2 * DaVinci Ethernet Medium Access Controller
4 * DaVinci EMAC is based upon CPPI 3.0 TI DMA engine
6 * Copyright (C) 2009 Texas Instruments.
8 * ---------------------------------------------------------------------------
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.
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.
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 * ---------------------------------------------------------------------------
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,
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>
39 #include <linux/ioport.h>
40 #include <linux/slab.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>
59 #include <linux/uaccess.h>
60 #include <linux/pm_runtime.h>
61 #include <linux/davinci_emac.h>
63 #include <linux/of_address.h>
64 #include <linux/of_irq.h>
65 #include <linux/of_net.h>
70 #include "davinci_cpdma.h"
72 static int debug_level;
73 module_param(debug_level, int, 0);
74 MODULE_PARM_DESC(debug_level, "DaVinci EMAC debug level (NETIF_MSG bits)");
76 /* Netif debug messages possible */
77 #define DAVINCI_EMAC_DEBUG (NETIF_MSG_DRV | \
85 NETIF_MSG_TX_QUEUED | \
88 NETIF_MSG_RX_STATUS | \
94 #define EMAC_MAJOR_VERSION 6
95 #define EMAC_MINOR_VERSION 1
96 #define EMAC_MODULE_VERSION "6.1"
97 MODULE_VERSION(EMAC_MODULE_VERSION);
98 static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1";
100 /* Configuration items */
101 #define EMAC_DEF_PASS_CRC (0) /* Do not pass CRC up to frames */
102 #define EMAC_DEF_QOS_EN (0) /* EMAC proprietary QoS disabled */
103 #define EMAC_DEF_NO_BUFF_CHAIN (0) /* No buffer chain */
104 #define EMAC_DEF_MACCTRL_FRAME_EN (0) /* Discard Maccontrol frames */
105 #define EMAC_DEF_SHORT_FRAME_EN (0) /* Discard short frames */
106 #define EMAC_DEF_ERROR_FRAME_EN (0) /* Discard error frames */
107 #define EMAC_DEF_PROM_EN (0) /* Promiscuous disabled */
108 #define EMAC_DEF_PROM_CH (0) /* Promiscuous channel is 0 */
109 #define EMAC_DEF_BCAST_EN (1) /* Broadcast enabled */
110 #define EMAC_DEF_BCAST_CH (0) /* Broadcast channel is 0 */
111 #define EMAC_DEF_MCAST_EN (1) /* Multicast enabled */
112 #define EMAC_DEF_MCAST_CH (0) /* Multicast channel is 0 */
114 #define EMAC_DEF_TXPRIO_FIXED (1) /* TX Priority is fixed */
115 #define EMAC_DEF_TXPACING_EN (0) /* TX pacing NOT supported*/
117 #define EMAC_DEF_BUFFER_OFFSET (0) /* Buffer offset to DMA (future) */
118 #define EMAC_DEF_MIN_ETHPKTSIZE (60) /* Minimum ethernet pkt size */
119 #define EMAC_DEF_MAX_FRAME_SIZE (1500 + 14 + 4 + 4)
120 #define EMAC_DEF_TX_CH (0) /* Default 0th channel */
121 #define EMAC_DEF_RX_CH (0) /* Default 0th channel */
122 #define EMAC_DEF_RX_NUM_DESC (128)
123 #define EMAC_DEF_MAX_TX_CH (1) /* Max TX channels configured */
124 #define EMAC_DEF_MAX_RX_CH (1) /* Max RX channels configured */
125 #define EMAC_POLL_WEIGHT (64) /* Default NAPI poll weight */
127 /* Buffer descriptor parameters */
128 #define EMAC_DEF_TX_MAX_SERVICE (32) /* TX max service BD's */
129 #define EMAC_DEF_RX_MAX_SERVICE (64) /* should = netdev->weight */
131 /* EMAC register related defines */
132 #define EMAC_ALL_MULTI_REG_VALUE (0xFFFFFFFF)
133 #define EMAC_NUM_MULTICAST_BITS (64)
134 #define EMAC_TX_CONTROL_TX_ENABLE_VAL (0x1)
135 #define EMAC_RX_CONTROL_RX_ENABLE_VAL (0x1)
136 #define EMAC_MAC_HOST_ERR_INTMASK_VAL (0x2)
137 #define EMAC_RX_UNICAST_CLEAR_ALL (0xFF)
138 #define EMAC_INT_MASK_CLEAR (0xFF)
140 /* RX MBP register bit positions */
141 #define EMAC_RXMBP_PASSCRC_MASK BIT(30)
142 #define EMAC_RXMBP_QOSEN_MASK BIT(29)
143 #define EMAC_RXMBP_NOCHAIN_MASK BIT(28)
144 #define EMAC_RXMBP_CMFEN_MASK BIT(24)
145 #define EMAC_RXMBP_CSFEN_MASK BIT(23)
146 #define EMAC_RXMBP_CEFEN_MASK BIT(22)
147 #define EMAC_RXMBP_CAFEN_MASK BIT(21)
148 #define EMAC_RXMBP_PROMCH_SHIFT (16)
149 #define EMAC_RXMBP_PROMCH_MASK (0x7 << 16)
150 #define EMAC_RXMBP_BROADEN_MASK BIT(13)
151 #define EMAC_RXMBP_BROADCH_SHIFT (8)
152 #define EMAC_RXMBP_BROADCH_MASK (0x7 << 8)
153 #define EMAC_RXMBP_MULTIEN_MASK BIT(5)
154 #define EMAC_RXMBP_MULTICH_SHIFT (0)
155 #define EMAC_RXMBP_MULTICH_MASK (0x7)
156 #define EMAC_RXMBP_CHMASK (0x7)
158 /* EMAC register definitions/bit maps used */
159 # define EMAC_MBP_RXPROMISC (0x00200000)
160 # define EMAC_MBP_PROMISCCH(ch) (((ch) & 0x7) << 16)
161 # define EMAC_MBP_RXBCAST (0x00002000)
162 # define EMAC_MBP_BCASTCHAN(ch) (((ch) & 0x7) << 8)
163 # define EMAC_MBP_RXMCAST (0x00000020)
164 # define EMAC_MBP_MCASTCHAN(ch) ((ch) & 0x7)
166 /* EMAC mac_control register */
167 #define EMAC_MACCONTROL_TXPTYPE BIT(9)
168 #define EMAC_MACCONTROL_TXPACEEN BIT(6)
169 #define EMAC_MACCONTROL_GMIIEN BIT(5)
170 #define EMAC_MACCONTROL_GIGABITEN BIT(7)
171 #define EMAC_MACCONTROL_FULLDUPLEXEN BIT(0)
172 #define EMAC_MACCONTROL_RMIISPEED_MASK BIT(15)
174 /* GIGABIT MODE related bits */
175 #define EMAC_DM646X_MACCONTORL_GIG BIT(7)
176 #define EMAC_DM646X_MACCONTORL_GIGFORCE BIT(17)
178 /* EMAC mac_status register */
179 #define EMAC_MACSTATUS_TXERRCODE_MASK (0xF00000)
180 #define EMAC_MACSTATUS_TXERRCODE_SHIFT (20)
181 #define EMAC_MACSTATUS_TXERRCH_MASK (0x7)
182 #define EMAC_MACSTATUS_TXERRCH_SHIFT (16)
183 #define EMAC_MACSTATUS_RXERRCODE_MASK (0xF000)
184 #define EMAC_MACSTATUS_RXERRCODE_SHIFT (12)
185 #define EMAC_MACSTATUS_RXERRCH_MASK (0x7)
186 #define EMAC_MACSTATUS_RXERRCH_SHIFT (8)
188 /* EMAC RX register masks */
189 #define EMAC_RX_MAX_LEN_MASK (0xFFFF)
190 #define EMAC_RX_BUFFER_OFFSET_MASK (0xFFFF)
192 /* MAC_IN_VECTOR (0x180) register bit fields */
193 #define EMAC_DM644X_MAC_IN_VECTOR_HOST_INT BIT(17)
194 #define EMAC_DM644X_MAC_IN_VECTOR_STATPEND_INT BIT(16)
195 #define EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC BIT(8)
196 #define EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC BIT(0)
198 /** NOTE:: For DM646x the IN_VECTOR has changed */
199 #define EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC BIT(EMAC_DEF_RX_CH)
200 #define EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC BIT(16 + EMAC_DEF_TX_CH)
201 #define EMAC_DM646X_MAC_IN_VECTOR_HOST_INT BIT(26)
202 #define EMAC_DM646X_MAC_IN_VECTOR_STATPEND_INT BIT(27)
204 /* CPPI bit positions */
205 #define EMAC_CPPI_SOP_BIT BIT(31)
206 #define EMAC_CPPI_EOP_BIT BIT(30)
207 #define EMAC_CPPI_OWNERSHIP_BIT BIT(29)
208 #define EMAC_CPPI_EOQ_BIT BIT(28)
209 #define EMAC_CPPI_TEARDOWN_COMPLETE_BIT BIT(27)
210 #define EMAC_CPPI_PASS_CRC_BIT BIT(26)
211 #define EMAC_RX_BD_BUF_SIZE (0xFFFF)
212 #define EMAC_BD_LENGTH_FOR_CACHE (16) /* only CPPI bytes */
