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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/pm_runtime.h> | |
61 | #include <linux/davinci_emac.h> | |
62 | #include <linux/of.h> | |
63 | #include <linux/of_address.h> | |
64 | #include <linux/of_device.h> | |
65 | #include <linux/of_irq.h> | |
66 | #include <linux/of_net.h> | |
67 | ||
68 | #include <asm/irq.h> | |
69 | #include <asm/page.h> | |
70 | ||
71 | #include "davinci_cpdma.h" | |
72 | ||
73 | static int debug_level; | |
74 | module_param(debug_level, int, 0); | |
75 | MODULE_PARM_DESC(debug_level, "DaVinci EMAC debug level (NETIF_MSG bits)"); | |
76 | ||
77 | /* Netif debug messages possible */ | |
78 | #define DAVINCI_EMAC_DEBUG (NETIF_MSG_DRV | \ | |
79 | NETIF_MSG_PROBE | \ | |
80 | NETIF_MSG_LINK | \ | |
81 | NETIF_MSG_TIMER | \ | |
82 | NETIF_MSG_IFDOWN | \ | |
83 | NETIF_MSG_IFUP | \ | |
84 | NETIF_MSG_RX_ERR | \ | |
85 | NETIF_MSG_TX_ERR | \ | |
86 | NETIF_MSG_TX_QUEUED | \ | |
87 | NETIF_MSG_INTR | \ | |
88 | NETIF_MSG_TX_DONE | \ | |
89 | NETIF_MSG_RX_STATUS | \ | |
90 | NETIF_MSG_PKTDATA | \ | |
91 | NETIF_MSG_HW | \ | |
92 | NETIF_MSG_WOL) | |
93 | ||
94 | /* version info */ | |
95 | #define EMAC_MAJOR_VERSION 6 | |
96 | #define EMAC_MINOR_VERSION 1 | |
97 | #define EMAC_MODULE_VERSION "6.1" | |
98 | MODULE_VERSION(EMAC_MODULE_VERSION); | |
99 | static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1"; | |
100 | ||
101 | /* Configuration items */ | |
102 | #define EMAC_DEF_PASS_CRC (0) /* Do not pass CRC up to frames */ | |
103 | #define EMAC_DEF_QOS_EN (0) /* EMAC proprietary QoS disabled */ | |
104 | #define EMAC_DEF_NO_BUFF_CHAIN (0) /* No buffer chain */ | |
105 | #define EMAC_DEF_MACCTRL_FRAME_EN (0) /* Discard Maccontrol frames */ | |
106 | #define EMAC_DEF_SHORT_FRAME_EN (0) /* Discard short frames */ | |
107 | #define EMAC_DEF_ERROR_FRAME_EN (0) /* Discard error frames */ | |
108 | #define EMAC_DEF_PROM_EN (0) /* Promiscuous disabled */ | |
109 | #define EMAC_DEF_PROM_CH (0) /* Promiscuous channel is 0 */ | |
110 | #define EMAC_DEF_BCAST_EN (1) /* Broadcast enabled */ | |
111 | #define EMAC_DEF_BCAST_CH (0) /* Broadcast channel is 0 */ | |
112 | #define EMAC_DEF_MCAST_EN (1) /* Multicast enabled */ | |
113 | #define EMAC_DEF_MCAST_CH (0) /* Multicast channel is 0 */ | |
114 | ||
115 | #define EMAC_DEF_TXPRIO_FIXED (1) /* TX Priority is fixed */ | |
116 | #define EMAC_DEF_TXPACING_EN (0) /* TX pacing NOT supported*/ | |
117 | ||
118 | #define EMAC_DEF_BUFFER_OFFSET (0) /* Buffer offset to DMA (future) */ | |
119 | #define EMAC_DEF_MIN_ETHPKTSIZE (60) /* Minimum ethernet pkt size */ | |
120 | #define EMAC_DEF_MAX_FRAME_SIZE (1500 + 14 + 4 + 4) | |
121 | #define EMAC_DEF_TX_CH (0) /* Default 0th channel */ | |
122 | #define EMAC_DEF_RX_CH (0) /* Default 0th channel */ | |
123 | #define EMAC_DEF_RX_NUM_DESC (128) | |
124 | #define EMAC_DEF_MAX_TX_CH (1) /* Max TX channels configured */ | |
125 | #define EMAC_DEF_MAX_RX_CH (1) /* Max RX channels configured */ | |
126 | #define EMAC_POLL_WEIGHT (64) /* Default NAPI poll weight */ | |
127 | ||
128 | /* Buffer descriptor parameters */ | |
129 | #define EMAC_DEF_TX_MAX_SERVICE (32) /* TX max service BD's */ | |
130 | #define EMAC_DEF_RX_MAX_SERVICE (64) /* should = netdev->weight */ | |
131 | ||
132 | /* EMAC register related defines */ | |
133 | #define EMAC_ALL_MULTI_REG_VALUE (0xFFFFFFFF) | |
134 | #define EMAC_NUM_MULTICAST_BITS (64) | |
135 | #define EMAC_TX_CONTROL_TX_ENABLE_VAL (0x1) | |
136 | #define EMAC_RX_CONTROL_RX_ENABLE_VAL (0x1) | |
137 | #define EMAC_MAC_HOST_ERR_INTMASK_VAL (0x2) | |
138 | #define EMAC_RX_UNICAST_CLEAR_ALL (0xFF) | |
139 | #define EMAC_INT_MASK_CLEAR (0xFF) | |
140 | ||
141 | /* RX MBP register bit positions */ | |
142 | #define EMAC_RXMBP_PASSCRC_MASK BIT(30) | |
143 | #define EMAC_RXMBP_QOSEN_MASK BIT(29) | |
144 | #define EMAC_RXMBP_NOCHAIN_MASK BIT(28) | |
145 | #define EMAC_RXMBP_CMFEN_MASK BIT(24) | |
146 | #define EMAC_RXMBP_CSFEN_MASK BIT(23) | |
147 | #define EMAC_RXMBP_CEFEN_MASK BIT(22) | |
148 | #define EMAC_RXMBP_CAFEN_MASK BIT(21) | |
149 | #define EMAC_RXMBP_PROMCH_SHIFT (16) | |
150 | #define EMAC_RXMBP_PROMCH_MASK (0x7 << 16) | |
151 | #define EMAC_RXMBP_BROADEN_MASK BIT(13) | |
152 | #define EMAC_RXMBP_BROADCH_SHIFT (8) | |
153 | #define EMAC_RXMBP_BROADCH_MASK (0x7 << 8) | |
154 | #define EMAC_RXMBP_MULTIEN_MASK BIT(5) | |
155 | #define EMAC_RXMBP_MULTICH_SHIFT (0) | |
156 | #define EMAC_RXMBP_MULTICH_MASK (0x7) | |
157 | #define EMAC_RXMBP_CHMASK (0x7) | |
158 | ||
159 | /* EMAC register definitions/bit maps used */ | |
160 | # define EMAC_MBP_RXPROMISC (0x00200000) | |
161 | # define EMAC_MBP_PROMISCCH(ch) (((ch) & 0x7) << 16) | |
162 | # define EMAC_MBP_RXBCAST (0x00002000) | |
163 | # define EMAC_MBP_BCASTCHAN(ch) (((ch) & 0x7) << 8) | |
164 | # define EMAC_MBP_RXMCAST (0x00000020) | |
165 | # define EMAC_MBP_MCASTCHAN(ch) ((ch) & 0x7) | |
166 | ||
167 | /* EMAC mac_control register */ | |
168 | #define EMAC_MACCONTROL_TXPTYPE BIT(9) | |
169 | #define EMAC_MACCONTROL_TXPACEEN BIT(6) | |
170 | #define EMAC_MACCONTROL_GMIIEN BIT(5) | |
171 | #define EMAC_MACCONTROL_GIGABITEN BIT(7) | |
172 | #define EMAC_MACCONTROL_FULLDUPLEXEN BIT(0) | |
173 | #define EMAC_MACCONTROL_RMIISPEED_MASK BIT(15) | |
174 | ||
175 | /* GIGABIT MODE related bits */ | |
176 | #define EMAC_DM646X_MACCONTORL_GIG BIT(7) | |
177 | #define EMAC_DM646X_MACCONTORL_GIGFORCE BIT(17) | |
178 | ||
179 | /* EMAC mac_status register */ | |
180 | #define EMAC_MACSTATUS_TXERRCODE_MASK (0xF00000) | |
181 | #define EMAC_MACSTATUS_TXERRCODE_SHIFT (20) | |
182 | #define EMAC_MACSTATUS_TXERRCH_MASK (0x7) | |
183 | #define EMAC_MACSTATUS_TXERRCH_SHIFT (16) | |
184 | #define EMAC_MACSTATUS_RXERRCODE_MASK (0xF000) | |
185 | #define EMAC_MACSTATUS_RXERRCODE_SHIFT (12) | |
186 | #define EMAC_MACSTATUS_RXERRCH_MASK (0x7) | |
187 | #define EMAC_MACSTATUS_RXERRCH_SHIFT (8) | |
188 | ||
189 | /* EMAC RX register masks */ | |
190 | #define EMAC_RX_MAX_LEN_MASK (0xFFFF) | |
191 | #define EMAC_RX_BUFFER_OFFSET_MASK (0xFFFF) | |
192 | ||
193 | /* MAC_IN_VECTOR (0x180) register bit fields */ | |
194 | #define EMAC_DM644X_MAC_IN_VECTOR_HOST_INT BIT(17) | |
195 | #define EMAC_DM644X_MAC_IN_VECTOR_STATPEND_INT BIT(16) | |
196 | #define EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC BIT(8) | |
197 | #define EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC BIT(0) | |
198 | ||
199 | /** NOTE:: For DM646x the IN_VECTOR has changed */ | |
200 | #define EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC BIT(EMAC_DEF_RX_CH) | |
201 | #define EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC BIT(16 + EMAC_DEF_TX_CH) | |
202 | #define EMAC_DM646X_MAC_IN_VECTOR_HOST_INT BIT(26) | |
203 | #define EMAC_DM646X_MAC_IN_VECTOR_STATPEND_INT BIT(27) | |
204 | ||
205 | /* CPPI bit positions */ | |
206 | #define EMAC_CPPI_SOP_BIT BIT(31) | |
207 | #define EMAC_CPPI_EOP_BIT BIT(30) | |
208 | #define EMAC_CPPI_OWNERSHIP_BIT BIT(29) | |
209 | #define EMAC_CPPI_EOQ_BIT BIT(28) | |
210 | #define EMAC_CPPI_TEARDOWN_COMPLETE_BIT BIT(27) | |
211 | #define EMAC_CPPI_PASS_CRC_BIT BIT(26) | |
212 | #define EMAC_RX_BD_BUF_SIZE (0xFFFF) | |
213 | #define EMAC_BD_LENGTH_FOR_CACHE (16) /* only CPPI bytes */ | |
214 | #define EMAC_RX_BD_PKT_LENGTH_MASK (0xFFFF) | |
215 | ||
216 | /* Max hardware defines */ | |
217 | #define EMAC_MAX_TXRX_CHANNELS (8) /* Max hardware channels */ | |
218 | #define EMAC_DEF_MAX_MULTICAST_ADDRESSES (64) /* Max mcast addr's */ | |
219 | ||
220 | /* EMAC Peripheral Device Register Memory Layout structure */ | |
221 | #define EMAC_MACINVECTOR 0x90 | |
222 | ||
223 | #define EMAC_DM646X_MACEOIVECTOR 0x94 | |
224 | ||
225 | #define EMAC_MACINTSTATRAW 0xB0 | |
226 | #define EMAC_MACINTSTATMASKED 0xB4 | |
227 | #define EMAC_MACINTMASKSET 0xB8 | |
228 | #define EMAC_MACINTMASKCLEAR 0xBC | |
229 | ||
230 | #define EMAC_RXMBPENABLE 0x100 | |
231 | #define EMAC_RXUNICASTSET 0x104 | |
232 | #define EMAC_RXUNICASTCLEAR 0x108 | |
233 | #define EMAC_RXMAXLEN 0x10C | |
234 | #define EMAC_RXBUFFEROFFSET 0x110 | |
235 | #define EMAC_RXFILTERLOWTHRESH 0x114 | |
236 | ||
237 | #define EMAC_MACCONTROL 0x160 | |
238 | #define EMAC_MACSTATUS 0x164 | |
239 | #define EMAC_EMCONTROL 0x168 | |
240 | #define EMAC_FIFOCONTROL 0x16C | |
241 | #define EMAC_MACCONFIG 0x170 | |
242 | #define EMAC_SOFTRESET 0x174 | |
243 | #define EMAC_MACSRCADDRLO 0x1D0 | |
244 | #define EMAC_MACSRCADDRHI 0x1D4 | |
245 | #define EMAC_MACHASH1 0x1D8 | |
246 | #define EMAC_MACHASH2 0x1DC | |
247 | #define EMAC_MACADDRLO 0x500 | |
248 | #define EMAC_MACADDRHI 0x504 | |
249 | #define EMAC_MACINDEX 0x508 | |
250 | ||
251 | /* EMAC statistics registers */ | |
252 | #define EMAC_RXGOODFRAMES 0x200 | |
253 | #define EMAC_RXBCASTFRAMES 0x204 | |
254 | #define EMAC_RXMCASTFRAMES 0x208 | |
255 | #define EMAC_RXPAUSEFRAMES 0x20C | |
256 | #define EMAC_RXCRCERRORS 0x210 | |
257 | #define EMAC_RXALIGNCODEERRORS 0x214 | |
258 | #define EMAC_RXOVERSIZED 0x218 | |
259 | #define EMAC_RXJABBER 0x21C | |
260 | #define EMAC_RXUNDERSIZED 0x220 | |
261 | #define EMAC_RXFRAGMENTS 0x224 | |
262 | #define EMAC_RXFILTERED 0x228 | |
263 | #define EMAC_RXQOSFILTERED 0x22C | |
264 | #define EMAC_RXOCTETS 0x230 | |
265 | #define EMAC_TXGOODFRAMES 0x234 | |
266 | #define EMAC_TXBCASTFRAMES 0x238 | |
267 | #define EMAC_TXMCASTFRAMES 0x23C | |
268 | #define EMAC_TXPAUSEFRAMES 0x240 | |
269 | #define EMAC_TXDEFERRED 0x244 | |
270 | #define EMAC_TXCOLLISION 0x248 | |
271 | #define EMAC_TXSINGLECOLL 0x24C | |
272 | #define EMAC_TXMULTICOLL 0x250 | |
273 | #define EMAC_TXEXCESSIVECOLL 0x254 | |
274 | #define EMAC_TXLATECOLL 0x258 | |
275 | #define EMAC_TXUNDERRUN 0x25C | |
276 | #define EMAC_TXCARRIERSENSE 0x260 | |
