bit; | |
794 | } else { | |
795 | hash_bit = BIT((hash_value - 32)); | |
796 | priv->mac_hash2 &= ~hash_bit; | |
797 | } | |
798 | ||
799 | /* return 1 to indicate change in mac_hash registers reqd */ | |
800 | return 1; | |
801 | } | |
802 | ||
803 | /* EMAC multicast operation */ | |
804 | #define EMAC_MULTICAST_ADD 0 | |
805 | #define EMAC_MULTICAST_DEL 1 | |
806 | #define EMAC_ALL_MULTI_SET 2 | |
807 | #define EMAC_ALL_MULTI_CLR 3 | |
808 | ||
809 | /** | |
810 | * emac_add_mcast: Set multicast address in the EMAC adapter (Internal) | |
811 | * @priv: The DaVinci EMAC private adapter structure | |
812 | * @action: multicast operation to perform | |
813 | * mac_addr: mac address to set | |
814 | * | |
815 | * Set multicast addresses in EMAC adapter - internal function | |
816 | * | |
817 | */ | |
818 | static void emac_add_mcast(struct emac_priv *priv, u32 action, u8 *mac_addr) | |
819 | { | |
820 | struct device *emac_dev = &priv->ndev->dev; | |
821 | int update = -1; | |
822 | ||
823 | switch (action) { | |
824 | case EMAC_MULTICAST_ADD: | |
825 | update = hash_add(priv, mac_addr); | |
826 | break; | |
827 | case EMAC_MULTICAST_DEL: | |
828 | update = hash_del(priv, mac_addr); | |
829 | break; | |
830 | case EMAC_ALL_MULTI_SET: | |
831 | update = 1; | |
832 | priv->mac_hash1 = EMAC_ALL_MULTI_REG_VALUE; | |
833 | priv->mac_hash2 = EMAC_ALL_MULTI_REG_VALUE; | |
834 | break; | |
835 | case EMAC_ALL_MULTI_CLR: | |
836 | update = 1; | |
837 | priv->mac_hash1 = 0; | |
838 | priv->mac_hash2 = 0; | |
839 | memset(&(priv->multicast_hash_cnt[0]), 0, | |
840 | sizeof(priv->multicast_hash_cnt[0]) * | |
841 | EMAC_NUM_MULTICAST_BITS); | |
842 | break; | |
843 | default: | |
844 | if (netif_msg_drv(priv)) | |
845 | dev_err(emac_dev, "DaVinci EMAC: add_mcast"\ | |
846 | ": bad operation %d", action); | |
847 | break; | |
848 | } | |
849 | ||
850 | /* write to the hardware only if the register status chances */ | |
851 | if (update > 0) { | |
852 | emac_write(EMAC_MACHASH1, priv->mac_hash1); | |
853 | emac_write(EMAC_MACHASH2, priv->mac_hash2); | |
854 | } | |
855 | } | |
856 | ||
857 | /** | |
858 | * emac_dev_mcast_set: Set multicast address in the EMAC adapter | |
859 | * @ndev: The DaVinci EMAC network adapter | |
860 | * | |
861 | * Set multicast addresses in EMAC adapter | |
862 | * | |
863 | */ | |
864 | static void emac_dev_mcast_set(struct net_device *ndev) | |
865 | { | |
866 | u32 mbp_enable; | |
867 | struct emac_priv *priv = netdev_priv(ndev); | |
868 | ||
869 | mbp_enable = emac_read(EMAC_RXMBPENABLE); | |
870 | if (ndev->flags & IFF_PROMISC) { | |
871 | mbp_enable &= (~EMAC_MBP_PROMISCCH(EMAC_DEF_PROM_CH)); | |
872 | mbp_enable |= (EMAC_MBP_RXPROMISC); | |
873 | } else { | |
874 | mbp_enable = (mbp_enable & ~EMAC_MBP_RXPROMISC); | |
875 | if ((ndev->flags & IFF_ALLMULTI) || | |
876 | netdev_mc_count(ndev) > EMAC_DEF_MAX_MULTICAST_ADDRESSES) { | |
877 | mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST); | |
878 | emac_add_mcast(priv, EMAC_ALL_MULTI_SET, NULL); | |
879 | } | |
880 | if (!netdev_mc_empty(ndev)) { | |
881 | struct netdev_hw_addr *ha; | |
882 | ||
883 | mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST); | |
884 | emac_add_mcast(priv, EMAC_ALL_MULTI_CLR, NULL); | |
885 | /* program multicast address list into EMAC hardware */ | |
886 | netdev_for_each_mc_addr(ha, ndev) { | |
887 | emac_add_mcast(priv, EMAC_MULTICAST_ADD, | |
888 | (u8 *) ha->addr); | |
889 | } | |
890 | } else { | |
891 | mbp_enable = (mbp_enable & ~EMAC_MBP_RXMCAST); | |
892 | emac_add_mcast(priv, EMAC_ALL_MULTI_CLR, NULL); | |
893 | } | |
894 | } | |
895 | /* Set mbp config register */ | |
896 | emac_write(EMAC_RXMBPENABLE, mbp_enable); | |
897 | } | |
898 | ||
899 | /************************************************************************* | |
900 | * EMAC Hardware manipulation | |
901 | *************************************************************************/ | |
902 | ||
903 | /** | |
904 | * emac_int_disable: Disable EMAC module interrupt (from adapter) | |
905 | * @priv: The DaVinci EMAC private adapter structure | |
906 | * | |
907 | * Disable EMAC interrupt on the adapter | |
908 | * | |
909 | */ | |
910 | static void emac_int_disable(struct emac_priv *priv) | |
911 | { | |
912 | if (priv->version == EMAC_VERSION_2) { | |
913 | unsigned long flags; | |
914 | ||
915 | local_irq_save(flags); | |
916 | ||
917 | /* Program C0_Int_En to zero to turn off | |
918 | * interrupts to the CPU */ | |
919 | emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0x0); | |
920 | emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0x0); | |
921 | /* NOTE: Rx Threshold and Misc interrupts are not disabled */ | |
922 | if (priv->int_disable) | |
923 | priv->int_disable(); | |
924 | ||
925 | local_irq_restore(flags); | |
926 | ||
927 | } else { | |
928 | /* Set DM644x control registers for interrupt control */ | |
929 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x0); | |
930 | } | |
931 | } | |
932 | ||
933 | /** | |
934 | * emac_int_enable: Enable EMAC module interrupt (from adapter) | |
935 | * @priv: The DaVinci EMAC private adapter structure | |
936 | * | |
937 | * Enable EMAC interrupt on the adapter | |
938 | * | |
939 | */ | |
940 | static void emac_int_enable(struct emac_priv *priv) | |
941 | { | |
942 | if (priv->version == EMAC_VERSION_2) { | |
943 | if (priv->int_enable) | |
944 | priv->int_enable(); | |
945 | ||
946 | emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0xff); | |
947 | emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0xff); | |
948 | ||
949 | /* In addition to turning on interrupt Enable, we need | |
950 | * ack by writing appropriate values to the EOI | |
951 | * register */ | |
952 | ||
953 | /* NOTE: Rx Threshold and Misc interrupts are not enabled */ | |
954 | ||
955 | /* ack rxen only then a new pulse will be generated */ | |
