Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

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/pm_runtime.h>
 63 
 64 #include "smsc911x.h"
 65 
 66 #define SMSC_CHIPNAME           "smsc911x"
 67 #define SMSC_MDIONAME           "smsc911x-mdio"
 68 #define SMSC_DRV_VERSION        "2008-10-21"
 69 
 70 MODULE_LICENSE("GPL");
 71 MODULE_VERSION(SMSC_DRV_VERSION);
 72 MODULE_ALIAS("platform:smsc911x");
 73 
 74 #if USE_DEBUG > 0
 75 static int debug = 16;
 76 #else
 77 static int debug = 3;
 78 #endif
 79 
 80 module_param(debug, int, 0);
 81 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 82 
 83 struct smsc911x_data;
 84 
 85 struct smsc911x_ops {
 86         u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
 87         void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
 88         void (*rx_readfifo)(struct smsc911x_data *pdata,
 89                                 unsigned int *buf, unsigned int wordcount);
 90         void (*tx_writefifo)(struct smsc911x_data *pdata,
 91                                 unsigned int *buf, unsigned int wordcount);
 92 };
 93 
 94 #define SMSC911X_NUM_SUPPLIES 2
 95 
 96 struct smsc911x_data {
 97         void __iomem *ioaddr;
 98 
 99         unsigned int idrev;
100 
101         /* used to decide which workarounds apply */
102         unsigned int generation;
103 
104         /* device configuration (copied from platform_data during probe) */
105         struct smsc911x_platform_config config;
106 
107         /* This needs to be acquired before calling any of below:
108          * smsc911x_mac_read(), smsc911x_mac_write()
109          */
110         spinlock_t mac_lock;
111 
112         /* spinlock to ensure register accesses are serialised */
113         spinlock_t dev_lock;
114 
115         struct phy_device *phy_dev;
116         struct mii_bus *mii_bus;
117         int phy_irq[PHY_MAX_ADDR];
118         unsigned int using_extphy;
119         int last_duplex;
120         int last_carrier;
121 
122         u32 msg_enable;
123         unsigned int gpio_setting;
124         unsigned int gpio_orig_setting;
125         struct net_device *dev;
126         struct napi_struct napi;
127 
128         unsigned int software_irq_signal;
129 
130 #ifdef USE_PHY_WORK_AROUND
131 #define MIN_PACKET_SIZE (64)
132         char loopback_tx_pkt[MIN_PACKET_SIZE];
133         char loopback_rx_pkt[MIN_PACKET_SIZE];
134         unsigned int resetcount;
135 #endif
136 
137         /* Members for Multicast filter workaround */
138         unsigned int multicast_update_pending;
139         unsigned int set_bits_mask;
140         unsigned int clear_bits_mask;
141         unsigned int hashhi;
142         unsigned int hashlo;
143 
144         /* register access functions */
145         const struct smsc911x_ops *ops;
146 
147         /* regulators */
148         struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
149 
150         /* clock */
151         struct clk *clk;
152 };
153 
154 /* Easy access to information */
155 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
156 
157 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
158 {
159         if (pdata->config.flags & SMSC911X_USE_32BIT)
160                 return readl(pdata->ioaddr + reg);
161 
162         if (pdata->config.flags & SMSC911X_USE_16BIT)
163                 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
164                         ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
165 
166         BUG();
167         return 0;
168 }
169 
170 static inline u32
171 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
172 {
173         if (pdata->config.flags & SMSC911X_USE_32BIT)
174                 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
175 
176         if (pdata->config.flags & SMSC911X_USE_16BIT)
177                 return (readw(pdata->ioaddr +
178                                 __smsc_shift(pdata, reg)) & 0xFFFF) |
179                         ((readw(pdata->ioaddr +
180                         __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
181 
182         BUG();
183         return 0;
184 }
185 
186 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
187 {
188         u32 data;
189         unsigned long flags;
190 
191         spin_lock_irqsave(&pdata->dev_lock, flags);
192         data = pdata->ops->reg_read(pdata, reg);
193         spin_unlock_irqrestore(&pdata->dev_lock, flags);
194 
195         return data;
196 }
197 
198 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
199                                         u32 val)
200 {
201         if (pdata->config.flags & SMSC911X_USE_32BIT) {
202                 writel(val, pdata->ioaddr + reg);
203                 return;
204         }
205 
206         if (pdata->config.flags & SMSC911X_USE_16BIT) {
207                 writew(val & 0xFFFF, pdata->ioaddr + reg);
208                 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
209                 return;
210         }
211 
212         BUG();
213 }
214 
215 static inline void
216 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
217 {
218         if (pdata->config.flags & SMSC911X_USE_32BIT) {
219                 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
220                 return;
221         }
222 
223         if (pdata->config.flags & SMSC911X_USE_16BIT) {
224                 writew(val & 0xFFFF,
225                         pdata->ioaddr + __smsc_shift(pdata, reg));
226                 writew((val >> 16) & 0xFFFF,
227                         pdata->ioaddr + __smsc_shift(pdata, reg + 2));
228                 return;
229         }
230 
231         BUG();
232 }
233 
234 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
235                                       u32 val)
236 {
237         unsigned long flags;
238 
239         spin_lock_irqsave(&pdata->dev_lock, flags);
240         pdata->ops->reg_write(pdata, reg, val);
241         spin_unlock_irqrestore(&pdata->dev_lock, flags);
242 }
243 
244 /* Writes a packet to the TX_DATA_FIFO */
245 static inline void
246 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
247                       unsigned int wordcount)
248 {
249         unsigned long flags;
250 
251         spin_lock_irqsave(&pdata->dev_lock, flags);
252 
253         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
254                 while (wordcount--)
255                         __smsc911x_reg_write(pdata, TX_DATA_FIFO,
256                                              swab32(*buf++));
257                 goto out;
258         }
259 
260         if (pdata->config.flags & SMSC911X_USE_32BIT) {
261                 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
262                 goto out;
263         }
264 
265         if (pdata->config.flags & SMSC911X_USE_16BIT) {
266                 while (wordcount--)
267                         __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
268                 goto out;
269         }
270 
271         BUG();
272 out:
273         spin_unlock_irqrestore(&pdata->dev_lock, flags);
274 }
275 
276 /* Writes a packet to the TX_DATA_FIFO - shifted version */
277 static inline void
278 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
279                       unsigned int wordcount)
280 {
281         unsigned long flags;
282 
283         spin_lock_irqsave(&pdata->dev_lock, flags);
284 
285         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
286                 while (wordcount--)
287                         __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
288                                              swab32(*buf++));
289                 goto out;
290         }
291 
292         if (pdata->config.flags & SMSC911X_USE_32BIT) {
293                 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
294                                                 TX_DATA_FIFO), buf, wordcount);
295                 goto out;
296         }
297 
298         if (pdata->config.flags & SMSC911X_USE_16BIT) {
299                 while (wordcount--)
300                         __smsc911x_reg_write_shift(pdata,
301                                                  TX_DATA_FIFO, *buf++);
302                 goto out;
303         }
304 
305         BUG();
306 out:
307         spin_unlock_irqrestore(&pdata->dev_lock, flags);
308 }
309 
310 /* Reads a packet out of the RX_DATA_FIFO */
311 static inline void
312 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
313                      unsigned int wordcount)
314 {
315         unsigned long flags;
316 
317         spin_lock_irqsave(&pdata->dev_lock, flags);
318 
319         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
320                 while (wordcount--)
321                         *buf++ = swab32(__smsc911x_reg_read(pdata,
322                                                             RX_DATA_FIFO));
323                 goto out;
324         }
325 
326         if (pdata->config.flags & SMSC911X_USE_32BIT) {
327                 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
328                 goto out;
329         }
330 
331         if (pdata->config.flags & SMSC911X_USE_16BIT) {
332                 while (wordcount--)
333                         *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
334                 goto out;
335         }
336 
337         BUG();
338 out:
339         spin_unlock_irqrestore(&pdata->dev_lock, flags);
340 }
341 
342 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
343 static inline void
344 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
345                      unsigned int wordcount)
346 {
347         unsigned long flags;
348 
349         spin_lock_irqsave(&pdata->dev_lock, flags);
350 
351         if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
352                 while (wordcount--)
353                         *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
354                                                             RX_DATA_FIFO));
355                 goto out;
356         }
357 
358         if (pdata->config.flags & SMSC911X_USE_32BIT) {
359                 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
360                                                 RX_DATA_FIFO), buf, wordcount);
361                 goto out;
362         }
363 
364         if (pdata->config.flags & SMSC911X_USE_16BIT) {
365                 while (wordcount--)
366                         *buf++ = __smsc911x_reg_read_shift(pdata,
367                                                                 RX_DATA_FIFO);
368                 goto out;
369         }
370 
371         BUG();
372 out:
373         spin_unlock_irqrestore(&pdata->dev_lock, flags);
374 }
375 
376 /*
377  * enable regulator and clock resources.
