Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/net/ethernet/smsc/smsc911x.c

  1 /***************************************************************************
  2  *
  3  * Copyright (C) 2004-2008 SMSC
  4  * Copyright (C) 2005-2008 ARM
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * as published by the Free Software Foundation; either version 2
  9  * of the License, or (at your option) any later version.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
 18  *
 19  ***************************************************************************
 20  * Rewritten, heavily based on smsc911x simple driver by SMSC.
 21  * Partly uses io macros from smc91x.c by Nicolas Pitre
 22  *
 23  * Supported devices:
 24  *   LAN9115, LAN9116, LAN9117, LAN9118
 25  *   LAN9215, LAN9216, LAN9217, LAN9218
 26  *   LAN9210, LAN9211
 27  *   LAN9220, LAN9221
 28  *   LAN89218
 29  *
 30  */
 31 
 32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 33 
 34 #include <linux/crc32.h>
 35 #include <linux/clk.h>
 36 #include <linux/delay.h>
 37 #include <linux/errno.h>
 38 #include <linux/etherdevice.h>
 39 #include <linux/ethtool.h>
 40 #include <linux/init.h>
 41 #include <linux/interrupt.h>
 42 #include <linux/ioport.h>
 43 #include <linux/kernel.h>
 44 #include <linux/module.h>
 45 #include <linux/netdevice.h>
 46 #include <linux/platform_device.h>
 47 #include <linux/regulator/consumer.h>
 48 #include <linux/sched.h>
 49 #include <linux/timer.h>
 50 #include <linux/bug.h>
 51 #include <linux/bitops.h>
 52 #include <linux/irq.h>
 53 #include <linux/io.h>
 54 #include <linux/swab.h>
 55 #include <linux/phy.h>
 56 #include <linux/smsc911x.h>
 57 #include <linux/device.h>
 58 #include <linux/of.h>
 59 #include <linux/of_device.h>
 60 #include <linux/of_gpio.h>
 61 #include <linux/of_net.h>
 62 #include <linux/acpi.h>
 63 #include <linux/pm_runtime.h>
 64 #include <linux/property.h>
 65 #include <linux/gpio/consumer.h>
 66 
 67 #include "smsc911x.h"
 68 
 69 #define SMSC_CHIPNAME           "smsc911x"
 70 #define SMSC_MDIONAME           "smsc911x-mdio"
 71 #define SMSC_DRV_VERSION        "2008-10-21"
 72 
 73 MODULE_LICENSE("GPL");
 74 MODULE_VERSION(SMSC_DRV_VERSION);
 75 MODULE_ALIAS("platform:smsc911x");
 76 
 77 #if USE_DEBUG > 0
 78 static int debug = 16;
 79 #else
 80 static int debug = 3;
 81 #endif
 82 
 83 module_param(debug, int, 0);
 84 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 85 
 86 struct smsc911x_data;
 87 
 88 struct smsc911x_ops {
 89         u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
 90         void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
 91         void (*rx_readfifo)(struct smsc911x_data *pdata,
 92                                 unsigned int *buf, unsigned int wordcount);
 93         void (*tx_writefifo)(struct smsc911x_data *pdata,
 94                                 unsigned int *buf, unsigned int wordcount);
 95 };
 96 
 97 #define SMSC911X_NUM_SUPPLIES 2
 98 
 99 struct smsc911x_data {
100         void __iomem *ioaddr;
101 
102         unsigned int idrev;
103 
104         /* used to decide which workarounds apply */
105         unsigned int generation;
106 
107         /* device configuration (copied from platform_data during probe) */
108         struct smsc911x_platform_config config;
109 
110         /* This needs to be acquired before calling any of below:
111          * smsc911x_mac_read(), smsc911x_mac_write()
112          */
113         spinlock_t mac_lock;
114 
115         /* spinlock to ensure register accesses are serialised */
116         spinlock_t dev_lock;
117 
118         struct mii_bus *mii_bus;
119         unsigned int using_extphy;
120         int last_duplex;
121         int last_carrier;
122 
123         u32 msg_enable;
124         unsigned int gpio_setting;
125         unsigned int gpio_orig_setting;
126         struct net_device *dev;
127         struct napi_struct napi;
128 
129         unsigned int software_irq_signal;
130 
131 #ifdef USE_PHY_WORK_AROUND
132 #define MIN_PACKET_SIZE (64)
133         char loopback_tx_pkt[MIN_PACKET_SIZE];
134         char loopback_rx_pkt[MIN_PACKET_SIZE];
135         unsigned int resetcount;
136 #endif
137 
138         /* Members for Multicast filter workaround */
139         unsigned int multicast_update_pending;
140         unsigned int set_bits_mask;
141         unsigned int clear_bits_mask;
142         unsigned int hashhi;
143         unsigned int hashlo;
144 
145         /* register access functions */
146         const struct smsc911x_ops *ops;
147 
148         /* regulators */
149         struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
150 
151         /* Reset GPIO */
152         struct gpio_desc *reset_gpiod;
153 
154         /* clock */
155         struct clk *clk;
156 };
157 
158 /* Easy access to information */
159 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
160 
161 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
162 {
163         if (pdata->config.flags & SMSC911X_USE_32BIT)
164                 return readl(pdata->ioaddr + reg);
165 
166         if (pdata->config.flags & SMSC911X_USE_16BIT)
167                 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
168                         ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
169 
170         BUG();
171         return 0;
172 }
173 
174 static inline u32
175 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
176 {
177         if (pdata->config.flags & SMSC911X_USE_32BIT)
178                 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
179 
180         if (pdata->config.flags & SMSC911X_USE_16BIT)
181                 return (readw(pdata->ioaddr +
182                                 __smsc_shift(pdata, reg)) & 0xFFFF) |
183                         ((readw(pdata->ioaddr +
184                         __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
185 
186         BUG();
187         return 0;
188 }
189 
190 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
191 {
192         u32 data;
193         unsigned long flags;
194 
195         spin_lock_irqsave(&pdata->dev_lock, flags);
196         data = pdata->ops->reg_read(pdata, reg);
197         spin_unlock_irqrestore(&pdata->dev_lock, flags);
198 
199         return data;
200 }
201 
202 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
203                                         u32 val)
204 {
205         if (pdata->config.flags & SMSC911X_USE_32BIT) {
206                 writel(val, pdata->ioaddr + reg);
207                 return;
208         }
209 
210         if (pdata->config.flags & SMSC911X_USE_16BIT) {
211                 writew(val & 0xFFFF, pdata->ioaddr + reg);
212                 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
213                 return;
214         }
215 
216         BUG();
217 }
218 
219 static inline void
220 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
221 {
222         if (pdata->config.flags & SMSC911X_USE_32BIT) {
223                 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
224                 return;
225         }
226 
227         if (pdata->config.flags & SMSC911X_USE_16BIT) {
228                 writew(val & 0xFFFF,
229                         pdata->ioaddr + __smsc_shift(pdata, reg));
230                 writew((val >> 16) & 0xFFFF,
231                         pdata->ioaddr + __smsc_shift(pdata, reg + 2));
232                 return;
233         }
234 
235         BUG();
236 }
237 
238 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
239                                       u32 val)
240 {
241         unsigned long flags;
242 
243         spin_lock_irqsave(&pdata->dev_lock, flags);
244         pdata->ops->reg_write(pdata, reg, val);
245         spin_unlock_irqrestore(&pdata->dev_lock, flags);
246 }
247 
248 /* Writes a packet to the TX_DATA_FIFO */
249 static inline void
250 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
251                       unsigned int wordcount)
252 {
253         unsigned long flags;
254 
255         spin_lock_irqsave(&pdata->dev_lock, flags);
256 
257         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
258                 while (wordcount--)
259                         __smsc911x_reg_write(pdata, TX_DATA_FIFO,
260                                              swab32(*buf++));
261                 goto out;
262         }
263 
264         if (pdata->config.flags & SMSC911X_USE_32BIT) {
265                 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
266                 goto out;
267         }
268 
269         if (pdata->config.flags & SMSC911X_USE_16BIT) {
270                 while (wordcount--)
271                         __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
272                 goto out;
273         }
274 
275         BUG();
276 out:
277         spin_unlock_irqrestore(&pdata->dev_lock, flags);
278 }
279 
280 /* Writes a packet to the TX_DATA_FIFO - shifted version */
281 static inline void
282 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
283                       unsigned int wordcount)
284 {
285         unsigned long flags;
286 
287         spin_lock_irqsave(&pdata->dev_lock, flags);
288 
289         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
290                 while (wordcount--)
291                         __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
292                                              swab32(*buf++));
293                 goto out;
294         }
295 
296         if (pdata->config.flags & SMSC911X_USE_32BIT) {
297                 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
298                                                 TX_DATA_FIFO), buf, wordcount);
299                 goto out;
300         }
301 
302         if (pdata->config.flags & SMSC911X_USE_16BIT) {
303                 while (wordcount--)
304                         __smsc911x_reg_write_shift(pdata,
305                                                  TX_DATA_FIFO, *buf++);
306                 goto out;
307         }
308 
309         BUG();
310 out:
311         spin_unlock_irqrestore(&pdata->dev_lock, flags);
312 }
313 
314 /* Reads a packet out of the RX_DATA_FIFO */
315 static inline void
316 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
317                      unsigned int wordcount)
318 {
319         unsigned long flags;
320 
321         spin_lock_irqsave(&pdata->dev_lock, flags);
322 
323         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
324                 while (wordcount--)
325                         *buf++ = swab32(__smsc911x_reg_read(pdata,
326                                                             RX_DATA_FIFO));
327                 goto out;
328         }
329 
330         if (pdata->config.flags & SMSC911X_USE_32BIT) {
331                 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
332                 goto out;
333         }
334 
335         if (pdata->config.flags & SMSC911X_USE_16BIT) {
336                 while (wordcount--)
337                         *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
338                 goto out;
339         }
340 
341         BUG();
342 out:
343         spin_unlock_irqrestore(&pdata->dev_lock, flags);
344 }
345 
346 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
347 static inline void
348 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
349                      unsigned int wordcount)
350 {
351         unsigned long flags;
352 
353         spin_lock_irqsave(&pdata->dev_lock, flags);
354 
355         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
356                 while (wordcount--)
357                         *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
358                                                             RX_DATA_FIFO));
359                 goto out;
360         }
361 
362         if (pdata->config.flags & SMSC911X_USE_32BIT) {
363                 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
364                                                 RX_DATA_FIFO), buf, wordcount);
365                 goto out;
366         }
367 
368         if (pdata->config.flags & SMSC911X_USE_16BIT) {
369                 while (wordcount--)
370                         *buf++ = __smsc911x_reg_read_shift(pdata,
371                                                                 RX_DATA_FIFO);
372                 goto out;
373         }
374 
375         BUG();
376 out:
377         spin_unlock_irqrestore(&pdata->dev_lock, flags);
378 }
379 
380 /*
381  * enable regulator and clock resources.