956 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
957 | EMAC_DM646X_MAC_EOI_C0_RXEN); | |
958 | ||
959 | /* ack txen- only then a new pulse will be generated */ | |
960 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
961 | EMAC_DM646X_MAC_EOI_C0_TXEN); | |
962 | ||
963 | } else { | |
964 | /* Set DM644x control registers for interrupt control */ | |
965 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x1); | |
966 | } | |
967 | } | |
968 | ||
969 | /** | |
970 | * emac_irq: EMAC interrupt handler | |
971 | * @irq: interrupt number | |
972 | * @dev_id: EMAC network adapter data structure ptr | |
973 | * | |
974 | * EMAC Interrupt handler - we only schedule NAPI and not process any packets | |
975 | * here. EVen the interrupt status is checked (TX/RX/Err) in NAPI poll function | |
976 | * | |
977 | * Returns interrupt handled condition | |
978 | */ | |
979 | static irqreturn_t emac_irq(int irq, void *dev_id) | |
980 | { | |
981 | struct net_device *ndev = (struct net_device *)dev_id; | |
982 | struct emac_priv *priv = netdev_priv(ndev); | |
983 | ||
984 | ++priv->isr_count; | |
985 | if (likely(netif_running(priv->ndev))) { | |
986 | emac_int_disable(priv); | |
987 | napi_schedule(&priv->napi); | |
988 | } else { | |
989 | /* we are closing down, so dont process anything */ | |
990 | } | |
991 | return IRQ_HANDLED; | |
992 | } | |
993 | ||
994 | static struct sk_buff *emac_rx_alloc(struct emac_priv *priv) | |
995 | { | |
996 | struct sk_buff *skb = netdev_alloc_skb(priv->ndev, priv->rx_buf_size); | |
997 | if (WARN_ON(!skb)) | |
998 | return NULL; | |
999 | skb_reserve(skb, NET_IP_ALIGN); | |
1000 | return skb; | |
1001 | } | |
1002 | ||
1003 | static void emac_rx_handler(void *token, int len, int status) | |
1004 | { | |
1005 | struct sk_buff *skb = token; | |
1006 | struct net_device *ndev = skb->dev; | |
1007 | struct emac_priv *priv = netdev_priv(ndev); | |
1008 | struct device *emac_dev = &ndev->dev; | |
1009 | int ret; | |
1010 | ||
1011 | /* free and bail if we are shutting down */ | |
1012 | if (unlikely(!netif_running(ndev))) { | |
1013 | dev_kfree_skb_any(skb); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | /* recycle on receive error */ | |
1018 | if (status < 0) { | |
1019 | ndev->stats.rx_errors++; | |
1020 | goto recycle; | |
1021 | } | |
1022 | ||
1023 | /* feed received packet up the stack */ | |
1024 | skb_put(skb, len); | |
1025 | skb->protocol = eth_type_trans(skb, ndev); | |
1026 | netif_receive_skb(skb); | |
1027 | ndev->stats.rx_bytes += len; | |
1028 | ndev->stats.rx_packets++; | |
1029 | ||
1030 | /* alloc a new packet for receive */ | |
1031 | skb = emac_rx_alloc(priv); | |
1032 | if (!skb) { | |
1033 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
1034 | dev_err(emac_dev, "failed rx buffer alloc\n"); | |
1035 | return; | |
1036 | } | |
1037 | ||
1038 | recycle: | |
1039 | ret = cpdma_chan_submit(priv->rxchan, skb, skb->data, | |
1040 | skb_tailroom(skb), GFP_KERNEL); | |
1041 | ||
1042 | WARN_ON(ret == -ENOMEM); | |
1043 | if (unlikely(ret < 0)) | |
1044 | dev_kfree_skb_any(skb); | |
1045 | } | |
1046 | ||
1047 | static void emac_tx_handler(void *token, int len, int status) | |
1048 | { | |
1049 | struct sk_buff *skb = token; | |
1050 | struct net_device *ndev = skb->dev; | |
1051 | struct emac_priv *priv = netdev_priv(ndev); | |
1052 | ||
1053 | atomic_dec(&priv->cur_tx); | |
1054 | ||
1055 | if (unlikely(netif_queue_stopped(ndev))) | |
1056 | netif_start_queue(ndev); | |
1057 | ndev->stats.tx_packets++; | |
1058 | ndev->stats.tx_bytes += len; | |
1059 | dev_kfree_skb_any(skb); | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * emac_dev_xmit: EMAC Transmit function | |
1064 | * @skb: SKB pointer | |
1065 | * @ndev: The DaVinci EMAC network adapter | |
1066 | * | |
1067 | * Called by the system to transmit a packet - we queue the packet in | |
1068 | * EMAC hardware transmit queue | |
1069 | * | |
1070 | * Returns success(NETDEV_TX_OK) or error code (typically out of desc's) | |
1071 | */ | |
1072 | static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1073 | { | |
1074 | struct device *emac_dev = &ndev->dev; | |
1075 | int ret_code; | |
1076 | struct emac_priv *priv = netdev_priv(ndev); | |
1077 | ||
1078 | /* If no link, return */ | |
1079 | if (unlikely(!priv->link)) { | |
1080 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1081 | dev_err(emac_dev, "DaVinci EMAC: No link to transmit"); | |
1082 | goto fail_tx; | |
1083 | } | |
1084 | ||
1085 | ret_code = skb_padto(skb, EMAC_DEF_MIN_ETHPKTSIZE); | |
1086 | if (unlikely(ret_code < 0)) { | |
1087 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1088 | dev_err(emac_dev, "DaVinci EMAC: packet pad failed"); | |
1089 | goto fail_tx; | |
1090 | } | |
1091 | ||
1092 | skb_tx_timestamp(skb); | |
1093 | ||
1094 | ret_code = cpdma_chan_submit(priv->txchan, skb, skb->data, skb->len, | |
1095 | GFP_KERNEL); | |
1096 | if (unlikely(ret_code != 0)) { | |
1097 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1098 | dev_err(emac_dev, "DaVinci EMAC: desc submit failed"); | |
1099 | goto fail_tx; | |
1100 | } | |
1101 | ||
1102 | if (atomic_inc_return(&priv->cur_tx) >= EMAC_DEF_TX_NUM_DESC) | |
1103 | netif_stop_queue(ndev); | |
1104 | ||
1105 | return NETDEV_TX_OK; | |
1106 | ||
1107 | fail_tx: | |
1108 | ndev->stats.tx_dropped++; | |
1109 | netif_stop_queue(ndev); | |
1110 | return NETDEV_TX_BUSY; | |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * emac_dev_tx_timeout: EMAC Transmit timeout function | |
1115 | * @ndev: The DaVinci EMAC network adapter | |
1116 | * | |
1117 | * Called when system detects that a skb timeout period has expired | |
1118 | * potentially due to a fault in the adapter in not being able to send | |
1119 | * it out on the wire. We teardown the TX channel assuming a hardware | |
1120 | * error and re-initialize the TX channel for hardware operation | |