277 | #define EMAC_TXOCTETS 0x264 | |
278 | #define EMAC_NETOCTETS 0x280 | |
279 | #define EMAC_RXSOFOVERRUNS 0x284 | |
280 | #define EMAC_RXMOFOVERRUNS 0x288 | |
281 | #define EMAC_RXDMAOVERRUNS 0x28C | |
282 | ||
283 | /* EMAC DM644x control registers */ | |
284 | #define EMAC_CTRL_EWCTL (0x4) | |
285 | #define EMAC_CTRL_EWINTTCNT (0x8) | |
286 | ||
287 | /* EMAC DM644x control module masks */ | |
288 | #define EMAC_DM644X_EWINTCNT_MASK 0x1FFFF | |
289 | #define EMAC_DM644X_INTMIN_INTVL 0x1 | |
290 | #define EMAC_DM644X_INTMAX_INTVL (EMAC_DM644X_EWINTCNT_MASK) | |
291 | ||
292 | /* EMAC DM646X control module registers */ | |
293 | #define EMAC_DM646X_CMINTCTRL 0x0C | |
294 | #define EMAC_DM646X_CMRXINTEN 0x14 | |
295 | #define EMAC_DM646X_CMTXINTEN 0x18 | |
296 | #define EMAC_DM646X_CMRXINTMAX 0x70 | |
297 | #define EMAC_DM646X_CMTXINTMAX 0x74 | |
298 | ||
299 | /* EMAC DM646X control module masks */ | |
300 | #define EMAC_DM646X_INTPACEEN (0x3 << 16) | |
301 | #define EMAC_DM646X_INTPRESCALE_MASK (0x7FF << 0) | |
302 | #define EMAC_DM646X_CMINTMAX_CNT 63 | |
303 | #define EMAC_DM646X_CMINTMIN_CNT 2 | |
304 | #define EMAC_DM646X_CMINTMAX_INTVL (1000 / EMAC_DM646X_CMINTMIN_CNT) | |
305 | #define EMAC_DM646X_CMINTMIN_INTVL ((1000 / EMAC_DM646X_CMINTMAX_CNT) + 1) | |
306 | ||
307 | ||
308 | /* EMAC EOI codes for C0 */ | |
309 | #define EMAC_DM646X_MAC_EOI_C0_RXEN (0x01) | |
310 | #define EMAC_DM646X_MAC_EOI_C0_TXEN (0x02) | |
311 | ||
312 | /* EMAC Stats Clear Mask */ | |
313 | #define EMAC_STATS_CLR_MASK (0xFFFFFFFF) | |
314 | ||
315 | /* emac_priv: EMAC private data structure | |
316 | * | |
317 | * EMAC adapter private data structure | |
318 | */ | |
319 | struct emac_priv { | |
320 | u32 msg_enable; | |
321 | struct net_device *ndev; | |
322 | struct platform_device *pdev; | |
323 | struct napi_struct napi; | |
324 | char mac_addr[6]; | |
325 | void __iomem *remap_addr; | |
326 | u32 emac_base_phys; | |
327 | void __iomem *emac_base; | |
328 | void __iomem *ctrl_base; | |
329 | struct cpdma_ctlr *dma; | |
330 | struct cpdma_chan *txchan; | |
331 | struct cpdma_chan *rxchan; | |
332 | u32 link; /* 1=link on, 0=link off */ | |
333 | u32 speed; /* 0=Auto Neg, 1=No PHY, 10,100, 1000 - mbps */ | |
334 | u32 duplex; /* Link duplex: 0=Half, 1=Full */ | |
335 | u32 rx_buf_size; | |
336 | u32 isr_count; | |
337 | u32 coal_intvl; | |
338 | u32 bus_freq_mhz; | |
339 | u8 rmii_en; | |
340 | u8 version; | |
341 | u32 mac_hash1; | |
342 | u32 mac_hash2; | |
343 | u32 multicast_hash_cnt[EMAC_NUM_MULTICAST_BITS]; | |
344 | u32 rx_addr_type; | |
345 | const char *phy_id; | |
346 | #ifdef CONFIG_OF | |
347 | struct device_node *phy_node; | |
348 | #endif | |
349 | struct phy_device *phydev; | |
350 | spinlock_t lock; | |
351 | /*platform specific members*/ | |
352 | void (*int_enable) (void); | |
353 | void (*int_disable) (void); | |
354 | }; | |
355 | ||
356 | /* EMAC TX Host Error description strings */ | |
357 | static char *emac_txhost_errcodes[16] = { | |
358 | "No error", "SOP error", "Ownership bit not set in SOP buffer", | |
359 | "Zero Next Buffer Descriptor Pointer Without EOP", | |
360 | "Zero Buffer Pointer", "Zero Buffer Length", "Packet Length Error", | |
361 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
362 | "Reserved", "Reserved", "Reserved", "Reserved" | |
363 | }; | |
364 | ||
365 | /* EMAC RX Host Error description strings */ | |
366 | static char *emac_rxhost_errcodes[16] = { | |
367 | "No error", "Reserved", "Ownership bit not set in input buffer", | |
368 | "Reserved", "Zero Buffer Pointer", "Reserved", "Reserved", | |
369 | "Reserved", "Reserved", "Reserved", "Reserved", "Reserved", | |
370 | "Reserved", "Reserved", "Reserved", "Reserved" | |
371 | }; | |
372 | ||
373 | /* Helper macros */ | |
374 | #define emac_read(reg) ioread32(priv->emac_base + (reg)) | |
375 | #define emac_write(reg, val) iowrite32(val, priv->emac_base + (reg)) | |
376 | ||
377 | #define emac_ctrl_read(reg) ioread32((priv->ctrl_base + (reg))) | |
378 | #define emac_ctrl_write(reg, val) iowrite32(val, (priv->ctrl_base + (reg))) | |
379 | ||
380 | /** | |
381 | * emac_dump_regs - Dump important EMAC registers to debug terminal | |
382 | * @priv: The DaVinci EMAC private adapter structure | |
383 | * | |
384 | * Executes ethtool set cmd & sets phy mode | |
385 | * | |
386 | */ | |
387 | static void emac_dump_regs(struct emac_priv *priv) | |
388 | { | |
389 | struct device *emac_dev = &priv->ndev->dev; | |
390 | ||
391 | /* Print important registers in EMAC */ | |
392 | dev_info(emac_dev, "EMAC Basic registers\n"); | |
393 | if (priv->version == EMAC_VERSION_1) { | |
394 | dev_info(emac_dev, "EMAC: EWCTL: %08X, EWINTTCNT: %08X\n", | |
395 | emac_ctrl_read(EMAC_CTRL_EWCTL), | |
396 | emac_ctrl_read(EMAC_CTRL_EWINTTCNT)); | |
397 | } | |
398 | dev_info(emac_dev, "EMAC: EmuControl:%08X, FifoControl: %08X\n", | |
399 | emac_read(EMAC_EMCONTROL), emac_read(EMAC_FIFOCONTROL)); | |
400 | dev_info(emac_dev, "EMAC: MBPEnable:%08X, RXUnicastSet: %08X, "\ | |
401 | "RXMaxLen=%08X\n", emac_read(EMAC_RXMBPENABLE), | |
402 | emac_read(EMAC_RXUNICASTSET), emac_read(EMAC_RXMAXLEN)); | |
403 | dev_info(emac_dev, "EMAC: MacControl:%08X, MacStatus: %08X, "\ | |
404 | "MacConfig=%08X\n", emac_read(EMAC_MACCONTROL), | |
405 | emac_read(EMAC_MACSTATUS), emac_read(EMAC_MACCONFIG)); | |
406 | dev_info(emac_dev, "EMAC Statistics\n"); | |
407 | dev_info(emac_dev, "EMAC: rx_good_frames:%d\n", | |
408 | emac_read(EMAC_RXGOODFRAMES)); | |
409 | dev_info(emac_dev, "EMAC: rx_broadcast_frames:%d\n", | |
410 | emac_read(EMAC_RXBCASTFRAMES)); | |
411 | dev_info(emac_dev, "EMAC: rx_multicast_frames:%d\n", | |
412 | emac_read(EMAC_RXMCASTFRAMES)); | |
413 | dev_info(emac_dev, "EMAC: rx_pause_frames:%d\n", | |
414 | emac_read(EMAC_RXPAUSEFRAMES)); | |
415 | dev_info(emac_dev, "EMAC: rx_crcerrors:%d\n", | |
416 | emac_read(EMAC_RXCRCERRORS)); | |
417 | dev_info(emac_dev, "EMAC: rx_align_code_errors:%d\n", | |
418 | emac_read(EMAC_RXALIGNCODEERRORS)); | |
419 | dev_info(emac_dev, "EMAC: rx_oversized_frames:%d\n", | |
420 | emac_read(EMAC_RXOVERSIZED)); | |
421 | dev_info(emac_dev, "EMAC: rx_jabber_frames:%d\n", | |
422 | emac_read(EMAC_RXJABBER)); | |
423 | dev_info(emac_dev, "EMAC: rx_undersized_frames:%d\n", | |
424 | emac_read(EMAC_RXUNDERSIZED)); | |
425 | dev_info(emac_dev, "EMAC: rx_fragments:%d\n", | |
426 | emac_read(EMAC_RXFRAGMENTS)); | |
427 | dev_info(emac_dev, "EMAC: rx_filtered_frames:%d\n", | |
428 | emac_read(EMAC_RXFILTERED)); | |
429 | dev_info(emac_dev, "EMAC: rx_qos_filtered_frames:%d\n", | |
430 | emac_read(EMAC_RXQOSFILTERED)); | |
431 | dev_info(emac_dev, "EMAC: rx_octets:%d\n", | |
432 | emac_read(EMAC_RXOCTETS)); | |
433 | dev_info(emac_dev, "EMAC: tx_goodframes:%d\n", | |
434 | emac_read(EMAC_TXGOODFRAMES)); | |
435 | dev_info(emac_dev, "EMAC: tx_bcastframes:%d\n", | |
436 | emac_read(EMAC_TXBCASTFRAMES)); | |
437 | dev_info(emac_dev, "EMAC: tx_mcastframes:%d\n", | |
438 | emac_read(EMAC_TXMCASTFRAMES)); | |
439 | dev_info(emac_dev, "EMAC: tx_pause_frames:%d\n", | |
440 | emac_read(EMAC_TXPAUSEFRAMES)); | |
441 | dev_info(emac_dev, "EMAC: tx_deferred_frames:%d\n", | |
442 | emac_read(EMAC_TXDEFERRED)); | |
443 | dev_info(emac_dev, "EMAC: tx_collision_frames:%d\n", | |
444 | emac_read(EMAC_TXCOLLISION)); | |
445 | dev_info(emac_dev, "EMAC: tx_single_coll_frames:%d\n", | |
446 | emac_read(EMAC_TXSINGLECOLL)); | |
447 | dev_info(emac_dev, "EMAC: tx_mult_coll_frames:%d\n", | |
448 | emac_read(EMAC_TXMULTICOLL)); | |
449 | dev_info(emac_dev, "EMAC: tx_excessive_collisions:%d\n", | |
450 | emac_read(EMAC_TXEXCESSIVECOLL)); | |
451 | dev_info(emac_dev, "EMAC: tx_late_collisions:%d\n", | |
452 | emac_read(EMAC_TXLATECOLL)); | |
453 | dev_info(emac_dev, "EMAC: tx_underrun:%d\n", | |
454 | emac_read(EMAC_TXUNDERRUN)); | |
455 | dev_info(emac_dev, "EMAC: tx_carrier_sense_errors:%d\n", | |
456 | emac_read(EMAC_TXCARRIERSENSE)); | |
457 | dev_info(emac_dev, "EMAC: tx_octets:%d\n", | |
458 | emac_read(EMAC_TXOCTETS)); | |
459 | dev_info(emac_dev, "EMAC: net_octets:%d\n", | |
460 | emac_read(EMAC_NETOCTETS)); | |
461 | dev_info(emac_dev, "EMAC: rx_sof_overruns:%d\n", | |
462 | emac_read(EMAC_RXSOFOVERRUNS)); | |
463 | dev_info(emac_dev, "EMAC: rx_mof_overruns:%d\n", | |
464 | emac_read(EMAC_RXMOFOVERRUNS)); | |
465 | dev_info(emac_dev, "EMAC: rx_dma_overruns:%d\n", | |
466 | emac_read(EMAC_RXDMAOVERRUNS)); | |
467 | ||
468 | cpdma_ctlr_dump(priv->dma); | |
469 | } | |
470 | ||
471 | /** | |
472 | * emac_get_drvinfo - Get EMAC driver information | |
473 | * @ndev: The DaVinci EMAC network adapter | |
474 | * @info: ethtool info structure containing name and version | |
475 | * | |
476 | * Returns EMAC driver information (name and version) | |
477 | * | |
478 | */ | |
479 | static void emac_get_drvinfo(struct net_device *ndev, | |
480 | struct ethtool_drvinfo *info) | |
481 | { | |
482 | strlcpy(info->driver, emac_version_string, sizeof(info->driver)); | |
483 | strlcpy(info->version, EMAC_MODULE_VERSION, sizeof(info->version)); | |
484 | } | |
485 | ||
486 | /** | |
487 | * emac_get_settings - Get EMAC settings | |
488 | * @ndev: The DaVinci EMAC network adapter | |
489 | * @ecmd: ethtool command | |
490 | * | |
491 | * Executes ethool get command | |
492 | * | |
493 | */ | |
494 | static int emac_get_settings(struct net_device *ndev, | |
495 | struct ethtool_cmd *ecmd) | |
496 | { | |
497 | struct emac_priv *priv = netdev_priv(ndev); | |
498 | if (priv->phydev) | |
499 | return phy_ethtool_gset(priv->phydev, ecmd); | |
500 | else | |
501 | return -EOPNOTSUPP; | |
502 | ||
503 | } | |
504 | ||
505 | /** | |
506 | * emac_set_settings - Set EMAC settings | |
507 | * @ndev: The DaVinci EMAC network adapter | |
508 | * @ecmd: ethtool command | |
509 | * | |