378  */
379 static int smsc911x_enable_resources(struct platform_device *pdev)
380 {
381         struct net_device *ndev = platform_get_drvdata(pdev);
382         struct smsc911x_data *pdata = netdev_priv(ndev);
383         int ret = 0;
384 
385         ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
386                         pdata->supplies);
387         if (ret)
388                 netdev_err(ndev, "failed to enable regulators %d\n",
389                                 ret);
390 
391         if (!IS_ERR(pdata->clk)) {
392                 ret = clk_prepare_enable(pdata->clk);
393                 if (ret < 0)
394                         netdev_err(ndev, "failed to enable clock %d\n", ret);
395         }
396 
397         return ret;
398 }
399 
400 /*
401  * disable resources, currently just regulators.
402  */
403 static int smsc911x_disable_resources(struct platform_device *pdev)
404 {
405         struct net_device *ndev = platform_get_drvdata(pdev);
406         struct smsc911x_data *pdata = netdev_priv(ndev);
407         int ret = 0;
408 
409         ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
410                         pdata->supplies);
411 
412         if (!IS_ERR(pdata->clk))
413                 clk_disable_unprepare(pdata->clk);
414 
415         return ret;
416 }
417 
418 /*
419  * Request resources, currently just regulators.
420  *
421  * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
422  * these are not always-on we need to request regulators to be turned on
423  * before we can try to access the device registers.
424  */
425 static int smsc911x_request_resources(struct platform_device *pdev)
426 {
427         struct net_device *ndev = platform_get_drvdata(pdev);
428         struct smsc911x_data *pdata = netdev_priv(ndev);
429         int ret = 0;
430 
431         /* Request regulators */
432         pdata->supplies[0].supply = "vdd33a";
433         pdata->supplies[1].supply = "vddvario";
434         ret = regulator_bulk_get(&pdev->dev,
435                         ARRAY_SIZE(pdata->supplies),
436                         pdata->supplies);
437         if (ret)
438                 netdev_err(ndev, "couldn't get regulators %d\n",
439                                 ret);
440 
441         /* Request clock */
442         pdata->clk = clk_get(&pdev->dev, NULL);
443         if (IS_ERR(pdata->clk))
444                 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
445                         PTR_ERR(pdata->clk));
446 
447         return ret;
448 }
449 
450 /*
451  * Free resources, currently just regulators.
452  *
453  */
454 static void smsc911x_free_resources(struct platform_device *pdev)
455 {
456         struct net_device *ndev = platform_get_drvdata(pdev);
457         struct smsc911x_data *pdata = netdev_priv(ndev);
458 
459         /* Free regulators */
460         regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
461                         pdata->supplies);
462 
463         /* Free clock */
464         if (!IS_ERR(pdata->clk)) {
465                 clk_put(pdata->clk);
466                 pdata->clk = NULL;
467         }
468 }
469 
470 /* waits for MAC not busy, with timeout.  Only called by smsc911x_mac_read
471  * and smsc911x_mac_write, so assumes mac_lock is held */
472 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
473 {
474         int i;
475         u32 val;
476 
477         SMSC_ASSERT_MAC_LOCK(pdata);
478 
479         for (i = 0; i < 40; i++) {
480                 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
481                 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
482                         return 0;
483         }
484         SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
485                   "MAC_CSR_CMD: 0x%08X", val);
486         return -EIO;
487 }
488 
489 /* Fetches a MAC register value. Assumes mac_lock is acquired */
490 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
491 {
492         unsigned int temp;
493 
494         SMSC_ASSERT_MAC_LOCK(pdata);
495 
496         temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
497         if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
498                 SMSC_WARN(pdata, hw, "MAC busy at entry");
499                 return 0xFFFFFFFF;
500         }
501 
502         /* Send the MAC cmd */
503         smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
504                 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
505 
506         /* Workaround for hardware read-after-write restriction */
507         temp = smsc911x_reg_read(pdata, BYTE_TEST);
508 
509         /* Wait for the read to complete */
510         if (likely(smsc911x_mac_complete(pdata) == 0))
511                 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
512 
513         SMSC_WARN(pdata, hw, "MAC busy after read");
514         return 0xFFFFFFFF;
515 }
516 
517 /* Set a mac register, mac_lock must be acquired before calling */
518 static void smsc911x_mac_write(struct smsc911x_data *pdata,
519                                unsigned int offset, u32 val)
520 {
521         unsigned int temp;
522 
523         SMSC_ASSERT_MAC_LOCK(pdata);
524 
525         temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
526         if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
527                 SMSC_WARN(pdata, hw,
528                           "smsc911x_mac_write failed, MAC busy at entry");
529                 return;
530         }
531 
532         /* Send data to write */
533         smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
534 
535         /* Write the actual data */
536         smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
537                 MAC_CSR_CMD_CSR_BUSY_));
538 
539         /* Workaround for hardware read-after-write restriction */
540         temp = smsc911x_reg_read(pdata, BYTE_TEST);
541 
542         /* Wait for the write to complete */
543         if (likely(smsc911x_mac_complete(pdata) == 0))
544                 return;
545 
546         SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
547 }
548 
549 /* Get a phy register */
550 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
551 {
552         struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
553         unsigned long flags;
554         unsigned int addr;
555         int i, reg;
556 
557         spin_lock_irqsave(&pdata->mac_lock, flags);
558 
559         /* Confirm MII not busy */
560         if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
561                 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
562                 reg = -EIO;
563                 goto out;
564         }
565 
566         /* Set the address, index & direction (read from PHY) */
567         addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
568         smsc911x_mac_write(pdata, MII_ACC, addr);
569 
570         /* Wait for read to complete w/ timeout */
571         for (i = 0; i < 100; i++)
572                 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
573                         reg = smsc911x_mac_read(pdata, MII_DATA);
574                         goto out;
575                 }
576 
577         SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
578         reg = -EIO;
579 
580 out:
581         spin_unlock_irqrestore(&pdata->mac_lock, flags);
582         return reg;
583 }
584 
585 /* Set a phy register */
586 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
587                            u16 val)
588 {
589         struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
590         unsigned long flags;
591         unsigned int addr;
592         int i, reg;
593 
594         spin_lock_irqsave(&pdata->mac_lock, flags);
595 
596         /* Confirm MII not busy */
597         if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
598                 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
599                 reg = -EIO;
600                 goto out;
601         }
602 
603         /* Put the data to write in the MAC */
604         smsc911x_mac_write(pdata, MII_DATA, val);
605 
606         /* Set the address, index & direction (write to PHY) */
607         addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
608                 MII_ACC_MII_WRITE_;
609         smsc911x_mac_write(pdata, MII_ACC, addr);
610 
611         /* Wait for write to complete w/ timeout */
612         for (i = 0; i < 100; i++)
613                 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
614                         reg = 0;
615                         goto out;
616                 }
617 
618         SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
619         reg = -EIO;
620 
621 out:
622         spin_unlock_irqrestore(&pdata->mac_lock, flags);
623         return reg;
624 }
625 
626 /* Switch to external phy. Assumes tx and rx are stopped. */
627 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
628 {
629         unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
630 
631         /* Disable phy clocks to the MAC */
632         hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
633         hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
634         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
635         udelay(10);     /* Enough time for clocks to stop */
636 
637         /* Switch to external phy */
638         hwcfg |= HW_CFG_EXT_PHY_EN_;
639         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
640 
641         /* Enable phy clocks to the MAC */
642         hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
643         hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
644         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
645         udelay(10);     /* Enough time for clocks to restart */
646 
647         hwcfg |= HW_CFG_SMI_SEL_;
648         smsc911x_reg_write(pdata, HW_CFG, hwcfg);
649 }
650 
651 /* Autodetects and enables external phy if present on supported chips.