1121 | * | |
1122 | */ | |
1123 | static void emac_dev_tx_timeout(struct net_device *ndev) | |
1124 | { | |
1125 | struct emac_priv *priv = netdev_priv(ndev); | |
1126 | struct device *emac_dev = &ndev->dev; | |
1127 | ||
1128 | if (netif_msg_tx_err(priv)) | |
1129 | dev_err(emac_dev, "DaVinci EMAC: xmit timeout, restarting TX"); | |
1130 | ||
1131 | emac_dump_regs(priv); | |
1132 | ||
1133 | ndev->stats.tx_errors++; | |
1134 | emac_int_disable(priv); | |
1135 | cpdma_chan_stop(priv->txchan); | |
1136 | cpdma_chan_start(priv->txchan); | |
1137 | emac_int_enable(priv); | |
1138 | } | |
1139 | ||
1140 | /** | |
1141 | * emac_set_type0addr: Set EMAC Type0 mac address | |
1142 | * @priv: The DaVinci EMAC private adapter structure | |
1143 | * @ch: RX channel number | |
1144 | * @mac_addr: MAC address to set in device | |
1145 | * | |
1146 | * Called internally to set Type0 mac address of the adapter (Device) | |
1147 | * | |
1148 | * Returns success (0) or appropriate error code (none as of now) | |
1149 | */ | |
1150 | static void emac_set_type0addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1151 | { | |
1152 | u32 val; | |
1153 | val = ((mac_addr[5] << 8) | (mac_addr[4])); | |
1154 | emac_write(EMAC_MACSRCADDRLO, val); | |
1155 | ||
1156 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1157 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1158 | emac_write(EMAC_MACSRCADDRHI, val); | |
1159 | val = emac_read(EMAC_RXUNICASTSET); | |
1160 | val |= BIT(ch); | |
1161 | emac_write(EMAC_RXUNICASTSET, val); | |
1162 | val = emac_read(EMAC_RXUNICASTCLEAR); | |
1163 | val &= ~BIT(ch); | |
1164 | emac_write(EMAC_RXUNICASTCLEAR, val); | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * emac_set_type1addr: Set EMAC Type1 mac address | |
1169 | * @priv: The DaVinci EMAC private adapter structure | |
1170 | * @ch: RX channel number | |
1171 | * @mac_addr: MAC address to set in device | |
1172 | * | |
1173 | * Called internally to set Type1 mac address of the adapter (Device) | |
1174 | * | |
1175 | * Returns success (0) or appropriate error code (none as of now) | |
1176 | */ | |
1177 | static void emac_set_type1addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1178 | { | |
1179 | u32 val; | |
1180 | emac_write(EMAC_MACINDEX, ch); | |
1181 | val = ((mac_addr[5] << 8) | mac_addr[4]); | |
1182 | emac_write(EMAC_MACADDRLO, val); | |
1183 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1184 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1185 | emac_write(EMAC_MACADDRHI, val); | |
1186 | emac_set_type0addr(priv, ch, mac_addr); | |
1187 | } | |
1188 | ||
1189 | /** | |
1190 | * emac_set_type2addr: Set EMAC Type2 mac address | |
1191 | * @priv: The DaVinci EMAC private adapter structure | |
1192 | * @ch: RX channel number | |
1193 | * @mac_addr: MAC address to set in device | |
1194 | * @index: index into RX address entries | |
1195 | * @match: match parameter for RX address matching logic | |
1196 | * | |
1197 | * Called internally to set Type2 mac address of the adapter (Device) | |
1198 | * | |
1199 | * Returns success (0) or appropriate error code (none as of now) | |
1200 | */ | |
1201 | static void emac_set_type2addr(struct emac_priv *priv, u32 ch, | |
1202 | char *mac_addr, int index, int match) | |
1203 | { | |
1204 | u32 val; | |
1205 | emac_write(EMAC_MACINDEX, index); | |
1206 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1207 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1208 | emac_write(EMAC_MACADDRHI, val); | |
1209 | val = ((mac_addr[5] << 8) | mac_addr[4] | ((ch & 0x7) << 16) | \ | |
1210 | (match << 19) | BIT(20)); | |
1211 | emac_write(EMAC_MACADDRLO, val); | |
1212 | emac_set_type0addr(priv, ch, mac_addr); | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * emac_setmac: Set mac address in the adapter (internal function) | |
1217 | * @priv: The DaVinci EMAC private adapter structure | |
1218 | * @ch: RX channel number | |
1219 | * @mac_addr: MAC address to set in device | |
1220 | * | |
1221 | * Called internally to set the mac address of the adapter (Device) | |
1222 | * | |
1223 | * Returns success (0) or appropriate error code (none as of now) | |
1224 | */ | |
1225 | static void emac_setmac(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1226 | { | |
1227 | struct device *emac_dev = &priv->ndev->dev; | |
1228 | ||
1229 | if (priv->rx_addr_type == 0) { | |
1230 | emac_set_type0addr(priv, ch, mac_addr); | |
1231 | } else if (priv->rx_addr_type == 1) { | |
1232 | u32 cnt; | |
1233 | for (cnt = 0; cnt < EMAC_MAX_TXRX_CHANNELS; cnt++) | |
1234 | emac_set_type1addr(priv, ch, mac_addr); | |
1235 | } else if (priv->rx_addr_type == 2) { | |
1236 | emac_set_type2addr(priv, ch, mac_addr, ch, 1); | |
1237 | emac_set_type0addr(priv, ch, mac_addr); | |
1238 | } else { | |
1239 | if (netif_msg_drv(priv)) | |
1240 | dev_err(emac_dev, "DaVinci EMAC: Wrong addressing\n"); | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * emac_dev_setmac_addr: Set mac address in the adapter | |
1246 | * @ndev: The DaVinci EMAC network adapter | |
1247 | * @addr: MAC address to set in device | |
1248 | * | |
1249 | * Called by the system to set the mac address of the adapter (Device) | |
1250 | * | |
1251 | * Returns success (0) or appropriate error code (none as of now) | |
1252 | */ | |
1253 | static int emac_dev_setmac_addr(struct net_device *ndev, void *addr) | |
1254 | { | |
1255 | struct emac_priv *priv = netdev_priv(ndev); | |
1256 | struct device *emac_dev = &priv->ndev->dev; | |
1257 | struct sockaddr *sa = addr; | |
1258 | ||
1259 | if (!is_valid_ether_addr(sa->sa_data)) | |
1260 | return -EADDRNOTAVAIL; | |
1261 | ||
1262 | /* Store mac addr in priv and rx channel and set it in EMAC hw */ | |
1263 | memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len); | |
1264 | memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len); | |