510 | * Executes ethool set command | |
511 | * | |
512 | */ | |
513 | static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) | |
514 | { | |
515 | struct emac_priv *priv = netdev_priv(ndev); | |
516 | if (priv->phydev) | |
517 | return phy_ethtool_sset(priv->phydev, ecmd); | |
518 | else | |
519 | return -EOPNOTSUPP; | |
520 | ||
521 | } | |
522 | ||
523 | /** | |
524 | * emac_get_coalesce - Get interrupt coalesce settings for this device | |
525 | * @ndev : The DaVinci EMAC network adapter | |
526 | * @coal : ethtool coalesce settings structure | |
527 | * | |
528 | * Fetch the current interrupt coalesce settings | |
529 | * | |
530 | */ | |
531 | static int emac_get_coalesce(struct net_device *ndev, | |
532 | struct ethtool_coalesce *coal) | |
533 | { | |
534 | struct emac_priv *priv = netdev_priv(ndev); | |
535 | ||
536 | coal->rx_coalesce_usecs = priv->coal_intvl; | |
537 | return 0; | |
538 | ||
539 | } | |
540 | ||
541 | /** | |
542 | * emac_set_coalesce - Set interrupt coalesce settings for this device | |
543 | * @ndev : The DaVinci EMAC network adapter | |
544 | * @coal : ethtool coalesce settings structure | |
545 | * | |
546 | * Set interrupt coalesce parameters | |
547 | * | |
548 | */ | |
549 | static int emac_set_coalesce(struct net_device *ndev, | |
550 | struct ethtool_coalesce *coal) | |
551 | { | |
552 | struct emac_priv *priv = netdev_priv(ndev); | |
553 | u32 int_ctrl, num_interrupts = 0; | |
554 | u32 prescale = 0, addnl_dvdr = 1, coal_intvl = 0; | |
555 | ||
556 | if (!coal->rx_coalesce_usecs) | |
557 | return -EINVAL; | |
558 | ||
559 | coal_intvl = coal->rx_coalesce_usecs; | |
560 | ||
561 | switch (priv->version) { | |
562 | case EMAC_VERSION_2: | |
563 | int_ctrl = emac_ctrl_read(EMAC_DM646X_CMINTCTRL); | |
564 | prescale = priv->bus_freq_mhz * 4; | |
565 | ||
566 | if (coal_intvl < EMAC_DM646X_CMINTMIN_INTVL) | |
567 | coal_intvl = EMAC_DM646X_CMINTMIN_INTVL; | |
568 | ||
569 | if (coal_intvl > EMAC_DM646X_CMINTMAX_INTVL) { | |
570 | /* | |
571 | * Interrupt pacer works with 4us Pulse, we can | |
572 | * throttle further by dilating the 4us pulse. | |
573 | */ | |
574 | addnl_dvdr = EMAC_DM646X_INTPRESCALE_MASK / prescale; | |
575 | ||
576 | if (addnl_dvdr > 1) { | |
577 | prescale *= addnl_dvdr; | |
578 | if (coal_intvl > (EMAC_DM646X_CMINTMAX_INTVL | |
579 | * addnl_dvdr)) | |
580 | coal_intvl = (EMAC_DM646X_CMINTMAX_INTVL | |
581 | * addnl_dvdr); | |
582 | } else { | |
583 | addnl_dvdr = 1; | |
584 | coal_intvl = EMAC_DM646X_CMINTMAX_INTVL; | |
585 | } | |
586 | } | |
587 | ||
588 | num_interrupts = (1000 * addnl_dvdr) / coal_intvl; | |
589 | ||
590 | int_ctrl |= EMAC_DM646X_INTPACEEN; | |
591 | int_ctrl &= (~EMAC_DM646X_INTPRESCALE_MASK); | |
592 | int_ctrl |= (prescale & EMAC_DM646X_INTPRESCALE_MASK); | |
593 | emac_ctrl_write(EMAC_DM646X_CMINTCTRL, int_ctrl); | |
594 | ||
595 | emac_ctrl_write(EMAC_DM646X_CMRXINTMAX, num_interrupts); | |
596 | emac_ctrl_write(EMAC_DM646X_CMTXINTMAX, num_interrupts); | |
597 | ||
598 | break; | |
599 | default: | |
600 | int_ctrl = emac_ctrl_read(EMAC_CTRL_EWINTTCNT); | |
601 | int_ctrl &= (~EMAC_DM644X_EWINTCNT_MASK); | |
602 | prescale = coal_intvl * priv->bus_freq_mhz; | |
603 | if (prescale > EMAC_DM644X_EWINTCNT_MASK) { | |
604 | prescale = EMAC_DM644X_EWINTCNT_MASK; | |
605 | coal_intvl = prescale / priv->bus_freq_mhz; | |
606 | } | |
607 | emac_ctrl_write(EMAC_CTRL_EWINTTCNT, (int_ctrl | prescale)); | |
608 | ||
609 | break; | |
610 | } | |
611 | ||
612 | printk(KERN_INFO"Set coalesce to %d usecs.\n", coal_intvl); | |
613 | priv->coal_intvl = coal_intvl; | |
614 | ||
615 | return 0; | |
616 | ||
617 | } | |
618 | ||
619 | ||
620 | /* ethtool_ops: DaVinci EMAC Ethtool structure | |
621 | * | |
622 | * Ethtool support for EMAC adapter | |
623 | */ | |
624 | static const struct ethtool_ops ethtool_ops = { | |
625 | .get_drvinfo = emac_get_drvinfo, | |
626 | .get_settings = emac_get_settings, | |
627 | .set_settings = emac_set_settings, | |
628 | .get_link = ethtool_op_get_link, | |
629 | .get_coalesce = emac_get_coalesce, | |
630 | .set_coalesce = emac_set_coalesce, | |
631 | .get_ts_info = ethtool_op_get_ts_info, | |
632 | }; | |
633 | ||
634 | /** | |
635 | * emac_update_phystatus - Update Phy status | |
636 | * @priv: The DaVinci EMAC private adapter structure | |
637 | * | |
638 | * Updates phy status and takes action for network queue if required | |
639 | * based upon link status | |
640 | * | |
641 | */ | |
642 | static void emac_update_phystatus(struct emac_priv *priv) | |
643 | { | |
644 | u32 mac_control; | |
645 | u32 new_duplex; | |
646 | u32 cur_duplex; | |
647 | struct net_device *ndev = priv->ndev; | |
648 | ||
649 | mac_control = emac_read(EMAC_MACCONTROL); | |
650 | cur_duplex = (mac_control & EMAC_MACCONTROL_FULLDUPLEXEN) ? | |
651 | DUPLEX_FULL : DUPLEX_HALF; | |
652 | if (priv->phydev) | |
653 | new_duplex = priv->phydev->duplex; | |
654 | else | |
655 | new_duplex = DUPLEX_FULL; | |
656 | ||
657 | /* We get called only if link has changed (speed/duplex/status) */ | |
658 | if ((priv->link) && (new_duplex != cur_duplex)) { | |
659 | priv->duplex = new_duplex; | |
660 | if (DUPLEX_FULL == priv->duplex) | |
661 | mac_control |= (EMAC_MACCONTROL_FULLDUPLEXEN); | |
662 | else | |
663 | mac_control &= ~(EMAC_MACCONTROL_FULLDUPLEXEN); | |
664 | } | |
665 | ||
666 | if (priv->speed == SPEED_1000 && (priv->version == EMAC_VERSION_2)) { | |
667 | mac_control = emac_read(EMAC_MACCONTROL); | |
668 | mac_control |= (EMAC_DM646X_MACCONTORL_GIG | | |
669 | EMAC_DM646X_MACCONTORL_GIGFORCE); | |
670 | } else { | |
671 | /* Clear the GIG bit and GIGFORCE bit */ | |
672 | mac_control &= ~(EMAC_DM646X_MACCONTORL_GIGFORCE | | |
673 | EMAC_DM646X_MACCONTORL_GIG); | |
674 | ||
675 | if (priv->rmii_en && (priv->speed == SPEED_100)) | |
676 | mac_control |= EMAC_MACCONTROL_RMIISPEED_MASK; | |
677 | else | |
678 | mac_control &= ~EMAC_MACCONTROL_RMIISPEED_MASK; | |
679 | } | |
680 | ||
681 | /* Update mac_control if changed */ | |
682 | emac_write(EMAC_MACCONTROL, mac_control); | |
683 | ||
684 | if (priv->link) { | |
685 | /* link ON */ | |
686 | if (!netif_carrier_ok(ndev)) | |
687 | netif_carrier_on(ndev); | |
688 | /* reactivate the transmit queue if it is stopped */ | |
689 | if (netif_running(ndev) && netif_queue_stopped(ndev)) | |
690 | netif_wake_queue(ndev); | |
691 | } else { | |
692 | /* link OFF */ | |
693 | if (netif_carrier_ok(ndev)) | |
694 | netif_carrier_off(ndev); | |
695 | if (!netif_queue_stopped(ndev)) | |
696 | netif_stop_queue(ndev); | |
697 | } | |
698 | } | |
699 | ||
700 | /** | |
701 | * hash_get - Calculate hash value from mac address | |
702 | * @addr: mac address to delete from hash table | |
703 | * | |
704 | * Calculates hash value from mac address | |
705 | * | |
706 | */ | |
707 | static u32 hash_get(u8 *addr) | |
708 | { | |
709 | u32 hash; | |
710 | u8 tmpval; | |
711 | int cnt; | |
712 | hash = 0; | |
713 | ||
714 | for (cnt = 0; cnt < 2; cnt++) { | |
715 | tmpval = *addr++; | |
716 | hash ^= (tmpval >> 2) ^ (tmpval << 4); | |
717 | tmpval = *addr++; | |
718 | hash ^= (tmpval >> 4) ^ (tmpval << 2); | |
719 | tmpval = *addr++; | |
720 | hash ^= (tmpval >> 6) ^ (tmpval); | |
721 | } | |
722 | ||
723 | return hash & 0x3F; | |
724 | } | |
725 | ||
726 | /** | |
727 | * hash_add - Hash function to add mac addr from hash table | |
728 | * @priv: The DaVinci EMAC private adapter structure | |
729 | * @mac_addr: mac address to delete from hash table | |
730 | * | |
731 | * Adds mac address to the internal hash table | |
732 | * | |
733 | */ | |
734 | static int hash_add(struct emac_priv *priv, u8 *mac_addr) | |
735 | { | |
736 | struct device *emac_dev = &priv->ndev->dev; | |
737 | u32 rc = 0; | |
738 | u32 hash_bit; | |
739 | u32 hash_value = hash_get(mac_addr); | |
740 | ||
741 | if (hash_value >= EMAC_NUM_MULTICAST_BITS) { | |
742 | if (netif_msg_drv(priv)) { | |
743 | dev_err(emac_dev, "DaVinci EMAC: hash_add(): Invalid "\ | |
744 | "Hash %08x, should not be greater than %08x", | |
745 | hash_value, (EMAC_NUM_MULTICAST_BITS - 1)); | |
746 | } | |
747 | return -1; | |
748 | } | |
749 | ||
750 | /* set the hash bit only if not previously set */ | |
751 | if (priv->multicast_hash_cnt[hash_value] == 0) { | |
752 | rc = 1; /* hash value changed */ | |
753 | if (hash_value < 32) { | |
754 | hash_bit = BIT(hash_value); | |
755 | priv->mac_hash1 |= hash_bit; | |
756 | } else { | |
757 | hash_bit = BIT((hash_value - 32)); | |
758 | priv->mac_hash2 |= hash_bit; | |
759 | } | |
760 | } | |
761 | ||
762 | /* incr counter for num of mcast addr's mapped to "this" hash bit */ | |
763 | ++priv->multicast_hash_cnt[hash_value]; | |
764 | ||
765 | return rc; | |
766 | } | |
767 | ||
768 | /** | |
769 | * hash_del - Hash function to delete mac addr from hash table | |
770 | * @priv: The DaVinci EMAC private adapter structure | |
771 | * @mac_addr: mac address to delete from hash table | |
772 | * | |
773 | * Removes mac address from the internal hash table | |
774 | * | |
775 | */ | |
776 | static int hash_del(struct emac_priv *priv, u8 *mac_addr) | |
777 | { | |
778 | u32 hash_value; | |
779 | u32 hash_bit; | |
780 | ||
781 | hash_value = hash_get(mac_addr); | |
782 | if (priv->multicast_hash_cnt[hash_value] > 0) { | |
783 | /* dec cntr for num of mcast addr's mapped to this hash bit */ | |
784 | --priv->multicast_hash_cnt[hash_value]; | |
785 | } | |
786 | ||
787 | /* if counter still > 0, at least one multicast address refers | |
788 | * to this hash bit. so return 0 */ | |
789 | if (priv->multicast_hash_cnt[hash_value] > 0) | |
790 | return 0; | |
791 | ||
792 | if (hash_value < 32) { | |
793 | hash_bit = BIT(hash_value); | |
794 | priv->mac_hash1 &= ~hash_bit; | |
795 | } else { | |
796 | hash_bit = BIT((hash_value - 32)); | |