382  */
383 static int smsc911x_enable_resources(struct platform_device *pdev)
384 {
385         struct net_device *ndev = platform_get_drvdata(pdev);
386         struct smsc911x_data *pdata = netdev_priv(ndev);
387         int ret = 0;
388 
389         ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
390                         pdata->supplies);
391         if (ret)
392                 netdev_err(ndev, "failed to enable regulators %d\n",
393                                 ret);
394 
395         if (!IS_ERR(pdata->clk)) {
396                 ret = clk_prepare_enable(pdata->clk);
397                 if (ret < 0)
398                         netdev_err(ndev, "failed to enable clock %d\n", ret);
399         }
400 
401         return ret;
402 }
403 
404 /*
405  * disable resources, currently just regulators.
406  */
407 static int smsc911x_disable_resources(struct platform_device *pdev)
408 {
409         struct net_device *ndev = platform_get_drvdata(pdev);
410         struct smsc911x_data *pdata = netdev_priv(ndev);
411         int ret = 0;
412 
413         ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
414                         pdata->supplies);
415 
416         if (!IS_ERR(pdata->clk))
417                 clk_disable_unprepare(pdata->clk);
418 
419         return ret;
420 }
421 
422 /*
423  * Request resources, currently just regulators.
424  *
425  * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
426  * these are not always-on we need to request regulators to be turned on
427  * before we can try to access the device registers.
428  */
429 static int smsc911x_request_resources(struct platform_device *pdev)
430 {
431         struct net_device *ndev = platform_get_drvdata(pdev);
432         struct smsc911x_data *pdata = netdev_priv(ndev);
433         int ret = 0;
434 
435         /* Request regulators */
436         pdata->supplies[0].supply = "vdd33a";
437         pdata->supplies[1].supply = "vddvario";
438         ret = regulator_bulk_get(&pdev->dev,
439                         ARRAY_SIZE(pdata->supplies),
440                         pdata->supplies);
441         if (ret) {
442                 /*
443                  * Retry on deferrals, else just report the error
444                  * and try to continue.
445                  */
446                 if (ret == -EPROBE_DEFER)
447                         return ret;
448                 netdev_err(ndev, "couldn't get regulators %d\n",
449                                 ret);
450         }
451 
452         /* Request optional RESET GPIO */
453         pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev,
454                                                      "reset",
455                                                      GPIOD_OUT_LOW);
456 
457         /* Request clock */
458         pdata->clk = clk_get(&pdev->dev, NULL);
459         if (IS_ERR(pdata->clk))
460                 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
461                         PTR_ERR(pdata->clk));
462 
463         return ret;
464 }
465 
466 /*
467  * Free resources, currently just regulators.
468  *
469  */
470 static void smsc911x_free_resources(struct platform_device *pdev)
471 {
472         struct net_device *ndev = platform_get_drvdata(pdev);
473         struct smsc911x_data *pdata = netdev_priv(ndev);
474 
475         /* Free regulators */
476         regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
477                         pdata->supplies);
478 
479         /* Free clock */
480         if (!IS_ERR(pdata->clk)) {
481                 clk_put(pdata->clk);
482                 pdata->clk = NULL;
483         }
484 }
485 
486 /* waits for MAC not busy, with timeout.  Only called by smsc911x_mac_read
487  * and smsc911x_mac_write, so assumes mac_lock is held */
488 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
489 {
490         int i;
491         u32 val;
492 
493         SMSC_ASSERT_MAC_LOCK(pdata);
494 
495         for (i = 0; i < 40; i++) {
496                 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
497                 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
498                         return 0;
499         }
500         SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
501                   "MAC_CSR_CMD: 0x%08X", val);
502         return -EIO;
503 }
504 
505 /* Fetches a MAC register value. Assumes mac_lock is acquired */
506 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
507 {
508         unsigned int temp;
509 
510         SMSC_ASSERT_MAC_LOCK(pdata);
511 
512         temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
513         if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
514                 SMSC_WARN(pdata, hw, "MAC busy at entry");
515                 return 0xFFFFFFFF;
516         }
517 
518         /* Send the MAC cmd */
519         smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
520                 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
521 
522         /* Workaround for hardware read-after-write restriction */
523         temp = smsc911x_reg_read(pdata, BYTE_TEST);
524 
525         /* Wait for the read to complete */
526         if (likely(smsc911x_mac_complete(pdata) == 0))
527                 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
528 
529         SMSC_WARN(pdata, hw, "MAC busy after read");
530         return 0xFFFFFFFF;
531 }
532 
533 /* Set a mac register, mac_lock must be acquired before calling */
534 static void smsc911x_mac_write(struct smsc911x_data *pdata,
535                                unsigned int offset, u32 val)
536 {
537         unsigned int temp;
538 
539         SMSC_ASSERT_MAC_LOCK(pdata);
540 
541         temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
542         if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
543                 SMSC_WARN(pdata, hw,
544                           "smsc911x_mac_write failed, MAC busy at entry");
545                 return;
546         }
547 
548         /* Send data to write */
549         smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
550 
551         /* Write the actual data */
552         smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
553                 MAC_CSR_CMD_CSR_BUSY_));
554 
555         /* Workaround for hardware read-after-write restriction */
556         temp = smsc911x_reg_read(pdata, BYTE_TEST);
557 
558         /* Wait for the write to complete */
559         if (likely(smsc911x_mac_complete(pdata) == 0))
560                 return;
561 
562         SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
563 }
564 
565 /* Get a phy register */
566 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
567 {
568         struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
569         unsigned long flags;
570         unsigned int addr;
571         int i, reg;
572 
573         spin_lock_irqsave(&pdata->mac_lock, flags);
574 
575         /* Confirm MII not busy */
576         if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
577                 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
578                 reg = -EIO;
579                 goto out;
580         }
581 
582         /* Set the address, index & direction (read from PHY) */
583         addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
584         smsc911x_mac_write(pdata, MII_ACC, addr);
585 
586         /* Wait for read to complete w/ timeout */
587         for (i = 0; i < 100; i++)
588                 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
589                         reg = smsc911x_mac_read(pdata, MII_DATA);
590                         goto out;
591                 }
592 
593         SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
594         reg = -EIO;
595 
596 out:
597         spin_unlock_irqrestore(&pdata->mac_lock, flags);
598         return reg;
599 }
600 
601 /* Set a phy register */
602 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
603                            u16 val)
604 {
605         struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
606         unsigned long flags;
607         unsigned int addr;
608         int i, reg;
609 
610         spin_lock_irqsave(&pdata->mac_lock, flags);
611 
612         /* Confirm MII not busy */
613         if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
614                 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
615                 reg = -EIO;
616                 goto out;
617         }
618 
619         /* Put the data to write in the MAC */
620         smsc911x_mac_write(pdata, MII_DATA, val);
621 
622         /* Set the address, index & direction (write to PHY) */
623         addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
624                 MII_ACC_MII_WRITE_;
625         smsc911x_mac_write(pdata, MII_ACC, addr);
626 
627         /* Wait for write to complete w/ timeout */
628         for (i = 0; i < 100; i++)
629                 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
630                         reg = 0;
631                         goto out;
632                 }
633 
634         SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
635         reg = -EIO;
636 
637 out:
638         spin_unlock_irqrestore(&pdata->mac_lock, flags);
639         return reg;
640 }
641 
642 /* Switch to external phy. Assumes tx and rx are stopped. */
643 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
644 {
645         unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
646 
647         /* Disable phy clocks to the MAC */
648         hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
649         hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
650         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
651         udelay(10);     /* Enough time for clocks to stop */
652 
653         /* Switch to external phy */
654         hwcfg |= HW_CFG_EXT_PHY_EN_;
655         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
656 
657         /* Enable phy clocks to the MAC */
658         hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
659         hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
660         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
661         udelay(10);     /* Enough time for clocks to restart */
662 
663         hwcfg |= HW_CFG_SMI_SEL_;
664         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
665 }
666 
667 /* Autodetects and enables external phy if present on supported chips.