1265 | ndev->addr_assign_type &= ~NET_ADDR_RANDOM; | |
1266 | ||
1267 | /* MAC address is configured only after the interface is enabled. */ | |
1268 | if (netif_running(ndev)) { | |
1269 | emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr); | |
1270 | } | |
1271 | ||
1272 | if (netif_msg_drv(priv)) | |
1273 | dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %pM\n", | |
1274 | priv->mac_addr); | |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * emac_hw_enable: Enable EMAC hardware for packet transmission/reception | |
1281 | * @priv: The DaVinci EMAC private adapter structure | |
1282 | * | |
1283 | * Enables EMAC hardware for packet processing - enables PHY, enables RX | |
1284 | * for packet reception and enables device interrupts and then NAPI | |
1285 | * | |
1286 | * Returns success (0) or appropriate error code (none right now) | |
1287 | */ | |
1288 | static int emac_hw_enable(struct emac_priv *priv) | |
1289 | { | |
1290 | u32 val, mbp_enable, mac_control; | |
1291 | ||
1292 | /* Soft reset */ | |
1293 | emac_write(EMAC_SOFTRESET, 1); | |
1294 | while (emac_read(EMAC_SOFTRESET)) | |
1295 | cpu_relax(); | |
1296 | ||
1297 | /* Disable interrupt & Set pacing for more interrupts initially */ | |
1298 | emac_int_disable(priv); | |
1299 | ||
1300 | /* Full duplex enable bit set when auto negotiation happens */ | |
1301 | mac_control = | |
1302 | (((EMAC_DEF_TXPRIO_FIXED) ? (EMAC_MACCONTROL_TXPTYPE) : 0x0) | | |
1303 | ((priv->speed == 1000) ? EMAC_MACCONTROL_GIGABITEN : 0x0) | | |
1304 | ((EMAC_DEF_TXPACING_EN) ? (EMAC_MACCONTROL_TXPACEEN) : 0x0) | | |
1305 | ((priv->duplex == DUPLEX_FULL) ? 0x1 : 0)); | |
1306 | emac_write(EMAC_MACCONTROL, mac_control); | |
1307 | ||
1308 | mbp_enable = | |
1309 | (((EMAC_DEF_PASS_CRC) ? (EMAC_RXMBP_PASSCRC_MASK) : 0x0) | | |
1310 | ((EMAC_DEF_QOS_EN) ? (EMAC_RXMBP_QOSEN_MASK) : 0x0) | | |
1311 | ((EMAC_DEF_NO_BUFF_CHAIN) ? (EMAC_RXMBP_NOCHAIN_MASK) : 0x0) | | |
1312 | ((EMAC_DEF_MACCTRL_FRAME_EN) ? (EMAC_RXMBP_CMFEN_MASK) : 0x0) | | |
1313 | ((EMAC_DEF_SHORT_FRAME_EN) ? (EMAC_RXMBP_CSFEN_MASK) : 0x0) | | |
1314 | ((EMAC_DEF_ERROR_FRAME_EN) ? (EMAC_RXMBP_CEFEN_MASK) : 0x0) | | |
1315 | ((EMAC_DEF_PROM_EN) ? (EMAC_RXMBP_CAFEN_MASK) : 0x0) | | |
1316 | ((EMAC_DEF_PROM_CH & EMAC_RXMBP_CHMASK) << \ | |
1317 | EMAC_RXMBP_PROMCH_SHIFT) | | |
1318 | ((EMAC_DEF_BCAST_EN) ? (EMAC_RXMBP_BROADEN_MASK) : 0x0) | | |
1319 | ((EMAC_DEF_BCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
1320 | EMAC_RXMBP_BROADCH_SHIFT) | | |
1321 | ((EMAC_DEF_MCAST_EN) ? (EMAC_RXMBP_MULTIEN_MASK) : 0x0) | | |
1322 | ((EMAC_DEF_MCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
1323 | EMAC_RXMBP_MULTICH_SHIFT)); | |
1324 | emac_write(EMAC_RXMBPENABLE, mbp_enable); | |
1325 | emac_write(EMAC_RXMAXLEN, (EMAC_DEF_MAX_FRAME_SIZE & | |
1326 | EMAC_RX_MAX_LEN_MASK)); | |
1327 | emac_write(EMAC_RXBUFFEROFFSET, (EMAC_DEF_BUFFER_OFFSET & | |
1328 | EMAC_RX_BUFFER_OFFSET_MASK)); | |
1329 | emac_write(EMAC_RXFILTERLOWTHRESH, 0); | |
1330 | emac_write(EMAC_RXUNICASTCLEAR, EMAC_RX_UNICAST_CLEAR_ALL); | |
1331 | priv->rx_addr_type = (emac_read(EMAC_MACCONFIG) >> 8) & 0xFF; | |
1332 | ||
1333 | emac_write(EMAC_MACINTMASKSET, EMAC_MAC_HOST_ERR_INTMASK_VAL); | |
1334 | ||
1335 | emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr); | |
1336 | ||
1337 | /* Enable MII */ | |
1338 | val = emac_read(EMAC_MACCONTROL); | |
1339 | val |= (EMAC_MACCONTROL_GMIIEN); | |
1340 | emac_write(EMAC_MACCONTROL, val); | |
1341 | ||
1342 | /* Enable NAPI and interrupts */ | |
1343 | napi_enable(&priv->napi); | |
1344 | emac_int_enable(priv); | |
1345 | return 0; | |
1346 | ||
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * emac_poll: EMAC NAPI Poll function | |
1351 | * @ndev: The DaVinci EMAC network adapter | |
1352 | * @budget: Number of receive packets to process (as told by NAPI layer) | |
1353 | * | |
1354 | * NAPI Poll function implemented to process packets as per budget. We check | |
1355 | * the type of interrupt on the device and accordingly call the TX or RX | |
1356 | * packet processing functions. We follow the budget for RX processing and | |
1357 | * also put a cap on number of TX pkts processed through config param. The | |
1358 | * NAPI schedule function is called if more packets pending. | |
1359 | * | |
1360 | * Returns number of packets received (in most cases; else TX pkts - rarely) | |
1361 | */ | |
1362 | static int emac_poll(struct napi_struct *napi, int budget) | |
1363 | { | |
1364 | unsigned int mask; | |
1365 | struct emac_priv *priv = container_of(napi, struct emac_priv, napi); | |
1366 | struct net_device *ndev = priv->ndev; | |
1367 | struct device *emac_dev = &ndev->dev; | |
1368 | u32 status = 0; | |
1369 | u32 num_tx_pkts = 0, num_rx_pkts = 0; | |
1370 | ||
1371 | /* Check interrupt vectors and call packet processing */ | |
1372 | status = emac_read(EMAC_MACINVECTOR); | |
1373 | ||
1374 | mask = EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC; | |
1375 | ||
1376 | if (priv->version == EMAC_VERSION_2) | |
1377 | mask = EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC; | |
1378 | ||
1379 | if (status & mask) { | |
1380 | num_tx_pkts = cpdma_chan_process(priv->txchan, | |
1381 | EMAC_DEF_TX_MAX_SERVICE); | |
1382 | } /* TX processing */ | |
1383 | ||
1384 | mask = EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC; | |
1385 | ||
1386 | if (priv->version == EMAC_VERSION_2) | |
1387 | mask = EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC; | |
1388 | ||
1389 | if (status & mask) { | |
1390 | num_rx_pkts = cpdma_chan_process(priv->rxchan, budget); | |
1391 | } /* RX processing */ | |
1392 | ||
1393 | mask = EMAC_DM644X_MAC_IN_VECTOR_HOST_INT; | |
1394 | if (priv->version == EMAC_VERSION_2) | |
1395 | mask = EMAC_DM646X_MAC_IN_VECTOR_HOST_INT; | |
1396 | ||
1397 | if (unlikely(status & mask)) { | |
1398 | u32 ch, cause; | |