652  * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
653  * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
654 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
655 {
656         unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
657 
658         if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
659                 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
660                 pdata->using_extphy = 0;
661         } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
662                 SMSC_TRACE(pdata, hw, "Forcing external PHY");
663                 smsc911x_phy_enable_external(pdata);
664                 pdata->using_extphy = 1;
665         } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
666                 SMSC_TRACE(pdata, hw,
667                            "HW_CFG EXT_PHY_DET set, using external PHY");
668                 smsc911x_phy_enable_external(pdata);
669                 pdata->using_extphy = 1;
670         } else {
671                 SMSC_TRACE(pdata, hw,
672                            "HW_CFG EXT_PHY_DET clear, using internal PHY");
673                 pdata->using_extphy = 0;
674         }
675 }
676 
677 /* Fetches a tx status out of the status fifo */
678 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
679 {
680         unsigned int result =
681             smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
682 
683         if (result != 0)
684                 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
685 
686         return result;
687 }
688 
689 /* Fetches the next rx status */
690 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
691 {
692         unsigned int result =
693             smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
694 
695         if (result != 0)
696                 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
697 
698         return result;
699 }
700 
701 #ifdef USE_PHY_WORK_AROUND
702 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
703 {
704         unsigned int tries;
705         u32 wrsz;
706         u32 rdsz;
707         ulong bufp;
708 
709         for (tries = 0; tries < 10; tries++) {
710                 unsigned int txcmd_a;
711                 unsigned int txcmd_b;
712                 unsigned int status;
713                 unsigned int pktlength;
714                 unsigned int i;
715 
716                 /* Zero-out rx packet memory */
717                 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
718 
719                 /* Write tx packet to 118 */
720                 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
721                 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
722                 txcmd_a |= MIN_PACKET_SIZE;
723 
724                 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
725 
726                 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
727                 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
728 
729                 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
730                 wrsz = MIN_PACKET_SIZE + 3;
731                 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
732                 wrsz >>= 2;
733 
734                 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
735 
736                 /* Wait till transmit is done */
737                 i = 60;
738                 do {
739                         udelay(5);
740                         status = smsc911x_tx_get_txstatus(pdata);
741                 } while ((i--) && (!status));
742 
743                 if (!status) {
744                         SMSC_WARN(pdata, hw,
745                                   "Failed to transmit during loopback test");
746                         continue;
747                 }
748                 if (status & TX_STS_ES_) {
749                         SMSC_WARN(pdata, hw,
750                                   "Transmit encountered errors during loopback test");
751                         continue;
752                 }
753 
754                 /* Wait till receive is done */
755                 i = 60;
756                 do {
757                         udelay(5);
758                         status = smsc911x_rx_get_rxstatus(pdata);
759                 } while ((i--) && (!status));
760 
761                 if (!status) {
762                         SMSC_WARN(pdata, hw,
763                                   "Failed to receive during loopback test");
764                         continue;
765                 }
766                 if (status & RX_STS_ES_) {
767                         SMSC_WARN(pdata, hw,
768                                   "Receive encountered errors during loopback test");
769                         continue;
770                 }
771 
772                 pktlength = ((status & 0x3FFF0000UL) >> 16);
773                 bufp = (ulong)pdata->loopback_rx_pkt;
774                 rdsz = pktlength + 3;
775                 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
776                 rdsz >>= 2;
777 
778                 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
779 
780                 if (pktlength != (MIN_PACKET_SIZE + 4)) {
781                         SMSC_WARN(pdata, hw, "Unexpected packet size "
782                                   "during loop back test, size=%d, will retry",
783                                   pktlength);
784                 } else {
785                         unsigned int j;
786                         int mismatch = 0;
787                         for (j = 0; j < MIN_PACKET_SIZE; j++) {
788                                 if (pdata->loopback_tx_pkt[j]
789                                     != pdata->loopback_rx_pkt[j]) {
790                                         mismatch = 1;
791                                         break;
792                                 }
793                         }
794                         if (!mismatch) {
795                                 SMSC_TRACE(pdata, hw, "Successfully verified "
796                                            "loopback packet");
797                                 return 0;
798                         } else {
799                                 SMSC_WARN(pdata, hw, "Data mismatch "
800                                           "during loop back test, will retry");
801                         }
802                 }
803         }
804 
805         return -EIO;
806 }
807 
808 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
809 {
810         struct phy_device *phy_dev = pdata->phy_dev;
811         unsigned int temp;
812         unsigned int i = 100000;
813 
814         BUG_ON(!phy_dev);
815         BUG_ON(!phy_dev->bus);
816 
817         SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset");
818         smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
819         do {
820                 msleep(1);
821                 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
822                         MII_BMCR);
823         } while ((i--) && (temp & BMCR_RESET));
824 
825         if (temp & BMCR_RESET) {
826                 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
827                 return -EIO;
828         }
829         /* Extra delay required because the phy may not be completed with
830         * its reset when BMCR_RESET is cleared. Specs say 256 uS is
831         * enough delay but using 1ms here to be safe */
832         msleep(1);
833 
834         return 0;
835 }
836 
837 static int smsc911x_phy_loopbacktest(struct net_device *dev)
838 {
839         struct smsc911x_data *pdata = netdev_priv(dev);
840         struct phy_device *phy_dev = pdata->phy_dev;
841         int result = -EIO;
842         unsigned int i, val;
843         unsigned long flags;
844 
845         /* Initialise tx packet using broadcast destination address */
846         memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
847 
848         /* Use incrementing source address */
849         for (i = 6; i < 12; i++)
850                 pdata->loopback_tx_pkt[i] = (char)i;
851 
852         /* Set length type field */
853         pdata->loopback_tx_pkt[12] = 0x00;
854         pdata->loopback_tx_pkt[13] = 0x00;
855 
856         for (i = 14; i < MIN_PACKET_SIZE; i++)
857                 pdata->loopback_tx_pkt[i] = (char)i;
858 
859         val = smsc911x_reg_read(pdata, HW_CFG);
860         val &= HW_CFG_TX_FIF_SZ_;
861         val |= HW_CFG_SF_;
862         smsc911x_reg_write(pdata, HW_CFG, val);
863 
864         smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
865         smsc911x_reg_write(pdata, RX_CFG,
866                 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
867 
868         for (i = 0; i < 10; i++) {
869                 /* Set PHY to 10/FD, no ANEG, and loopback mode */
870                 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
871                         BMCR_LOOPBACK | BMCR_FULLDPLX);
872 
873                 /* Enable MAC tx/rx, FD */
874                 spin_lock_irqsave(&pdata->mac_lock, flags);
875                 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
876                                    | MAC_CR_TXEN_ | MAC_CR_RXEN_);
877                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
878 
879                 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
880                         result = 0;
881                         break;
882                 }
883                 pdata->resetcount++;
884 
885                 /* Disable MAC rx */
886                 spin_lock_irqsave(&pdata->mac_lock, flags);
887                 smsc911x_mac_write(pdata, MAC_CR, 0);
888                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
889 
890                 smsc911x_phy_reset(pdata);
891         }
892 
893         /* Disable MAC */
894         spin_lock_irqsave(&pdata->mac_lock, flags);
895         smsc911x_mac_write(pdata, MAC_CR, 0);
896         spin_unlock_irqrestore(&pdata->mac_lock, flags);
897 
898         /* Cancel PHY loopback mode */
899         smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
900 