668  * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
669  * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
670 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
671 {
672         unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
673 
674         if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
675                 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
676                 pdata->using_extphy = 0;
677         } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
678                 SMSC_TRACE(pdata, hw, "Forcing external PHY");
679                 smsc911x_phy_enable_external(pdata);
680                 pdata->using_extphy = 1;
681         } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
682                 SMSC_TRACE(pdata, hw,
683                            "HW_CFG EXT_PHY_DET set, using external PHY");
684                 smsc911x_phy_enable_external(pdata);
685                 pdata->using_extphy = 1;
686         } else {
687                 SMSC_TRACE(pdata, hw,
688                            "HW_CFG EXT_PHY_DET clear, using internal PHY");
689                 pdata->using_extphy = 0;
690         }
691 }
692 
693 /* Fetches a tx status out of the status fifo */
694 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
695 {
696         unsigned int result =
697             smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
698 
699         if (result != 0)
700                 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
701 
702         return result;
703 }
704 
705 /* Fetches the next rx status */
706 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
707 {
708         unsigned int result =
709             smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
710 
711         if (result != 0)
712                 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
713 
714         return result;
715 }
716 
717 #ifdef USE_PHY_WORK_AROUND
718 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
719 {
720         unsigned int tries;
721         u32 wrsz;
722         u32 rdsz;
723         ulong bufp;
724 
725         for (tries = 0; tries < 10; tries++) {
726                 unsigned int txcmd_a;
727                 unsigned int txcmd_b;
728                 unsigned int status;
729                 unsigned int pktlength;
730                 unsigned int i;
731 
732                 /* Zero-out rx packet memory */
733                 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
734 
735                 /* Write tx packet to 118 */
736                 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
737                 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
738                 txcmd_a |= MIN_PACKET_SIZE;
739 
740                 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
741 
742                 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
743                 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
744 
745                 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
746                 wrsz = MIN_PACKET_SIZE + 3;
747                 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
748                 wrsz >>= 2;
749 
750                 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
751 
752                 /* Wait till transmit is done */
753                 i = 60;
754                 do {
755                         udelay(5);
756                         status = smsc911x_tx_get_txstatus(pdata);
757                 } while ((i--) && (!status));
758 
759                 if (!status) {
760                         SMSC_WARN(pdata, hw,
761                                   "Failed to transmit during loopback test");
762                         continue;
763                 }
764                 if (status & TX_STS_ES_) {
765                         SMSC_WARN(pdata, hw,
766                                   "Transmit encountered errors during loopback test");
767                         continue;
768                 }
769 
770                 /* Wait till receive is done */
771                 i = 60;
772                 do {
773                         udelay(5);
774                         status = smsc911x_rx_get_rxstatus(pdata);
775                 } while ((i--) && (!status));
776 
777                 if (!status) {
778                         SMSC_WARN(pdata, hw,
779                                   "Failed to receive during loopback test");
780                         continue;
781                 }
782                 if (status & RX_STS_ES_) {
783                         SMSC_WARN(pdata, hw,
784                                   "Receive encountered errors during loopback test");
785                         continue;
786                 }
787 
788                 pktlength = ((status & 0x3FFF0000UL) >> 16);
789                 bufp = (ulong)pdata->loopback_rx_pkt;
790                 rdsz = pktlength + 3;
791                 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
792                 rdsz >>= 2;
793 
794                 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
795 
796                 if (pktlength != (MIN_PACKET_SIZE + 4)) {
797                         SMSC_WARN(pdata, hw, "Unexpected packet size "
798                                   "during loop back test, size=%d, will retry",
799                                   pktlength);
800                 } else {
801                         unsigned int j;
802                         int mismatch = 0;
803                         for (j = 0; j < MIN_PACKET_SIZE; j++) {
804                                 if (pdata->loopback_tx_pkt[j]
805                                     != pdata->loopback_rx_pkt[j]) {
806                                         mismatch = 1;
807                                         break;
808                                 }
809                         }
810                         if (!mismatch) {
811                                 SMSC_TRACE(pdata, hw, "Successfully verified "
812                                            "loopback packet");
813                                 return 0;
814                         } else {
815                                 SMSC_WARN(pdata, hw, "Data mismatch "
816                                           "during loop back test, will retry");
817                         }
818                 }
819         }
820 
821         return -EIO;
822 }
823 
824 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
825 {
826         unsigned int temp;
827         unsigned int i = 100000;
828 
829         temp = smsc911x_reg_read(pdata, PMT_CTRL);
830         smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
831         do {
832                 msleep(1);
833                 temp = smsc911x_reg_read(pdata, PMT_CTRL);
834         } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
835 
836         if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
837                 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
838                 return -EIO;
839         }
840         /* Extra delay required because the phy may not be completed with
841         * its reset when BMCR_RESET is cleared. Specs say 256 uS is
842         * enough delay but using 1ms here to be safe */
843         msleep(1);
844 
845         return 0;
846 }
847 
848 static int smsc911x_phy_loopbacktest(struct net_device *dev)
849 {
850         struct smsc911x_data *pdata = netdev_priv(dev);
851         struct phy_device *phy_dev = dev->phydev;
852         int result = -EIO;
853         unsigned int i, val;
854         unsigned long flags;
855 
856         /* Initialise tx packet using broadcast destination address */
857         eth_broadcast_addr(pdata->loopback_tx_pkt);
858 
859         /* Use incrementing source address */
860         for (i = 6; i < 12; i++)
861                 pdata->loopback_tx_pkt[i] = (char)i;
862 
863         /* Set length type field */
864         pdata->loopback_tx_pkt[12] = 0x00;
865         pdata->loopback_tx_pkt[13] = 0x00;
866 
867         for (i = 14; i < MIN_PACKET_SIZE; i++)
868                 pdata->loopback_tx_pkt[i] = (char)i;
869 
870         val = smsc911x_reg_read(pdata, HW_CFG);
871         val &= HW_CFG_TX_FIF_SZ_;
872         val |= HW_CFG_SF_;
873         smsc911x_reg_write(pdata, HW_CFG, val);
874 
875         smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
876         smsc911x_reg_write(pdata, RX_CFG,
877                 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
878 
879         for (i = 0; i < 10; i++) {
880                 /* Set PHY to 10/FD, no ANEG, and loopback mode */
881                 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr,
882                                    MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX);
883 
884                 /* Enable MAC tx/rx, FD */
885                 spin_lock_irqsave(&pdata->mac_lock, flags);
886                 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
887                                    | MAC_CR_TXEN_ | MAC_CR_RXEN_);
888                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
889 
890                 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
891                         result = 0;
892                         break;
893                 }
894                 pdata->resetcount++;
895 
896                 /* Disable MAC rx */
897                 spin_lock_irqsave(&pdata->mac_lock, flags);
898                 smsc911x_mac_write(pdata, MAC_CR, 0);
899                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
900 
901                 smsc911x_phy_reset(pdata);
902         }
903 
904         /* Disable MAC */
905         spin_lock_irqsave(&pdata->mac_lock, flags);
906         smsc911x_mac_write(pdata, MAC_CR, 0);
907         spin_unlock_irqrestore(&pdata->mac_lock, flags);
908 
909         /* Cancel PHY loopback mode */
910         smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0);
911 
912         smsc911x_reg_write(pdata, TX_CFG, 0);
913         smsc911x_reg_write(pdata, RX_CFG, 0);
914 
915         return result;
916 }
917 #endif                          /* USE_PHY_WORK_AROUND */
918 
919 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
920 {
921         struct net_device *ndev = pdata->dev;
922         struct phy_device *phy_dev = ndev->phydev;
923         u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
924         u32 flow;
925         unsigned long flags;
926 
927         if (phy_dev->duplex == DUPLEX_FULL) {
928                 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
929                 u16 rmtadv = phy_read(phy_dev, MII_LPA);
930                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
931 
932                 if (cap & FLOW_CTRL_RX)
933                         flow = 0xFFFF0002;
934                 else
935                         flow = 0;
936 
937                 if (cap & FLOW_CTRL_TX)
938                         afc |= 0xF;
939                 else
940                         afc &= ~0xF;
941 
942                 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
943                            (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
944                            (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
945         } else {
946                 SMSC_TRACE(pdata, hw, "half duplex");
947                 flow = 0;
948                 afc |= 0xF;
949         }
950 
951         spin_lock_irqsave(&pdata->mac_lock, flags);
952         smsc911x_mac_write(pdata, FLOW, flow);
953         spin_unlock_irqrestore(&pdata->mac_lock, flags);
954 
955         smsc911x_reg_write(pdata, AFC_CFG, afc);
956 }
957 
958 /* Update link mode if anything has changed.  Called periodically when the
959  * PHY is in polling mode, even if nothing has changed. */
960 static void smsc911x_phy_adjust_link(struct net_device *dev)
961 {
962         struct smsc911x_data *pdata = netdev_priv(dev);
963         struct phy_device *phy_dev = dev->phydev;
964         unsigned long flags;
965         int carrier;
966 
967         if (phy_dev->duplex != pdata->last_duplex) {
968                 unsigned int mac_cr;
969                 SMSC_TRACE(pdata, hw, "duplex state has changed");
970 
971                 spin_lock_irqsave(&pdata->mac_lock, flags);
972                 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
973                 if (phy_dev->duplex) {
974                         SMSC_TRACE(pdata, hw,
975                                    "configuring for full duplex mode");
976                         mac_cr |= MAC_CR_FDPX_;
977                 } else {
978                         SMSC_TRACE(pdata, hw,
979                                    "configuring for half duplex mode");
980                         mac_cr &= ~MAC_CR_FDPX_;
981                 }
982                 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
983                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
984 
985                 smsc911x_phy_update_flowcontrol(pdata);
986                 pdata->last_duplex = phy_dev->duplex;
987         }
988 
989         carrier = netif_carrier_ok(dev);
990         if (carrier != pdata->last_carrier) {
991                 SMSC_TRACE(pdata, hw, "carrier state has changed");
992                 if (carrier) {
993                         SMSC_TRACE(pdata, hw, "configuring for carrier OK");
994                         if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
995                             (!pdata->using_extphy)) {
996                                 /* Restore original GPIO configuration */
997                                 pdata->gpio_setting = pdata->gpio_orig_setting;
998                                 smsc911x_reg_write(pdata, GPIO_CFG,
999                                         pdata->gpio_setting);
1000                         }
1001                 } else {
1002                         SMSC_TRACE(pdata, hw, "configuring for no carrier");
1003                         /* Check global setting that LED1
1004                          * usage is 10/100 indicator */
1005                         pdata->gpio_setting = smsc911x_reg_read(pdata,
1006                                 GPIO_CFG);
1007                         if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
1008                             (!pdata->using_extphy)) {
1009                                 /* Force 10/100 LED off, after saving
1010                                  * original GPIO configuration */
1011                                 pdata->gpio_orig_setting = pdata->gpio_setting;
1012 
1013                                 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1014                                 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1015                                                         | GPIO_CFG_GPIODIR0_