1399 | dev_err(emac_dev, "DaVinci EMAC: Fatal Hardware Error\n"); | |
1400 | netif_stop_queue(ndev); | |
1401 | napi_disable(&priv->napi); | |
1402 | ||
1403 | status = emac_read(EMAC_MACSTATUS); | |
1404 | cause = ((status & EMAC_MACSTATUS_TXERRCODE_MASK) >> | |
1405 | EMAC_MACSTATUS_TXERRCODE_SHIFT); | |
1406 | if (cause) { | |
1407 | ch = ((status & EMAC_MACSTATUS_TXERRCH_MASK) >> | |
1408 | EMAC_MACSTATUS_TXERRCH_SHIFT); | |
1409 | if (net_ratelimit()) { | |
1410 | dev_err(emac_dev, "TX Host error %s on ch=%d\n", | |
1411 | &emac_txhost_errcodes[cause][0], ch); | |
1412 | } | |
1413 | } | |
1414 | cause = ((status & EMAC_MACSTATUS_RXERRCODE_MASK) >> | |
1415 | EMAC_MACSTATUS_RXERRCODE_SHIFT); | |
1416 | if (cause) { | |
1417 | ch = ((status & EMAC_MACSTATUS_RXERRCH_MASK) >> | |
1418 | EMAC_MACSTATUS_RXERRCH_SHIFT); | |
1419 | if (netif_msg_hw(priv) && net_ratelimit()) | |
1420 | dev_err(emac_dev, "RX Host error %s on ch=%d\n", | |
1421 | &emac_rxhost_errcodes[cause][0], ch); | |
1422 | } | |
1423 | } else if (num_rx_pkts < budget) { | |
1424 | napi_complete(napi); | |
1425 | emac_int_enable(priv); | |
1426 | } | |
1427 | ||
1428 | return num_rx_pkts; | |
1429 | } | |
1430 | ||
1431 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1432 | /** | |
1433 | * emac_poll_controller: EMAC Poll controller function | |
1434 | * @ndev: The DaVinci EMAC network adapter | |
1435 | * | |
1436 | * Polled functionality used by netconsole and others in non interrupt mode | |
1437 | * | |
1438 | */ | |
1439 | void emac_poll_controller(struct net_device *ndev) | |
1440 | { | |
1441 | struct emac_priv *priv = netdev_priv(ndev); | |
1442 | ||
1443 | emac_int_disable(priv); | |
1444 | emac_irq(ndev->irq, ndev); | |
1445 | emac_int_enable(priv); | |
1446 | } | |
1447 | #endif | |
1448 | ||
1449 | static void emac_adjust_link(struct net_device *ndev) | |
1450 | { | |
1451 | struct emac_priv *priv = netdev_priv(ndev); | |
1452 | struct phy_device *phydev = priv->phydev; | |
1453 | unsigned long flags; | |
1454 | int new_state = 0; | |
1455 | ||
1456 | spin_lock_irqsave(&priv->lock, flags); | |
1457 | ||
1458 | if (phydev->link) { | |
1459 | /* check the mode of operation - full/half duplex */ | |
1460 | if (phydev->duplex != priv->duplex) { | |
1461 | new_state = 1; | |
1462 | priv->duplex = phydev->duplex; | |
1463 | } | |
1464 | if (phydev->speed != priv->speed) { | |
1465 | new_state = 1; | |
1466 | priv->speed = phydev->speed; | |
1467 | } | |
1468 | if (!priv->link) { | |
1469 | new_state = 1; | |
1470 | priv->link = 1; | |
1471 | } | |
1472 | ||
1473 | } else if (priv->link) { | |
1474 | new_state = 1; | |
1475 | priv->link = 0; | |
1476 | priv->speed = 0; | |
1477 | priv->duplex = ~0; | |
1478 | } | |
1479 | if (new_state) { | |
1480 | emac_update_phystatus(priv); | |
1481 | phy_print_status(priv->phydev); | |
1482 | } | |
1483 | ||
1484 | spin_unlock_irqrestore(&priv->lock, flags); | |
1485 | } | |
1486 | ||
1487 | /************************************************************************* | |
1488 | * Linux Driver Model | |
1489 | *************************************************************************/ | |
1490 | ||
1491 | /** | |
1492 | * emac_devioctl: EMAC adapter ioctl | |
1493 | * @ndev: The DaVinci EMAC network adapter | |
1494 | * @ifrq: request parameter | |
1495 | * @cmd: command parameter | |
1496 | * | |
1497 | * EMAC driver ioctl function | |
1498 | * | |
1499 | * Returns success(0) or appropriate error code | |
1500 | */ | |
1501 | static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd) | |
1502 | { | |
1503 | struct emac_priv *priv = netdev_priv(ndev); | |
1504 | ||
1505 | if (!(netif_running(ndev))) | |
1506 | return -EINVAL; | |
1507 | ||
1508 | /* TODO: Add phy read and write and private statistics get feature */ | |
1509 | ||
1510 | return phy_mii_ioctl(priv->phydev, ifrq, cmd); | |
1511 | } | |
1512 | ||
1513 | static int match_first_device(struct device *dev, void *data) | |
1514 | { | |
1515 | return !strncmp(dev_name(dev), "davinci_mdio", 12); | |
1516 | } | |
1517 | ||
1518 | /** | |
1519 | * emac_dev_open: EMAC device open | |
1520 | * @ndev: The DaVinci EMAC network adapter | |
1521 | * | |
1522 | * Called when system wants to start the interface. We init TX/RX channels | |
1523 | * and enable the hardware for packet reception/transmission and start the | |
1524 | * network queue. | |
1525 | * | |
1526 | * Returns 0 for a successful open, or appropriate error code | |
1527 | */ | |
1528 | static int emac_dev_open(struct net_device *ndev) | |
1529 | { | |
1530 | struct device *emac_dev = &ndev->dev; | |
1531 | u32 cnt; | |
1532 | struct resource *res; | |
1533 | int q, m, ret; | |
1534 | int i = 0; | |
1535 | int k = 0; | |
1536 | struct emac_priv *priv = netdev_priv(ndev); | |
1537 | ||
1538 | netif_carrier_off(ndev); | |
1539 | for (cnt = 0; cnt < ETH_ALEN; cnt++) | |
1540 | ndev->dev_addr[cnt] = priv->mac_addr[cnt]; | |
1541 | ||
1542 | /* Configuration items */ | |
1543 | priv->rx_buf_size = EMAC_DEF_MAX_FRAME_SIZE + NET_IP_ALIGN; | |
1544 | ||
1545 | priv->mac_hash1 = 0; | |
1546 | priv->mac_hash2 = 0; | |
1547 | emac_write(EMAC_MACHASH1, 0); | |
1548 | emac_write(EMAC_MACHASH2, 0); | |
1549 | ||
1550 | for (i = 0; i < EMAC_DEF_RX_NUM_DESC; i++) { | |
1551 | struct sk_buff *skb = emac_rx_alloc(priv); | |
1552 | ||
1553 | if (!skb) | |
1554 | break; | |
1555 | ||
1556 | ret = cpdma_chan_submit(priv->rxchan, skb, skb->data, | |
1557 | skb_tailroom(skb), GFP_KERNEL); | |
1558 | if (WARN_ON(ret < 0)) | |
1559 | break; | |
1560 | } | |
1561 | ||
1562 | /* Request IRQ */ | |
1563 | ||
1564 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) { | |
1565 | for (i = res->start; i <= res->end; i++) { | |
1566 | if (request_irq(i, emac_irq, IRQF_DISABLED, | |
1567 | ndev->name, ndev)) | |
1568 | goto rollback; | |
1569 | } | |
1570 | k++; | |
1571 | } | |
1572 | ||