797 | priv->mac_hash2 &= ~hash_bit; | |
798 | } | |
799 | ||
800 | /* return 1 to indicate change in mac_hash registers reqd */ | |
801 | return 1; | |
802 | } | |
803 | ||
804 | /* EMAC multicast operation */ | |
805 | #define EMAC_MULTICAST_ADD 0 | |
806 | #define EMAC_MULTICAST_DEL 1 | |
807 | #define EMAC_ALL_MULTI_SET 2 | |
808 | #define EMAC_ALL_MULTI_CLR 3 | |
809 | ||
810 | /** | |
811 | * emac_add_mcast - Set multicast address in the EMAC adapter (Internal) | |
812 | * @priv: The DaVinci EMAC private adapter structure | |
813 | * @action: multicast operation to perform | |
814 | * mac_addr: mac address to set | |
815 | * | |
816 | * Set multicast addresses in EMAC adapter - internal function | |
817 | * | |
818 | */ | |
819 | static void emac_add_mcast(struct emac_priv *priv, u32 action, u8 *mac_addr) | |
820 | { | |
821 | struct device *emac_dev = &priv->ndev->dev; | |
822 | int update = -1; | |
823 | ||
824 | switch (action) { | |
825 | case EMAC_MULTICAST_ADD: | |
826 | update = hash_add(priv, mac_addr); | |
827 | break; | |
828 | case EMAC_MULTICAST_DEL: | |
829 | update = hash_del(priv, mac_addr); | |
830 | break; | |
831 | case EMAC_ALL_MULTI_SET: | |
832 | update = 1; | |
833 | priv->mac_hash1 = EMAC_ALL_MULTI_REG_VALUE; | |
834 | priv->mac_hash2 = EMAC_ALL_MULTI_REG_VALUE; | |
835 | break; | |
836 | case EMAC_ALL_MULTI_CLR: | |
837 | update = 1; | |
838 | priv->mac_hash1 = 0; | |
839 | priv->mac_hash2 = 0; | |
840 | memset(&(priv->multicast_hash_cnt[0]), 0, | |
841 | sizeof(priv->multicast_hash_cnt[0]) * | |
842 | EMAC_NUM_MULTICAST_BITS); | |
843 | break; | |
844 | default: | |
845 | if (netif_msg_drv(priv)) | |
846 | dev_err(emac_dev, "DaVinci EMAC: add_mcast"\ | |
847 | ": bad operation %d", action); | |
848 | break; | |
849 | } | |
850 | ||
851 | /* write to the hardware only if the register status chances */ | |
852 | if (update > 0) { | |
853 | emac_write(EMAC_MACHASH1, priv->mac_hash1); | |
854 | emac_write(EMAC_MACHASH2, priv->mac_hash2); | |
855 | } | |
856 | } | |
857 | ||
858 | /** | |
859 | * emac_dev_mcast_set - Set multicast address in the EMAC adapter | |
860 | * @ndev: The DaVinci EMAC network adapter | |
861 | * | |
862 | * Set multicast addresses in EMAC adapter | |
863 | * | |
864 | */ | |
865 | static void emac_dev_mcast_set(struct net_device *ndev) | |
866 | { | |
867 | u32 mbp_enable; | |
868 | struct emac_priv *priv = netdev_priv(ndev); | |
869 | ||
870 | mbp_enable = emac_read(EMAC_RXMBPENABLE); | |
871 | if (ndev->flags & IFF_PROMISC) { | |
872 | mbp_enable &= (~EMAC_MBP_PROMISCCH(EMAC_DEF_PROM_CH)); | |
873 | mbp_enable |= (EMAC_MBP_RXPROMISC); | |
874 | } else { | |
875 | mbp_enable = (mbp_enable & ~EMAC_MBP_RXPROMISC); | |
876 | if ((ndev->flags & IFF_ALLMULTI) || | |
877 | netdev_mc_count(ndev) > EMAC_DEF_MAX_MULTICAST_ADDRESSES) { | |
878 | mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST); | |
879 | emac_add_mcast(priv, EMAC_ALL_MULTI_SET, NULL); | |
880 | } else 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 | /* NOTE: Rx Threshold and Misc interrupts are not enabled */ | |
926 | ||
927 | /* ack rxen only then a new pulse will be generated */ | |
928 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
929 | EMAC_DM646X_MAC_EOI_C0_RXEN); | |
930 | ||
931 | /* ack txen- only then a new pulse will be generated */ | |
932 | emac_write(EMAC_DM646X_MACEOIVECTOR, | |
933 | EMAC_DM646X_MAC_EOI_C0_TXEN); | |
934 | ||
935 | local_irq_restore(flags); | |
936 | ||
937 | } else { | |
938 | /* Set DM644x control registers for interrupt control */ | |
939 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x0); | |
940 | } | |
941 | } | |
942 | ||
943 | /** | |
944 | * emac_int_enable - Enable EMAC module interrupt (from adapter) | |
945 | * @priv: The DaVinci EMAC private adapter structure | |
946 | * | |
947 | * Enable EMAC interrupt on the adapter | |
948 | * | |
949 | */ | |
950 | static void emac_int_enable(struct emac_priv *priv) | |
951 | { | |
952 | if (priv->version == EMAC_VERSION_2) { | |
953 | if (priv->int_enable) | |
954 | priv->int_enable(); | |
955 | ||
956 | emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0xff); | |
957 | emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0xff); | |
958 | ||
959 | /* In addition to turning on interrupt Enable, we need | |
960 | * ack by writing appropriate values to the EOI | |
961 | * register */ | |
962 | ||
963 | /* NOTE: Rx Threshold and Misc interrupts are not enabled */ | |
964 | } else { | |
965 | /* Set DM644x control registers for interrupt control */ | |
966 | emac_ctrl_write(EMAC_CTRL_EWCTL, 0x1); | |
967 | } | |
968 | } | |
969 | ||
970 | /** | |
971 | * emac_irq - EMAC interrupt handler | |
972 | * @irq: interrupt number | |
973 | * @dev_id: EMAC network adapter data structure ptr | |
974 | * | |
975 | * EMAC Interrupt handler - we only schedule NAPI and not process any packets | |
976 | * here. EVen the interrupt status is checked (TX/RX/Err) in NAPI poll function | |
977 | * | |
978 | * Returns interrupt handled condition | |
979 | */ | |
980 | static irqreturn_t emac_irq(int irq, void *dev_id) | |
981 | { | |
982 | struct net_device *ndev = (struct net_device *)dev_id; | |
983 | struct emac_priv *priv = netdev_priv(ndev); | |
984 | ||
985 | ++priv->isr_count; | |
986 | if (likely(netif_running(priv->ndev))) { | |
987 | emac_int_disable(priv); | |
988 | napi_schedule(&priv->napi); | |
989 | } else { | |
990 | /* we are closing down, so dont process anything */ | |
991 | } | |
992 | return IRQ_HANDLED; | |
993 | } | |
994 | ||
995 | static struct sk_buff *emac_rx_alloc(struct emac_priv *priv) | |
996 | { | |
997 | struct sk_buff *skb = netdev_alloc_skb(priv->ndev, priv->rx_buf_size); | |
998 | if (WARN_ON(!skb)) | |
999 | return NULL; | |
1000 | skb_reserve(skb, NET_IP_ALIGN); | |
1001 | return skb; | |
1002 | } | |
1003 | ||
1004 | static void emac_rx_handler(void *token, int len, int status) | |
1005 | { | |
1006 | struct sk_buff *skb = token; | |
1007 | struct net_device *ndev = skb->dev; | |
1008 | struct emac_priv *priv = netdev_priv(ndev); | |
1009 | struct device *emac_dev = &ndev->dev; | |
1010 | int ret; | |
1011 | ||
1012 | /* free and bail if we are shutting down */ | |
1013 | if (unlikely(!netif_running(ndev))) { | |
1014 | dev_kfree_skb_any(skb); | |
1015 | return; | |
1016 | } | |
1017 | ||
1018 | /* recycle on receive error */ | |
1019 | if (status < 0) { | |
1020 | ndev->stats.rx_errors++; | |
1021 | goto recycle; | |
1022 | } | |
1023 | ||
1024 | /* feed received packet up the stack */ | |
1025 | skb_put(skb, len); | |
1026 | skb->protocol = eth_type_trans(skb, ndev); | |
1027 | netif_receive_skb(skb); | |
1028 | ndev->stats.rx_bytes += len; | |
1029 | ndev->stats.rx_packets++; | |
1030 | ||
1031 | /* alloc a new packet for receive */ | |
1032 | skb = emac_rx_alloc(priv); | |
1033 | if (!skb) { | |
1034 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
1035 | dev_err(emac_dev, "failed rx buffer alloc\n"); | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | recycle: | |
1040 | ret = cpdma_chan_submit(priv->rxchan, skb, skb->data, | |
1041 | skb_tailroom(skb), 0); | |
1042 | ||
1043 | WARN_ON(ret == -ENOMEM); | |
1044 | if (unlikely(ret < 0)) | |
1045 | dev_kfree_skb_any(skb); | |
1046 | } | |
1047 | ||
1048 | static void emac_tx_handler(void *token, int len, int status) | |
1049 | { | |
1050 | struct sk_buff *skb = token; | |
1051 | struct net_device *ndev = skb->dev; | |
1052 | ||
1053 | /* Check whether the queue is stopped due to stalled tx dma, if the | |
1054 | * queue is stopped then start the queue as we have free desc for tx | |
1055 | */ | |
1056 | if (unlikely(netif_queue_stopped(ndev))) | |
1057 | netif_wake_queue(ndev); | |
1058 | ndev->stats.tx_packets++; | |
1059 | ndev->stats.tx_bytes += len; | |
1060 | dev_kfree_skb_any(skb); | |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * emac_dev_xmit - EMAC Transmit function | |
1065 | * @skb: SKB pointer | |
1066 | * @ndev: The DaVinci EMAC network adapter | |
1067 | * | |
1068 | * Called by the system to transmit a packet - we queue the packet in | |
1069 | * EMAC hardware transmit queue | |
1070 | * | |
1071 | * Returns success(NETDEV_TX_OK) or error code (typically out of desc's) | |
1072 | */ | |
1073 | static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1074 | { | |
1075 | struct device *emac_dev = &ndev->dev; | |
1076 | int ret_code; | |
1077 | struct emac_priv *priv = netdev_priv(ndev); | |
1078 | ||
1079 | /* If no link, return */ | |
1080 | if (unlikely(!priv->link)) { | |
1081 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1082 | dev_err(emac_dev, "DaVinci EMAC: No link to transmit"); | |
1083 | goto fail_tx; | |
1084 | } | |
1085 | ||
1086 | ret_code = skb_padto(skb, EMAC_DEF_MIN_ETHPKTSIZE); | |
1087 | if (unlikely(ret_code < 0)) { | |
1088 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1089 | dev_err(emac_dev, "DaVinci EMAC: packet pad failed"); | |
1090 | goto fail_tx; | |
1091 | } | |
1092 | ||
1093 | skb_tx_timestamp(skb); | |
1094 | ||
1095 | ret_code = cpdma_chan_submit(priv->txchan, skb, skb->data, skb->len, | |
1096 | 0); | |
1097 | if (unlikely(ret_code != 0)) { | |
1098 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
1099 | dev_err(emac_dev, "DaVinci EMAC: desc submit failed"); | |
1100 | goto fail_tx; | |
1101 | } | |
1102 | ||
1103 | /* If there is no more tx desc left free then we need to | |
1104 | * tell the kernel to stop sending us tx frames. | |
1105 | */ | |
1106 | if (unlikely(!cpdma_check_free_tx_desc(priv->txchan))) | |
1107 | netif_stop_queue(ndev); | |
1108 | ||
1109 | return NETDEV_TX_OK; | |
1110 | ||
1111 | fail_tx: | |
1112 | ndev->stats.tx_dropped++; | |
1113 | netif_stop_queue(ndev); | |