901         smsc911x_reg_write(pdata, TX_CFG, 0);
902         smsc911x_reg_write(pdata, RX_CFG, 0);
903 
904         return result;
905 }
906 #endif                          /* USE_PHY_WORK_AROUND */
907 
908 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
909 {
910         struct phy_device *phy_dev = pdata->phy_dev;
911         u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
912         u32 flow;
913         unsigned long flags;
914 
915         if (phy_dev->duplex == DUPLEX_FULL) {
916                 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
917                 u16 rmtadv = phy_read(phy_dev, MII_LPA);
918                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
919 
920                 if (cap & FLOW_CTRL_RX)
921                         flow = 0xFFFF0002;
922                 else
923                         flow = 0;
924 
925                 if (cap & FLOW_CTRL_TX)
926                         afc |= 0xF;
927                 else
928                         afc &= ~0xF;
929 
930                 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
931                            (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
932                            (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
933         } else {
934                 SMSC_TRACE(pdata, hw, "half duplex");
935                 flow = 0;
936                 afc |= 0xF;
937         }
938 
939         spin_lock_irqsave(&pdata->mac_lock, flags);
940         smsc911x_mac_write(pdata, FLOW, flow);
941         spin_unlock_irqrestore(&pdata->mac_lock, flags);
942 
943         smsc911x_reg_write(pdata, AFC_CFG, afc);
944 }
945 
946 /* Update link mode if anything has changed.  Called periodically when the
947  * PHY is in polling mode, even if nothing has changed. */
948 static void smsc911x_phy_adjust_link(struct net_device *dev)
949 {
950         struct smsc911x_data *pdata = netdev_priv(dev);
951         struct phy_device *phy_dev = pdata->phy_dev;
952         unsigned long flags;
953         int carrier;
954 
955         if (phy_dev->duplex != pdata->last_duplex) {
956                 unsigned int mac_cr;
957                 SMSC_TRACE(pdata, hw, "duplex state has changed");
958 
959                 spin_lock_irqsave(&pdata->mac_lock, flags);
960                 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
961                 if (phy_dev->duplex) {
962                         SMSC_TRACE(pdata, hw,
963                                    "configuring for full duplex mode");
964                         mac_cr |= MAC_CR_FDPX_;
965                 } else {
966                         SMSC_TRACE(pdata, hw,
967                                    "configuring for half duplex mode");
968                         mac_cr &= ~MAC_CR_FDPX_;
969                 }
970                 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
971                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
972 
973                 smsc911x_phy_update_flowcontrol(pdata);
974                 pdata->last_duplex = phy_dev->duplex;
975         }
976 
977         carrier = netif_carrier_ok(dev);
978         if (carrier != pdata->last_carrier) {
979                 SMSC_TRACE(pdata, hw, "carrier state has changed");
980                 if (carrier) {
981                         SMSC_TRACE(pdata, hw, "configuring for carrier OK");
982                         if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
983                             (!pdata->using_extphy)) {
984                                 /* Restore original GPIO configuration */
985                                 pdata->gpio_setting = pdata->gpio_orig_setting;
986                                 smsc911x_reg_write(pdata, GPIO_CFG,
987                                         pdata->gpio_setting);
988                         }
989                 } else {
990                         SMSC_TRACE(pdata, hw, "configuring for no carrier");
991                         /* Check global setting that LED1
992                          * usage is 10/100 indicator */
993                         pdata->gpio_setting = smsc911x_reg_read(pdata,
994                                 GPIO_CFG);
995                         if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
996                             (!pdata->using_extphy)) {
997                                 /* Force 10/100 LED off, after saving
998                                  * original GPIO configuration */
999                                 pdata->gpio_orig_setting = pdata->gpio_setting;
1000 
1001                                 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1002                                 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1003                                                         | GPIO_CFG_GPIODIR0_
1004                                                         | GPIO_CFG_GPIOD0_);
1005                                 smsc911x_reg_write(pdata, GPIO_CFG,
1006                                         pdata->gpio_setting);
1007                         }
1008                 }
1009                 pdata->last_carrier = carrier;
1010         }
1011 }
1012 
1013 static int smsc911x_mii_probe(struct net_device *dev)
1014 {
1015         struct smsc911x_data *pdata = netdev_priv(dev);
1016         struct phy_device *phydev = NULL;
1017         int ret;
1018 
1019         /* find the first phy */
1020         phydev = phy_find_first(pdata->mii_bus);
1021         if (!phydev) {
1022                 netdev_err(dev, "no PHY found\n");
1023                 return -ENODEV;
1024         }
1025 
1026         SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1027                    phydev->addr, phydev->phy_id);
1028 
1029         ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1030                                  pdata->config.phy_interface);
1031 
1032         if (ret) {
1033                 netdev_err(dev, "Could not attach to PHY\n");
1034                 return ret;
1035         }
1036 
1037         netdev_info(dev,
1038                     "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
1039                     phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
1040 
1041         /* mask with MAC supported features */
1042         phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1043                               SUPPORTED_Asym_Pause);
1044         phydev->advertising = phydev->supported;
1045 
1046         pdata->phy_dev = phydev;
1047         pdata->last_duplex = -1;
1048         pdata->last_carrier = -1;
1049 
1050 #ifdef USE_PHY_WORK_AROUND
1051         if (smsc911x_phy_loopbacktest(dev) < 0) {
1052                 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1053                 return -ENODEV;
1054         }
1055         SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1056 #endif                          /* USE_PHY_WORK_AROUND */
1057 
1058         SMSC_TRACE(pdata, hw, "phy initialised successfully");
1059         return 0;
1060 }
1061 
1062 static int smsc911x_mii_init(struct platform_device *pdev,
1063                              struct net_device *dev)
1064 {
1065         struct smsc911x_data *pdata = netdev_priv(dev);
1066         int err = -ENXIO, i;
1067 
1068         pdata->mii_bus = mdiobus_alloc();
1069         if (!pdata->mii_bus) {
1070                 err = -ENOMEM;
1071                 goto err_out_1;
1072         }
1073 
1074         pdata->mii_bus->name = SMSC_MDIONAME;
1075         snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1076                 pdev->name, pdev->id);
1077         pdata->mii_bus->priv = pdata;
1078         pdata->mii_bus->read = smsc911x_mii_read;
1079         pdata->mii_bus->write = smsc911x_mii_write;
1080         pdata->mii_bus->irq = pdata->phy_irq;
1081         for (i = 0; i < PHY_MAX_ADDR; ++i)
1082                 pdata->mii_bus->irq[i] = PHY_POLL;
1083 
1084         pdata->mii_bus->parent = &pdev->dev;
1085 
1086         switch (pdata->idrev & 0xFFFF0000) {
1087         case 0x01170000:
1088         case 0x01150000:
1089         case 0x117A0000:
1090         case 0x115A0000:
1091                 /* External PHY supported, try to autodetect */
1092                 smsc911x_phy_initialise_external(pdata);
1093                 break;
1094         default:
1095                 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1096                            "using internal PHY");
1097                 pdata->using_extphy = 0;
1098                 break;
1099         }
1100 
1101         if (!pdata->using_extphy) {
1102                 /* Mask all PHYs except ID 1 (internal) */
1103                 pdata->mii_bus->phy_mask = ~(1 << 1);
1104         }
1105 
1106         if (mdiobus_register(pdata->mii_bus)) {
1107                 SMSC_WARN(pdata, probe, "Error registering mii bus");
1108                 goto err_out_free_bus_2;
1109         }
1110 
1111         if (smsc911x_mii_probe(dev) < 0) {
1112                 SMSC_WARN(pdata, probe, "Error registering mii bus");
1113                 goto err_out_unregister_bus_3;
1114         }
1115 
1116         return 0;
1117 
1118 err_out_unregister_bus_3:
1119         mdiobus_unregister(pdata->mii_bus);
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         int rc = 0;
1350 
1351         if (!pdata->phy_dev)
1352                 return rc;
1353 
1354         /* If the internal PHY is in General Power-Down mode, all, except the
1355          * management interface, is powered-down and stays in that condition as
1356          * long as Phy register bit 0.11 is HIGH.
1357          *
1358          * In that case, clear the bit 0.11, so the PHY powers up and we can
1359          * access to the phy registers.
1360          */
1361         rc = phy_read(pdata->phy_dev, MII_BMCR);
1362         if (rc < 0) {
1363                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1364                 return rc;
1365         }
1366 
1367         /* If the PHY general power-down bit is not set is not necessary to
1368          * disable the general power down-mode.