1573 | /* Start/Enable EMAC hardware */ | |
1574 | emac_hw_enable(priv); | |
1575 | ||
1576 | /* Enable Interrupt pacing if configured */ | |
1577 | if (priv->coal_intvl != 0) { | |
1578 | struct ethtool_coalesce coal; | |
1579 | ||
1580 | coal.rx_coalesce_usecs = (priv->coal_intvl << 4); | |
1581 | emac_set_coalesce(ndev, &coal); | |
1582 | } | |
1583 | ||
1584 | cpdma_ctlr_start(priv->dma); | |
1585 | ||
1586 | priv->phydev = NULL; | |
1587 | /* use the first phy on the bus if pdata did not give us a phy id */ | |
1588 | if (!priv->phy_id) { | |
1589 | struct device *phy; | |
1590 | ||
1591 | phy = bus_find_device(&mdio_bus_type, NULL, NULL, | |
1592 | match_first_device); | |
1593 | if (phy) | |
1594 | priv->phy_id = dev_name(phy); | |
1595 | } | |
1596 | ||
1597 | if (priv->phy_id && *priv->phy_id) { | |
1598 | priv->phydev = phy_connect(ndev, priv->phy_id, | |
1599 | &emac_adjust_link, 0, | |
1600 | PHY_INTERFACE_MODE_MII); | |
1601 | ||
1602 | if (IS_ERR(priv->phydev)) { | |
1603 | dev_err(emac_dev, "could not connect to phy %s\n", | |
1604 | priv->phy_id); | |
1605 | ret = PTR_ERR(priv->phydev); | |
1606 | priv->phydev = NULL; | |
1607 | return ret; | |
1608 | } | |
1609 | ||
1610 | priv->link = 0; | |
1611 | priv->speed = 0; | |
1612 | priv->duplex = ~0; | |
1613 | ||
1614 | dev_info(emac_dev, "attached PHY driver [%s] " | |
1615 | "(mii_bus:phy_addr=%s, id=%x)\n", | |
1616 | priv->phydev->drv->name, dev_name(&priv->phydev->dev), | |
1617 | priv->phydev->phy_id); | |
1618 | } else { | |
1619 | /* No PHY , fix the link, speed and duplex settings */ | |
1620 | dev_notice(emac_dev, "no phy, defaulting to 100/full\n"); | |
1621 | priv->link = 1; | |
1622 | priv->speed = SPEED_100; | |
1623 | priv->duplex = DUPLEX_FULL; | |
1624 | emac_update_phystatus(priv); | |
1625 | } | |
1626 | ||
1627 | if (!netif_running(ndev)) /* debug only - to avoid compiler warning */ | |
1628 | emac_dump_regs(priv); | |
1629 | ||
1630 | if (netif_msg_drv(priv)) | |
1631 | dev_notice(emac_dev, "DaVinci EMAC: Opened %s\n", ndev->name); | |
1632 | ||
1633 | if (priv->phydev) | |
1634 | phy_start(priv->phydev); | |
1635 | ||
1636 | return 0; | |
1637 | ||
1638 | rollback: | |
1639 | ||
1640 | dev_err(emac_dev, "DaVinci EMAC: request_irq() failed"); | |
1641 | ||
1642 | for (q = k; k >= 0; k--) { | |
1643 | for (m = i; m >= res->start; m--) | |
1644 | free_irq(m, ndev); | |
1645 | res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k-1); | |
1646 | m = res->end; | |
1647 | } | |
1648 | return -EBUSY; | |
1649 | } | |
1650 | ||
1651 | /** | |
1652 | * emac_dev_stop: EMAC device stop | |
1653 | * @ndev: The DaVinci EMAC network adapter | |
1654 | * | |
1655 | * Called when system wants to stop or down the interface. We stop the network | |
1656 | * queue, disable interrupts and cleanup TX/RX channels. | |
1657 | * | |
1658 | * We return the statistics in net_device_stats structure pulled from emac | |
1659 | */ | |
1660 | static int emac_dev_stop(struct net_device *ndev) | |
1661 | { | |
1662 | struct resource *res; | |
1663 | int i = 0; | |
1664 | int irq_num; | |
1665 | struct emac_priv *priv = netdev_priv(ndev); | |
1666 | struct device *emac_dev = &ndev->dev; | |
1667 | ||
1668 | /* inform the upper layers. */ | |
1669 | netif_stop_queue(ndev); | |
1670 | napi_disable(&priv->napi); | |
1671 | ||
1672 | netif_carrier_off(ndev); | |
1673 | emac_int_disable(priv); | |
1674 | cpdma_ctlr_stop(priv->dma); | |
1675 | emac_write(EMAC_SOFTRESET, 1); | |
1676 | ||
1677 | if (priv->phydev) | |
1678 | phy_disconnect(priv->phydev); | |
1679 | ||
1680 | /* Free IRQ */ | |
1681 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, i))) { | |
1682 | for (irq_num = res->start; irq_num <= res->end; irq_num++) | |
1683 | free_irq(irq_num, priv->ndev); | |
1684 | i++; | |
1685 | } | |
1686 | ||
1687 | if (netif_msg_drv(priv)) | |
1688 | dev_notice(emac_dev, "DaVinci EMAC: %s stopped\n", ndev->name); | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | /** | |
1694 | * emac_dev_getnetstats: EMAC get statistics function | |
1695 | * @ndev: The DaVinci EMAC network adapter | |
1696 | * | |
1697 | * Called when system wants to get statistics from the device. | |
1698 | * | |
1699 | * We return the statistics in net_device_stats structure pulled from emac | |
1700 | */ | |
1701 | static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev) | |
1702 | { | |
1703 | struct emac_priv *priv = netdev_priv(ndev); | |
1704 | u32 mac_control; | |
1705 | u32 stats_clear_mask; | |
1706 | ||
1707 | /* update emac hardware stats and reset the registers*/ | |
1708 | ||
1709 | mac_control = emac_read(EMAC_MACCONTROL); | |
1710 | ||
1711 | if (mac_control & EMAC_MACCONTROL_GMIIEN) | |
1712 | stats_clear_mask = EMAC_STATS_CLR_MASK; | |
1713 | else | |
1714 | stats_clear_mask = 0; | |
1715 | ||
1716 | ndev->stats.multicast += emac_read(EMAC_RXMCASTFRAMES); | |
1717 | emac_write(EMAC_RXMCASTFRAMES, stats_clear_mask); | |
1718 | ||
1719 | ndev->stats.collisions += (emac_read(EMAC_TXCOLLISION) + | |
1720 | emac_read(EMAC_TXSINGLECOLL) + | |
1721 | emac_read(EMAC_TXMULTICOLL)); | |
1722 | emac_write(EMAC_TXCOLLISION, stats_clear_mask); | |
1723 | emac_write(EMAC_TXSINGLECOLL, stats_clear_mask); | |
1724 | emac_write(EMAC_TXMULTICOLL, stats_clear_mask); | |
1725 | ||
1726 | ndev->stats.rx_length_errors += (emac_read(EMAC_RXOVERSIZED) + | |
1727 | emac_read(EMAC_RXJABBER) + | |
1728 | emac_read(EMAC_RXUNDERSIZED)); | |
1729 | emac_write(EMAC_RXOVERSIZED, stats_clear_mask); | |
1730 | emac_write(EMAC_RXJABBER, stats_clear_mask); | |
1731 | emac_write(EMAC_RXUNDERSIZED, stats_clear_mask); | |
1732 | ||
1733 | ndev->stats.rx_over_errors += (emac_read(EMAC_RXSOFOVERRUNS) + | |
1734 | emac_read(EMAC_RXMOFOVERRUNS)); | |
1735 | emac_write(EMAC_RXSOFOVERRUNS, stats_clear_mask); | |
1736 | emac_write(EMAC_RXMOFOVERRUNS, stats_clear_mask); | |