1114 | return NETDEV_TX_BUSY; | |
1115 | } | |
1116 | ||
1117 | /** | |
1118 | * emac_dev_tx_timeout - EMAC Transmit timeout function | |
1119 | * @ndev: The DaVinci EMAC network adapter | |
1120 | * | |
1121 | * Called when system detects that a skb timeout period has expired | |
1122 | * potentially due to a fault in the adapter in not being able to send | |
1123 | * it out on the wire. We teardown the TX channel assuming a hardware | |
1124 | * error and re-initialize the TX channel for hardware operation | |
1125 | * | |
1126 | */ | |
1127 | static void emac_dev_tx_timeout(struct net_device *ndev) | |
1128 | { | |
1129 | struct emac_priv *priv = netdev_priv(ndev); | |
1130 | struct device *emac_dev = &ndev->dev; | |
1131 | ||
1132 | if (netif_msg_tx_err(priv)) | |
1133 | dev_err(emac_dev, "DaVinci EMAC: xmit timeout, restarting TX"); | |
1134 | ||
1135 | emac_dump_regs(priv); | |
1136 | ||
1137 | ndev->stats.tx_errors++; | |
1138 | emac_int_disable(priv); | |
1139 | cpdma_chan_stop(priv->txchan); | |
1140 | cpdma_chan_start(priv->txchan); | |
1141 | emac_int_enable(priv); | |
1142 | } | |
1143 | ||
1144 | /** | |
1145 | * emac_set_type0addr - Set EMAC Type0 mac address | |
1146 | * @priv: The DaVinci EMAC private adapter structure | |
1147 | * @ch: RX channel number | |
1148 | * @mac_addr: MAC address to set in device | |
1149 | * | |
1150 | * Called internally to set Type0 mac address of the adapter (Device) | |
1151 | * | |
1152 | * Returns success (0) or appropriate error code (none as of now) | |
1153 | */ | |
1154 | static void emac_set_type0addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1155 | { | |
1156 | u32 val; | |
1157 | val = ((mac_addr[5] << 8) | (mac_addr[4])); | |
1158 | emac_write(EMAC_MACSRCADDRLO, val); | |
1159 | ||
1160 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1161 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1162 | emac_write(EMAC_MACSRCADDRHI, val); | |
1163 | val = emac_read(EMAC_RXUNICASTSET); | |
1164 | val |= BIT(ch); | |
1165 | emac_write(EMAC_RXUNICASTSET, val); | |
1166 | val = emac_read(EMAC_RXUNICASTCLEAR); | |
1167 | val &= ~BIT(ch); | |
1168 | emac_write(EMAC_RXUNICASTCLEAR, val); | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * emac_set_type1addr - Set EMAC Type1 mac address | |
1173 | * @priv: The DaVinci EMAC private adapter structure | |
1174 | * @ch: RX channel number | |
1175 | * @mac_addr: MAC address to set in device | |
1176 | * | |
1177 | * Called internally to set Type1 mac address of the adapter (Device) | |
1178 | * | |
1179 | * Returns success (0) or appropriate error code (none as of now) | |
1180 | */ | |
1181 | static void emac_set_type1addr(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1182 | { | |
1183 | u32 val; | |
1184 | emac_write(EMAC_MACINDEX, ch); | |
1185 | val = ((mac_addr[5] << 8) | mac_addr[4]); | |
1186 | emac_write(EMAC_MACADDRLO, val); | |
1187 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1188 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1189 | emac_write(EMAC_MACADDRHI, val); | |
1190 | emac_set_type0addr(priv, ch, mac_addr); | |
1191 | } | |
1192 | ||
1193 | /** | |
1194 | * emac_set_type2addr - Set EMAC Type2 mac address | |
1195 | * @priv: The DaVinci EMAC private adapter structure | |
1196 | * @ch: RX channel number | |
1197 | * @mac_addr: MAC address to set in device | |
1198 | * @index: index into RX address entries | |
1199 | * @match: match parameter for RX address matching logic | |
1200 | * | |
1201 | * Called internally to set Type2 mac address of the adapter (Device) | |
1202 | * | |
1203 | * Returns success (0) or appropriate error code (none as of now) | |
1204 | */ | |
1205 | static void emac_set_type2addr(struct emac_priv *priv, u32 ch, | |
1206 | char *mac_addr, int index, int match) | |
1207 | { | |
1208 | u32 val; | |
1209 | emac_write(EMAC_MACINDEX, index); | |
1210 | val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \ | |
1211 | (mac_addr[1] << 8) | (mac_addr[0])); | |
1212 | emac_write(EMAC_MACADDRHI, val); | |
1213 | val = ((mac_addr[5] << 8) | mac_addr[4] | ((ch & 0x7) << 16) | \ | |
1214 | (match << 19) | BIT(20)); | |
1215 | emac_write(EMAC_MACADDRLO, val); | |
1216 | emac_set_type0addr(priv, ch, mac_addr); | |
1217 | } | |
1218 | ||
1219 | /** | |
1220 | * emac_setmac - Set mac address in the adapter (internal function) | |
1221 | * @priv: The DaVinci EMAC private adapter structure | |
1222 | * @ch: RX channel number | |
1223 | * @mac_addr: MAC address to set in device | |
1224 | * | |
1225 | * Called internally to set the mac address of the adapter (Device) | |
1226 | * | |
1227 | * Returns success (0) or appropriate error code (none as of now) | |
1228 | */ | |
1229 | static void emac_setmac(struct emac_priv *priv, u32 ch, char *mac_addr) | |
1230 | { | |
1231 | struct device *emac_dev = &priv->ndev->dev; | |
1232 | ||
1233 | if (priv->rx_addr_type == 0) { | |
1234 | emac_set_type0addr(priv, ch, mac_addr); | |
1235 | } else if (priv->rx_addr_type == 1) { | |
1236 | u32 cnt; | |
1237 | for (cnt = 0; cnt < EMAC_MAX_TXRX_CHANNELS; cnt++) | |
1238 | emac_set_type1addr(priv, ch, mac_addr); | |
1239 | } else if (priv->rx_addr_type == 2) { | |
1240 | emac_set_type2addr(priv, ch, mac_addr, ch, 1); | |
1241 | emac_set_type0addr(priv, ch, mac_addr); | |
1242 | } else { | |
1243 | if (netif_msg_drv(priv)) | |
1244 | dev_err(emac_dev, "DaVinci EMAC: Wrong addressing\n"); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /** | |
1249 | * emac_dev_setmac_addr - Set mac address in the adapter | |
1250 | * @ndev: The DaVinci EMAC network adapter | |
1251 | * @addr: MAC address to set in device | |
1252 | * | |
1253 | * Called by the system to set the mac address of the adapter (Device) | |
1254 | * | |
1255 | * Returns success (0) or appropriate error code (none as of now) | |
1256 | */ | |
1257 | static int emac_dev_setmac_addr(struct net_device *ndev, void *addr) | |
1258 | { | |
1259 | struct emac_priv *priv = netdev_priv(ndev); | |
1260 | struct device *emac_dev = &priv->ndev->dev; | |
1261 | struct sockaddr *sa = addr; | |
1262 | ||
1263 | if (!is_valid_ether_addr(sa->sa_data)) | |
1264 | return -EADDRNOTAVAIL; | |
1265 | ||
1266 | /* Store mac addr in priv and rx channel and set it in EMAC hw */ | |
1267 | memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len); | |
1268 | memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len); | |
1269 | ||
1270 | /* MAC address is configured only after the interface is enabled. */ | |
1271 | if (netif_running(ndev)) { | |
1272 | emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr); | |
1273 | } | |
1274 | ||
1275 | if (netif_msg_drv(priv)) | |
1276 | dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %pM\n", | |
1277 | priv->mac_addr); | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * emac_hw_enable - Enable EMAC hardware for packet transmission/reception | |
1284 | * @priv: The DaVinci EMAC private adapter structure | |
1285 | * | |
1286 | * Enables EMAC hardware for packet processing - enables PHY, enables RX | |
1287 | * for packet reception and enables device interrupts and then NAPI | |
1288 | * | |
1289 | * Returns success (0) or appropriate error code (none right now) | |
1290 | */ | |
1291 | static int emac_hw_enable(struct emac_priv *priv) | |
1292 | { | |
1293 | u32 val, mbp_enable, mac_control; | |
1294 | ||
1295 | /* Soft reset */ | |
1296 | emac_write(EMAC_SOFTRESET, 1); | |
1297 | while (emac_read(EMAC_SOFTRESET)) | |
1298 | cpu_relax(); | |
1299 | ||
1300 | /* Disable interrupt & Set pacing for more interrupts initially */ | |
1301 | emac_int_disable(priv); | |
1302 | ||
1303 | /* Full duplex enable bit set when auto negotiation happens */ | |
1304 | mac_control = | |
1305 | (((EMAC_DEF_TXPRIO_FIXED) ? (EMAC_MACCONTROL_TXPTYPE) : 0x0) | | |
1306 | ((priv->speed == 1000) ? EMAC_MACCONTROL_GIGABITEN : 0x0) | | |
1307 | ((EMAC_DEF_TXPACING_EN) ? (EMAC_MACCONTROL_TXPACEEN) : 0x0) | | |
1308 | ((priv->duplex == DUPLEX_FULL) ? 0x1 : 0)); | |
1309 | emac_write(EMAC_MACCONTROL, mac_control); | |
1310 | ||
1311 | mbp_enable = | |
1312 | (((EMAC_DEF_PASS_CRC) ? (EMAC_RXMBP_PASSCRC_MASK) : 0x0) | | |
1313 | ((EMAC_DEF_QOS_EN) ? (EMAC_RXMBP_QOSEN_MASK) : 0x0) | | |
1314 | ((EMAC_DEF_NO_BUFF_CHAIN) ? (EMAC_RXMBP_NOCHAIN_MASK) : 0x0) | | |
1315 | ((EMAC_DEF_MACCTRL_FRAME_EN) ? (EMAC_RXMBP_CMFEN_MASK) : 0x0) | | |
1316 | ((EMAC_DEF_SHORT_FRAME_EN) ? (EMAC_RXMBP_CSFEN_MASK) : 0x0) | | |
1317 | ((EMAC_DEF_ERROR_FRAME_EN) ? (EMAC_RXMBP_CEFEN_MASK) : 0x0) | | |
1318 | ((EMAC_DEF_PROM_EN) ? (EMAC_RXMBP_CAFEN_MASK) : 0x0) | | |
1319 | ((EMAC_DEF_PROM_CH & EMAC_RXMBP_CHMASK) << \ | |
1320 | EMAC_RXMBP_PROMCH_SHIFT) | | |
1321 | ((EMAC_DEF_BCAST_EN) ? (EMAC_RXMBP_BROADEN_MASK) : 0x0) | | |
1322 | ((EMAC_DEF_BCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
1323 | EMAC_RXMBP_BROADCH_SHIFT) | | |
1324 | ((EMAC_DEF_MCAST_EN) ? (EMAC_RXMBP_MULTIEN_MASK) : 0x0) | | |
1325 | ((EMAC_DEF_MCAST_CH & EMAC_RXMBP_CHMASK) << \ | |
1326 | EMAC_RXMBP_MULTICH_SHIFT)); | |
1327 | emac_write(EMAC_RXMBPENABLE, mbp_enable); | |
1328 | emac_write(EMAC_RXMAXLEN, (EMAC_DEF_MAX_FRAME_SIZE & | |
1329 | EMAC_RX_MAX_LEN_MASK)); | |
1330 | emac_write(EMAC_RXBUFFEROFFSET, (EMAC_DEF_BUFFER_OFFSET & | |
1331 | EMAC_RX_BUFFER_OFFSET_MASK)); | |
1332 | emac_write(EMAC_RXFILTERLOWTHRESH, 0); | |
1333 | emac_write(EMAC_RXUNICASTCLEAR, EMAC_RX_UNICAST_CLEAR_ALL); | |
1334 | priv->rx_addr_type = (emac_read(EMAC_MACCONFIG) >> 8) & 0xFF; | |
1335 | ||
1336 | emac_write(EMAC_MACINTMASKSET, EMAC_MAC_HOST_ERR_INTMASK_VAL); | |
1337 | ||
1338 | emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr); | |
1339 | ||
1340 | /* Enable MII */ | |
1341 | val = emac_read(EMAC_MACCONTROL); | |
1342 | val |= (EMAC_MACCONTROL_GMIIEN); | |