1369          */
1370         if (rc & BMCR_PDOWN) {
1371                 rc = phy_write(pdata->phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1372                 if (rc < 0) {
1373                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1374                         return rc;
1375                 }
1376 
1377                 usleep_range(1000, 1500);
1378         }
1379 
1380         return 0;
1381 }
1382 
1383 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1384 {
1385         int rc = 0;
1386 
1387         if (!pdata->phy_dev)
1388                 return rc;
1389 
1390         rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1391 
1392         if (rc < 0) {
1393                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1394                 return rc;
1395         }
1396 
1397         /* Only disable if energy detect mode is already enabled */
1398         if (rc & MII_LAN83C185_EDPWRDOWN) {
1399                 /* Disable energy detect mode for this SMSC Transceivers */
1400                 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1401                                rc & (~MII_LAN83C185_EDPWRDOWN));
1402 
1403                 if (rc < 0) {
1404                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1405                         return rc;
1406                 }
1407                 /* Allow PHY to wakeup */
1408                 mdelay(2);
1409         }
1410 
1411         return 0;
1412 }
1413 
1414 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1415 {
1416         int rc = 0;
1417 
1418         if (!pdata->phy_dev)
1419                 return rc;
1420 
1421         rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1422 
1423         if (rc < 0) {
1424                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1425                 return rc;
1426         }
1427 
1428         /* Only enable if energy detect mode is already disabled */
1429         if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1430                 /* Enable energy detect mode for this SMSC Transceivers */
1431                 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1432                                rc | MII_LAN83C185_EDPWRDOWN);
1433 
1434                 if (rc < 0) {
1435                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1436                         return rc;
1437                 }
1438         }
1439         return 0;
1440 }
1441 
1442 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1443 {
1444         unsigned int timeout;
1445         unsigned int temp;
1446         int ret;
1447 
1448         /*
1449          * Make sure to power-up the PHY chip before doing a reset, otherwise
1450          * the reset fails.
1451          */
1452         ret = smsc911x_phy_general_power_up(pdata);
1453         if (ret) {
1454                 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1455                 return ret;
1456         }
1457 
1458         /*
1459          * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1460          * are initialized in a Energy Detect Power-Down mode that prevents
1461          * the MAC chip to be software reseted. So we have to wakeup the PHY
1462          * before.
1463          */
1464         if (pdata->generation == 4) {
1465                 ret = smsc911x_phy_disable_energy_detect(pdata);
1466 
1467                 if (ret) {
1468                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1469                         return ret;
1470                 }
1471         }
1472 
1473         /* Reset the LAN911x */
1474         smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1475         timeout = 10;
1476         do {
1477                 udelay(10);
1478                 temp = smsc911x_reg_read(pdata, HW_CFG);
1479         } while ((--timeout) && (temp & HW_CFG_SRST_));
1480 
1481         if (unlikely(temp & HW_CFG_SRST_)) {
1482                 SMSC_WARN(pdata, drv, "Failed to complete reset");
1483                 return -EIO;
1484         }
1485 
1486         if (pdata->generation == 4) {
1487                 ret = smsc911x_phy_enable_energy_detect(pdata);
1488 
1489                 if (ret) {
1490                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1491                         return ret;
1492                 }
1493         }
1494 
1495         return 0;
1496 }
1497 
1498 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1499 static void
1500 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1501 {
1502         u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1503         u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1504             (dev_addr[1] << 8) | dev_addr[0];
1505 
1506         SMSC_ASSERT_MAC_LOCK(pdata);
1507 
1508         smsc911x_mac_write(pdata, ADDRH, mac_high16);
1509         smsc911x_mac_write(pdata, ADDRL, mac_low32);
1510 }
1511 
1512 static void smsc911x_disable_irq_chip(struct net_device *dev)
1513 {
1514         struct smsc911x_data *pdata = netdev_priv(dev);
1515 
1516         smsc911x_reg_write(pdata, INT_EN, 0);
1517         smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1518 }
1519 
1520 static int smsc911x_open(struct net_device *dev)
1521 {
1522         struct smsc911x_data *pdata = netdev_priv(dev);
1523         unsigned int timeout;
1524         unsigned int temp;
1525         unsigned int intcfg;
1526 
1527         /* if the phy is not yet registered, retry later*/
1528         if (!pdata->phy_dev) {
1529                 SMSC_WARN(pdata, hw, "phy_dev is NULL");
1530                 return -EAGAIN;
1531         }
1532 
1533         /* Reset the LAN911x */
1534         if (smsc911x_soft_reset(pdata)) {
1535                 SMSC_WARN(pdata, hw, "soft reset failed");
1536                 return -EIO;
1537         }
1538 
1539         smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1540         smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1541 
1542         /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1543         spin_lock_irq(&pdata->mac_lock);
1544         smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1545         spin_unlock_irq(&pdata->mac_lock);
1546 
1547         /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1548         timeout = 50;
1549         while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1550                --timeout) {
1551                 udelay(10);
1552         }
1553 
1554         if (unlikely(timeout == 0))
1555                 SMSC_WARN(pdata, ifup,
1556                           "Timed out waiting for EEPROM busy bit to clear");
1557 
1558         smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1559 
1560         /* The soft reset above cleared the device's MAC address,
1561          * restore it from local copy (set in probe) */
1562         spin_lock_irq(&pdata->mac_lock);
1563         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1564         spin_unlock_irq(&pdata->mac_lock);
1565 
1566         /* Initialise irqs, but leave all sources disabled */
1567         smsc911x_disable_irq_chip(dev);
1568 
1569         /* Set interrupt deassertion to 100uS */
1570         intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1571 
1572         if (pdata->config.irq_polarity) {
1573                 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1574                 intcfg |= INT_CFG_IRQ_POL_;
1575         } else {
1576                 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1577         }
1578 
1579         if (pdata->config.irq_type) {
1580                 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1581                 intcfg |= INT_CFG_IRQ_TYPE_;
1582         } else {
1583                 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1584         }
1585 
1586         smsc911x_reg_write(pdata, INT_CFG, intcfg);
1587 
1588         SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1589         pdata->software_irq_signal = 0;
1590         smp_wmb();
1591 
1592         temp = smsc911x_reg_read(pdata, INT_EN);
1593         temp |= INT_EN_SW_INT_EN_;
1594         smsc911x_reg_write(pdata, INT_EN, temp);
1595 
1596         timeout = 1000;
1597         while (timeout--) {
1598                 if (pdata->software_irq_signal)
1599                         break;
1600                 msleep(1);
1601         }
1602 
1603         if (!pdata->software_irq_signal) {
1604                 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1605                             dev->irq);
1606                 return -ENODEV;
1607         }
1608         SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1609                    dev->irq);
1610 
1611         netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1612                     (unsigned long)pdata->ioaddr, dev->irq);
1613 
1614         /* Reset the last known duplex and carrier */
1615         pdata->last_duplex = -1;
1616         pdata->last_carrier = -1;
1617 
1618         /* Bring the PHY up */
1619         phy_start(pdata->phy_dev);
1620 
1621         temp = smsc911x_reg_read(pdata, HW_CFG);
1622         /* Preserve TX FIFO size and external PHY configuration */
1623         temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1624         temp |= HW_CFG_SF_;
1625         smsc911x_reg_write(pdata, HW_CFG, temp);
1626 
1627         temp = smsc911x_reg_read(pdata, FIFO_INT);
1628         temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1629         temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1630         smsc911x_reg_write(pdata, FIFO_INT, temp);
1631 
1632         /* set RX Data offset to 2 bytes for alignment */
1633         smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1634 
1635         /* enable NAPI polling before enabling RX interrupts */
1636         napi_enable(&pdata->napi);
1637 
1638         temp = smsc911x_reg_read(pdata, INT_EN);
1639         temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1640         smsc911x_reg_write(pdata, INT_EN, temp);
1641 
1642         spin_lock_irq(&pdata->mac_lock);
1643         temp = smsc911x_mac_read(pdata, MAC_CR);
1644         temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1645         smsc911x_mac_write(pdata, MAC_CR, temp);
1646         spin_unlock_irq(&pdata->mac_lock);
1647 
1648         smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1649 
1650         netif_start_queue(dev);
1651         return 0;
1652 }
1653 
1654 /* Entry point for stopping the interface */
1655 static int smsc911x_stop(struct net_device *dev)
1656 {
1657         struct smsc911x_data *pdata = netdev_priv(dev);
1658         unsigned int temp;
1659 