213 #define EMAC_RX_BD_PKT_LENGTH_MASK (0xFFFF)
215 /* Max hardware defines */
216 #define EMAC_MAX_TXRX_CHANNELS (8) /* Max hardware channels */
217 #define EMAC_DEF_MAX_MULTICAST_ADDRESSES (64) /* Max mcast addr's */
219 /* EMAC Peripheral Device Register Memory Layout structure */
220 #define EMAC_MACINVECTOR 0x90
222 #define EMAC_DM646X_MACEOIVECTOR 0x94
224 #define EMAC_MACINTSTATRAW 0xB0
225 #define EMAC_MACINTSTATMASKED 0xB4
226 #define EMAC_MACINTMASKSET 0xB8
227 #define EMAC_MACINTMASKCLEAR 0xBC
229 #define EMAC_RXMBPENABLE 0x100
230 #define EMAC_RXUNICASTSET 0x104
231 #define EMAC_RXUNICASTCLEAR 0x108
232 #define EMAC_RXMAXLEN 0x10C
233 #define EMAC_RXBUFFEROFFSET 0x110
234 #define EMAC_RXFILTERLOWTHRESH 0x114
236 #define EMAC_MACCONTROL 0x160
237 #define EMAC_MACSTATUS 0x164
238 #define EMAC_EMCONTROL 0x168
239 #define EMAC_FIFOCONTROL 0x16C
240 #define EMAC_MACCONFIG 0x170
241 #define EMAC_SOFTRESET 0x174
242 #define EMAC_MACSRCADDRLO 0x1D0
243 #define EMAC_MACSRCADDRHI 0x1D4
244 #define EMAC_MACHASH1 0x1D8
245 #define EMAC_MACHASH2 0x1DC
246 #define EMAC_MACADDRLO 0x500
247 #define EMAC_MACADDRHI 0x504
248 #define EMAC_MACINDEX 0x508
250 /* EMAC statistics registers */
251 #define EMAC_RXGOODFRAMES 0x200
252 #define EMAC_RXBCASTFRAMES 0x204
253 #define EMAC_RXMCASTFRAMES 0x208
254 #define EMAC_RXPAUSEFRAMES 0x20C
255 #define EMAC_RXCRCERRORS 0x210
256 #define EMAC_RXALIGNCODEERRORS 0x214
257 #define EMAC_RXOVERSIZED 0x218
258 #define EMAC_RXJABBER 0x21C
259 #define EMAC_RXUNDERSIZED 0x220
260 #define EMAC_RXFRAGMENTS 0x224
261 #define EMAC_RXFILTERED 0x228
262 #define EMAC_RXQOSFILTERED 0x22C
263 #define EMAC_RXOCTETS 0x230
264 #define EMAC_TXGOODFRAMES 0x234
265 #define EMAC_TXBCASTFRAMES 0x238
266 #define EMAC_TXMCASTFRAMES 0x23C
267 #define EMAC_TXPAUSEFRAMES 0x240
268 #define EMAC_TXDEFERRED 0x244
269 #define EMAC_TXCOLLISION 0x248
270 #define EMAC_TXSINGLECOLL 0x24C
271 #define EMAC_TXMULTICOLL 0x250
272 #define EMAC_TXEXCESSIVECOLL 0x254
273 #define EMAC_TXLATECOLL 0x258
274 #define EMAC_TXUNDERRUN 0x25C
275 #define EMAC_TXCARRIERSENSE 0x260
276 #define EMAC_TXOCTETS 0x264
277 #define EMAC_NETOCTETS 0x280
278 #define EMAC_RXSOFOVERRUNS 0x284
279 #define EMAC_RXMOFOVERRUNS 0x288
280 #define EMAC_RXDMAOVERRUNS 0x28C
282 /* EMAC DM644x control registers */
283 #define EMAC_CTRL_EWCTL (0x4)
284 #define EMAC_CTRL_EWINTTCNT (0x8)
286 /* EMAC DM644x control module masks */
287 #define EMAC_DM644X_EWINTCNT_MASK 0x1FFFF
288 #define EMAC_DM644X_INTMIN_INTVL 0x1
289 #define EMAC_DM644X_INTMAX_INTVL (EMAC_DM644X_EWINTCNT_MASK)
291 /* EMAC DM646X control module registers */
292 #define EMAC_DM646X_CMINTCTRL 0x0C
293 #define EMAC_DM646X_CMRXINTEN 0x14
294 #define EMAC_DM646X_CMTXINTEN 0x18
295 #define EMAC_DM646X_CMRXINTMAX 0x70
296 #define EMAC_DM646X_CMTXINTMAX 0x74
298 /* EMAC DM646X control module masks */
299 #define EMAC_DM646X_INTPACEEN (0x3 << 16)
300 #define EMAC_DM646X_INTPRESCALE_MASK (0x7FF << 0)
301 #define EMAC_DM646X_CMINTMAX_CNT 63
302 #define EMAC_DM646X_CMINTMIN_CNT 2
303 #define EMAC_DM646X_CMINTMAX_INTVL (1000 / EMAC_DM646X_CMINTMIN_CNT)
304 #define EMAC_DM646X_CMINTMIN_INTVL ((1000 / EMAC_DM646X_CMINTMAX_CNT) + 1)
307 /* EMAC EOI codes for C0 */
308 #define EMAC_DM646X_MAC_EOI_C0_RXEN (0x01)
309 #define EMAC_DM646X_MAC_EOI_C0_TXEN (0x02)
311 /* EMAC Stats Clear Mask */
312 #define EMAC_STATS_CLR_MASK (0xFFFFFFFF)
314 /* emac_priv: EMAC private data structure
316 * EMAC adapter private data structure
320 struct net_device *ndev;
321 struct platform_device *pdev;
322 struct napi_struct napi;
324 void __iomem *remap_addr;
326 void __iomem *emac_base;
327 void __iomem *ctrl_base;
328 struct cpdma_ctlr *dma;
329 struct cpdma_chan *txchan;
330 struct cpdma_chan *rxchan;
331 u32 link; /* 1=link on, 0=link off */
332 u32 speed; /* 0=Auto Neg, 1=No PHY, 10,100, 1000 - mbps */
333 u32 duplex; /* Link duplex: 0=Half, 1=Full */
342 u32 multicast_hash_cnt[EMAC_NUM_MULTICAST_BITS];
346 struct device_node *phy_node;
348 struct phy_device *phydev;
350 /*platform specific members*/
351 void (*int_enable) (void);
352 void (*int_disable) (void);
355 /* EMAC TX Host Error description strings */
356 static char *emac_txhost_errcodes[16] = {
357 "No error", "SOP error", "Ownership bit not set in SOP buffer",
358 "Zero Next Buffer Descriptor Pointer Without EOP",
359 "Zero Buffer Pointer", "Zero Buffer Length", "Packet Length Error",
360 "Reserved", "Reserved", "Reserved", "Reserved", "Reserved",
361 "Reserved", "Reserved", "Reserved", "Reserved"
364 /* EMAC RX Host Error description strings */
365 static char *emac_rxhost_errcodes[16] = {
366 "No error", "Reserved", "Ownership bit not set in input buffer",
367 "Reserved", "Zero Buffer Pointer", "Reserved", "Reserved",
368 "Reserved", "Reserved", "Reserved", "Reserved", "Reserved",
369 "Reserved", "Reserved", "Reserved", "Reserved"
373 #define emac_read(reg) ioread32(priv->emac_base + (reg))
374 #define emac_write(reg, val) iowrite32(val, priv->emac_base + (reg))
376 #define emac_ctrl_read(reg) ioread32((priv->ctrl_base + (reg)))
377 #define emac_ctrl_write(reg, val) iowrite32(val, (priv->ctrl_base + (reg)))
380 * emac_dump_regs - Dump important EMAC registers to debug terminal
381 * @priv: The DaVinci EMAC private adapter structure
383 * Executes ethtool set cmd & sets phy mode
386 static void emac_dump_regs(struct emac_priv *priv)
388 struct device *emac_dev = &priv->ndev->dev;
390 /* Print important registers in EMAC */
391 dev_info(emac_dev, "EMAC Basic registers\n");
392 if (priv->version == EMAC_VERSION_1) {
393 dev_info(emac_dev, "EMAC: EWCTL: %08X, EWINTTCNT: %08X\n",
394 emac_ctrl_read(EMAC_CTRL_EWCTL),
395 emac_ctrl_read(EMAC_CTRL_EWINTTCNT));
397 dev_info(emac_dev, "EMAC: EmuControl:%08X, FifoControl: %08X\n",
398 emac_read(EMAC_EMCONTROL), emac_read(EMAC_FIFOCONTROL));
399 dev_info(emac_dev, "EMAC: MBPEnable:%08X, RXUnicastSet: %08X, "\
400 "RXMaxLen=%08X\n", emac_read(EMAC_RXMBPENABLE),
401 emac_read(EMAC_RXUNICASTSET), emac_read(EMAC_RXMAXLEN));
402 dev_info(emac_dev, "EMAC: MacControl:%08X, MacStatus: %08X, "\
403 "MacConfig=%08X\n", emac_read(EMAC_MACCONTROL),
404 emac_read(EMAC_MACSTATUS), emac_read(EMAC_MACCONFIG));
405 dev_info(emac_dev, "EMAC Statistics\n");
406 dev_info(emac_dev, "EMAC: rx_good_frames:%d\n",
407 emac_read(EMAC_RXGOODFRAMES));
408 dev_info(emac_dev, "EMAC: rx_broadcast_frames:%d\n",
409 emac_read(EMAC_RXBCASTFRAMES));
410 dev_info(emac_dev, "EMAC: rx_multicast_frames:%d\n",