1343 | emac_write(EMAC_MACCONTROL, val); | |
1344 | ||
1345 | /* Enable NAPI and interrupts */ | |
1346 | napi_enable(&priv->napi); | |
1347 | emac_int_enable(priv); | |
1348 | return 0; | |
1349 | ||
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * emac_poll - EMAC NAPI Poll function | |
1354 | * @ndev: The DaVinci EMAC network adapter | |
1355 | * @budget: Number of receive packets to process (as told by NAPI layer) | |
1356 | * | |
1357 | * NAPI Poll function implemented to process packets as per budget. We check | |
1358 | * the type of interrupt on the device and accordingly call the TX or RX | |
1359 | * packet processing functions. We follow the budget for RX processing and | |
1360 | * also put a cap on number of TX pkts processed through config param. The | |
1361 | * NAPI schedule function is called if more packets pending. | |
1362 | * | |
1363 | * Returns number of packets received (in most cases; else TX pkts - rarely) | |
1364 | */ | |
1365 | static int emac_poll(struct napi_struct *napi, int budget) | |
1366 | { | |
1367 | unsigned int mask; | |
1368 | struct emac_priv *priv = container_of(napi, struct emac_priv, napi); | |
1369 | struct net_device *ndev = priv->ndev; | |
1370 | struct device *emac_dev = &ndev->dev; | |
1371 | u32 status = 0; | |
1372 | u32 num_tx_pkts = 0, num_rx_pkts = 0; | |
1373 | ||
1374 | /* Check interrupt vectors and call packet processing */ | |
1375 | status = emac_read(EMAC_MACINVECTOR); | |
1376 | ||
1377 | mask = EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC; | |
1378 | ||
1379 | if (priv->version == EMAC_VERSION_2) | |
1380 | mask = EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC; | |
1381 | ||
1382 | if (status & mask) { | |
1383 | num_tx_pkts = cpdma_chan_process(priv->txchan, | |
1384 | EMAC_DEF_TX_MAX_SERVICE); | |
1385 | } /* TX processing */ | |
1386 | ||
1387 | mask = EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC; | |
1388 | ||
1389 | if (priv->version == EMAC_VERSION_2) | |
1390 | mask = EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC; | |
1391 | ||
1392 | if (status & mask) { | |
1393 | num_rx_pkts = cpdma_chan_process(priv->rxchan, budget); | |
1394 | } /* RX processing */ | |
1395 | ||
1396 | mask = EMAC_DM644X_MAC_IN_VECTOR_HOST_INT; | |
1397 | if (priv->version == EMAC_VERSION_2) | |
1398 | mask = EMAC_DM646X_MAC_IN_VECTOR_HOST_INT; | |
1399 | ||
1400 | if (unlikely(status & mask)) { | |
1401 | u32 ch, cause; | |
1402 | dev_err(emac_dev, "DaVinci EMAC: Fatal Hardware Error\n"); | |
1403 | netif_stop_queue(ndev); | |
1404 | napi_disable(&priv->napi); | |
1405 | ||
1406 | status = emac_read(EMAC_MACSTATUS); | |
1407 | cause = ((status & EMAC_MACSTATUS_TXERRCODE_MASK) >> | |
1408 | EMAC_MACSTATUS_TXERRCODE_SHIFT); | |
1409 | if (cause) { | |
1410 | ch = ((status & EMAC_MACSTATUS_TXERRCH_MASK) >> | |
1411 | EMAC_MACSTATUS_TXERRCH_SHIFT); | |
1412 | if (net_ratelimit()) { | |
1413 | dev_err(emac_dev, "TX Host error %s on ch=%d\n", | |
1414 | &emac_txhost_errcodes[cause][0], ch); | |
1415 | } | |
1416 | } | |
1417 | cause = ((status & EMAC_MACSTATUS_RXERRCODE_MASK) >> | |
1418 | EMAC_MACSTATUS_RXERRCODE_SHIFT); | |
1419 | if (cause) { | |
1420 | ch = ((status & EMAC_MACSTATUS_RXERRCH_MASK) >> | |
1421 | EMAC_MACSTATUS_RXERRCH_SHIFT); | |
1422 | if (netif_msg_hw(priv) && net_ratelimit()) | |
1423 | dev_err(emac_dev, "RX Host error %s on ch=%d\n", | |
1424 | &emac_rxhost_errcodes[cause][0], ch); | |
1425 | } | |
1426 | } else if (num_rx_pkts < budget) { | |
1427 | napi_complete(napi); | |
1428 | emac_int_enable(priv); | |
1429 | } | |
1430 | ||
1431 | return num_rx_pkts; | |
1432 | } | |
1433 | ||
1434 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1435 | /** | |
1436 | * emac_poll_controller - EMAC Poll controller function | |
1437 | * @ndev: The DaVinci EMAC network adapter | |
1438 | * | |
1439 | * Polled functionality used by netconsole and others in non interrupt mode | |
1440 | * | |
1441 | */ | |
1442 | static void emac_poll_controller(struct net_device *ndev) | |
1443 | { | |
1444 | struct emac_priv *priv = netdev_priv(ndev); | |
1445 | ||
1446 | emac_int_disable(priv); | |
1447 | emac_irq(ndev->irq, ndev); | |
1448 | emac_int_enable(priv); | |
1449 | } | |
1450 | #endif | |
1451 | ||
1452 | static void emac_adjust_link(struct net_device *ndev) | |
1453 | { | |
1454 | struct emac_priv *priv = netdev_priv(ndev); | |
1455 | struct phy_device *phydev = priv->phydev; | |
1456 | unsigned long flags; | |
1457 | int new_state = 0; | |
1458 | ||
1459 | spin_lock_irqsave(&priv->lock, flags); | |
1460 | ||
1461 | if (phydev->link) { | |
1462 | /* check the mode of operation - full/half duplex */ | |
1463 | if (phydev->duplex != priv->duplex) { | |
1464 | new_state = 1; | |
1465 | priv->duplex = phydev->duplex; | |
1466 | } | |
1467 | if (phydev->speed != priv->speed) { | |
1468 | new_state = 1; | |
1469 | priv->speed = phydev->speed; | |
1470 | } | |
1471 | if (!priv->link) { | |
1472 | new_state = 1; | |
1473 | priv->link = 1; | |
1474 | } | |
1475 | ||
1476 | } else if (priv->link) { | |
1477 | new_state = 1; | |
1478 | priv->link = 0; | |
1479 | priv->speed = 0; | |
1480 | priv->duplex = ~0; | |
1481 | } | |
1482 | if (new_state) { | |
1483 | emac_update_phystatus(priv); | |
1484 | phy_print_status(priv->phydev); | |
1485 | } | |
1486 | ||
1487 | spin_unlock_irqrestore(&priv->lock, flags); | |
1488 | } | |
1489 | ||
1490 | /************************************************************************* | |
1491 | * Linux Driver Model | |
1492 | *************************************************************************/ | |
1493 | ||
1494 | /** | |
1495 | * emac_devioctl - EMAC adapter ioctl | |
1496 | * @ndev: The DaVinci EMAC network adapter | |
1497 | * @ifrq: request parameter | |
1498 | * @cmd: command parameter | |
1499 | * | |
1500 | * EMAC driver ioctl function | |
1501 | * | |
1502 | * Returns success(0) or appropriate error code | |
1503 | */ | |
1504 | static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd) | |
1505 | { | |
1506 | struct emac_priv *priv = netdev_priv(ndev); | |
1507 | ||
1508 | if (!(netif_running(ndev))) | |
1509 | return -EINVAL; | |
1510 | ||
1511 | /* TODO: Add phy read and write and private statistics get feature */ | |
1512 | ||
1513 | return phy_mii_ioctl(priv->phydev, ifrq, cmd); | |
1514 | } | |
1515 | ||
1516 | static int match_first_device(struct device *dev, void *data) | |
1517 | { | |
1518 | return !strncmp(dev_name(dev), "davinci_mdio", 12); | |
1519 | } | |
1520 | ||
1521 | /** | |
1522 | * emac_dev_open - EMAC device open | |
1523 | * @ndev: The DaVinci EMAC network adapter | |
1524 | * | |
1525 | * Called when system wants to start the interface. We init TX/RX channels | |
1526 | * and enable the hardware for packet reception/transmission and start the | |
1527 | * network queue. | |
1528 | * | |
1529 | * Returns 0 for a successful open, or appropriate error code | |
1530 | */ | |
1531 | static int emac_dev_open(struct net_device *ndev) | |
1532 | { | |
1533 | struct device *emac_dev = &ndev->dev; | |
1534 | u32 cnt; | |
1535 | struct resource *res; | |
1536 | int q, m, ret; | |
1537 | int res_num = 0, irq_num = 0; | |
1538 | int i = 0; | |
1539 | struct emac_priv *priv = netdev_priv(ndev); | |
1540 | ||
1541 | ret = pm_runtime_get_sync(&priv->pdev->dev); | |
1542 | if (ret < 0) { | |
1543 | pm_runtime_put_noidle(&priv->pdev->dev); | |
1544 | dev_err(&priv->pdev->dev, "%s: failed to get_sync(%d)\n", | |
1545 | __func__, ret); | |
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | netif_carrier_off(ndev); | |
1550 | for (cnt = 0; cnt < ETH_ALEN; cnt++) | |
1551 | ndev->dev_addr[cnt] = priv->mac_addr[cnt]; | |
1552 | ||
1553 | /* Configuration items */ | |
1554 | priv->rx_buf_size = EMAC_DEF_MAX_FRAME_SIZE + NET_IP_ALIGN; | |
1555 | ||
1556 | priv->mac_hash1 = 0; | |
1557 | priv->mac_hash2 = 0; | |
1558 | emac_write(EMAC_MACHASH1, 0); | |
1559 | emac_write(EMAC_MACHASH2, 0); | |
1560 | ||
1561 | for (i = 0; i < EMAC_DEF_RX_NUM_DESC; i++) { | |
1562 | struct sk_buff *skb = emac_rx_alloc(priv); | |
1563 | ||
1564 | if (!skb) | |
1565 | break; | |
1566 | ||
1567 | ret = cpdma_chan_submit(priv->rxchan, skb, skb->data, | |
1568 | skb_tailroom(skb), 0); | |
1569 | if (WARN_ON(ret < 0)) | |
1570 | break; | |
1571 | } | |
1572 | ||
1573 | /* Request IRQ */ | |
1574 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, | |
1575 | res_num))) { | |
1576 | for (irq_num = res->start; irq_num <= res->end; irq_num++) { | |
1577 | if (request_irq(irq_num, emac_irq, 0, ndev->name, | |
1578 | ndev)) { | |
1579 | dev_err(emac_dev, | |
1580 | "DaVinci EMAC: request_irq() failed\n"); | |
1581 | ret = -EBUSY; | |
1582 | ||
1583 | goto rollback; | |
1584 | } | |
1585 | } | |
1586 | res_num++; | |
1587 | } | |
1588 | /* prepare counters for rollback in case of an error */ | |
1589 | res_num--; | |
1590 | irq_num--; | |
1591 | ||
1592 | /* Start/Enable EMAC hardware */ | |
1593 | emac_hw_enable(priv); | |
1594 | ||
1595 | /* Enable Interrupt pacing if configured */ | |
1596 | if (priv->coal_intvl != 0) { | |
1597 | struct ethtool_coalesce coal; | |
1598 | ||
1599 | coal.rx_coalesce_usecs = (priv->coal_intvl << 4); | |
1600 | emac_set_coalesce(ndev, &coal); | |
1601 | } | |
1602 | ||
1603 | cpdma_ctlr_start(priv->dma); | |
1604 | ||
1605 | priv->phydev = NULL; | |
1606 | /* use the first phy on the bus if pdata did not give us a phy id */ | |
1607 | if (!priv->phy_id) { | |
1608 | struct device *phy; | |
1609 | ||
1610 | phy = bus_find_device(&mdio_bus_type, NULL, NULL, | |
1611 | match_first_device); | |
1612 | if (phy) | |
1613 | priv->phy_id = dev_name(phy); | |
1614 | } | |
1615 | ||
1616 | if (priv->phy_id && *priv->phy_id) { | |
1617 | priv->phydev = phy_connect(ndev, priv->phy_id, | |