1016                                                         | GPIO_CFG_GPIOD0_);
1017                                 smsc911x_reg_write(pdata, GPIO_CFG,
1018                                         pdata->gpio_setting);
1019                         }
1020                 }
1021                 pdata->last_carrier = carrier;
1022         }
1023 }
1024 
1025 static int smsc911x_mii_probe(struct net_device *dev)
1026 {
1027         struct smsc911x_data *pdata = netdev_priv(dev);
1028         struct phy_device *phydev = NULL;
1029         int ret;
1030 
1031         /* find the first phy */
1032         phydev = phy_find_first(pdata->mii_bus);
1033         if (!phydev) {
1034                 netdev_err(dev, "no PHY found\n");
1035                 return -ENODEV;
1036         }
1037 
1038         SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1039                    phydev->mdio.addr, phydev->phy_id);
1040 
1041         ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1042                                  pdata->config.phy_interface);
1043 
1044         if (ret) {
1045                 netdev_err(dev, "Could not attach to PHY\n");
1046                 return ret;
1047         }
1048 
1049         phy_attached_info(phydev);
1050 
1051         /* mask with MAC supported features */
1052         phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1053                               SUPPORTED_Asym_Pause);
1054         phydev->advertising = phydev->supported;
1055 
1056         pdata->last_duplex = -1;
1057         pdata->last_carrier = -1;
1058 
1059 #ifdef USE_PHY_WORK_AROUND
1060         if (smsc911x_phy_loopbacktest(dev) < 0) {
1061                 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1062                 phy_disconnect(phydev);
1063                 return -ENODEV;
1064         }
1065         SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1066 #endif                          /* USE_PHY_WORK_AROUND */
1067 
1068         SMSC_TRACE(pdata, hw, "phy initialised successfully");
1069         return 0;
1070 }
1071 
1072 static int smsc911x_mii_init(struct platform_device *pdev,
1073                              struct net_device *dev)
1074 {
1075         struct smsc911x_data *pdata = netdev_priv(dev);
1076         int err = -ENXIO;
1077 
1078         pdata->mii_bus = mdiobus_alloc();
1079         if (!pdata->mii_bus) {
1080                 err = -ENOMEM;
1081                 goto err_out_1;
1082         }
1083 
1084         pdata->mii_bus->name = SMSC_MDIONAME;
1085         snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1086                 pdev->name, pdev->id);
1087         pdata->mii_bus->priv = pdata;
1088         pdata->mii_bus->read = smsc911x_mii_read;
1089         pdata->mii_bus->write = smsc911x_mii_write;
1090 
1091         pdata->mii_bus->parent = &pdev->dev;
1092 
1093         switch (pdata->idrev & 0xFFFF0000) {
1094         case 0x01170000:
1095         case 0x01150000:
1096         case 0x117A0000:
1097         case 0x115A0000:
1098                 /* External PHY supported, try to autodetect */
1099                 smsc911x_phy_initialise_external(pdata);
1100                 break;
1101         default:
1102                 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1103                            "using internal PHY");
1104                 pdata->using_extphy = 0;
1105                 break;
1106         }
1107 
1108         if (!pdata->using_extphy) {
1109                 /* Mask all PHYs except ID 1 (internal) */
1110                 pdata->mii_bus->phy_mask = ~(1 << 1);
1111         }
1112 
1113         if (mdiobus_register(pdata->mii_bus)) {
1114                 SMSC_WARN(pdata, probe, "Error registering mii bus");
1115                 goto err_out_free_bus_2;
1116         }
1117 
1118         return 0;
1119 
1120 err_out_free_bus_2:
1121         mdiobus_free(pdata->mii_bus);
1122 err_out_1:
1123         return err;
1124 }
1125 
1126 /* Gets the number of tx statuses in the fifo */
1127 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1128 {
1129         return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1130                 & TX_FIFO_INF_TSUSED_) >> 16;
1131 }
1132 
1133 /* Reads tx statuses and increments counters where necessary */
1134 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1135 {
1136         struct smsc911x_data *pdata = netdev_priv(dev);
1137         unsigned int tx_stat;
1138 
1139         while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1140                 if (unlikely(tx_stat & 0x80000000)) {
1141                         /* In this driver the packet tag is used as the packet
1142                          * length. Since a packet length can never reach the
1143                          * size of 0x8000, this bit is reserved. It is worth
1144                          * noting that the "reserved bit" in the warning above
1145                          * does not reference a hardware defined reserved bit
1146                          * but rather a driver defined one.
1147                          */
1148                         SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1149                 } else {
1150                         if (unlikely(tx_stat & TX_STS_ES_)) {
1151                                 dev->stats.tx_errors++;
1152                         } else {
1153                                 dev->stats.tx_packets++;
1154                                 dev->stats.tx_bytes += (tx_stat >> 16);
1155                         }
1156                         if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1157                                 dev->stats.collisions += 16;
1158                                 dev->stats.tx_aborted_errors += 1;
1159                         } else {
1160                                 dev->stats.collisions +=
1161                                     ((tx_stat >> 3) & 0xF);
1162                         }
1163                         if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1164                                 dev->stats.tx_carrier_errors += 1;
1165                         if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1166                                 dev->stats.collisions++;
1167                                 dev->stats.tx_aborted_errors++;
1168                         }
1169                 }
1170         }
1171 }
1172 
1173 /* Increments the Rx error counters */
1174 static void
1175 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1176 {
1177         int crc_err = 0;
1178 
1179         if (unlikely(rxstat & RX_STS_ES_)) {
1180                 dev->stats.rx_errors++;
1181                 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1182                         dev->stats.rx_crc_errors++;
1183                         crc_err = 1;
1184                 }
1185         }
1186         if (likely(!crc_err)) {
1187                 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1188                              (rxstat & RX_STS_LENGTH_ERR_)))
1189                         dev->stats.rx_length_errors++;
1190                 if (rxstat & RX_STS_MCAST_)
1191                         dev->stats.multicast++;
1192         }
1193 }
1194 
1195 /* Quickly dumps bad packets */
1196 static void
1197 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1198 {
1199         if (likely(pktwords >= 4)) {
1200                 unsigned int timeout = 500;
1201                 unsigned int val;
1202                 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1203                 do {
1204                         udelay(1);
1205                         val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1206                 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1207 
1208                 if (unlikely(timeout == 0))
1209                         SMSC_WARN(pdata, hw, "Timed out waiting for "
1210                                   "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1211         } else {
1212                 unsigned int temp;
1213                 while (pktwords--)
1214                         temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1215         }
1216 }
1217 
1218 /* NAPI poll function */
1219 static int smsc911x_poll(struct napi_struct *napi, int budget)
1220 {
1221         struct smsc911x_data *pdata =
1222                 container_of(napi, struct smsc911x_data, napi);
1223         struct net_device *dev = pdata->dev;
1224         int npackets = 0;
1225 
1226         while (npackets < budget) {
1227                 unsigned int pktlength;
1228                 unsigned int pktwords;
1229                 struct sk_buff *skb;
1230                 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1231 
1232                 if (!rxstat) {
1233                         unsigned int temp;
1234                         /* We processed all packets available.  Tell NAPI it can
1235                          * stop polling then re-enable rx interrupts */
1236                         smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1237                         napi_complete(napi);
1238                         temp = smsc911x_reg_read(pdata, INT_EN);
1239                         temp |= INT_EN_RSFL_EN_;
1240                         smsc911x_reg_write(pdata, INT_EN, temp);
1241                         break;
1242                 }
1243 
1244                 /* Count packet for NAPI scheduling, even if it has an error.
1245                  * Error packets still require cycles to discard */
1246                 npackets++;
1247 
1248                 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1249                 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1250                 smsc911x_rx_counterrors(dev, rxstat);
1251 
1252                 if (unlikely(rxstat & RX_STS_ES_)) {
1253                         SMSC_WARN(pdata, rx_err,
1254                                   "Discarding packet with error bit set");
1255                         /* Packet has an error, discard it and continue with
1256                          * the next */
1257                         smsc911x_rx_fastforward(pdata, pktwords);
1258                         dev->stats.rx_dropped++;
1259                         continue;
1260                 }
1261 
1262                 skb = netdev_alloc_skb(dev, pktwords << 2);
1263                 if (unlikely(!skb)) {
1264                         SMSC_WARN(pdata, rx_err,
1265                                   "Unable to allocate skb for rx packet");
1266                         /* Drop the packet and stop this polling iteration */
1267                         smsc911x_rx_fastforward(pdata, pktwords);
1268                         dev->stats.rx_dropped++;
1269                         break;
1270                 }
1271 
1272                 pdata->ops->rx_readfifo(pdata,
1273                                  (unsigned int *)skb->data, pktwords);
1274 
1275                 /* Align IP on 16B boundary */
1276                 skb_reserve(skb, NET_IP_ALIGN);
1277                 skb_put(skb, pktlength - 4);
1278                 skb->protocol = eth_type_trans(skb, dev);
1279                 skb_checksum_none_assert(skb);
1280                 netif_receive_skb(skb);
1281 
1282                 /* Update counters */
1283                 dev->stats.rx_packets++;
1284                 dev->stats.rx_bytes += (pktlength - 4);
1285         }
1286 
1287         /* Return total received packets */
1288         return npackets;
1289 }
1290 
1291 /* Returns hash bit number for given MAC address
1292  * Example:
1293  * 01 00 5E 00 00 01 -> returns bit number 31 */
1294 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1295 {
1296         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1297 }
1298 
1299 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1300 {
1301         /* Performs the multicast & mac_cr update.  This is called when
1302          * safe on the current hardware, and with the mac_lock held */
1303         unsigned int mac_cr;
1304 
1305         SMSC_ASSERT_MAC_LOCK(pdata);
1306 
1307         mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1308         mac_cr |= pdata->set_bits_mask;
1309         mac_cr &= ~(pdata->clear_bits_mask);
1310         smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1311         smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1312         smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1313         SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1314                    mac_cr, pdata->hashhi, pdata->hashlo);
1315 }
1316 
1317 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1318 {
1319         unsigned int mac_cr;
1320 
1321         /* This function is only called for older LAN911x devices
1322          * (revA or revB), where MAC_CR, HASHH and HASHL should not
1323          * be modified during Rx - newer devices immediately update the
1324          * registers.
1325          *
1326          * This is called from interrupt context */
1327 
1328         spin_lock(&pdata->mac_lock);
1329 
1330         /* Check Rx has stopped */
1331         if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1332                 SMSC_WARN(pdata, drv, "Rx not stopped");
1333 
1334         /* Perform the update - safe to do now Rx has stopped */
1335         smsc911x_rx_multicast_update(pdata);
1336 
1337         /* Re-enable Rx */
1338         mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1339         mac_cr |= MAC_CR_RXEN_;
1340         smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1341 
1342         pdata->multicast_update_pending = 0;
1343 
1344         spin_unlock(&pdata->mac_lock);
1345 }
1346 
1347 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1348 {
1349         struct net_device *ndev = pdata->dev;
1350         struct phy_device *phy_dev = ndev->phydev;
1351         int rc = 0;
1352 
1353         if (!phy_dev)
1354                 return rc;
1355 
1356         /* If the internal PHY is in General Power-Down mode, all, except the
1357          * management interface, is powered-down and stays in that condition as
1358          * long as Phy register bit 0.11 is HIGH.
1359          *
1360          * In that case, clear the bit 0.11, so the PHY powers up and we can
1361          * access to the phy registers.
1362          */
1363         rc = phy_read(phy_dev, MII_BMCR);
1364         if (rc < 0) {
1365                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1366                 return rc;
1367         }
1368 
1369         /* If the PHY general power-down bit is not set is not necessary to
1370          * disable the general power down-mode.