1737 | ||
1738 | ndev->stats.rx_fifo_errors += emac_read(EMAC_RXDMAOVERRUNS); | |
1739 | emac_write(EMAC_RXDMAOVERRUNS, stats_clear_mask); | |
1740 | ||
1741 | ndev->stats.tx_carrier_errors += | |
1742 | emac_read(EMAC_TXCARRIERSENSE); | |
1743 | emac_write(EMAC_TXCARRIERSENSE, stats_clear_mask); | |
1744 | ||
1745 | ndev->stats.tx_fifo_errors += emac_read(EMAC_TXUNDERRUN); | |
1746 | emac_write(EMAC_TXUNDERRUN, stats_clear_mask); | |
1747 | ||
1748 | return &ndev->stats; | |
1749 | } | |
1750 | ||
1751 | static const struct net_device_ops emac_netdev_ops = { | |
1752 | .ndo_open = emac_dev_open, | |
1753 | .ndo_stop = emac_dev_stop, | |
1754 | .ndo_start_xmit = emac_dev_xmit, | |
1755 | .ndo_set_rx_mode = emac_dev_mcast_set, | |
1756 | .ndo_set_mac_address = emac_dev_setmac_addr, | |
1757 | .ndo_do_ioctl = emac_devioctl, | |
1758 | .ndo_tx_timeout = emac_dev_tx_timeout, | |
1759 | .ndo_get_stats = emac_dev_getnetstats, | |
1760 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1761 | .ndo_poll_controller = emac_poll_controller, | |
1762 | #endif | |
1763 | }; | |
1764 | ||
1765 | /** | |
1766 | * davinci_emac_probe: EMAC device probe | |
1767 | * @pdev: The DaVinci EMAC device that we are removing | |
1768 | * | |
1769 | * Called when probing for emac devicesr. We get details of instances and | |
1770 | * resource information from platform init and register a network device | |
1771 | * and allocate resources necessary for driver to perform | |
1772 | */ | |
1773 | static int __devinit davinci_emac_probe(struct platform_device *pdev) | |
1774 | { | |
1775 | int rc = 0; | |
1776 | struct resource *res; | |
1777 | struct net_device *ndev; | |
1778 | struct emac_priv *priv; | |
1779 | unsigned long size, hw_ram_addr; | |
1780 | struct emac_platform_data *pdata; | |
1781 | struct device *emac_dev; | |
1782 | struct cpdma_params dma_params; | |
1783 | ||
1784 | /* obtain emac clock from kernel */ | |
1785 | emac_clk = clk_get(&pdev->dev, NULL); | |
1786 | if (IS_ERR(emac_clk)) { | |
1787 | dev_err(&pdev->dev, "failed to get EMAC clock\n"); | |
1788 | return -EBUSY; | |
1789 | } | |
1790 | emac_bus_frequency = clk_get_rate(emac_clk); | |
1791 | /* TODO: Probe PHY here if possible */ | |
1792 | ||
1793 | ndev = alloc_etherdev(sizeof(struct emac_priv)); | |
1794 | if (!ndev) { | |
1795 | rc = -ENOMEM; | |
1796 | goto free_clk; | |
1797 | } | |
1798 | ||
1799 | platform_set_drvdata(pdev, ndev); | |
1800 | priv = netdev_priv(ndev); | |
1801 | priv->pdev = pdev; | |
1802 | priv->ndev = ndev; | |
1803 | priv->msg_enable = netif_msg_init(debug_level, DAVINCI_EMAC_DEBUG); | |
1804 | ||
1805 | spin_lock_init(&priv->lock); | |
1806 | ||
1807 | pdata = pdev->dev.platform_data; | |
1808 | if (!pdata) { | |
1809 | dev_err(&pdev->dev, "no platform data\n"); | |
1810 | rc = -ENODEV; | |
1811 | goto probe_quit; | |
1812 | } | |
1813 | ||
1814 | /* MAC addr and PHY mask , RMII enable info from platform_data */ | |
1815 | memcpy(priv->mac_addr, pdata->mac_addr, 6); | |
1816 | priv->phy_id = pdata->phy_id; | |
1817 | priv->rmii_en = pdata->rmii_en; | |
1818 | priv->version = pdata->version; | |
1819 | priv->int_enable = pdata->interrupt_enable; | |
1820 | priv->int_disable = pdata->interrupt_disable; | |
1821 | ||
1822 | priv->coal_intvl = 0; | |
1823 | priv->bus_freq_mhz = (u32)(emac_bus_frequency / 1000000); | |
1824 | ||
1825 | emac_dev = &ndev->dev; | |
1826 | /* Get EMAC platform data */ | |
1827 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1828 | if (!res) { | |
1829 | dev_err(&pdev->dev,"error getting res\n"); | |
1830 | rc = -ENOENT; | |
1831 | goto probe_quit; | |
1832 | } | |
1833 | ||
1834 | priv->emac_base_phys = res->start + pdata->ctrl_reg_offset; | |
1835 | size = resource_size(res); | |
1836 | if (!request_mem_region(res->start, size, ndev->name)) { | |
1837 | dev_err(&pdev->dev, "failed request_mem_region() for regs\n"); | |
1838 | rc = -ENXIO; | |
1839 | goto probe_quit; | |
1840 | } | |
1841 | ||
1842 | priv->remap_addr = ioremap(res->start, size); | |
1843 | if (!priv->remap_addr) { | |
1844 | dev_err(&pdev->dev, "unable to map IO\n"); | |
1845 | rc = -ENOMEM; | |
1846 | release_mem_region(res->start, size); | |
1847 | goto probe_quit; | |
1848 | } | |
1849 | priv->emac_base = priv->remap_addr + pdata->ctrl_reg_offset; | |
1850 | ndev->base_addr = (unsigned long)priv->remap_addr; | |
1851 | ||
1852 | priv->ctrl_base = priv->remap_addr + pdata->ctrl_mod_reg_offset; | |
1853 | ||
1854 | hw_ram_addr = pdata->hw_ram_addr; | |
1855 | if (!hw_ram_addr) | |
1856 | hw_ram_addr = (u32 __force)res->start + pdata->ctrl_ram_offset; | |
1857 | ||
1858 | memset(&dma_params, 0, sizeof(dma_params)); | |
1859 | dma_params.dev = emac_dev; | |
1860 | dma_params.dmaregs = priv->emac_base; | |
1861 | dma_params.rxthresh = priv->emac_base + 0x120; | |
1862 | dma_params.rxfree = priv->emac_base + 0x140; | |
1863 | dma_params.txhdp = priv->emac_base + 0x600; | |
1864 | dma_params.rxhdp = priv->emac_base + 0x620; | |
1865 | dma_params.txcp = priv->emac_base + 0x640; | |
1866 | dma_params.rxcp = priv->emac_base + 0x660; | |
1867 | dma_params.num_chan = EMAC_MAX_TXRX_CHANNELS; | |
1868 | dma_params.min_packet_size = EMAC_DEF_MIN_ETHPKTSIZE; | |
1869 | dma_params.desc_hw_addr = hw_ram_addr; | |
1870 | dma_params.desc_mem_size = pdata->ctrl_ram_size; | |
1871 | dma_params.desc_align = 16; | |
1872 | ||
1873 | dma_params.desc_mem_phys = pdata->no_bd_ram ? 0 : | |
1874 | (u32 __force)res->start + pdata->ctrl_ram_offset; | |
1875 | ||
1876 | priv->dma = cpdma_ctlr_create(&dma_params); | |
1877 | if (!priv->dma) { | |
1878 | dev_err(&pdev->dev, "error initializing DMA\n"); | |
1879 | rc = -ENOMEM; | |
1880 | goto no_dma; | |
1881 | } | |
1882 | ||
1883 | priv->txchan = cpdma_chan_create(priv->dma, tx_chan_num(EMAC_DEF_TX_CH), | |
1884 | emac_tx_handler); | |
1885 | priv->rxchan = cpdma_chan_create(priv->dma, rx_chan_num(EMAC_DEF_RX_CH), | |