411 emac_read(EMAC_RXMCASTFRAMES));
412 dev_info(emac_dev, "EMAC: rx_pause_frames:%d\n",
413 emac_read(EMAC_RXPAUSEFRAMES));
414 dev_info(emac_dev, "EMAC: rx_crcerrors:%d\n",
415 emac_read(EMAC_RXCRCERRORS));
416 dev_info(emac_dev, "EMAC: rx_align_code_errors:%d\n",
417 emac_read(EMAC_RXALIGNCODEERRORS));
418 dev_info(emac_dev, "EMAC: rx_oversized_frames:%d\n",
419 emac_read(EMAC_RXOVERSIZED));
420 dev_info(emac_dev, "EMAC: rx_jabber_frames:%d\n",
421 emac_read(EMAC_RXJABBER));
422 dev_info(emac_dev, "EMAC: rx_undersized_frames:%d\n",
423 emac_read(EMAC_RXUNDERSIZED));
424 dev_info(emac_dev, "EMAC: rx_fragments:%d\n",
425 emac_read(EMAC_RXFRAGMENTS));
426 dev_info(emac_dev, "EMAC: rx_filtered_frames:%d\n",
427 emac_read(EMAC_RXFILTERED));
428 dev_info(emac_dev, "EMAC: rx_qos_filtered_frames:%d\n",
429 emac_read(EMAC_RXQOSFILTERED));
430 dev_info(emac_dev, "EMAC: rx_octets:%d\n",
431 emac_read(EMAC_RXOCTETS));
432 dev_info(emac_dev, "EMAC: tx_goodframes:%d\n",
433 emac_read(EMAC_TXGOODFRAMES));
434 dev_info(emac_dev, "EMAC: tx_bcastframes:%d\n",
435 emac_read(EMAC_TXBCASTFRAMES));
436 dev_info(emac_dev, "EMAC: tx_mcastframes:%d\n",
437 emac_read(EMAC_TXMCASTFRAMES));
438 dev_info(emac_dev, "EMAC: tx_pause_frames:%d\n",
439 emac_read(EMAC_TXPAUSEFRAMES));
440 dev_info(emac_dev, "EMAC: tx_deferred_frames:%d\n",
441 emac_read(EMAC_TXDEFERRED));
442 dev_info(emac_dev, "EMAC: tx_collision_frames:%d\n",
443 emac_read(EMAC_TXCOLLISION));
444 dev_info(emac_dev, "EMAC: tx_single_coll_frames:%d\n",
445 emac_read(EMAC_TXSINGLECOLL));
446 dev_info(emac_dev, "EMAC: tx_mult_coll_frames:%d\n",
447 emac_read(EMAC_TXMULTICOLL));
448 dev_info(emac_dev, "EMAC: tx_excessive_collisions:%d\n",
449 emac_read(EMAC_TXEXCESSIVECOLL));
450 dev_info(emac_dev, "EMAC: tx_late_collisions:%d\n",
451 emac_read(EMAC_TXLATECOLL));
452 dev_info(emac_dev, "EMAC: tx_underrun:%d\n",
453 emac_read(EMAC_TXUNDERRUN));
454 dev_info(emac_dev, "EMAC: tx_carrier_sense_errors:%d\n",
455 emac_read(EMAC_TXCARRIERSENSE));
456 dev_info(emac_dev, "EMAC: tx_octets:%d\n",
457 emac_read(EMAC_TXOCTETS));
458 dev_info(emac_dev, "EMAC: net_octets:%d\n",
459 emac_read(EMAC_NETOCTETS));
460 dev_info(emac_dev, "EMAC: rx_sof_overruns:%d\n",
461 emac_read(EMAC_RXSOFOVERRUNS));
462 dev_info(emac_dev, "EMAC: rx_mof_overruns:%d\n",
463 emac_read(EMAC_RXMOFOVERRUNS));
464 dev_info(emac_dev, "EMAC: rx_dma_overruns:%d\n",
465 emac_read(EMAC_RXDMAOVERRUNS));
467 cpdma_ctlr_dump(priv->dma);
471 * emac_get_drvinfo - Get EMAC driver information
472 * @ndev: The DaVinci EMAC network adapter
473 * @info: ethtool info structure containing name and version
475 * Returns EMAC driver information (name and version)
478 static void emac_get_drvinfo(struct net_device *ndev,
479 struct ethtool_drvinfo *info)
481 strlcpy(info->driver, emac_version_string, sizeof(info->driver));
482 strlcpy(info->version, EMAC_MODULE_VERSION, sizeof(info->version));
486 * emac_get_settings - Get EMAC settings
487 * @ndev: The DaVinci EMAC network adapter
488 * @ecmd: ethtool command
490 * Executes ethool get command
493 static int emac_get_settings(struct net_device *ndev,
494 struct ethtool_cmd *ecmd)
496 struct emac_priv *priv = netdev_priv(ndev);
498 return phy_ethtool_gset(priv->phydev, ecmd);
505 * emac_set_settings - Set EMAC settings
506 * @ndev: The DaVinci EMAC network adapter
507 * @ecmd: ethtool command
509 * Executes ethool set command
512 static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
514 struct emac_priv *priv = netdev_priv(ndev);
516 return phy_ethtool_sset(priv->phydev, ecmd);
523 * emac_get_coalesce - Get interrupt coalesce settings for this device
524 * @ndev : The DaVinci EMAC network adapter
525 * @coal : ethtool coalesce settings structure
527 * Fetch the current interrupt coalesce settings
530 static int emac_get_coalesce(struct net_device *ndev,
531 struct ethtool_coalesce *coal)
533 struct emac_priv *priv = netdev_priv(ndev);
535 coal->rx_coalesce_usecs = priv->coal_intvl;
541 * emac_set_coalesce - Set interrupt coalesce settings for this device
542 * @ndev : The DaVinci EMAC network adapter
543 * @coal : ethtool coalesce settings structure
545 * Set interrupt coalesce parameters
548 static int emac_set_coalesce(struct net_device *ndev,
549 struct ethtool_coalesce *coal)
551 struct emac_priv *priv = netdev_priv(ndev);
552 u32 int_ctrl, num_interrupts = 0;
553 u32 prescale = 0, addnl_dvdr = 1, coal_intvl = 0;
555 if (!coal->rx_coalesce_usecs)
558 coal_intvl = coal->rx_coalesce_usecs;
560 switch (priv->version) {
562 int_ctrl = emac_ctrl_read(EMAC_DM646X_CMINTCTRL);
563 prescale = priv->bus_freq_mhz * 4;
565 if (coal_intvl < EMAC_DM646X_CMINTMIN_INTVL)
566 coal_intvl = EMAC_DM646X_CMINTMIN_INTVL;
568 if (coal_intvl > EMAC_DM646X_CMINTMAX_INTVL) {
570 * Interrupt pacer works with 4us Pulse, we can
571 * throttle further by dilating the 4us pulse.
573 addnl_dvdr = EMAC_DM646X_INTPRESCALE_MASK / prescale;
575 if (addnl_dvdr > 1) {
576 prescale *= addnl_dvdr;
577 if (coal_intvl > (EMAC_DM646X_CMINTMAX_INTVL
579 coal_intvl = (EMAC_DM646X_CMINTMAX_INTVL
583 coal_intvl = EMAC_DM646X_CMINTMAX_INTVL;
587 num_interrupts = (1000 * addnl_dvdr) / coal_intvl;
589 int_ctrl |= EMAC_DM646X_INTPACEEN;
590 int_ctrl &= (~EMAC_DM646X_INTPRESCALE_MASK);
591 int_ctrl |= (prescale & EMAC_DM646X_INTPRESCALE_MASK);
592 emac_ctrl_write(EMAC_DM646X_CMINTCTRL, int_ctrl);
594 emac_ctrl_write(EMAC_DM646X_CMRXINTMAX, num_interrupts);
595 emac_ctrl_write(EMAC_DM646X_CMTXINTMAX, num_interrupts);
599 int_ctrl = emac_ctrl_read(EMAC_CTRL_EWINTTCNT);
600 int_ctrl &= (~EMAC_DM644X_EWINTCNT_MASK);
601 prescale = coal_intvl * priv->bus_freq_mhz;
602 if (prescale > EMAC_DM644X_EWINTCNT_MASK) {
603 prescale = EMAC_DM644X_EWINTCNT_MASK;
604 coal_intvl = prescale / priv->bus_freq_mhz;
606 emac_ctrl_write(EMAC_CTRL_EWINTTCNT, (int_ctrl | prescale));
611 printk(KERN_INFO"Set coalesce to %d usecs.\n", coal_intvl);
612 priv->coal_intvl = coal_intvl;
619 /* ethtool_ops: DaVinci EMAC Ethtool structure
621 * Ethtool support for EMAC adapter
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,
634 * emac_update_phystatus - Update Phy status
635 * @priv: The DaVinci EMAC private adapter structure
637 * Updates phy status and takes action for network queue if required
638 * based upon link status
641 static void emac_update_phystatus(struct emac_priv *priv)
646 struct net_device *ndev = priv->ndev;
648 mac_control = emac_read(EMAC_MACCONTROL);
649 cur_duplex = (mac_control & EMAC_MACCONTROL_FULLDUPLEXEN) ?