1660         /* Disable all device interrupts */
1661         temp = smsc911x_reg_read(pdata, INT_CFG);
1662         temp &= ~INT_CFG_IRQ_EN_;
1663         smsc911x_reg_write(pdata, INT_CFG, temp);
1664 
1665         /* Stop Tx and Rx polling */
1666         netif_stop_queue(dev);
1667         napi_disable(&pdata->napi);
1668 
1669         /* At this point all Rx and Tx activity is stopped */
1670         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1671         smsc911x_tx_update_txcounters(dev);
1672 
1673         /* Bring the PHY down */
1674         if (pdata->phy_dev)
1675                 phy_stop(pdata->phy_dev);
1676 
1677         SMSC_TRACE(pdata, ifdown, "Interface stopped");
1678         return 0;
1679 }
1680 
1681 /* Entry point for transmitting a packet */
1682 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1683 {
1684         struct smsc911x_data *pdata = netdev_priv(dev);
1685         unsigned int freespace;
1686         unsigned int tx_cmd_a;
1687         unsigned int tx_cmd_b;
1688         unsigned int temp;
1689         u32 wrsz;
1690         ulong bufp;
1691 
1692         freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1693 
1694         if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1695                 SMSC_WARN(pdata, tx_err,
1696                           "Tx data fifo low, space available: %d", freespace);
1697 
1698         /* Word alignment adjustment */
1699         tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1700         tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1701         tx_cmd_a |= (unsigned int)skb->len;
1702 
1703         tx_cmd_b = ((unsigned int)skb->len) << 16;
1704         tx_cmd_b |= (unsigned int)skb->len;
1705 
1706         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1707         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1708 
1709         bufp = (ulong)skb->data & (~0x3);
1710         wrsz = (u32)skb->len + 3;
1711         wrsz += (u32)((ulong)skb->data & 0x3);
1712         wrsz >>= 2;
1713 
1714         pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1715         freespace -= (skb->len + 32);
1716         skb_tx_timestamp(skb);
1717         dev_consume_skb_any(skb);
1718 
1719         if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1720                 smsc911x_tx_update_txcounters(dev);
1721 
1722         if (freespace < TX_FIFO_LOW_THRESHOLD) {
1723                 netif_stop_queue(dev);
1724                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1725                 temp &= 0x00FFFFFF;
1726                 temp |= 0x32000000;
1727                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1728         }
1729 
1730         return NETDEV_TX_OK;
1731 }
1732 
1733 /* Entry point for getting status counters */
1734 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1735 {
1736         struct smsc911x_data *pdata = netdev_priv(dev);
1737         smsc911x_tx_update_txcounters(dev);
1738         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1739         return &dev->stats;
1740 }
1741 
1742 /* Entry point for setting addressing modes */
1743 static void smsc911x_set_multicast_list(struct net_device *dev)
1744 {
1745         struct smsc911x_data *pdata = netdev_priv(dev);
1746         unsigned long flags;
1747 
1748         if (dev->flags & IFF_PROMISC) {
1749                 /* Enabling promiscuous mode */
1750                 pdata->set_bits_mask = MAC_CR_PRMS_;
1751                 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1752                 pdata->hashhi = 0;
1753                 pdata->hashlo = 0;
1754         } else if (dev->flags & IFF_ALLMULTI) {
1755                 /* Enabling all multicast mode */
1756                 pdata->set_bits_mask = MAC_CR_MCPAS_;
1757                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1758                 pdata->hashhi = 0;
1759                 pdata->hashlo = 0;
1760         } else if (!netdev_mc_empty(dev)) {
1761                 /* Enabling specific multicast addresses */
1762                 unsigned int hash_high = 0;
1763                 unsigned int hash_low = 0;
1764                 struct netdev_hw_addr *ha;
1765 
1766                 pdata->set_bits_mask = MAC_CR_HPFILT_;
1767                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1768 
1769                 netdev_for_each_mc_addr(ha, dev) {
1770                         unsigned int bitnum = smsc911x_hash(ha->addr);
1771                         unsigned int mask = 0x01 << (bitnum & 0x1F);
1772 
1773                         if (bitnum & 0x20)
1774                                 hash_high |= mask;
1775                         else
1776                                 hash_low |= mask;
1777                 }
1778 
1779                 pdata->hashhi = hash_high;
1780                 pdata->hashlo = hash_low;
1781         } else {
1782                 /* Enabling local MAC address only */
1783                 pdata->set_bits_mask = 0;
1784                 pdata->clear_bits_mask =
1785                     (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1786                 pdata->hashhi = 0;
1787                 pdata->hashlo = 0;
1788         }
1789 
1790         spin_lock_irqsave(&pdata->mac_lock, flags);
1791 
1792         if (pdata->generation <= 1) {
1793                 /* Older hardware revision - cannot change these flags while
1794                  * receiving data */
1795                 if (!pdata->multicast_update_pending) {
1796                         unsigned int temp;
1797                         SMSC_TRACE(pdata, hw, "scheduling mcast update");
1798                         pdata->multicast_update_pending = 1;
1799 
1800                         /* Request the hardware to stop, then perform the
1801                          * update when we get an RX_STOP interrupt */
1802                         temp = smsc911x_mac_read(pdata, MAC_CR);
1803                         temp &= ~(MAC_CR_RXEN_);
1804                         smsc911x_mac_write(pdata, MAC_CR, temp);
1805                 } else {
1806                         /* There is another update pending, this should now
1807                          * use the newer values */
1808                 }
1809         } else {
1810                 /* Newer hardware revision - can write immediately */
1811                 smsc911x_rx_multicast_update(pdata);
1812         }
1813 
1814         spin_unlock_irqrestore(&pdata->mac_lock, flags);
1815 }
1816 
1817 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1818 {
1819         struct net_device *dev = dev_id;
1820         struct smsc911x_data *pdata = netdev_priv(dev);
1821         u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1822         u32 inten = smsc911x_reg_read(pdata, INT_EN);
1823         int serviced = IRQ_NONE;
1824         u32 temp;
1825 
1826         if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1827                 temp = smsc911x_reg_read(pdata, INT_EN);
1828                 temp &= (~INT_EN_SW_INT_EN_);
1829                 smsc911x_reg_write(pdata, INT_EN, temp);
1830                 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1831                 pdata->software_irq_signal = 1;
1832                 smp_wmb();
1833                 serviced = IRQ_HANDLED;
1834         }
1835 
1836         if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1837                 /* Called when there is a multicast update scheduled and
1838                  * it is now safe to complete the update */
1839                 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1840                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1841                 if (pdata->multicast_update_pending)
1842                         smsc911x_rx_multicast_update_workaround(pdata);
1843                 serviced = IRQ_HANDLED;
1844         }
1845 
1846         if (intsts & inten & INT_STS_TDFA_) {
1847                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1848                 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1849                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1850                 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1851                 netif_wake_queue(dev);
1852                 serviced = IRQ_HANDLED;
1853         }
1854 
1855         if (unlikely(intsts & inten & INT_STS_RXE_)) {
1856                 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1857                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1858                 serviced = IRQ_HANDLED;
1859         }
1860 
1861         if (likely(intsts & inten & INT_STS_RSFL_)) {
1862                 if (likely(napi_schedule_prep(&pdata->napi))) {
1863                         /* Disable Rx interrupts */
1864                         temp = smsc911x_reg_read(pdata, INT_EN);
1865                         temp &= (~INT_EN_RSFL_EN_);
1866                         smsc911x_reg_write(pdata, INT_EN, temp);
1867                         /* Schedule a NAPI poll */
1868                         __napi_schedule(&pdata->napi);
1869                 } else {
1870                         SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1871                 }
1872                 serviced = IRQ_HANDLED;
1873         }
1874 
1875         return serviced;
1876 }
1877 
1878 #ifdef CONFIG_NET_POLL_CONTROLLER
1879 static void smsc911x_poll_controller(struct net_device *dev)
1880 {
1881         disable_irq(dev->irq);
1882         smsc911x_irqhandler(0, dev);
1883         enable_irq(dev->irq);
1884 }
1885 #endif                          /* CONFIG_NET_POLL_CONTROLLER */
1886 
1887 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1888 {
1889         struct smsc911x_data *pdata = netdev_priv(dev);
1890         struct sockaddr *addr = p;
1891 
1892         /* On older hardware revisions we cannot change the mac address
1893          * registers while receiving data.  Newer devices can safely change
1894          * this at any time. */
1895         if (pdata->generation <= 1 && netif_running(dev))
1896                 return -EBUSY;
1897 
1898         if (!is_valid_ether_addr(addr->sa_data))
1899                 return -EADDRNOTAVAIL;
1900 
1901         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1902 
1903         spin_lock_irq(&pdata->mac_lock);
1904         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1905         spin_unlock_irq(&pdata->mac_lock);
1906 
1907         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1908 
1909         return 0;
1910 }
1911 
1912 /* Standard ioctls for mii-tool */
1913 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1914 {
1915         struct smsc911x_data *pdata = netdev_priv(dev);