1618 | &emac_adjust_link, | |
1619 | PHY_INTERFACE_MODE_MII); | |
1620 | ||
1621 | if (IS_ERR(priv->phydev)) { | |
1622 | dev_err(emac_dev, "could not connect to phy %s\n", | |
1623 | priv->phy_id); | |
1624 | ret = PTR_ERR(priv->phydev); | |
1625 | priv->phydev = NULL; | |
1626 | goto err; | |
1627 | } | |
1628 | ||
1629 | priv->link = 0; | |
1630 | priv->speed = 0; | |
1631 | priv->duplex = ~0; | |
1632 | ||
1633 | dev_info(emac_dev, "attached PHY driver [%s] " | |
1634 | "(mii_bus:phy_addr=%s, id=%x)\n", | |
1635 | priv->phydev->drv->name, dev_name(&priv->phydev->dev), | |
1636 | priv->phydev->phy_id); | |
1637 | } else { | |
1638 | /* No PHY , fix the link, speed and duplex settings */ | |
1639 | dev_notice(emac_dev, "no phy, defaulting to 100/full\n"); | |
1640 | priv->link = 1; | |
1641 | priv->speed = SPEED_100; | |
1642 | priv->duplex = DUPLEX_FULL; | |
1643 | emac_update_phystatus(priv); | |
1644 | } | |
1645 | ||
1646 | if (!netif_running(ndev)) /* debug only - to avoid compiler warning */ | |
1647 | emac_dump_regs(priv); | |
1648 | ||
1649 | if (netif_msg_drv(priv)) | |
1650 | dev_notice(emac_dev, "DaVinci EMAC: Opened %s\n", ndev->name); | |
1651 | ||
1652 | if (priv->phydev) | |
1653 | phy_start(priv->phydev); | |
1654 | ||
1655 | return 0; | |
1656 | ||
1657 | err: | |
1658 | emac_int_disable(priv); | |
1659 | napi_disable(&priv->napi); | |
1660 | ||
1661 | rollback: | |
1662 | for (q = res_num; q >= 0; q--) { | |
1663 | res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, q); | |
1664 | /* at the first iteration, irq_num is already set to the | |
1665 | * right value | |
1666 | */ | |
1667 | if (q != res_num) | |
1668 | irq_num = res->end; | |
1669 | ||
1670 | for (m = irq_num; m >= res->start; m--) | |
1671 | free_irq(m, ndev); | |
1672 | } | |
1673 | cpdma_ctlr_stop(priv->dma); | |
1674 | pm_runtime_put(&priv->pdev->dev); | |
1675 | return ret; | |
1676 | } | |
1677 | ||
1678 | /** | |
1679 | * emac_dev_stop - EMAC device stop | |
1680 | * @ndev: The DaVinci EMAC network adapter | |
1681 | * | |
1682 | * Called when system wants to stop or down the interface. We stop the network | |
1683 | * queue, disable interrupts and cleanup TX/RX channels. | |
1684 | * | |
1685 | * We return the statistics in net_device_stats structure pulled from emac | |
1686 | */ | |
1687 | static int emac_dev_stop(struct net_device *ndev) | |
1688 | { | |
1689 | struct resource *res; | |
1690 | int i = 0; | |
1691 | int irq_num; | |
1692 | struct emac_priv *priv = netdev_priv(ndev); | |
1693 | struct device *emac_dev = &ndev->dev; | |
1694 | ||
1695 | /* inform the upper layers. */ | |
1696 | netif_stop_queue(ndev); | |
1697 | napi_disable(&priv->napi); | |
1698 | ||
1699 | netif_carrier_off(ndev); | |
1700 | emac_int_disable(priv); | |
1701 | cpdma_ctlr_stop(priv->dma); | |
1702 | emac_write(EMAC_SOFTRESET, 1); | |
1703 | ||
1704 | if (priv->phydev) | |
1705 | phy_disconnect(priv->phydev); | |
1706 | ||
1707 | /* Free IRQ */ | |
1708 | while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, i))) { | |
1709 | for (irq_num = res->start; irq_num <= res->end; irq_num++) | |
1710 | free_irq(irq_num, priv->ndev); | |
1711 | i++; | |
1712 | } | |
1713 | ||
1714 | if (netif_msg_drv(priv)) | |
1715 | dev_notice(emac_dev, "DaVinci EMAC: %s stopped\n", ndev->name); | |
1716 | ||
1717 | pm_runtime_put(&priv->pdev->dev); | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | /** | |
1722 | * emac_dev_getnetstats - EMAC get statistics function | |
1723 | * @ndev: The DaVinci EMAC network adapter | |
1724 | * | |
1725 | * Called when system wants to get statistics from the device. | |
1726 | * | |
1727 | * We return the statistics in net_device_stats structure pulled from emac | |
1728 | */ | |
1729 | static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev) | |
1730 | { | |
1731 | struct emac_priv *priv = netdev_priv(ndev); | |
1732 | u32 mac_control; | |
1733 | u32 stats_clear_mask; | |
1734 | int err; | |
1735 | ||
1736 | err = pm_runtime_get_sync(&priv->pdev->dev); | |
1737 | if (err < 0) { | |
1738 | pm_runtime_put_noidle(&priv->pdev->dev); | |
1739 | dev_err(&priv->pdev->dev, "%s: failed to get_sync(%d)\n", | |
1740 | __func__, err); | |
1741 | return &ndev->stats; | |
1742 | } | |
1743 | ||
1744 | /* update emac hardware stats and reset the registers*/ | |
1745 | ||
1746 | mac_control = emac_read(EMAC_MACCONTROL); | |
1747 | ||
1748 | if (mac_control & EMAC_MACCONTROL_GMIIEN) | |
1749 | stats_clear_mask = EMAC_STATS_CLR_MASK; | |
1750 | else | |
1751 | stats_clear_mask = 0; | |
1752 | ||
1753 | ndev->stats.multicast += emac_read(EMAC_RXMCASTFRAMES); | |
1754 | emac_write(EMAC_RXMCASTFRAMES, stats_clear_mask); | |
1755 | ||
1756 | ndev->stats.collisions += (emac_read(EMAC_TXCOLLISION) + | |
1757 | emac_read(EMAC_TXSINGLECOLL) + | |
1758 | emac_read(EMAC_TXMULTICOLL)); | |
1759 | emac_write(EMAC_TXCOLLISION, stats_clear_mask); | |
1760 | emac_write(EMAC_TXSINGLECOLL, stats_clear_mask); | |
1761 | emac_write(EMAC_TXMULTICOLL, stats_clear_mask); | |
1762 | ||
1763 | ndev->stats.rx_length_errors += (emac_read(EMAC_RXOVERSIZED) + | |
1764 | emac_read(EMAC_RXJABBER) + | |
1765 | emac_read(EMAC_RXUNDERSIZED)); | |
1766 | emac_write(EMAC_RXOVERSIZED, stats_clear_mask); | |
1767 | emac_write(EMAC_RXJABBER, stats_clear_mask); | |
1768 | emac_write(EMAC_RXUNDERSIZED, stats_clear_mask); | |
1769 | ||
1770 | ndev->stats.rx_over_errors += (emac_read(EMAC_RXSOFOVERRUNS) + | |
1771 | emac_read(EMAC_RXMOFOVERRUNS)); | |
1772 | emac_write(EMAC_RXSOFOVERRUNS, stats_clear_mask); | |
1773 | emac_write(EMAC_RXMOFOVERRUNS, stats_clear_mask); | |
1774 | ||
1775 | ndev->stats.rx_fifo_errors += emac_read(EMAC_RXDMAOVERRUNS); | |
1776 | emac_write(EMAC_RXDMAOVERRUNS, stats_clear_mask); | |
1777 | ||
1778 | ndev->stats.tx_carrier_errors += | |
1779 | emac_read(EMAC_TXCARRIERSENSE); | |
1780 | emac_write(EMAC_TXCARRIERSENSE, stats_clear_mask); | |
1781 | ||
1782 | ndev->stats.tx_fifo_errors += emac_read(EMAC_TXUNDERRUN); | |
1783 | emac_write(EMAC_TXUNDERRUN, stats_clear_mask); | |
1784 | ||
1785 | pm_runtime_put(&priv->pdev->dev); | |
1786 | ||
1787 | return &ndev->stats; | |
1788 | } | |
1789 | ||
1790 | static const struct net_device_ops emac_netdev_ops = { | |
1791 | .ndo_open = emac_dev_open, | |
1792 | .ndo_stop = emac_dev_stop, | |
1793 | .ndo_start_xmit = emac_dev_xmit, | |
1794 | .ndo_set_rx_mode = emac_dev_mcast_set, | |
1795 | .ndo_set_mac_address = emac_dev_setmac_addr, | |
1796 | .ndo_do_ioctl = emac_devioctl, | |
1797 | .ndo_tx_timeout = emac_dev_tx_timeout, | |
1798 | .ndo_get_stats = emac_dev_getnetstats, | |
1799 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1800 | .ndo_poll_controller = emac_poll_controller, | |
1801 | #endif | |
1802 | }; | |
1803 | ||
1804 | static const struct of_device_id davinci_emac_of_match[]; | |
1805 | ||
1806 | static struct emac_platform_data * | |
1807 | davinci_emac_of_get_pdata(struct platform_device *pdev, struct emac_priv *priv) | |
1808 | { | |
1809 | struct device_node *np; | |
1810 | const struct of_device_id *match; | |
1811 | const struct emac_platform_data *auxdata; | |
1812 | struct emac_platform_data *pdata = NULL; | |
1813 | const u8 *mac_addr; | |
1814 | ||
1815 | if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node) | |
1816 | return dev_get_platdata(&pdev->dev); | |
1817 | ||
1818 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
1819 | if (!pdata) | |
1820 | return NULL; | |
1821 | ||
1822 | np = pdev->dev.of_node; | |
1823 | pdata->version = EMAC_VERSION_2; | |
1824 | ||
1825 | if (!is_valid_ether_addr(pdata->mac_addr)) { | |
1826 | mac_addr = of_get_mac_address(np); | |
1827 | if (mac_addr) | |
1828 | memcpy(pdata->mac_addr, mac_addr, ETH_ALEN); | |
1829 | } | |
1830 | ||
1831 | of_property_read_u32(np, "ti,davinci-ctrl-reg-offset", | |
1832 | &pdata->ctrl_reg_offset); | |
1833 | ||
1834 | of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset", | |
1835 | &pdata->ctrl_mod_reg_offset); | |
1836 | ||
1837 | of_property_read_u32(np, "ti,davinci-ctrl-ram-offset", | |
1838 | &pdata->ctrl_ram_offset); | |
1839 | ||
1840 | of_property_read_u32(np, "ti,davinci-ctrl-ram-size", | |
1841 | &pdata->ctrl_ram_size); | |
1842 | ||
1843 | of_property_read_u8(np, "ti,davinci-rmii-en", &pdata->rmii_en); | |
1844 | ||
1845 | pdata->no_bd_ram = of_property_read_bool(np, "ti,davinci-no-bd-ram"); | |
1846 | ||
1847 | priv->phy_node = of_parse_phandle(np, "phy-handle", 0); | |
1848 | if (!priv->phy_node) | |
1849 | pdata->phy_id = NULL; | |
1850 | ||
1851 | auxdata = pdev->dev.platform_data; | |
1852 | if (auxdata) { | |
1853 | pdata->interrupt_enable = auxdata->interrupt_enable; | |
1854 | pdata->interrupt_disable = auxdata->interrupt_disable; | |
1855 | } | |
1856 | ||
1857 | match = of_match_device(davinci_emac_of_match, &pdev->dev); | |
1858 | if (match && match->data) { | |
1859 | auxdata = match->data; | |
1860 | pdata->version = auxdata->version; | |
1861 | pdata->hw_ram_addr = auxdata->hw_ram_addr; | |
1862 | } | |
1863 | ||
1864 | pdev->dev.platform_data = pdata; | |
1865 | ||
1866 | return pdata; | |
1867 | } | |
1868 | ||
1869 | /** | |
1870 | * davinci_emac_probe - EMAC device probe | |
1871 | * @pdev: The DaVinci EMAC device that we are removing | |
1872 | * | |
1873 | * Called when probing for emac devicesr. We get details of instances and | |
1874 | * resource information from platform init and register a network device | |
1875 | * and allocate resources necessary for driver to perform | |
1876 | */ | |
1877 | static int davinci_emac_probe(struct platform_device *pdev) | |
1878 | { | |
1879 | int rc = 0; | |
1880 | struct resource *res; | |
1881 | struct net_device *ndev; | |
1882 | struct emac_priv *priv; | |
1883 | unsigned long hw_ram_addr; | |