1371          */
1372         if (rc & BMCR_PDOWN) {
1373                 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1374                 if (rc < 0) {
1375                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1376                         return rc;
1377                 }
1378 
1379                 usleep_range(1000, 1500);
1380         }
1381 
1382         return 0;
1383 }
1384 
1385 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1386 {
1387         struct net_device *ndev = pdata->dev;
1388         struct phy_device *phy_dev = ndev->phydev;
1389         int rc = 0;
1390 
1391         if (!phy_dev)
1392                 return rc;
1393 
1394         rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1395 
1396         if (rc < 0) {
1397                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1398                 return rc;
1399         }
1400 
1401         /* Only disable if energy detect mode is already enabled */
1402         if (rc & MII_LAN83C185_EDPWRDOWN) {
1403                 /* Disable energy detect mode for this SMSC Transceivers */
1404                 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1405                                rc & (~MII_LAN83C185_EDPWRDOWN));
1406 
1407                 if (rc < 0) {
1408                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1409                         return rc;
1410                 }
1411                 /* Allow PHY to wakeup */
1412                 mdelay(2);
1413         }
1414 
1415         return 0;
1416 }
1417 
1418 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1419 {
1420         struct net_device *ndev = pdata->dev;
1421         struct phy_device *phy_dev = ndev->phydev;
1422         int rc = 0;
1423 
1424         if (!phy_dev)
1425                 return rc;
1426 
1427         rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1428 
1429         if (rc < 0) {
1430                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1431                 return rc;
1432         }
1433 
1434         /* Only enable if energy detect mode is already disabled */
1435         if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1436                 /* Enable energy detect mode for this SMSC Transceivers */
1437                 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1438                                rc | MII_LAN83C185_EDPWRDOWN);
1439 
1440                 if (rc < 0) {
1441                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1442                         return rc;
1443                 }
1444         }
1445         return 0;
1446 }
1447 
1448 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1449 {
1450         unsigned int timeout;
1451         unsigned int temp;
1452         int ret;
1453 
1454         /*
1455          * Make sure to power-up the PHY chip before doing a reset, otherwise
1456          * the reset fails.
1457          */
1458         ret = smsc911x_phy_general_power_up(pdata);
1459         if (ret) {
1460                 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1461                 return ret;
1462         }
1463 
1464         /*
1465          * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1466          * are initialized in a Energy Detect Power-Down mode that prevents
1467          * the MAC chip to be software reseted. So we have to wakeup the PHY
1468          * before.
1469          */
1470         if (pdata->generation == 4) {
1471                 ret = smsc911x_phy_disable_energy_detect(pdata);
1472 
1473                 if (ret) {
1474                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1475                         return ret;
1476                 }
1477         }
1478 
1479         /* Reset the LAN911x */
1480         smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1481         timeout = 10;
1482         do {
1483                 udelay(10);
1484                 temp = smsc911x_reg_read(pdata, HW_CFG);
1485         } while ((--timeout) && (temp & HW_CFG_SRST_));
1486 
1487         if (unlikely(temp & HW_CFG_SRST_)) {
1488                 SMSC_WARN(pdata, drv, "Failed to complete reset");
1489                 return -EIO;
1490         }
1491 
1492         if (pdata->generation == 4) {
1493                 ret = smsc911x_phy_enable_energy_detect(pdata);
1494 
1495                 if (ret) {
1496                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1497                         return ret;
1498                 }
1499         }
1500 
1501         return 0;
1502 }
1503 
1504 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1505 static void
1506 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1507 {
1508         u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1509         u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1510             (dev_addr[1] << 8) | dev_addr[0];
1511 
1512         SMSC_ASSERT_MAC_LOCK(pdata);
1513 
1514         smsc911x_mac_write(pdata, ADDRH, mac_high16);
1515         smsc911x_mac_write(pdata, ADDRL, mac_low32);
1516 }
1517 
1518 static void smsc911x_disable_irq_chip(struct net_device *dev)
1519 {
1520         struct smsc911x_data *pdata = netdev_priv(dev);
1521 
1522         smsc911x_reg_write(pdata, INT_EN, 0);
1523         smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1524 }
1525 
1526 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1527 {
1528         struct net_device *dev = dev_id;
1529         struct smsc911x_data *pdata = netdev_priv(dev);
1530         u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1531         u32 inten = smsc911x_reg_read(pdata, INT_EN);
1532         int serviced = IRQ_NONE;
1533         u32 temp;
1534 
1535         if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1536                 temp = smsc911x_reg_read(pdata, INT_EN);
1537                 temp &= (~INT_EN_SW_INT_EN_);
1538                 smsc911x_reg_write(pdata, INT_EN, temp);
1539                 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1540                 pdata->software_irq_signal = 1;
1541                 smp_wmb();
1542                 serviced = IRQ_HANDLED;
1543         }
1544 
1545         if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1546                 /* Called when there is a multicast update scheduled and
1547                  * it is now safe to complete the update */
1548                 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1549                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1550                 if (pdata->multicast_update_pending)
1551                         smsc911x_rx_multicast_update_workaround(pdata);
1552                 serviced = IRQ_HANDLED;
1553         }
1554 
1555         if (intsts & inten & INT_STS_TDFA_) {
1556                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1557                 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1558                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1559                 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1560                 netif_wake_queue(dev);
1561                 serviced = IRQ_HANDLED;
1562         }
1563 
1564         if (unlikely(intsts & inten & INT_STS_RXE_)) {
1565                 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1566                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1567                 serviced = IRQ_HANDLED;
1568         }
1569 
1570         if (likely(intsts & inten & INT_STS_RSFL_)) {
1571                 if (likely(napi_schedule_prep(&pdata->napi))) {
1572                         /* Disable Rx interrupts */
1573                         temp = smsc911x_reg_read(pdata, INT_EN);
1574                         temp &= (~INT_EN_RSFL_EN_);
1575                         smsc911x_reg_write(pdata, INT_EN, temp);
1576                         /* Schedule a NAPI poll */
1577                         __napi_schedule(&pdata->napi);
1578                 } else {
1579                         SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1580                 }
1581                 serviced = IRQ_HANDLED;
1582         }
1583 
1584         return serviced;
1585 }
1586 
1587 static int smsc911x_open(struct net_device *dev)
1588 {
1589         struct smsc911x_data *pdata = netdev_priv(dev);
1590         unsigned int timeout;
1591         unsigned int temp;
1592         unsigned int intcfg;
1593         int retval;
1594         int irq_flags;
1595 
1596         /* find and start the given phy */
1597         if (!dev->phydev) {
1598                 retval = smsc911x_mii_probe(dev);
1599                 if (retval < 0) {
1600                         SMSC_WARN(pdata, probe, "Error starting phy");
1601                         goto out;
1602                 }
1603         }
1604 
1605         /* Reset the LAN911x */
1606         retval = smsc911x_soft_reset(pdata);
1607         if (retval) {
1608                 SMSC_WARN(pdata, hw, "soft reset failed");
1609                 goto mii_free_out;
1610         }
1611 
1612         smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1613         smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1614 
1615         /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1616         spin_lock_irq(&pdata->mac_lock);
1617         smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1618         spin_unlock_irq(&pdata->mac_lock);
1619 
1620         /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1621         timeout = 50;
1622         while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1623                --timeout) {
1624                 udelay(10);
1625         }
1626 
1627         if (unlikely(timeout == 0))
1628                 SMSC_WARN(pdata, ifup,
1629                           "Timed out waiting for EEPROM busy bit to clear");
1630 
1631         smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1632 
1633         /* The soft reset above cleared the device's MAC address,
1634          * restore it from local copy (set in probe) */
1635         spin_lock_irq(&pdata->mac_lock);
1636         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1637         spin_unlock_irq(&pdata->mac_lock);
1638 
1639         /* Initialise irqs, but leave all sources disabled */
1640         smsc911x_disable_irq_chip(dev);
1641 
1642         /* Set interrupt deassertion to 100uS */
1643         intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1644 
1645         if (pdata->config.irq_polarity) {
1646                 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1647                 intcfg |= INT_CFG_IRQ_POL_;
1648         } else {
1649                 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1650         }
1651 
1652         if (pdata->config.irq_type) {
1653                 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1654                 intcfg |= INT_CFG_IRQ_TYPE_;
1655         } else {
1656                 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1657         }
1658 
1659         smsc911x_reg_write(pdata, INT_CFG, intcfg);
1660 
1661         SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1662         pdata->software_irq_signal = 0;
1663         smp_wmb();
1664 
1665         irq_flags = irq_get_trigger_type(dev->irq);
1666         retval = request_irq(dev->irq, smsc911x_irqhandler,
1667                              irq_flags | IRQF_SHARED, dev->name, dev);
1668         if (retval) {
1669                 SMSC_WARN(pdata, probe,
1670                           "Unable to claim requested irq: %d", dev->irq);
1671                 goto mii_free_out;
1672         }
1673 
1674         temp = smsc911x_reg_read(pdata, INT_EN);
1675         temp |= INT_EN_SW_INT_EN_;
1676         smsc911x_reg_write(pdata, INT_EN, temp);
1677 
1678         timeout = 1000;
1679         while (timeout--) {
1680                 if (pdata->software_irq_signal)
1681                         break;
1682                 msleep(1);
1683         }
1684 
1685         if (!pdata->software_irq_signal) {
1686                 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1687                             dev->irq);
1688                 retval = -ENODEV;
1689                 goto irq_stop_out;
1690         }
1691         SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1692                    dev->irq);
1693 
1694         netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1695                     (unsigned long)pdata->ioaddr, dev->irq);
1696 