650 DUPLEX_FULL : DUPLEX_HALF;
652 new_duplex = priv->phydev->duplex;
654 new_duplex = DUPLEX_FULL;
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);
662 mac_control &= ~(EMAC_MACCONTROL_FULLDUPLEXEN);
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);
670 /* Clear the GIG bit and GIGFORCE bit */
671 mac_control &= ~(EMAC_DM646X_MACCONTORL_GIGFORCE |
672 EMAC_DM646X_MACCONTORL_GIG);
674 if (priv->rmii_en && (priv->speed == SPEED_100))
675 mac_control |= EMAC_MACCONTROL_RMIISPEED_MASK;
677 mac_control &= ~EMAC_MACCONTROL_RMIISPEED_MASK;
680 /* Update mac_control if changed */
681 emac_write(EMAC_MACCONTROL, mac_control);
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);
692 if (netif_carrier_ok(ndev))
693 netif_carrier_off(ndev);
694 if (!netif_queue_stopped(ndev))
695 netif_stop_queue(ndev);
700 * hash_get - Calculate hash value from mac address
701 * @addr: mac address to delete from hash table
703 * Calculates hash value from mac address
706 static u32 hash_get(u8 *addr)
713 for (cnt = 0; cnt < 2; cnt++) {
715 hash ^= (tmpval >> 2) ^ (tmpval << 4);
717 hash ^= (tmpval >> 4) ^ (tmpval << 2);
719 hash ^= (tmpval >> 6) ^ (tmpval);
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
730 * Adds mac address to the internal hash table
733 static int hash_add(struct emac_priv *priv, u8 *mac_addr)
735 struct device *emac_dev = &priv->ndev->dev;
738 u32 hash_value = hash_get(mac_addr);
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));
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;
756 hash_bit = BIT((hash_value - 32));
757 priv->mac_hash2 |= hash_bit;
761 /* incr counter for num of mcast addr's mapped to "this" hash bit */
762 ++priv->multicast_hash_cnt[hash_value];
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
772 * Removes mac address from the internal hash table
775 static int hash_del(struct emac_priv *priv, u8 *mac_addr)
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];
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)
791 if (hash_value < 32) {
792 hash_bit = BIT(hash_value);
793 priv->mac_hash1 &= ~hash_bit;
795 hash_bit = BIT((hash_value - 32));
796 priv->mac_hash2 &= ~hash_bit;
799 /* return 1 to indicate change in mac_hash registers reqd */
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
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
815 * Set multicast addresses in EMAC adapter - internal function
818 static void emac_add_mcast(struct emac_priv *priv, u32 action, u8 *mac_addr)
820 struct device *emac_dev = &priv->ndev->dev;
824 case EMAC_MULTICAST_ADD:
825 update = hash_add(priv, mac_addr);
827 case EMAC_MULTICAST_DEL:
828 update = hash_del(priv, mac_addr);
830 case EMAC_ALL_MULTI_SET:
832 priv->mac_hash1 = EMAC_ALL_MULTI_REG_VALUE;
833 priv->mac_hash2 = EMAC_ALL_MULTI_REG_VALUE;
835 case EMAC_ALL_MULTI_CLR:
839 memset(&(priv->multicast_hash_cnt[0]), 0,
840 sizeof(priv->multicast_hash_cnt[0]) *
841 EMAC_NUM_MULTICAST_BITS);
844 if (netif_msg_drv(priv))
845 dev_err(emac_dev, "DaVinci EMAC: add_mcast"\
846 ": bad operation %d", action);
850 /* write to the hardware only if the register status chances */
852 emac_write(EMAC_MACHASH1, priv->mac_hash1);
853 emac_write(EMAC_MACHASH2, priv->mac_hash2);
858 * emac_dev_mcast_set - Set multicast address in the EMAC adapter
859 * @ndev: The DaVinci EMAC network adapter
861 * Set multicast addresses in EMAC adapter
864 static void emac_dev_mcast_set(struct net_device *ndev)
867 struct emac_priv *priv = netdev_priv(ndev);
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);
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);
880 if (!netdev_mc_empty(ndev)) {
881 struct netdev_hw_addr *ha;
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,
891 mbp_enable = (mbp_enable & ~EMAC_MBP_RXMCAST);
892 emac_add_mcast(priv, EMAC_ALL_MULTI_CLR, NULL);
895 /* Set mbp config register */
896 emac_write(EMAC_RXMBPENABLE, mbp_enable);
899 /*************************************************************************
900 * EMAC Hardware manipulation
901 *************************************************************************/
904 * emac_int_disable - Disable EMAC module interrupt (from adapter)
905 * @priv: The DaVinci EMAC private adapter structure
907 * Disable EMAC interrupt on the adapter
910 static void emac_int_disable(struct emac_priv *priv)
912 if (priv->version == EMAC_VERSION_2) {
915 local_irq_save(flags);
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)
925 local_irq_restore(flags);
928 /* Set DM644x control registers for interrupt control */
929 emac_ctrl_write(EMAC_CTRL_EWCTL, 0x0);
934 * emac_int_enable - Enable EMAC module interrupt (from adapter)
935 * @priv: The DaVinci EMAC private adapter structure
937 * Enable EMAC interrupt on the adapter
940 static void emac_int_enable(struct emac_priv *priv)
942 if (priv->version == EMAC_VERSION_2) {
943 if (priv->int_enable)
946 emac_ctrl_write(EMAC_DM646X_CMRXINTEN, 0xff);
947 emac_ctrl_write(EMAC_DM646X_CMTXINTEN, 0xff);
949 /* In addition to turning on interrupt Enable, we need
950 * ack by writing appropriate values to the EOI
953 /* NOTE: Rx Threshold and Misc interrupts are not enabled */
955 /* ack rxen only then a new pulse will be generated */
956 emac_write(EMAC_DM646X_MACEOIVECTOR,
957 EMAC_DM646X_MAC_EOI_C0_RXEN);
959 /* ack txen- only then a new pulse will be generated */
960 emac_write(EMAC_DM646X_MACEOIVECTOR,
961 EMAC_DM646X_MAC_EOI_C0_TXEN);
964 /* Set DM644x control registers for interrupt control */
965 emac_ctrl_write(EMAC_CTRL_EWCTL, 0x1);
970 * emac_irq - EMAC interrupt handler
971 * @irq: interrupt number
972 * @dev_id: EMAC network adapter data structure ptr
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
977 * Returns interrupt handled condition
979 static irqreturn_t emac_irq(int irq, void *dev_id)
981 struct net_device *ndev = (struct net_device *)dev_id;
982 struct emac_priv *priv = netdev_priv(ndev);
985 if (likely(netif_running(priv->ndev))) {
986 emac_int_disable(priv);
987 napi_schedule(&priv->napi);
989 /* we are closing down, so dont process anything */
994 static struct sk_buff *emac_rx_alloc(struct emac_priv *priv)
996 struct sk_buff *skb = netdev_alloc_skb(priv->ndev, priv->rx_buf_size);
999 skb_reserve(skb, NET_IP_ALIGN);
1003 static void emac_rx_handler(void *token, int len, int status)
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;
1011 /* free and bail if we are shutting down */
1012 if (unlikely(!netif_running(ndev))) {
1013 dev_kfree_skb_any(skb);
1017 /* recycle on receive error */
1019 ndev->stats.rx_errors++;
1023 /* feed received packet up the stack */
1025 skb->protocol = eth_type_trans(skb, ndev);
1026 netif_receive_skb(skb);
1027 ndev->stats.rx_bytes += len;
1028 ndev->stats.rx_packets++;
1030 /* alloc a new packet for receive */
1031 skb = emac_rx_alloc(priv);
1033 if (netif_msg_rx_err(priv) && net_ratelimit())
1034 dev_err(emac_dev, "failed rx buffer alloc\n");
1039 ret = cpdma_chan_submit(priv->rxchan, skb, skb->data,
1040 skb_tailroom(skb), 0, GFP_KERNEL);
1042 WARN_ON(ret == -ENOMEM);
1043 if (unlikely(ret < 0))
1044 dev_kfree_skb_any(skb);
1047 static void emac_tx_handler(void *token, int len, int status)
1049 struct sk_buff *skb = token;
1050 struct net_device *ndev = skb->dev;
1052 /* Check whether the queue is stopped due to stalled tx dma, if the
1053 * queue is stopped then start the queue as we have free desc for tx
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);
1063 * emac_dev_xmit - EMAC Transmit function
1065 * @ndev: The DaVinci EMAC network adapter
1067 * Called by the system to transmit a packet - we queue the packet in
1068 * EMAC hardware transmit queue
1070 * Returns success(NETDEV_TX_OK) or error code (typically out of desc's)
1072 static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev)
1074 struct device *emac_dev = &ndev->dev;
1076 struct emac_priv *priv = netdev_priv(ndev);
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");
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");
1092 skb_tx_timestamp(skb);
1094 ret_code = cpdma_chan_submit(priv->txchan, skb, skb->data, skb->len,
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");
1102 /* If there is no more tx desc left free then we need to
1103 * tell the kernel to stop sending us tx frames.