1884 | struct emac_platform_data *pdata; | |
1885 | struct cpdma_params dma_params; | |
1886 | struct clk *emac_clk; | |
1887 | unsigned long emac_bus_frequency; | |
1888 | ||
1889 | ||
1890 | /* obtain emac clock from kernel */ | |
1891 | emac_clk = devm_clk_get(&pdev->dev, NULL); | |
1892 | if (IS_ERR(emac_clk)) { | |
1893 | dev_err(&pdev->dev, "failed to get EMAC clock\n"); | |
1894 | return -EBUSY; | |
1895 | } | |
1896 | emac_bus_frequency = clk_get_rate(emac_clk); | |
1897 | devm_clk_put(&pdev->dev, emac_clk); | |
1898 | ||
1899 | /* TODO: Probe PHY here if possible */ | |
1900 | ||
1901 | ndev = alloc_etherdev(sizeof(struct emac_priv)); | |
1902 | if (!ndev) | |
1903 | return -ENOMEM; | |
1904 | ||
1905 | platform_set_drvdata(pdev, ndev); | |
1906 | priv = netdev_priv(ndev); | |
1907 | priv->pdev = pdev; | |
1908 | priv->ndev = ndev; | |
1909 | priv->msg_enable = netif_msg_init(debug_level, DAVINCI_EMAC_DEBUG); | |
1910 | ||
1911 | spin_lock_init(&priv->lock); | |
1912 | ||
1913 | pdata = davinci_emac_of_get_pdata(pdev, priv); | |
1914 | if (!pdata) { | |
1915 | dev_err(&pdev->dev, "no platform data\n"); | |
1916 | rc = -ENODEV; | |
1917 | goto no_pdata; | |
1918 | } | |
1919 | ||
1920 | /* MAC addr and PHY mask , RMII enable info from platform_data */ | |
1921 | memcpy(priv->mac_addr, pdata->mac_addr, ETH_ALEN); | |
1922 | priv->phy_id = pdata->phy_id; | |
1923 | priv->rmii_en = pdata->rmii_en; | |
1924 | priv->version = pdata->version; | |
1925 | priv->int_enable = pdata->interrupt_enable; | |
1926 | priv->int_disable = pdata->interrupt_disable; | |
1927 | ||
1928 | priv->coal_intvl = 0; | |
1929 | priv->bus_freq_mhz = (u32)(emac_bus_frequency / 1000000); | |
1930 | ||
1931 | /* Get EMAC platform data */ | |
1932 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1933 | priv->emac_base_phys = res->start + pdata->ctrl_reg_offset; | |
1934 | priv->remap_addr = devm_ioremap_resource(&pdev->dev, res); | |
1935 | if (IS_ERR(priv->remap_addr)) { | |
1936 | rc = PTR_ERR(priv->remap_addr); | |
1937 | goto no_pdata; | |
1938 | } | |
1939 | priv->emac_base = priv->remap_addr + pdata->ctrl_reg_offset; | |
1940 | ndev->base_addr = (unsigned long)priv->remap_addr; | |
1941 | ||
1942 | priv->ctrl_base = priv->remap_addr + pdata->ctrl_mod_reg_offset; | |
1943 | ||
1944 | hw_ram_addr = pdata->hw_ram_addr; | |
1945 | if (!hw_ram_addr) | |
1946 | hw_ram_addr = (u32 __force)res->start + pdata->ctrl_ram_offset; | |
1947 | ||
1948 | memset(&dma_params, 0, sizeof(dma_params)); | |
1949 | dma_params.dev = &pdev->dev; | |
1950 | dma_params.dmaregs = priv->emac_base; | |
1951 | dma_params.rxthresh = priv->emac_base + 0x120; | |
1952 | dma_params.rxfree = priv->emac_base + 0x140; | |
1953 | dma_params.txhdp = priv->emac_base + 0x600; | |
1954 | dma_params.rxhdp = priv->emac_base + 0x620; | |
1955 | dma_params.txcp = priv->emac_base + 0x640; | |
1956 | dma_params.rxcp = priv->emac_base + 0x660; | |
1957 | dma_params.num_chan = EMAC_MAX_TXRX_CHANNELS; | |
1958 | dma_params.min_packet_size = EMAC_DEF_MIN_ETHPKTSIZE; | |
1959 | dma_params.desc_hw_addr = hw_ram_addr; | |
1960 | dma_params.desc_mem_size = pdata->ctrl_ram_size; | |
1961 | dma_params.desc_align = 16; | |
1962 | ||
1963 | dma_params.desc_mem_phys = pdata->no_bd_ram ? 0 : | |
1964 | (u32 __force)res->start + pdata->ctrl_ram_offset; | |
1965 | ||
1966 | priv->dma = cpdma_ctlr_create(&dma_params); | |
1967 | if (!priv->dma) { | |
1968 | dev_err(&pdev->dev, "error initializing DMA\n"); | |
1969 | rc = -ENOMEM; | |
1970 | goto no_pdata; | |
1971 | } | |
1972 | ||
1973 | priv->txchan = cpdma_chan_create(priv->dma, tx_chan_num(EMAC_DEF_TX_CH), | |
1974 | emac_tx_handler); | |
1975 | priv->rxchan = cpdma_chan_create(priv->dma, rx_chan_num(EMAC_DEF_RX_CH), | |
1976 | emac_rx_handler); | |
1977 | if (WARN_ON(!priv->txchan || !priv->rxchan)) { | |
1978 | rc = -ENOMEM; | |
1979 | goto no_cpdma_chan; | |
1980 | } | |
1981 | ||
1982 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1983 | if (!res) { | |
1984 | dev_err(&pdev->dev, "error getting irq res\n"); | |
1985 | rc = -ENOENT; | |
1986 | goto no_cpdma_chan; | |
1987 | } | |
1988 | ndev->irq = res->start; | |
1989 | ||
1990 | if (!is_valid_ether_addr(priv->mac_addr)) { | |
1991 | /* Use random MAC if none passed */ | |
1992 | eth_hw_addr_random(ndev); | |
1993 | memcpy(priv->mac_addr, ndev->dev_addr, ndev->addr_len); | |
1994 | dev_warn(&pdev->dev, "using random MAC addr: %pM\n", | |
1995 | priv->mac_addr); | |
1996 | } | |
1997 | ||
1998 | ndev->netdev_ops = &emac_netdev_ops; | |
1999 | ndev->ethtool_ops = ðtool_ops; | |
2000 | netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT); | |
2001 | ||
2002 | pm_runtime_enable(&pdev->dev); | |
2003 | rc = pm_runtime_get_sync(&pdev->dev); | |
2004 | if (rc < 0) { | |
2005 | pm_runtime_put_noidle(&pdev->dev); | |
2006 | dev_err(&pdev->dev, "%s: failed to get_sync(%d)\n", | |
2007 | __func__, rc); | |
2008 | goto no_cpdma_chan; | |
2009 | } | |
2010 | ||
2011 | /* register the network device */ | |
2012 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
2013 | rc = register_netdev(ndev); | |
2014 | if (rc) { | |
2015 | dev_err(&pdev->dev, "error in register_netdev\n"); | |
2016 | rc = -ENODEV; | |
2017 | pm_runtime_put(&pdev->dev); | |
2018 | goto no_cpdma_chan; | |
2019 | } | |
2020 | ||
2021 | ||
2022 | if (netif_msg_probe(priv)) { | |
2023 | dev_notice(&pdev->dev, "DaVinci EMAC Probe found device " | |
2024 | "(regs: %p, irq: %d)\n", | |
2025 | (void *)priv->emac_base_phys, ndev->irq); | |
2026 | } | |
2027 | pm_runtime_put(&pdev->dev); | |
2028 | ||
2029 | return 0; | |
2030 | ||
2031 | no_cpdma_chan: | |
2032 | if (priv->txchan) | |
2033 | cpdma_chan_destroy(priv->txchan); | |
2034 | if (priv->rxchan) | |
2035 | cpdma_chan_destroy(priv->rxchan); | |
2036 | cpdma_ctlr_destroy(priv->dma); | |
2037 | no_pdata: | |
2038 | free_netdev(ndev); | |
2039 | return rc; | |
2040 | } | |
2041 | ||
2042 | /** | |
2043 | * davinci_emac_remove - EMAC device remove | |
2044 | * @pdev: The DaVinci EMAC device that we are removing | |
2045 | * | |
2046 | * Called when removing the device driver. We disable clock usage and release | |
2047 | * the resources taken up by the driver and unregister network device | |
2048 | */ | |
2049 | static int davinci_emac_remove(struct platform_device *pdev) | |
2050 | { | |
2051 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2052 | struct emac_priv *priv = netdev_priv(ndev); | |
2053 | ||
2054 | dev_notice(&ndev->dev, "DaVinci EMAC: davinci_emac_remove()\n"); | |
2055 | ||
2056 | if (priv->txchan) | |
2057 | cpdma_chan_destroy(priv->txchan); | |
2058 | if (priv->rxchan) | |
2059 | cpdma_chan_destroy(priv->rxchan); | |
2060 | cpdma_ctlr_destroy(priv->dma); | |
2061 | ||
2062 | unregister_netdev(ndev); | |
2063 | free_netdev(ndev); | |
2064 | ||
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | static int davinci_emac_suspend(struct device *dev) | |
2069 | { | |
2070 | struct platform_device *pdev = to_platform_device(dev); | |
2071 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2072 | ||
2073 | if (netif_running(ndev)) | |
2074 | emac_dev_stop(ndev); | |
2075 | ||
2076 | return 0; | |
2077 | } | |
2078 | ||
2079 | static int davinci_emac_resume(struct device *dev) | |
2080 | { | |
2081 | struct platform_device *pdev = to_platform_device(dev); | |
2082 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2083 | ||
2084 | if (netif_running(ndev)) | |
2085 | emac_dev_open(ndev); | |
2086 | ||
2087 | return 0; | |
2088 | } | |
2089 | ||
2090 | static const struct dev_pm_ops davinci_emac_pm_ops = { | |
2091 | .suspend = davinci_emac_suspend, | |
2092 | .resume = davinci_emac_resume, | |
2093 | }; | |
2094 | ||
2095 | #if IS_ENABLED(CONFIG_OF) | |
2096 | static const struct emac_platform_data am3517_emac_data = { | |
2097 | .version = EMAC_VERSION_2, | |
2098 | .hw_ram_addr = 0x01e20000, | |
2099 | }; | |
2100 | ||
2101 | static const struct of_device_id davinci_emac_of_match[] = { | |
2102 | {.compatible = "ti,davinci-dm6467-emac", }, | |
2103 | {.compatible = "ti,am3517-emac", .data = &am3517_emac_data, }, | |
2104 | {}, | |
2105 | }; | |
2106 | MODULE_DEVICE_TABLE(of, davinci_emac_of_match); | |
2107 | #endif | |
2108 | ||
2109 | /* davinci_emac_driver: EMAC platform driver structure */ | |
2110 | static struct platform_driver davinci_emac_driver = { | |
2111 | .driver = { | |
2112 | .name = "davinci_emac", | |
2113 | .pm = &davinci_emac_pm_ops, | |
2114 | .of_match_table = of_match_ptr(davinci_emac_of_match), | |
2115 | }, | |
2116 | .probe = davinci_emac_probe, | |
2117 | .remove = davinci_emac_remove, | |
2118 | }; | |
2119 | ||
2120 | /** | |
2121 | * davinci_emac_init - EMAC driver module init | |
2122 | * | |
2123 | * Called when initializing the driver. We register the driver with | |
2124 | * the platform. | |
2125 | */ | |
2126 | static int __init davinci_emac_init(void) | |
2127 | { | |
2128 | return platform_driver_register(&davinci_emac_driver); | |
2129 | } | |
2130 | late_initcall(davinci_emac_init); | |
2131 | ||
2132 | /** | |
2133 | * davinci_emac_exit - EMAC driver module exit | |
2134 | * | |
2135 | * Called when exiting the driver completely. We unregister the driver with | |
2136 | * the platform and exit | |
2137 | */ | |
2138 | static void __exit davinci_emac_exit(void) | |
2139 | { | |
2140 | platform_driver_unregister(&davinci_emac_driver); | |
2141 | } | |
2142 | module_exit(davinci_emac_exit); | |
2143 | ||
2144 | MODULE_LICENSE("GPL"); | |
2145 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Anant Gole <anantgole@ti.com>"); | |
2146 | MODULE_AUTHOR("DaVinci EMAC Maintainer: Chaithrika U S <chaithrika@ti.com>"); | |
2147 | MODULE_DESCRIPTION("DaVinci EMAC Ethernet driver"); |