1697         /* Reset the last known duplex and carrier */
1698         pdata->last_duplex = -1;
1699         pdata->last_carrier = -1;
1700 
1701         /* Bring the PHY up */
1702         phy_start(dev->phydev);
1703 
1704         temp = smsc911x_reg_read(pdata, HW_CFG);
1705         /* Preserve TX FIFO size and external PHY configuration */
1706         temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1707         temp |= HW_CFG_SF_;
1708         smsc911x_reg_write(pdata, HW_CFG, temp);
1709 
1710         temp = smsc911x_reg_read(pdata, FIFO_INT);
1711         temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1712         temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1713         smsc911x_reg_write(pdata, FIFO_INT, temp);
1714 
1715         /* set RX Data offset to 2 bytes for alignment */
1716         smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1717 
1718         /* enable NAPI polling before enabling RX interrupts */
1719         napi_enable(&pdata->napi);
1720 
1721         temp = smsc911x_reg_read(pdata, INT_EN);
1722         temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1723         smsc911x_reg_write(pdata, INT_EN, temp);
1724 
1725         spin_lock_irq(&pdata->mac_lock);
1726         temp = smsc911x_mac_read(pdata, MAC_CR);
1727         temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1728         smsc911x_mac_write(pdata, MAC_CR, temp);
1729         spin_unlock_irq(&pdata->mac_lock);
1730 
1731         smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1732 
1733         netif_start_queue(dev);
1734         return 0;
1735 
1736 irq_stop_out:
1737         free_irq(dev->irq, dev);
1738 mii_free_out:
1739         phy_disconnect(dev->phydev);
1740         dev->phydev = NULL;
1741 out:
1742         return retval;
1743 }
1744 
1745 /* Entry point for stopping the interface */
1746 static int smsc911x_stop(struct net_device *dev)
1747 {
1748         struct smsc911x_data *pdata = netdev_priv(dev);
1749         unsigned int temp;
1750 
1751         /* Disable all device interrupts */
1752         temp = smsc911x_reg_read(pdata, INT_CFG);
1753         temp &= ~INT_CFG_IRQ_EN_;
1754         smsc911x_reg_write(pdata, INT_CFG, temp);
1755 
1756         /* Stop Tx and Rx polling */
1757         netif_stop_queue(dev);
1758         napi_disable(&pdata->napi);
1759 
1760         /* At this point all Rx and Tx activity is stopped */
1761         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1762         smsc911x_tx_update_txcounters(dev);
1763 
1764         free_irq(dev->irq, dev);
1765 
1766         /* Bring the PHY down */
1767         if (dev->phydev) {
1768                 phy_stop(dev->phydev);
1769                 phy_disconnect(dev->phydev);
1770                 dev->phydev = NULL;
1771         }
1772         netif_carrier_off(dev);
1773 
1774         SMSC_TRACE(pdata, ifdown, "Interface stopped");
1775         return 0;
1776 }
1777 
1778 /* Entry point for transmitting a packet */
1779 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1780 {
1781         struct smsc911x_data *pdata = netdev_priv(dev);
1782         unsigned int freespace;
1783         unsigned int tx_cmd_a;
1784         unsigned int tx_cmd_b;
1785         unsigned int temp;
1786         u32 wrsz;
1787         ulong bufp;
1788 
1789         freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1790 
1791         if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1792                 SMSC_WARN(pdata, tx_err,
1793                           "Tx data fifo low, space available: %d", freespace);
1794 
1795         /* Word alignment adjustment */
1796         tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1797         tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1798         tx_cmd_a |= (unsigned int)skb->len;
1799 
1800         tx_cmd_b = ((unsigned int)skb->len) << 16;
1801         tx_cmd_b |= (unsigned int)skb->len;
1802 
1803         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1804         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1805 
1806         bufp = (ulong)skb->data & (~0x3);
1807         wrsz = (u32)skb->len + 3;
1808         wrsz += (u32)((ulong)skb->data & 0x3);
1809         wrsz >>= 2;
1810 
1811         pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1812         freespace -= (skb->len + 32);
1813         skb_tx_timestamp(skb);
1814         dev_consume_skb_any(skb);
1815 
1816         if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1817                 smsc911x_tx_update_txcounters(dev);
1818 
1819         if (freespace < TX_FIFO_LOW_THRESHOLD) {
1820                 netif_stop_queue(dev);
1821                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1822                 temp &= 0x00FFFFFF;
1823                 temp |= 0x32000000;
1824                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1825         }
1826 
1827         return NETDEV_TX_OK;
1828 }
1829 
1830 /* Entry point for getting status counters */
1831 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1832 {
1833         struct smsc911x_data *pdata = netdev_priv(dev);
1834         smsc911x_tx_update_txcounters(dev);
1835         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1836         return &dev->stats;
1837 }
1838 
1839 /* Entry point for setting addressing modes */
1840 static void smsc911x_set_multicast_list(struct net_device *dev)
1841 {
1842         struct smsc911x_data *pdata = netdev_priv(dev);
1843         unsigned long flags;
1844 
1845         if (dev->flags & IFF_PROMISC) {
1846                 /* Enabling promiscuous mode */
1847                 pdata->set_bits_mask = MAC_CR_PRMS_;
1848                 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1849                 pdata->hashhi = 0;
1850                 pdata->hashlo = 0;
1851         } else if (dev->flags & IFF_ALLMULTI) {
1852                 /* Enabling all multicast mode */
1853                 pdata->set_bits_mask = MAC_CR_MCPAS_;
1854                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1855                 pdata->hashhi = 0;
1856                 pdata->hashlo = 0;
1857         } else if (!netdev_mc_empty(dev)) {
1858                 /* Enabling specific multicast addresses */
1859                 unsigned int hash_high = 0;
1860                 unsigned int hash_low = 0;
1861                 struct netdev_hw_addr *ha;
1862 
1863                 pdata->set_bits_mask = MAC_CR_HPFILT_;
1864                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1865 
1866                 netdev_for_each_mc_addr(ha, dev) {
1867                         unsigned int bitnum = smsc911x_hash(ha->addr);
1868                         unsigned int mask = 0x01 << (bitnum & 0x1F);
1869 
1870                         if (bitnum & 0x20)
1871                                 hash_high |= mask;
1872                         else
1873                                 hash_low |= mask;
1874                 }
1875 
1876                 pdata->hashhi = hash_high;
1877                 pdata->hashlo = hash_low;
1878         } else {
1879                 /* Enabling local MAC address only */
1880                 pdata->set_bits_mask = 0;
1881                 pdata->clear_bits_mask =
1882                     (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1883                 pdata->hashhi = 0;
1884                 pdata->hashlo = 0;
1885         }
1886 
1887         spin_lock_irqsave(&pdata->mac_lock, flags);
1888 
1889         if (pdata->generation <= 1) {
1890                 /* Older hardware revision - cannot change these flags while
1891                  * receiving data */
1892                 if (!pdata->multicast_update_pending) {
1893                         unsigned int temp;
1894                         SMSC_TRACE(pdata, hw, "scheduling mcast update");
1895                         pdata->multicast_update_pending = 1;
1896 
1897                         /* Request the hardware to stop, then perform the
1898                          * update when we get an RX_STOP interrupt */
1899                         temp = smsc911x_mac_read(pdata, MAC_CR);
1900                         temp &= ~(MAC_CR_RXEN_);
1901                         smsc911x_mac_write(pdata, MAC_CR, temp);
1902                 } else {
1903                         /* There is another update pending, this should now
1904                          * use the newer values */
1905                 }
1906         } else {
1907                 /* Newer hardware revision - can write immediately */
1908                 smsc911x_rx_multicast_update(pdata);
1909         }
1910 
1911         spin_unlock_irqrestore(&pdata->mac_lock, flags);
1912 }
1913 
1914 #ifdef CONFIG_NET_POLL_CONTROLLER
1915 static void smsc911x_poll_controller(struct net_device *dev)
1916 {
1917         disable_irq(dev->irq);
1918         smsc911x_irqhandler(0, dev);
1919         enable_irq(dev->irq);
1920 }
1921 #endif                          /* CONFIG_NET_POLL_CONTROLLER */
1922 
1923 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1924 {
1925         struct smsc911x_data *pdata = netdev_priv(dev);
1926         struct sockaddr *addr = p;
1927 
1928         /* On older hardware revisions we cannot change the mac address
1929          * registers while receiving data.  Newer devices can safely change
1930          * this at any time. */
1931         if (pdata->generation <= 1 && netif_running(dev))
1932                 return -EBUSY;
1933 
1934         if (!is_valid_ether_addr(addr->sa_data))
1935                 return -EADDRNOTAVAIL;
1936 
1937         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1938 
1939         spin_lock_irq(&pdata->mac_lock);
1940         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1941         spin_unlock_irq(&pdata->mac_lock);
1942 
1943         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1944 
1945         return 0;
1946 }
1947 
1948 /* Standard ioctls for mii-tool */
1949 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1950 {
1951         if (!netif_running(dev) || !dev->phydev)
1952                 return -EINVAL;
1953 
1954         return phy_mii_ioctl(dev->phydev, ifr, cmd);
1955 }
1956 
1957 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1958                                         struct ethtool_drvinfo *info)
1959 {
1960         strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1961         strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1962         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1963                 sizeof(info->bus_info));
1964 }
1965 
1966 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1967 {
1968         struct smsc911x_data *pdata = netdev_priv(dev);
1969         return pdata->msg_enable;
1970 }
1971 
1972 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1973 {
1974         struct smsc911x_data *pdata = netdev_priv(dev);
1975         pdata->msg_enable = level;
1976 }
1977 
1978 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1979 {
1980         return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1981             sizeof(u32);
1982 }
1983 
1984 static void
1985 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1986                          void *buf)
1987 {
1988         struct smsc911x_data *pdata = netdev_priv(dev);
1989         struct phy_device *phy_dev = dev->phydev;
1990         unsigned long flags;
1991         unsigned int i;
1992         unsigned int j = 0;
1993         u32 *data = buf;
1994 
1995         regs->version = pdata->idrev;
1996         for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1997                 data[j++] = smsc911x_reg_read(pdata, i);
1998 
1999         for (i = MAC_CR; i <= WUCSR; i++) {
2000                 spin_lock_irqsave(&pdata->mac_lock, flags);
2001                 data[j++] = smsc911x_mac_read(pdata, i);
2002                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
2003         }
2004 
2005         for (i = 0; i <= 31; i++)
2006                 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
2007                                               phy_dev->mdio.addr, i);
2008 }
2009 
2010 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2011 {
2012         unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2013         temp &= ~GPIO_CFG_EEPR_EN_;
2014         smsc911x_reg_write(pdata, GPIO_CFG, temp);
2015         msleep(1);
2016 }
2017 
2018 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2019 {
2020         int timeout = 100;
2021         u32 e2cmd;