1105 if (unlikely(cpdma_check_free_tx_desc(priv->txchan)))
1106 netif_stop_queue(ndev);
1108 return NETDEV_TX_OK;
1111 ndev->stats.tx_dropped++;
1112 netif_stop_queue(ndev);
1113 return NETDEV_TX_BUSY;
1117 * emac_dev_tx_timeout - EMAC Transmit timeout function
1118 * @ndev: The DaVinci EMAC network adapter
1120 * Called when system detects that a skb timeout period has expired
1121 * potentially due to a fault in the adapter in not being able to send
1122 * it out on the wire. We teardown the TX channel assuming a hardware
1123 * error and re-initialize the TX channel for hardware operation
1126 static void emac_dev_tx_timeout(struct net_device *ndev)
1128 struct emac_priv *priv = netdev_priv(ndev);
1129 struct device *emac_dev = &ndev->dev;
1131 if (netif_msg_tx_err(priv))
1132 dev_err(emac_dev, "DaVinci EMAC: xmit timeout, restarting TX");
1134 emac_dump_regs(priv);
1136 ndev->stats.tx_errors++;
1137 emac_int_disable(priv);
1138 cpdma_chan_stop(priv->txchan);
1139 cpdma_chan_start(priv->txchan);
1140 emac_int_enable(priv);
1144 * emac_set_type0addr - Set EMAC Type0 mac address
1145 * @priv: The DaVinci EMAC private adapter structure
1146 * @ch: RX channel number
1147 * @mac_addr: MAC address to set in device
1149 * Called internally to set Type0 mac address of the adapter (Device)
1151 * Returns success (0) or appropriate error code (none as of now)
1153 static void emac_set_type0addr(struct emac_priv *priv, u32 ch, char *mac_addr)
1156 val = ((mac_addr[5] << 8) | (mac_addr[4]));
1157 emac_write(EMAC_MACSRCADDRLO, val);
1159 val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \
1160 (mac_addr[1] << 8) | (mac_addr[0]));
1161 emac_write(EMAC_MACSRCADDRHI, val);
1162 val = emac_read(EMAC_RXUNICASTSET);
1164 emac_write(EMAC_RXUNICASTSET, val);
1165 val = emac_read(EMAC_RXUNICASTCLEAR);
1167 emac_write(EMAC_RXUNICASTCLEAR, val);
1171 * emac_set_type1addr - Set EMAC Type1 mac address
1172 * @priv: The DaVinci EMAC private adapter structure
1173 * @ch: RX channel number
1174 * @mac_addr: MAC address to set in device
1176 * Called internally to set Type1 mac address of the adapter (Device)
1178 * Returns success (0) or appropriate error code (none as of now)
1180 static void emac_set_type1addr(struct emac_priv *priv, u32 ch, char *mac_addr)
1183 emac_write(EMAC_MACINDEX, ch);
1184 val = ((mac_addr[5] << 8) | mac_addr[4]);
1185 emac_write(EMAC_MACADDRLO, val);
1186 val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \
1187 (mac_addr[1] << 8) | (mac_addr[0]));
1188 emac_write(EMAC_MACADDRHI, val);
1189 emac_set_type0addr(priv, ch, mac_addr);
1193 * emac_set_type2addr - Set EMAC Type2 mac address
1194 * @priv: The DaVinci EMAC private adapter structure
1195 * @ch: RX channel number
1196 * @mac_addr: MAC address to set in device
1197 * @index: index into RX address entries
1198 * @match: match parameter for RX address matching logic
1200 * Called internally to set Type2 mac address of the adapter (Device)
1202 * Returns success (0) or appropriate error code (none as of now)
1204 static void emac_set_type2addr(struct emac_priv *priv, u32 ch,
1205 char *mac_addr, int index, int match)
1208 emac_write(EMAC_MACINDEX, index);
1209 val = ((mac_addr[3] << 24) | (mac_addr[2] << 16) | \
1210 (mac_addr[1] << 8) | (mac_addr[0]));
1211 emac_write(EMAC_MACADDRHI, val);
1212 val = ((mac_addr[5] << 8) | mac_addr[4] | ((ch & 0x7) << 16) | \
1213 (match << 19) | BIT(20));
1214 emac_write(EMAC_MACADDRLO, val);
1215 emac_set_type0addr(priv, ch, mac_addr);
1219 * emac_setmac - Set mac address in the adapter (internal function)
1220 * @priv: The DaVinci EMAC private adapter structure
1221 * @ch: RX channel number
1222 * @mac_addr: MAC address to set in device
1224 * Called internally to set the mac address of the adapter (Device)
1226 * Returns success (0) or appropriate error code (none as of now)
1228 static void emac_setmac(struct emac_priv *priv, u32 ch, char *mac_addr)
1230 struct device *emac_dev = &priv->ndev->dev;
1232 if (priv->rx_addr_type == 0) {
1233 emac_set_type0addr(priv, ch, mac_addr);
1234 } else if (priv->rx_addr_type == 1) {
1236 for (cnt = 0; cnt < EMAC_MAX_TXRX_CHANNELS; cnt++)
1237 emac_set_type1addr(priv, ch, mac_addr);
1238 } else if (priv->rx_addr_type == 2) {
1239 emac_set_type2addr(priv, ch, mac_addr, ch, 1);
1240 emac_set_type0addr(priv, ch, mac_addr);
1242 if (netif_msg_drv(priv))
1243 dev_err(emac_dev, "DaVinci EMAC: Wrong addressing\n");
1248 * emac_dev_setmac_addr - Set mac address in the adapter
1249 * @ndev: The DaVinci EMAC network adapter
1250 * @addr: MAC address to set in device
1252 * Called by the system to set the mac address of the adapter (Device)
1254 * Returns success (0) or appropriate error code (none as of now)
1256 static int emac_dev_setmac_addr(struct net_device *ndev, void *addr)
1258 struct emac_priv *priv = netdev_priv(ndev);
1259 struct device *emac_dev = &priv->ndev->dev;
1260 struct sockaddr *sa = addr;
1262 if (!is_valid_ether_addr(sa->sa_data))
1263 return -EADDRNOTAVAIL;
1265 /* Store mac addr in priv and rx channel and set it in EMAC hw */
1266 memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len);
1267 memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len);
1269 /* MAC address is configured only after the interface is enabled. */
1270 if (netif_running(ndev)) {
1271 emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr);
1274 if (netif_msg_drv(priv))
1275 dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %pM\n",
1282 * emac_hw_enable - Enable EMAC hardware for packet transmission/reception
1283 * @priv: The DaVinci EMAC private adapter structure
1285 * Enables EMAC hardware for packet processing - enables PHY, enables RX
1286 * for packet reception and enables device interrupts and then NAPI
1288 * Returns success (0) or appropriate error code (none right now)
1290 static int emac_hw_enable(struct emac_priv *priv)
1292 u32 val, mbp_enable, mac_control;
1295 emac_write(EMAC_SOFTRESET, 1);
1296 while (emac_read(EMAC_SOFTRESET))
1299 /* Disable interrupt & Set pacing for more interrupts initially */
1300 emac_int_disable(priv);
1302 /* Full duplex enable bit set when auto negotiation happens */
1304 (((EMAC_DEF_TXPRIO_FIXED) ? (EMAC_MACCONTROL_TXPTYPE) : 0x0) |
1305 ((priv->speed == 1000) ? EMAC_MACCONTROL_GIGABITEN : 0x0) |
1306 ((EMAC_DEF_TXPACING_EN) ? (EMAC_MACCONTROL_TXPACEEN) : 0x0) |
1307 ((priv->duplex == DUPLEX_FULL) ? 0x1 : 0));
1308 emac_write(EMAC_MACCONTROL, mac_control);
1311 (((EMAC_DEF_PASS_CRC) ? (EMAC_RXMBP_PASSCRC_MASK) : 0x0) |
1312 ((EMAC_DEF_QOS_EN) ? (EMAC_RXMBP_QOSEN_MASK) : 0x0) |
1313 ((EMAC_DEF_NO_BUFF_CHAIN) ? (EMAC_RXMBP_NOCHAIN_MASK) : 0x0) |
1314 ((EMAC_DEF_MACCTRL_FRAME_EN) ? (EMAC_RXMBP_CMFEN_MASK) : 0x0) |
1315 ((EMAC_DEF_SHORT_FRAME_EN) ? (EMAC_RXMBP_CSFEN_MASK) : 0x0) |
1316 ((EMAC_DEF_ERROR_FRAME_EN) ? (EMAC_RXMBP_CEFEN_MASK) : 0x0) |
1317 ((EMAC_DEF_PROM_EN) ? (EMAC_RXMBP_CAFEN_MASK) : 0x0) |
1318 ((EMAC_DEF_PROM_CH & EMAC_RXMBP_CHMASK) << \
1319 EMAC_RXMBP_PROMCH_SHIFT) |