1916 
1917         if (!netif_running(dev) || !pdata->phy_dev)
1918                 return -EINVAL;
1919 
1920         return phy_mii_ioctl(pdata->phy_dev, ifr, cmd);
1921 }
1922 
1923 static int
1924 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1925 {
1926         struct smsc911x_data *pdata = netdev_priv(dev);
1927 
1928         cmd->maxtxpkt = 1;
1929         cmd->maxrxpkt = 1;
1930         return phy_ethtool_gset(pdata->phy_dev, cmd);
1931 }
1932 
1933 static int
1934 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1935 {
1936         struct smsc911x_data *pdata = netdev_priv(dev);
1937 
1938         return phy_ethtool_sset(pdata->phy_dev, cmd);
1939 }
1940 
1941 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1942                                         struct ethtool_drvinfo *info)
1943 {
1944         strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1945         strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1946         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1947                 sizeof(info->bus_info));
1948 }
1949 
1950 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1951 {
1952         struct smsc911x_data *pdata = netdev_priv(dev);
1953 
1954         return phy_start_aneg(pdata->phy_dev);
1955 }
1956 
1957 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1958 {
1959         struct smsc911x_data *pdata = netdev_priv(dev);
1960         return pdata->msg_enable;
1961 }
1962 
1963 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1964 {
1965         struct smsc911x_data *pdata = netdev_priv(dev);
1966         pdata->msg_enable = level;
1967 }
1968 
1969 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1970 {
1971         return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1972             sizeof(u32);
1973 }
1974 
1975 static void
1976 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1977                          void *buf)
1978 {
1979         struct smsc911x_data *pdata = netdev_priv(dev);
1980         struct phy_device *phy_dev = pdata->phy_dev;
1981         unsigned long flags;
1982         unsigned int i;
1983         unsigned int j = 0;
1984         u32 *data = buf;
1985 
1986         regs->version = pdata->idrev;
1987         for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1988                 data[j++] = smsc911x_reg_read(pdata, i);
1989 
1990         for (i = MAC_CR; i <= WUCSR; i++) {
1991                 spin_lock_irqsave(&pdata->mac_lock, flags);
1992                 data[j++] = smsc911x_mac_read(pdata, i);
1993                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1994         }
1995 
1996         for (i = 0; i <= 31; i++)
1997                 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1998 }
1999 
2000 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2001 {
2002         unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2003         temp &= ~GPIO_CFG_EEPR_EN_;
2004         smsc911x_reg_write(pdata, GPIO_CFG, temp);
2005         msleep(1);
2006 }
2007 
2008 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2009 {
2010         int timeout = 100;
2011         u32 e2cmd;
2012 
2013         SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2014         if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2015                 SMSC_WARN(pdata, drv, "Busy at start");
2016                 return -EBUSY;
2017         }
2018 
2019         e2cmd = op | E2P_CMD_EPC_BUSY_;
2020         smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2021 
2022         do {
2023                 msleep(1);
2024                 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2025         } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2026 
2027         if (!timeout) {
2028                 SMSC_TRACE(pdata, drv, "TIMED OUT");
2029                 return -EAGAIN;
2030         }
2031 
2032         if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2033                 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2034                 return -EINVAL;
2035         }
2036 
2037         return 0;
2038 }
2039 
2040 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2041                                          u8 address, u8 *data)
2042 {
2043         u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2044         int ret;
2045 
2046         SMSC_TRACE(pdata, drv, "address 0x%x", address);
2047         ret = smsc911x_eeprom_send_cmd(pdata, op);
2048 
2049         if (!ret)
2050                 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2051 
2052         return ret;
2053 }
2054 
2055 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2056                                           u8 address, u8 data)
2057 {
2058         u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2059         u32 temp;
2060         int ret;
2061 
2062         SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2063         ret = smsc911x_eeprom_send_cmd(pdata, op);
2064 
2065         if (!ret) {
2066                 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2067                 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2068 
2069                 /* Workaround for hardware read-after-write restriction */
2070                 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2071 
2072                 ret = smsc911x_eeprom_send_cmd(pdata, op);
2073         }
2074 
2075         return ret;
2076 }
2077 
2078 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2079 {
2080         return SMSC911X_EEPROM_SIZE;
2081 }
2082 
2083 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2084                                        struct ethtool_eeprom *eeprom, u8 *data)
2085 {
2086         struct smsc911x_data *pdata = netdev_priv(dev);
2087         u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2088         int len;
2089         int i;
2090 
2091         smsc911x_eeprom_enable_access(pdata);
2092 
2093         len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2094         for (i = 0; i < len; i++) {
2095                 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2096                 if (ret < 0) {
2097                         eeprom->len = 0;
2098                         return ret;
2099                 }
2100         }
2101 
2102         memcpy(data, &eeprom_data[eeprom->offset], len);
2103         eeprom->len = len;
2104         return 0;
2105 }
2106 
2107 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2108                                        struct ethtool_eeprom *eeprom, u8 *data)
2109 {
2110         int ret;
2111         struct smsc911x_data *pdata = netdev_priv(dev);
2112 
2113         smsc911x_eeprom_enable_access(pdata);
2114         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2115         ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2116         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2117 
2118         /* Single byte write, according to man page */
2119         eeprom->len = 1;
2120 
2121         return ret;
2122 }
2123 
2124 static const struct ethtool_ops smsc911x_ethtool_ops = {
2125         .get_settings = smsc911x_ethtool_getsettings,
2126         .set_settings = smsc911x_ethtool_setsettings,
2127         .get_link = ethtool_op_get_link,
2128         .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2129         .nway_reset = smsc911x_ethtool_nwayreset,
2130         .get_msglevel = smsc911x_ethtool_getmsglevel,
2131         .set_msglevel = smsc911x_ethtool_setmsglevel,
2132         .get_regs_len = smsc911x_ethtool_getregslen,
2133         .get_regs = smsc911x_ethtool_getregs,
2134         .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2135         .get_eeprom = smsc911x_ethtool_get_eeprom,
2136         .set_eeprom = smsc911x_ethtool_set_eeprom,
2137         .get_ts_info = ethtool_op_get_ts_info,
2138 };
2139 
2140 static const struct net_device_ops smsc911x_netdev_ops = {
2141         .ndo_open               = smsc911x_open,
2142         .ndo_stop               = smsc911x_stop,
2143         .ndo_start_xmit         = smsc911x_hard_start_xmit,
2144         .ndo_get_stats          = smsc911x_get_stats,
2145         .ndo_set_rx_mode        = smsc911x_set_multicast_list,
2146         .ndo_do_ioctl           = smsc911x_do_ioctl,
2147         .ndo_change_mtu         = eth_change_mtu,
2148         .ndo_validate_addr      = eth_validate_addr,
2149         .ndo_set_mac_address    = smsc911x_set_mac_address,
2150 #ifdef CONFIG_NET_POLL_CONTROLLER
2151         .ndo_poll_controller    = smsc911x_poll_controller,
2152 #endif
2153 };
2154 
2155 /* copies the current mac address from hardware to dev->dev_addr */
2156 static void smsc911x_read_mac_address(struct net_device *dev)
2157 {
2158         struct smsc911x_data *pdata = netdev_priv(dev);
2159         u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2160         u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2161 
2162         dev->dev_addr[0] = (u8)(mac_low32);
2163         dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2164         dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2165         dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2166         dev->dev_addr[4] = (u8)(mac_high16);
2167         dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2168 }
2169 
2170 /* Initializing private device structures, only called from probe */
2171 static int smsc911x_init(struct net_device *dev)
2172 {
2173         struct smsc911x_data *pdata = netdev_priv(dev);
2174         unsigned int byte_test, mask;
2175         unsigned int to = 100;
2176 
2177         SMSC_TRACE(pdata, probe, "Driver Parameters:");
2178         SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2179                    (unsigned long)pdata->ioaddr);
2180         SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2181         SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2182 
2183         spin_lock_init(&pdata->dev_lock);
2184         spin_lock_init(&pdata->mac_lock);
2185 
2186         if (pdata->ioaddr == NULL) {
2187                 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2188                 return -ENODEV;
2189         }
2190 
2191         /*
2192          * poll the READY bit in PMT_CTRL. Any other access to the device is
2193          * forbidden while this bit isn't set. Try for 100ms
2194          *
2195          * Note that this test is done before the WORD_SWAP register is
2196          * programmed. So in some configurations the READY bit is at 16 before
2197          * WORD_SWAP is written to. This issue is worked around by waiting
2198          * until either bit 0 or bit 16 gets set in PMT_CTRL.