2022 
2023         SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2024         if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2025                 SMSC_WARN(pdata, drv, "Busy at start");
2026                 return -EBUSY;
2027         }
2028 
2029         e2cmd = op | E2P_CMD_EPC_BUSY_;
2030         smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2031 
2032         do {
2033                 msleep(1);
2034                 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2035         } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2036 
2037         if (!timeout) {
2038                 SMSC_TRACE(pdata, drv, "TIMED OUT");
2039                 return -EAGAIN;
2040         }
2041 
2042         if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2043                 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2044                 return -EINVAL;
2045         }
2046 
2047         return 0;
2048 }
2049 
2050 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2051                                          u8 address, u8 *data)
2052 {
2053         u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2054         int ret;
2055 
2056         SMSC_TRACE(pdata, drv, "address 0x%x", address);
2057         ret = smsc911x_eeprom_send_cmd(pdata, op);
2058 
2059         if (!ret)
2060                 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2061 
2062         return ret;
2063 }
2064 
2065 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2066                                           u8 address, u8 data)
2067 {
2068         u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2069         u32 temp;
2070         int ret;
2071 
2072         SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2073         ret = smsc911x_eeprom_send_cmd(pdata, op);
2074 
2075         if (!ret) {
2076                 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2077                 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2078 
2079                 /* Workaround for hardware read-after-write restriction */
2080                 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2081 
2082                 ret = smsc911x_eeprom_send_cmd(pdata, op);
2083         }
2084 
2085         return ret;
2086 }
2087 
2088 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2089 {
2090         return SMSC911X_EEPROM_SIZE;
2091 }
2092 
2093 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2094                                        struct ethtool_eeprom *eeprom, u8 *data)
2095 {
2096         struct smsc911x_data *pdata = netdev_priv(dev);
2097         u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2098         int len;
2099         int i;
2100 
2101         smsc911x_eeprom_enable_access(pdata);
2102 
2103         len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2104         for (i = 0; i < len; i++) {
2105                 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2106                 if (ret < 0) {
2107                         eeprom->len = 0;
2108                         return ret;
2109                 }
2110         }
2111 
2112         memcpy(data, &eeprom_data[eeprom->offset], len);
2113         eeprom->len = len;
2114         return 0;
2115 }
2116 
2117 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2118                                        struct ethtool_eeprom *eeprom, u8 *data)
2119 {
2120         int ret;
2121         struct smsc911x_data *pdata = netdev_priv(dev);
2122 
2123         smsc911x_eeprom_enable_access(pdata);
2124         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2125         ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2126         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2127 
2128         /* Single byte write, according to man page */
2129         eeprom->len = 1;
2130 
2131         return ret;
2132 }
2133 
2134 static const struct ethtool_ops smsc911x_ethtool_ops = {
2135         .get_link = ethtool_op_get_link,
2136         .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2137         .nway_reset = phy_ethtool_nway_reset,
2138         .get_msglevel = smsc911x_ethtool_getmsglevel,
2139         .set_msglevel = smsc911x_ethtool_setmsglevel,
2140         .get_regs_len = smsc911x_ethtool_getregslen,
2141         .get_regs = smsc911x_ethtool_getregs,
2142         .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2143         .get_eeprom = smsc911x_ethtool_get_eeprom,
2144         .set_eeprom = smsc911x_ethtool_set_eeprom,
2145         .get_ts_info = ethtool_op_get_ts_info,
2146         .get_link_ksettings = phy_ethtool_get_link_ksettings,
2147         .set_link_ksettings = phy_ethtool_set_link_ksettings,
2148 };
2149 
2150 static const struct net_device_ops smsc911x_netdev_ops = {
2151         .ndo_open               = smsc911x_open,
2152         .ndo_stop               = smsc911x_stop,
2153         .ndo_start_xmit         = smsc911x_hard_start_xmit,
2154         .ndo_get_stats          = smsc911x_get_stats,
2155         .ndo_set_rx_mode        = smsc911x_set_multicast_list,
2156         .ndo_do_ioctl           = smsc911x_do_ioctl,
2157         .ndo_validate_addr      = eth_validate_addr,
2158         .ndo_set_mac_address    = smsc911x_set_mac_address,
2159 #ifdef CONFIG_NET_POLL_CONTROLLER
2160         .ndo_poll_controller    = smsc911x_poll_controller,
2161 #endif
2162 };
2163 
2164 /* copies the current mac address from hardware to dev->dev_addr */
2165 static void smsc911x_read_mac_address(struct net_device *dev)
2166 {
2167         struct smsc911x_data *pdata = netdev_priv(dev);
2168         u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2169         u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2170 
2171         dev->dev_addr[0] = (u8)(mac_low32);
2172         dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2173         dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2174         dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2175         dev->dev_addr[4] = (u8)(mac_high16);
2176         dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2177 }
2178 
2179 /* Initializing private device structures, only called from probe */
2180 static int smsc911x_init(struct net_device *dev)
2181 {
2182         struct smsc911x_data *pdata = netdev_priv(dev);
2183         unsigned int byte_test, mask;
2184         unsigned int to = 100;
2185 
2186         SMSC_TRACE(pdata, probe, "Driver Parameters:");
2187         SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2188                    (unsigned long)pdata->ioaddr);
2189         SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2190         SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2191 
2192         spin_lock_init(&pdata->dev_lock);
2193         spin_lock_init(&pdata->mac_lock);
2194 
2195         if (pdata->ioaddr == NULL) {
2196                 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2197                 return -ENODEV;
2198         }
2199 
2200         /*
2201          * poll the READY bit in PMT_CTRL. Any other access to the device is
2202          * forbidden while this bit isn't set. Try for 100ms
2203          *
2204          * Note that this test is done before the WORD_SWAP register is
2205          * programmed. So in some configurations the READY bit is at 16 before
2206          * WORD_SWAP is written to. This issue is worked around by waiting
2207          * until either bit 0 or bit 16 gets set in PMT_CTRL.
2208          *
2209          * SMSC has confirmed that checking bit 16 (marked as reserved in
2210          * the datasheet) is fine since these bits "will either never be set
2211          * or can only go high after READY does (so also indicate the device
2212          * is ready)".
2213          */
2214 
2215         mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2216         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2217                 udelay(1000);
2218 
2219         if (to == 0) {
2220                 netdev_err(dev, "Device not READY in 100ms aborting\n");
2221                 return -ENODEV;
2222         }
2223 
2224         /* Check byte ordering */
2225         byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2226         SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2227         if (byte_test == 0x43218765) {
2228                 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2229                            "applying WORD_SWAP");
2230                 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2231 
2232                 /* 1 dummy read of BYTE_TEST is needed after a write to
2233                  * WORD_SWAP before its contents are valid */
2234                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2235 
2236                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2237         }
2238 
2239         if (byte_test != 0x87654321) {
2240                 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2241                 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2242                         SMSC_WARN(pdata, probe,
2243                                   "top 16 bits equal to bottom 16 bits");
2244                         SMSC_TRACE(pdata, probe,
2245                                    "This may mean the chip is set "
2246                                    "for 32 bit while the bus is reading 16 bit");
2247                 }
2248                 return -ENODEV;
2249         }
2250 
2251         /* Default generation to zero (all workarounds apply) */
2252         pdata->generation = 0;
2253 
2254         pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2255         switch (pdata->idrev & 0xFFFF0000) {
2256         case 0x01180000:
2257         case 0x01170000:
2258         case 0x01160000:
2259         case 0x01150000:
2260         case 0x218A0000:
2261                 /* LAN911[5678] family */
2262                 pdata->generation = pdata->idrev & 0x0000FFFF;
2263                 break;
2264 
2265         case 0x118A0000:
2266         case 0x117A0000:
2267         case 0x116A0000:
2268         case 0x115A0000:
2269                 /* LAN921[5678] family */
2270                 pdata->generation = 3;
2271                 break;
2272 
2273         case 0x92100000:
2274         case 0x92110000:
2275         case 0x92200000:
2276         case 0x92210000:
2277                 /* LAN9210/LAN9211/LAN9220/LAN9221 */
2278                 pdata->generation = 4;
2279                 break;
2280 
2281         default:
2282                 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2283                           pdata->idrev);
2284                 return -ENODEV;
2285         }
2286 
2287         SMSC_TRACE(pdata, probe,
2288                    "LAN911x identified, idrev: 0x%08X, generation: %d",
2289                    pdata->idrev, pdata->generation);
2290 
2291         if (pdata->generation == 0)
2292                 SMSC_WARN(pdata, probe,
2293                           "This driver is not intended for this chip revision");
2294 
2295         /* workaround for platforms without an eeprom, where the mac address
2296          * is stored elsewhere and set by the bootloader.  This saves the
2297          * mac address before resetting the device */
2298         if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2299                 spin_lock_irq(&pdata->mac_lock);
2300                 smsc911x_read_mac_address(dev);
2301                 spin_unlock_irq(&pdata->mac_lock);
2302         }
2303 
2304         /* Reset the LAN911x */
2305         if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2306                 return -ENODEV;
2307 
2308         dev->flags |= IFF_MULTICAST;
2309         netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2310         dev->netdev_ops = &smsc911x_netdev_ops;
2311         dev->ethtool_ops = &smsc911x_ethtool_ops;
2312 
2313         return 0;
2314 }
2315 
2316 static int smsc911x_drv_remove(struct platform_device *pdev)
2317 {
2318         struct net_device *dev;
2319         struct smsc911x_data *pdata;
2320         struct resource *res;
2321 
2322         dev = platform_get_drvdata(pdev);
2323         BUG_ON(!dev);
2324         pdata = netdev_priv(dev);
2325         BUG_ON(!pdata);
2326         BUG_ON(!pdata->ioaddr);
2327         WARN_ON(dev->phydev);
2328 
2329         SMSC_TRACE(pdata, ifdown, "Stopping driver");
2330 
2331         mdiobus_unregister(pdata->mii_bus);
2332         mdiobus_free(pdata->mii_bus);
2333 