1320 ((EMAC_DEF_BCAST_EN) ? (EMAC_RXMBP_BROADEN_MASK) : 0x0) |
1321 ((EMAC_DEF_BCAST_CH & EMAC_RXMBP_CHMASK) << \
1322 EMAC_RXMBP_BROADCH_SHIFT) |
1323 ((EMAC_DEF_MCAST_EN) ? (EMAC_RXMBP_MULTIEN_MASK) : 0x0) |
1324 ((EMAC_DEF_MCAST_CH & EMAC_RXMBP_CHMASK) << \
1325 EMAC_RXMBP_MULTICH_SHIFT));
1326 emac_write(EMAC_RXMBPENABLE, mbp_enable);
1327 emac_write(EMAC_RXMAXLEN, (EMAC_DEF_MAX_FRAME_SIZE &
1328 EMAC_RX_MAX_LEN_MASK));
1329 emac_write(EMAC_RXBUFFEROFFSET, (EMAC_DEF_BUFFER_OFFSET &
1330 EMAC_RX_BUFFER_OFFSET_MASK));
1331 emac_write(EMAC_RXFILTERLOWTHRESH, 0);
1332 emac_write(EMAC_RXUNICASTCLEAR, EMAC_RX_UNICAST_CLEAR_ALL);
1333 priv->rx_addr_type = (emac_read(EMAC_MACCONFIG) >> 8) & 0xFF;
1335 emac_write(EMAC_MACINTMASKSET, EMAC_MAC_HOST_ERR_INTMASK_VAL);
1337 emac_setmac(priv, EMAC_DEF_RX_CH, priv->mac_addr);
1340 val = emac_read(EMAC_MACCONTROL);
1341 val |= (EMAC_MACCONTROL_GMIIEN);
1342 emac_write(EMAC_MACCONTROL, val);
1344 /* Enable NAPI and interrupts */
1345 napi_enable(&priv->napi);
1346 emac_int_enable(priv);
1352 * emac_poll - EMAC NAPI Poll function
1353 * @ndev: The DaVinci EMAC network adapter
1354 * @budget: Number of receive packets to process (as told by NAPI layer)
1356 * NAPI Poll function implemented to process packets as per budget. We check
1357 * the type of interrupt on the device and accordingly call the TX or RX
1358 * packet processing functions. We follow the budget for RX processing and
1359 * also put a cap on number of TX pkts processed through config param. The
1360 * NAPI schedule function is called if more packets pending.
1362 * Returns number of packets received (in most cases; else TX pkts - rarely)
1364 static int emac_poll(struct napi_struct *napi, int budget)
1367 struct emac_priv *priv = container_of(napi, struct emac_priv, napi);
1368 struct net_device *ndev = priv->ndev;
1369 struct device *emac_dev = &ndev->dev;
1371 u32 num_tx_pkts = 0, num_rx_pkts = 0;
1373 /* Check interrupt vectors and call packet processing */
1374 status = emac_read(EMAC_MACINVECTOR);
1376 mask = EMAC_DM644X_MAC_IN_VECTOR_TX_INT_VEC;
1378 if (priv->version == EMAC_VERSION_2)
1379 mask = EMAC_DM646X_MAC_IN_VECTOR_TX_INT_VEC;
1381 if (status & mask) {
1382 num_tx_pkts = cpdma_chan_process(priv->txchan,
1383 EMAC_DEF_TX_MAX_SERVICE);
1384 } /* TX processing */
1386 mask = EMAC_DM644X_MAC_IN_VECTOR_RX_INT_VEC;
1388 if (priv->version == EMAC_VERSION_2)
1389 mask = EMAC_DM646X_MAC_IN_VECTOR_RX_INT_VEC;
1391 if (status & mask) {
1392 num_rx_pkts = cpdma_chan_process(priv->rxchan, budget);
1393 } /* RX processing */
1395 mask = EMAC_DM644X_MAC_IN_VECTOR_HOST_INT;
1396 if (priv->version == EMAC_VERSION_2)
1397 mask = EMAC_DM646X_MAC_IN_VECTOR_HOST_INT;
1399 if (unlikely(status & mask)) {
1401 dev_err(emac_dev, "DaVinci EMAC: Fatal Hardware Error\n");
1402 netif_stop_queue(ndev);
1403 napi_disable(&priv->napi);
1405 status = emac_read(EMAC_MACSTATUS);
1406 cause = ((status & EMAC_MACSTATUS_TXERRCODE_MASK) >>
1407 EMAC_MACSTATUS_TXERRCODE_SHIFT);
1409 ch = ((status & EMAC_MACSTATUS_TXERRCH_MASK) >>
1410 EMAC_MACSTATUS_TXERRCH_SHIFT);
1411 if (net_ratelimit()) {
1412 dev_err(emac_dev, "TX Host error %s on ch=%d\n",
1413 &emac_txhost_errcodes[cause][0], ch);
1416 cause = ((status & EMAC_MACSTATUS_RXERRCODE_MASK) >>
1417 EMAC_MACSTATUS_RXERRCODE_SHIFT);
1419 ch = ((status & EMAC_MACSTATUS_RXERRCH_MASK) >>
1420 EMAC_MACSTATUS_RXERRCH_SHIFT);
1421 if (netif_msg_hw(priv) && net_ratelimit())
1422 dev_err(emac_dev, "RX Host error %s on ch=%d\n",
1423 &emac_rxhost_errcodes[cause][0], ch);
1425 } else if (num_rx_pkts < budget) {
1426 napi_complete(napi);
1427 emac_int_enable(priv);
1433 #ifdef CONFIG_NET_POLL_CONTROLLER
1435 * emac_poll_controller - EMAC Poll controller function
1436 * @ndev: The DaVinci EMAC network adapter
1438 * Polled functionality used by netconsole and others in non interrupt mode
1441 void emac_poll_controller(struct net_device *ndev)
1443 struct emac_priv *priv = netdev_priv(ndev);
1445 emac_int_disable(priv);
1446 emac_irq(ndev->irq, ndev);
1447 emac_int_enable(priv);
1451 static void emac_adjust_link(struct net_device *ndev)
1453 struct emac_priv *priv = netdev_priv(ndev);
1454 struct phy_device *phydev = priv->phydev;
1455 unsigned long flags;
1458 spin_lock_irqsave(&priv->lock, flags);
1461 /* check the mode of operation - full/half duplex */
1462 if (phydev->duplex != priv->duplex) {
1464 priv->duplex = phydev->duplex;
1466 if (phydev->speed != priv->speed) {
1468 priv->speed = phydev->speed;
1475 } else if (priv->link) {
1482 emac_update_phystatus(priv);
1483 phy_print_status(priv->phydev);
1486 spin_unlock_irqrestore(&priv->lock, flags);
1489 /*************************************************************************
1490 * Linux Driver Model
1491 *************************************************************************/
1494 * emac_devioctl - EMAC adapter ioctl
1495 * @ndev: The DaVinci EMAC network adapter
1496 * @ifrq: request parameter
1497 * @cmd: command parameter
1499 * EMAC driver ioctl function
1501 * Returns success(0) or appropriate error code
1503 static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd)
1505 struct emac_priv *priv = netdev_priv(ndev);
1507 if (!(netif_running(ndev)))
1510 /* TODO: Add phy read and write and private statistics get feature */
1512 return phy_mii_ioctl(priv->phydev, ifrq, cmd);
1515 static int match_first_device(struct device *dev, void *data)
1517 return !strncmp(dev_name(dev), "davinci_mdio", 12);
1521 * emac_dev_open - EMAC device open
1522 * @ndev: The DaVinci EMAC network adapter
1524 * Called when system wants to start the interface. We init TX/RX channels
1525 * and enable the hardware for packet reception/transmission and start the
1528 * Returns 0 for a successful open, or appropriate error code
1530 static int emac_dev_open(struct net_device *ndev)
1532 struct device *emac_dev = &ndev->dev;
1534 struct resource *res;
1538 struct emac_priv *priv = netdev_priv(ndev);
1540 pm_runtime_get(&priv->pdev->dev);
1542 netif_carrier_off(ndev);
1543 for (cnt = 0; cnt < ETH_ALEN; cnt++)
1544 ndev->dev_addr[cnt] = priv->mac_addr[cnt];
1546 /* Configuration items */
1547 priv->rx_buf_size = EMAC_DEF_MAX_FRAME_SIZE + NET_IP_ALIGN;
1549 priv->mac_hash1 = 0;
1550 priv->mac_hash2 = 0;
1551 emac_write(EMAC_MACHASH1, 0);
1552 emac_write(EMAC_MACHASH2, 0);
1554 for (i = 0; i < EMAC_DEF_RX_NUM_DESC; i++) {
1555 struct sk_buff *skb = emac_rx_alloc(priv);
1560 ret = cpdma_chan_submit(priv->rxchan, skb, skb->data,
1561 skb_tailroom(skb), 0, GFP_KERNEL);
1562 if (WARN_ON(ret < 0))
1568 while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
1569 for (i = res->start; i <= res->end; i++) {
1570 if (request_irq(i, emac_irq, IRQF_DISABLED,
1577 /* Start/Enable EMAC hardware */
1578 emac_hw_enable(priv);
1580 /* Enable Interrupt pacing if configured */
1581 if (priv->coal_intvl != 0) {
1582 struct ethtool_coalesce coal;
1584 coal.rx_coalesce_usecs = (priv->coal_intvl << 4);