1886 | emac_rx_handler); | |
1887 | if (WARN_ON(!priv->txchan || !priv->rxchan)) { | |
1888 | rc = -ENOMEM; | |
1889 | goto no_irq_res; | |
1890 | } | |
1891 | ||
1892 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1893 | if (!res) { | |
1894 | dev_err(&pdev->dev, "error getting irq res\n"); | |
1895 | rc = -ENOENT; | |
1896 | goto no_irq_res; | |
1897 | } | |
1898 | ndev->irq = res->start; | |
1899 | ||
1900 | if (!is_valid_ether_addr(priv->mac_addr)) { | |
1901 | /* Use random MAC if none passed */ | |
1902 | eth_hw_addr_random(ndev); | |
1903 | memcpy(priv->mac_addr, ndev->dev_addr, ndev->addr_len); | |
1904 | dev_warn(&pdev->dev, "using random MAC addr: %pM\n", | |
1905 | priv->mac_addr); | |
1906 | } | |
1907 | ||
1908 | ndev->netdev_ops = &emac_netdev_ops; | |
1909 | SET_ETHTOOL_OPS(ndev, ðtool_ops); | |
1910 | netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT); | |
1911 | ||
1912 | clk_enable(emac_clk); | |
1913 | ||
1914 | /* register the network device */ | |
1915 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1916 | rc = register_netdev(ndev); | |
1917 | if (rc) { | |
1918 | dev_err(&pdev->dev, "error in register_netdev\n"); | |
1919 | rc = -ENODEV; | |
1920 | goto netdev_reg_err; | |
1921 | } | |
1922 | ||
1923 | ||
1924 | if (netif_msg_probe(priv)) { | |
1925 | dev_notice(emac_dev, "DaVinci EMAC Probe found device "\ | |
1926 | "(regs: %p, irq: %d)\n", | |
1927 | (void *)priv->emac_base_phys, ndev->irq); | |
1928 | } | |
1929 | return 0; | |
1930 | ||
1931 | netdev_reg_err: | |
1932 | clk_disable(emac_clk); | |
1933 | no_irq_res: | |
1934 | if (priv->txchan) | |
1935 | cpdma_chan_destroy(priv->txchan); | |
1936 | if (priv->rxchan) | |
1937 | cpdma_chan_destroy(priv->rxchan); | |
1938 | cpdma_ctlr_destroy(priv->dma); | |
1939 | no_dma: | |
1940 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1941 | release_mem_region(res->start, resource_size(res)); | |
1942 | iounmap(priv->remap_addr); | |
1943 | ||
1944 | probe_quit: | |
1945 | free_netdev(ndev); | |
1946 | free_clk: | |
1947 | clk_put(emac_clk); | |
1948 | return rc; | |
1949 | } | |
1950 | ||
1951 | /** | |
1952 | * davinci_emac_remove: EMAC device remove | |
1953 | * @pdev: The DaVinci EMAC device that we are removing | |
1954 | * | |
1955 | * Called when removing the device driver. We disable clock usage and release | |
1956 | * the resources taken up by the driver and unregister network device | |
1957 | */ | |
1958 | static int __devexit davinci_emac_remove(struct platform_device *pdev) | |
1959 | { | |
1960 | struct resource *res; | |
1961 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1962 | struct emac_priv *priv = netdev_priv(ndev); | |
1963 | ||
1964 | dev_notice(&ndev->dev, "DaVinci EMAC: davinci_emac_remove()\n"); | |
1965 | ||
1966 | platform_set_drvdata(pdev, NULL); | |
1967 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1968 | ||
1969 | if (priv->txchan) | |
1970 | cpdma_chan_destroy(priv->txchan); | |
1971 | if (priv->rxchan) | |
1972 | cpdma_chan_destroy(priv->rxchan); | |
1973 | cpdma_ctlr_destroy(priv->dma); | |
1974 | ||
1975 | release_mem_region(res->start, resource_size(res)); | |
1976 | ||
1977 | unregister_netdev(ndev); | |
1978 | iounmap(priv->remap_addr); | |
1979 | free_netdev(ndev); | |
1980 | ||
1981 | clk_disable(emac_clk); | |
1982 | clk_put(emac_clk); | |
1983 | ||
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | static int davinci_emac_suspend(struct device *dev) | |
1988 | { | |
1989 | struct platform_device *pdev = to_platform_device(dev); | |
1990 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1991 | ||
1992 | if (netif_running(ndev)) | |
1993 | emac_dev_stop(ndev); | |
1994 | ||
1995 | clk_disable(emac_clk); | |
1996 | ||
1997 | return 0; | |
1998 | } | |
1999 | ||
2000 | static int davinci_emac_resume(struct device *dev) | |
2001 | { | |
2002 | struct platform_device *pdev = to_platform_device(dev); | |
2003 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2004 | ||
2005 | clk_enable(emac_clk); | |
2006 | ||
2007 | if (netif_running(ndev)) | |
2008 | emac_dev_open(ndev); | |
2009 | ||
2010 | return 0; | |
2011 | } | |
2012 | ||
2013 | static const struct dev_pm_ops davinci_emac_pm_ops = { | |
2014 | .suspend = davinci_emac_suspend, | |
2015 | .resume = davinci_emac_resume, | |
2016 | }; | |
2017 | ||
2018 | /** | |
2019 | * davinci_emac_driver: EMAC platform driver structure | |
2020 | */ | |
2021 | static struct platform_driver davinci_emac_driver = { | |
2022 | .driver = { | |
2023 | .name = "davinci_emac", | |
2024 | .owner = THIS_MODULE, | |
2025 | .pm = &davinci_emac_pm_ops, | |
2026 | }, | |
2027 | .probe = davinci_emac_probe, | |
2028 | .remove = __devexit_p(davinci_emac_remove), | |
2029 | }; | |
2030 | ||
2031 | /** | |
2032 | * davinci_emac_init: EMAC driver module init | |
2033 | * | |
2034 | * Called when initializing the driver. We register the driver with | |
2035 | * the platform. | |
2036 | */ | |
2037 | static int __init davinci_emac_init(void) | |
2038 | { | |
2039 | return platform_driver_register(&davinci_emac_driver); | |
2040 | } | |
2041 | late_initcall(davinci_emac_init); | |
2042 | ||
2043 | /** | |
2044 | * davinci_emac_exit: EMAC driver module exit | |
2045 | * | |
2046 | * Called when exiting the driver completely. We unregister the driver with | |
2047 | * the platform and exit | |
2048 | */ | |
2049 | static void __exit davinci_emac_exit(void) | |
2050 | { | |
2051 | platform_driver_unregister(&davinci_emac_driver); | |
2052 | } | |
2053 | module_exit(davinci_emac_exit); | |
2054 | ||
2055 | MODULE_LICENSE("GPL"); | |
2056 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Anant Gole <anantgole@ti.com>"); | |
2057 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Chaithrika U S <chaithrika@ti.com>"); | |
2058 | MODULE_DESCRIPTION("DaVinci EMAC Ethernet driver"); |