2334         unregister_netdev(dev);
2335         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2336                                            "smsc911x-memory");
2337         if (!res)
2338                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2339 
2340         release_mem_region(res->start, resource_size(res));
2341 
2342         iounmap(pdata->ioaddr);
2343 
2344         (void)smsc911x_disable_resources(pdev);
2345         smsc911x_free_resources(pdev);
2346 
2347         free_netdev(dev);
2348 
2349         pm_runtime_put(&pdev->dev);
2350         pm_runtime_disable(&pdev->dev);
2351 
2352         return 0;
2353 }
2354 
2355 /* standard register acces */
2356 static const struct smsc911x_ops standard_smsc911x_ops = {
2357         .reg_read = __smsc911x_reg_read,
2358         .reg_write = __smsc911x_reg_write,
2359         .rx_readfifo = smsc911x_rx_readfifo,
2360         .tx_writefifo = smsc911x_tx_writefifo,
2361 };
2362 
2363 /* shifted register access */
2364 static const struct smsc911x_ops shifted_smsc911x_ops = {
2365         .reg_read = __smsc911x_reg_read_shift,
2366         .reg_write = __smsc911x_reg_write_shift,
2367         .rx_readfifo = smsc911x_rx_readfifo_shift,
2368         .tx_writefifo = smsc911x_tx_writefifo_shift,
2369 };
2370 
2371 static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2372                                  struct device *dev)
2373 {
2374         int phy_interface;
2375         u32 width = 0;
2376         int err;
2377 
2378         phy_interface = device_get_phy_mode(dev);
2379         if (phy_interface < 0)
2380                 phy_interface = PHY_INTERFACE_MODE_NA;
2381         config->phy_interface = phy_interface;
2382 
2383         device_get_mac_address(dev, config->mac, ETH_ALEN);
2384 
2385         err = device_property_read_u32(dev, "reg-io-width", &width);
2386         if (err == -ENXIO)
2387                 return err;
2388         if (!err && width == 4)
2389                 config->flags |= SMSC911X_USE_32BIT;
2390         else
2391                 config->flags |= SMSC911X_USE_16BIT;
2392 
2393         device_property_read_u32(dev, "reg-shift", &config->shift);
2394 
2395         if (device_property_present(dev, "smsc,irq-active-high"))
2396                 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2397 
2398         if (device_property_present(dev, "smsc,irq-push-pull"))
2399                 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2400 
2401         if (device_property_present(dev, "smsc,force-internal-phy"))
2402                 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2403 
2404         if (device_property_present(dev, "smsc,force-external-phy"))
2405                 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2406 
2407         if (device_property_present(dev, "smsc,save-mac-address"))
2408                 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2409 
2410         return 0;
2411 }
2412 
2413 static int smsc911x_drv_probe(struct platform_device *pdev)
2414 {
2415         struct net_device *dev;
2416         struct smsc911x_data *pdata;
2417         struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2418         struct resource *res;
2419         int res_size, irq;
2420         int retval;
2421 
2422         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2423                                            "smsc911x-memory");
2424         if (!res)
2425                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2426         if (!res) {
2427                 pr_warn("Could not allocate resource\n");
2428                 retval = -ENODEV;
2429                 goto out_0;
2430         }
2431         res_size = resource_size(res);
2432 
2433         irq = platform_get_irq(pdev, 0);
2434         if (irq == -EPROBE_DEFER) {
2435                 retval = -EPROBE_DEFER;
2436                 goto out_0;
2437         } else if (irq <= 0) {
2438                 pr_warn("Could not allocate irq resource\n");
2439                 retval = -ENODEV;
2440                 goto out_0;
2441         }
2442 
2443         if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2444                 retval = -EBUSY;
2445                 goto out_0;
2446         }
2447 
2448         dev = alloc_etherdev(sizeof(struct smsc911x_data));
2449         if (!dev) {
2450                 retval = -ENOMEM;
2451                 goto out_release_io_1;
2452         }
2453 
2454         SET_NETDEV_DEV(dev, &pdev->dev);
2455 
2456         pdata = netdev_priv(dev);
2457         dev->irq = irq;
2458         pdata->ioaddr = ioremap_nocache(res->start, res_size);
2459 
2460         pdata->dev = dev;
2461         pdata->msg_enable = ((1 << debug) - 1);
2462 
2463         platform_set_drvdata(pdev, dev);
2464 
2465         retval = smsc911x_request_resources(pdev);
2466         if (retval)
2467                 goto out_request_resources_fail;
2468 
2469         retval = smsc911x_enable_resources(pdev);
2470         if (retval)
2471                 goto out_enable_resources_fail;
2472 
2473         if (pdata->ioaddr == NULL) {
2474                 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2475                 retval = -ENOMEM;
2476                 goto out_disable_resources;
2477         }
2478 
2479         retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2480         if (retval && config) {
2481                 /* copy config parameters across to pdata */
2482                 memcpy(&pdata->config, config, sizeof(pdata->config));
2483                 retval = 0;
2484         }
2485 
2486         if (retval) {
2487                 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2488                 goto out_disable_resources;
2489         }
2490 
2491         /* assume standard, non-shifted, access to HW registers */
2492         pdata->ops = &standard_smsc911x_ops;
2493         /* apply the right access if shifting is needed */
2494         if (pdata->config.shift)
2495                 pdata->ops = &shifted_smsc911x_ops;
2496 
2497         pm_runtime_enable(&pdev->dev);
2498         pm_runtime_get_sync(&pdev->dev);
2499 
2500         retval = smsc911x_init(dev);
2501         if (retval < 0)
2502                 goto out_disable_resources;
2503 
2504         netif_carrier_off(dev);
2505 
2506         retval = smsc911x_mii_init(pdev, dev);
2507         if (retval) {
2508                 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2509                 goto out_disable_resources;
2510         }
2511 
2512         retval = register_netdev(dev);
2513         if (retval) {
2514                 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2515                 goto out_disable_resources;
2516         } else {
2517                 SMSC_TRACE(pdata, probe,
2518                            "Network interface: \"%s\"", dev->name);
2519         }
2520 
2521         spin_lock_irq(&pdata->mac_lock);
2522 
2523         /* Check if mac address has been specified when bringing interface up */
2524         if (is_valid_ether_addr(dev->dev_addr)) {
2525                 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2526                 SMSC_TRACE(pdata, probe,
2527                            "MAC Address is specified by configuration");
2528         } else if (is_valid_ether_addr(pdata->config.mac)) {
2529                 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2530                 SMSC_TRACE(pdata, probe,
2531                            "MAC Address specified by platform data");
2532         } else {
2533                 /* Try reading mac address from device. if EEPROM is present
2534                  * it will already have been set */
2535                 smsc_get_mac(dev);
2536 
2537                 if (is_valid_ether_addr(dev->dev_addr)) {
2538                         /* eeprom values are valid  so use them */
2539                         SMSC_TRACE(pdata, probe,
2540                                    "Mac Address is read from LAN911x EEPROM");
2541                 } else {
2542                         /* eeprom values are invalid, generate random MAC */
2543                         eth_hw_addr_random(dev);
2544                         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2545                         SMSC_TRACE(pdata, probe,
2546                                    "MAC Address is set to eth_random_addr");
2547                 }
2548         }
2549 
2550         spin_unlock_irq(&pdata->mac_lock);
2551 
2552         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2553 
2554         return 0;
2555 
2556 out_disable_resources:
2557         pm_runtime_put(&pdev->dev);
2558         pm_runtime_disable(&pdev->dev);
2559         (void)smsc911x_disable_resources(pdev);
2560 out_enable_resources_fail:
2561         smsc911x_free_resources(pdev);
2562 out_request_resources_fail:
2563         iounmap(pdata->ioaddr);
2564         free_netdev(dev);
2565 out_release_io_1:
2566         release_mem_region(res->start, resource_size(res));
2567 out_0:
2568         return retval;
2569 }
2570 
2571 #ifdef CONFIG_PM
2572 /* This implementation assumes the devices remains powered on its VDDVARIO
2573  * pins during suspend. */
2574 
2575 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2576 
2577 static int smsc911x_suspend(struct device *dev)
2578 {
2579         struct net_device *ndev = dev_get_drvdata(dev);
2580         struct smsc911x_data *pdata = netdev_priv(ndev);
2581 
2582         /* enable wake on LAN, energy detection and the external PME
2583          * signal. */
2584         smsc911x_reg_write(pdata, PMT_CTRL,
2585                 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2586                 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2587 
2588         pm_runtime_disable(dev);
2589         pm_runtime_set_suspended(dev);
2590 
2591         return 0;
2592 }
2593 
2594 static int smsc911x_resume(struct device *dev)
2595 {
2596         struct net_device *ndev = dev_get_drvdata(dev);
2597         struct smsc911x_data *pdata = netdev_priv(ndev);
2598         unsigned int to = 100;
2599 
2600         pm_runtime_enable(dev);
2601         pm_runtime_resume(dev);
2602 
2603         /* Note 3.11 from the datasheet:
2604          *      "When the LAN9220 is in a power saving state, a write of any
2605          *       data to the BYTE_TEST register will wake-up the device."
2606          */
2607         smsc911x_reg_write(pdata, BYTE_TEST, 0);
2608 
2609         /* poll the READY bit in PMT_CTRL. Any other access to the device is
2610          * forbidden while this bit isn't set. Try for 100ms and return -EIO
2611          * if it failed. */
2612         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2613                 udelay(1000);
2614 
2615         return (to == 0) ? -EIO : 0;
2616 }
2617 
2618 static const struct dev_pm_ops smsc911x_pm_ops = {
2619         .suspend        = smsc911x_suspend,
2620         .resume         = smsc911x_resume,
2621 };
2622 
2623 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2624 
2625 #else
2626 #define SMSC911X_PM_OPS NULL
2627 #endif
2628 
2629 #ifdef CONFIG_OF
2630 static const struct of_device_id smsc911x_dt_ids[] = {
2631         { .compatible = "smsc,lan9115", },
2632         { /* sentinel */ }
2633 };
2634 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2635 #endif
2636 
2637 static const struct acpi_device_id smsc911x_acpi_match[] = {
2638         { "ARMH9118", 0 },
2639         { }
2640 };
2641 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2642 
2643 static struct platform_driver smsc911x_driver = {
2644         .probe = smsc911x_drv_probe,
2645         .remove = smsc911x_drv_remove,
2646         .driver = {
2647                 .name   = SMSC_CHIPNAME,
2648                 .pm     = SMSC911X_PM_OPS,
2649                 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2650                 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2651         },
2652 };
2653 
2654 /* Entry point for loading the module */
2655 static int __init smsc911x_init_module(void)
2656 {
2657         SMSC_INITIALIZE();
2658         return platform_driver_register(&smsc911x_driver);
2659 }
2660 
2661 /* entry point for unloading the module */
2662 static void __exit smsc911x_cleanup_module(void)
2663 {
2664         platform_driver_unregister(&smsc911x_driver);
2665 }
2666 
2667 module_init(smsc911x_init_module);
2668 module_exit(smsc911x_cleanup_module);
2669 

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