1585 emac_set_coalesce(ndev, &coal);
1588 cpdma_ctlr_start(priv->dma);
1590 priv->phydev = NULL;
1591 /* use the first phy on the bus if pdata did not give us a phy id */
1592 if (!priv->phy_id) {
1595 phy = bus_find_device(&mdio_bus_type, NULL, NULL,
1596 match_first_device);
1598 priv->phy_id = dev_name(phy);
1601 if (priv->phy_id && *priv->phy_id) {
1602 priv->phydev = phy_connect(ndev, priv->phy_id,
1604 PHY_INTERFACE_MODE_MII);
1606 if (IS_ERR(priv->phydev)) {
1607 dev_err(emac_dev, "could not connect to phy %s\n",
1609 ret = PTR_ERR(priv->phydev);
1610 priv->phydev = NULL;
1618 dev_info(emac_dev, "attached PHY driver [%s] "
1619 "(mii_bus:phy_addr=%s, id=%x)\n",
1620 priv->phydev->drv->name, dev_name(&priv->phydev->dev),
1621 priv->phydev->phy_id);
1623 /* No PHY , fix the link, speed and duplex settings */
1624 dev_notice(emac_dev, "no phy, defaulting to 100/full\n");
1626 priv->speed = SPEED_100;
1627 priv->duplex = DUPLEX_FULL;
1628 emac_update_phystatus(priv);
1631 if (!netif_running(ndev)) /* debug only - to avoid compiler warning */
1632 emac_dump_regs(priv);
1634 if (netif_msg_drv(priv))
1635 dev_notice(emac_dev, "DaVinci EMAC: Opened %s\n", ndev->name);
1638 phy_start(priv->phydev);
1644 dev_err(emac_dev, "DaVinci EMAC: request_irq() failed");
1646 for (q = k; k >= 0; k--) {
1647 for (m = i; m >= res->start; m--)
1649 res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k-1);
1655 pm_runtime_put(&priv->pdev->dev);
1660 * emac_dev_stop - EMAC device stop
1661 * @ndev: The DaVinci EMAC network adapter
1663 * Called when system wants to stop or down the interface. We stop the network
1664 * queue, disable interrupts and cleanup TX/RX channels.
1666 * We return the statistics in net_device_stats structure pulled from emac
1668 static int emac_dev_stop(struct net_device *ndev)
1670 struct resource *res;
1673 struct emac_priv *priv = netdev_priv(ndev);
1674 struct device *emac_dev = &ndev->dev;
1676 /* inform the upper layers. */
1677 netif_stop_queue(ndev);
1678 napi_disable(&priv->napi);
1680 netif_carrier_off(ndev);
1681 emac_int_disable(priv);
1682 cpdma_ctlr_stop(priv->dma);
1683 emac_write(EMAC_SOFTRESET, 1);
1686 phy_disconnect(priv->phydev);
1689 while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, i))) {
1690 for (irq_num = res->start; irq_num <= res->end; irq_num++)
1691 free_irq(irq_num, priv->ndev);
1695 if (netif_msg_drv(priv))
1696 dev_notice(emac_dev, "DaVinci EMAC: %s stopped\n", ndev->name);
1698 pm_runtime_put(&priv->pdev->dev);
1703 * emac_dev_getnetstats - EMAC get statistics function
1704 * @ndev: The DaVinci EMAC network adapter
1706 * Called when system wants to get statistics from the device.
1708 * We return the statistics in net_device_stats structure pulled from emac
1710 static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev)
1712 struct emac_priv *priv = netdev_priv(ndev);
1714 u32 stats_clear_mask;
1716 /* update emac hardware stats and reset the registers*/
1718 mac_control = emac_read(EMAC_MACCONTROL);
1720 if (mac_control & EMAC_MACCONTROL_GMIIEN)
1721 stats_clear_mask = EMAC_STATS_CLR_MASK;
1723 stats_clear_mask = 0;
1725 ndev->stats.multicast += emac_read(EMAC_RXMCASTFRAMES);
1726 emac_write(EMAC_RXMCASTFRAMES, stats_clear_mask);
1728 ndev->stats.collisions += (emac_read(EMAC_TXCOLLISION) +
1729 emac_read(EMAC_TXSINGLECOLL) +
1730 emac_read(EMAC_TXMULTICOLL));
1731 emac_write(EMAC_TXCOLLISION, stats_clear_mask);
1732 emac_write(EMAC_TXSINGLECOLL, stats_clear_mask);
1733 emac_write(EMAC_TXMULTICOLL, stats_clear_mask);
1735 ndev->stats.rx_length_errors += (emac_read(EMAC_RXOVERSIZED) +
1736 emac_read(EMAC_RXJABBER) +
1737 emac_read(EMAC_RXUNDERSIZED));
1738 emac_write(EMAC_RXOVERSIZED, stats_clear_mask);
1739 emac_write(EMAC_RXJABBER, stats_clear_mask);
1740 emac_write(EMAC_RXUNDERSIZED, stats_clear_mask);
1742 ndev->stats.rx_over_errors += (emac_read(EMAC_RXSOFOVERRUNS) +
1743 emac_read(EMAC_RXMOFOVERRUNS));
1744 emac_write(EMAC_RXSOFOVERRUNS, stats_clear_mask);
1745 emac_write(EMAC_RXMOFOVERRUNS, stats_clear_mask);
1747 ndev->stats.rx_fifo_errors += emac_read(EMAC_RXDMAOVERRUNS);
1748 emac_write(EMAC_RXDMAOVERRUNS, stats_clear_mask);
1750 ndev->stats.tx_carrier_errors +=
1751 emac_read(EMAC_TXCARRIERSENSE);
1752 emac_write(EMAC_TXCARRIERSENSE, stats_clear_mask);
1754 ndev->stats.tx_fifo_errors += emac_read(EMAC_TXUNDERRUN);
1755 emac_write(EMAC_TXUNDERRUN, stats_clear_mask);
1757 return &ndev->stats;
1760 static const struct net_device_ops emac_netdev_ops = {
1761 .ndo_open = emac_dev_open,
1762 .ndo_stop = emac_dev_stop,
1763 .ndo_start_xmit = emac_dev_xmit,
1764 .ndo_set_rx_mode = emac_dev_mcast_set,
1765 .ndo_set_mac_address = emac_dev_setmac_addr,
1766 .ndo_do_ioctl = emac_devioctl,
1767 .ndo_tx_timeout = emac_dev_tx_timeout,
1768 .ndo_get_stats = emac_dev_getnetstats,
1769 #ifdef CONFIG_NET_POLL_CONTROLLER
1770 .ndo_poll_controller = emac_poll_controller,
1775 static struct emac_platform_data
1776 *davinci_emac_of_get_pdata(struct platform_device *pdev,
1777 struct emac_priv *priv)
1779 struct device_node *np;
1780 struct emac_platform_data *pdata = NULL;
1785 pdata = pdev->dev.platform_data;
1787 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1792 np = pdev->dev.of_node;
1796 pdata->version = EMAC_VERSION_2;
1798 if (!is_valid_ether_addr(pdata->mac_addr)) {
1799 mac_addr = of_get_mac_address(np);
1801 memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
1804 ret = of_property_read_u32(np, "ti,davinci-ctrl-reg-offset", &data);
1806 pdata->ctrl_reg_offset = data;
1808 ret = of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset",
1811 pdata->ctrl_mod_reg_offset = data;
1813 ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-offset", &data);
1815 pdata->ctrl_ram_offset = data;
1817 ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-size", &data);
1819 pdata->ctrl_ram_size = data;
1821 ret = of_property_read_u32(np, "ti,davinci-rmii-en", &data);
1823 pdata->rmii_en = data;
1825 ret = of_property_read_u32(np, "ti,davinci-no-bd-ram", &data);
1827 pdata->no_bd_ram = data;
1829 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
1830 if (!priv->phy_node)
1833 pdev->dev.platform_data = pdata;
1838 static struct emac_platform_data
1839 *davinci_emac_of_get_pdata(struct platform_device *pdev,
1840 struct emac_priv *priv)
1842 return pdev->dev.platform_data;
1846 * davinci_emac_probe - EMAC device probe
1847 * @pdev: The DaVinci EMAC device that we are removing
1849 * Called when probing for emac devicesr. We get details of instances and
1850 * resource information from platform init and register a network device
1851 * and allocate resources necessary for driver to perform
1853 static int davinci_emac_probe(struct platform_device *pdev)
1856 struct resource *res;
1857 struct net_device *ndev;
1858 struct emac_priv *priv;
1859 unsigned long size, hw_ram_addr;
1860 struct emac_platform_data *pdata;
1861 struct device *emac_dev;
1862 struct cpdma_params dma_params;
1863 struct clk *emac_clk;
1864 unsigned long emac_bus_frequency;
1867 /* obtain emac clock from kernel */
1868 emac_clk = clk_get(&pdev->dev, NULL);
1869 if (IS_ERR(emac_clk)) {
1870 dev_err(&pdev->dev, "failed to get EMAC clock\n");
1873 emac_bus_frequency = clk_get_rate(emac_clk);
1876 /* TODO: Probe PHY here if possible */
1878 ndev = alloc_etherdev(sizeof(struct emac_priv));
1884 platform_set_drvdata(pdev, ndev);
1885 priv = netdev_priv(ndev);
1888 priv->msg_enable = netif_msg_init(debug_level, DAVINCI_EMAC_DEBUG);
1890 spin_lock_init(&priv->lock);
1892 pdata = davinci_emac_of_get_pdata(pdev, priv);
1894 dev_err(&pdev->dev, "no platform data\n");
1899 /* MAC addr and PHY mask , RMII enable info from platform_data */
1900 memcpy(priv->mac_addr, pdata->mac_addr, 6);
1901 priv->phy_id = pdata->phy_id;
1902 priv->rmii_en = pdata->rmii_en;
1903 priv->version = pdata->version;
1904 priv->int_enable = pdata->interrupt_enable;
1905 priv->int_disable = pdata->interrupt_disable;
1907 priv->coal_intvl = 0;
1908 priv->bus_freq_mhz = (u32)(emac_bus_frequency / 1000000);
1910 emac_dev = &ndev->dev;
1911 /* Get EMAC platform data */
1912 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1914 dev_err(&pdev->dev,"error getting res\n");
1919 priv->emac_base_phys = res->start + pdata->ctrl_reg_offset;
1920 size = resource_size(res);
1921 if (!request_mem_region(res->start, size, ndev->name)) {
1922 dev_err(&pdev->dev, "failed request_mem_region() for regs\n");
1927 priv->remap_addr = ioremap(res->start, size);
1928 if (!priv->remap_addr) {
1929 dev_err(&pdev->dev, "unable to map IO\n");
1931 release_mem_region(res->start, size);
1934 priv->emac_base = priv->remap_addr + pdata->ctrl_reg_offset;
1935 ndev->base_addr = (unsigned long)priv->remap_addr;
1937 priv->ctrl_base = priv->remap_addr + pdata->ctrl_mod_reg_offset;
1939 hw_ram_addr = pdata->hw_ram_addr;
1941 hw_ram_addr = (u32 __force)res->start + pdata->ctrl_ram_offset;
1943 memset(&dma_params, 0, sizeof(dma_params));
1944 dma_params.dev = emac_dev;
1945 dma_params.dmaregs = priv->emac_base;
1946 dma_params.rxthresh = priv->emac_base + 0x120;
1947 dma_params.rxfree = priv->emac_base + 0x140;
1948 dma_params.txhdp = priv->emac_base + 0x600;
1949 dma_params.rxhdp = priv->emac_base + 0x620;
1950 dma_params.txcp = priv->emac_base + 0x640;
1951 dma_params.rxcp = priv->emac_base + 0x660;
1952 dma_params.num_chan = EMAC_MAX_TXRX_CHANNELS;
1953 dma_params.min_packet_size = EMAC_DEF_MIN_ETHPKTSIZE;
1954 dma_params.desc_hw_addr = hw_ram_addr;
1955 dma_params.desc_mem_size = pdata->ctrl_ram_size;
1956 dma_params.desc_align = 16;
1958 dma_params.desc_mem_phys = pdata->no_bd_ram ? 0 :
1959 (u32 __force)res->start + pdata->ctrl_ram_offset;
1961 priv->dma = cpdma_ctlr_create(&dma_params);
1963 dev_err(&pdev->dev, "error initializing DMA\n");
1968 priv->txchan = cpdma_chan_create(priv->dma, tx_chan_num(EMAC_DEF_TX_CH),
1970 priv->rxchan = cpdma_chan_create(priv->dma, rx_chan_num(EMAC_DEF_RX_CH),
1972 if (WARN_ON(!priv->txchan || !priv->rxchan)) {
1977 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1979 dev_err(&pdev->dev, "error getting irq res\n");
1983 ndev->irq = res->start;
1985 if (!is_valid_ether_addr(priv->mac_addr)) {
1986 /* Use random MAC if none passed */
1987 eth_hw_addr_random(ndev);
1988 memcpy(priv->mac_addr, ndev->dev_addr, ndev->addr_len);
1989 dev_warn(&pdev->dev, "using random MAC addr: %pM\n",
1993 ndev->netdev_ops = &emac_netdev_ops;
1994 SET_ETHTOOL_OPS(ndev, ðtool_ops);
1995 netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT);
1997 /* register the network device */
1998 SET_NETDEV_DEV(ndev, &pdev->dev);
1999 rc = register_netdev(ndev);
2001 dev_err(&pdev->dev, "error in register_netdev\n");
2007 if (netif_msg_probe(priv)) {
2008 dev_notice(emac_dev, "DaVinci EMAC Probe found device "\
2009 "(regs: %p, irq: %d)\n",
2010 (void *)priv->emac_base_phys, ndev->irq);
2013 pm_runtime_enable(&pdev->dev);
2014 pm_runtime_resume(&pdev->dev);
2020 cpdma_chan_destroy(priv->txchan);
2022 cpdma_chan_destroy(priv->rxchan);
2023 cpdma_ctlr_destroy(priv->dma);
2025 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2026 release_mem_region(res->start, resource_size(res));
2027 iounmap(priv->remap_addr);
2036 * davinci_emac_remove - EMAC device remove
2037 * @pdev: The DaVinci EMAC device that we are removing
2039 * Called when removing the device driver. We disable clock usage and release
2040 * the resources taken up by the driver and unregister network device
2042 static int davinci_emac_remove(struct platform_device *pdev)
2044 struct resource *res;
2045 struct net_device *ndev = platform_get_drvdata(pdev);
2046 struct emac_priv *priv = netdev_priv(ndev);
2048 dev_notice(&ndev->dev, "DaVinci EMAC: davinci_emac_remove()\n");
2050 platform_set_drvdata(pdev, NULL);
2051 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2054 cpdma_chan_destroy(priv->txchan);
2056 cpdma_chan_destroy(priv->rxchan);
2057 cpdma_ctlr_destroy(priv->dma);
2059 release_mem_region(res->start, resource_size(res));
2061 unregister_netdev(ndev);
2062 iounmap(priv->remap_addr);
2068 static int davinci_emac_suspend(struct device *dev)
2070 struct platform_device *pdev = to_platform_device(dev);
2071 struct net_device *ndev = platform_get_drvdata(pdev);
2073 if (netif_running(ndev))
2074 emac_dev_stop(ndev);
2079 static int davinci_emac_resume(struct device *dev)
2081 struct platform_device *pdev = to_platform_device(dev);
2082 struct net_device *ndev = platform_get_drvdata(pdev);
2084 if (netif_running(ndev))
2085 emac_dev_open(ndev);
2090 static const struct dev_pm_ops davinci_emac_pm_ops = {
2091 .suspend = davinci_emac_suspend,
2092 .resume = davinci_emac_resume,
2095 static const struct of_device_id davinci_emac_of_match[] = {
2096 {.compatible = "ti,davinci-dm6467-emac", },
2099 MODULE_DEVICE_TABLE(of, davinci_emac_of_match);
2101 /* davinci_emac_driver: EMAC platform driver structure */
2102 static struct platform_driver davinci_emac_driver = {
2104 .name = "davinci_emac",
2105 .owner = THIS_MODULE,
2106 .pm = &davinci_emac_pm_ops,
2107 .of_match_table = of_match_ptr(davinci_emac_of_match),
2109 .probe = davinci_emac_probe,
2110 .remove = davinci_emac_remove,
2114 * davinci_emac_init - EMAC driver module init
2116 * Called when initializing the driver. We register the driver with
2119 static int __init davinci_emac_init(void)
2121 return platform_driver_register(&davinci_emac_driver);
2123 late_initcall(davinci_emac_init);
2126 * davinci_emac_exit - EMAC driver module exit
2128 * Called when exiting the driver completely. We unregister the driver with
2129 * the platform and exit
2131 static void __exit davinci_emac_exit(void)
2133 platform_driver_unregister(&davinci_emac_driver);
2135 module_exit(davinci_emac_exit);
2137 MODULE_LICENSE("GPL");
2138 MODULE_AUTHOR("DaVinci EMAC Maintainer: Anant Gole <anantgole@ti.com>");
2139 MODULE_AUTHOR("DaVinci EMAC Maintainer: Chaithrika U S <chaithrika@ti.com>");
2140 MODULE_DESCRIPTION("DaVinci EMAC Ethernet driver");