2199          *
2200          * SMSC has confirmed that checking bit 16 (marked as reserved in
2201          * the datasheet) is fine since these bits "will either never be set
2202          * or can only go high after READY does (so also indicate the device
2203          * is ready)".
2204          */
2205 
2206         mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2207         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2208                 udelay(1000);
2209 
2210         if (to == 0) {
2211                 netdev_err(dev, "Device not READY in 100ms aborting\n");
2212                 return -ENODEV;
2213         }
2214 
2215         /* Check byte ordering */
2216         byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2217         SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2218         if (byte_test == 0x43218765) {
2219                 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2220                            "applying WORD_SWAP");
2221                 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2222 
2223                 /* 1 dummy read of BYTE_TEST is needed after a write to
2224                  * WORD_SWAP before its contents are valid */
2225                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2226 
2227                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2228         }
2229 
2230         if (byte_test != 0x87654321) {
2231                 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2232                 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2233                         SMSC_WARN(pdata, probe,
2234                                   "top 16 bits equal to bottom 16 bits");
2235                         SMSC_TRACE(pdata, probe,
2236                                    "This may mean the chip is set "
2237                                    "for 32 bit while the bus is reading 16 bit");
2238                 }
2239                 return -ENODEV;
2240         }
2241 
2242         /* Default generation to zero (all workarounds apply) */
2243         pdata->generation = 0;
2244 
2245         pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2246         switch (pdata->idrev & 0xFFFF0000) {
2247         case 0x01180000:
2248         case 0x01170000:
2249         case 0x01160000:
2250         case 0x01150000:
2251         case 0x218A0000:
2252                 /* LAN911[5678] family */
2253                 pdata->generation = pdata->idrev & 0x0000FFFF;
2254                 break;
2255 
2256         case 0x118A0000:
2257         case 0x117A0000:
2258         case 0x116A0000:
2259         case 0x115A0000:
2260                 /* LAN921[5678] family */
2261                 pdata->generation = 3;
2262                 break;
2263 
2264         case 0x92100000:
2265         case 0x92110000:
2266         case 0x92200000:
2267         case 0x92210000:
2268                 /* LAN9210/LAN9211/LAN9220/LAN9221 */
2269                 pdata->generation = 4;
2270                 break;
2271 
2272         default:
2273                 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2274                           pdata->idrev);
2275                 return -ENODEV;
2276         }
2277 
2278         SMSC_TRACE(pdata, probe,
2279                    "LAN911x identified, idrev: 0x%08X, generation: %d",
2280                    pdata->idrev, pdata->generation);
2281 
2282         if (pdata->generation == 0)
2283                 SMSC_WARN(pdata, probe,
2284                           "This driver is not intended for this chip revision");
2285 
2286         /* workaround for platforms without an eeprom, where the mac address
2287          * is stored elsewhere and set by the bootloader.  This saves the
2288          * mac address before resetting the device */
2289         if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2290                 spin_lock_irq(&pdata->mac_lock);
2291                 smsc911x_read_mac_address(dev);
2292                 spin_unlock_irq(&pdata->mac_lock);
2293         }
2294 
2295         /* Reset the LAN911x */
2296         if (smsc911x_soft_reset(pdata))
2297                 return -ENODEV;
2298 
2299         dev->flags |= IFF_MULTICAST;
2300         netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2301         dev->netdev_ops = &smsc911x_netdev_ops;
2302         dev->ethtool_ops = &smsc911x_ethtool_ops;
2303 
2304         return 0;
2305 }
2306 
2307 static int smsc911x_drv_remove(struct platform_device *pdev)
2308 {
2309         struct net_device *dev;
2310         struct smsc911x_data *pdata;
2311         struct resource *res;
2312 
2313         dev = platform_get_drvdata(pdev);
2314         BUG_ON(!dev);
2315         pdata = netdev_priv(dev);
2316         BUG_ON(!pdata);
2317         BUG_ON(!pdata->ioaddr);
2318         BUG_ON(!pdata->phy_dev);
2319 
2320         SMSC_TRACE(pdata, ifdown, "Stopping driver");
2321 
2322         phy_disconnect(pdata->phy_dev);
2323         pdata->phy_dev = NULL;
2324         mdiobus_unregister(pdata->mii_bus);
2325         mdiobus_free(pdata->mii_bus);
2326 
2327         unregister_netdev(dev);
2328         free_irq(dev->irq, dev);
2329         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2330                                            "smsc911x-memory");
2331         if (!res)
2332                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2333 
2334         release_mem_region(res->start, resource_size(res));
2335 
2336         iounmap(pdata->ioaddr);
2337 
2338         (void)smsc911x_disable_resources(pdev);
2339         smsc911x_free_resources(pdev);
2340 
2341         free_netdev(dev);
2342 
2343         pm_runtime_put(&pdev->dev);
2344         pm_runtime_disable(&pdev->dev);
2345 
2346         return 0;
2347 }
2348 
2349 /* standard register acces */
2350 static const struct smsc911x_ops standard_smsc911x_ops = {
2351         .reg_read = __smsc911x_reg_read,
2352         .reg_write = __smsc911x_reg_write,
2353         .rx_readfifo = smsc911x_rx_readfifo,
2354         .tx_writefifo = smsc911x_tx_writefifo,
2355 };
2356 
2357 /* shifted register access */
2358 static const struct smsc911x_ops shifted_smsc911x_ops = {
2359         .reg_read = __smsc911x_reg_read_shift,
2360         .reg_write = __smsc911x_reg_write_shift,
2361         .rx_readfifo = smsc911x_rx_readfifo_shift,
2362         .tx_writefifo = smsc911x_tx_writefifo_shift,
2363 };
2364 
2365 #ifdef CONFIG_OF
2366 static int smsc911x_probe_config_dt(struct smsc911x_platform_config *config,
2367                                     struct device_node *np)
2368 {
2369         const char *mac;
2370         u32 width = 0;
2371 
2372         if (!np)
2373                 return -ENODEV;
2374 
2375         config->phy_interface = of_get_phy_mode(np);
2376 
2377         mac = of_get_mac_address(np);
2378         if (mac)
2379                 memcpy(config->mac, mac, ETH_ALEN);
2380 
2381         of_property_read_u32(np, "reg-shift", &config->shift);
2382 
2383         of_property_read_u32(np, "reg-io-width", &width);
2384         if (width == 4)
2385                 config->flags |= SMSC911X_USE_32BIT;
2386         else
2387                 config->flags |= SMSC911X_USE_16BIT;
2388 
2389         if (of_get_property(np, "smsc,irq-active-high", NULL))
2390                 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2391 
2392         if (of_get_property(np, "smsc,irq-push-pull", NULL))
2393                 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2394 
2395         if (of_get_property(np, "smsc,force-internal-phy", NULL))
2396                 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2397 
2398         if (of_get_property(np, "smsc,force-external-phy", NULL))
2399                 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2400 
2401         if (of_get_property(np, "smsc,save-mac-address", NULL))
2402                 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2403 
2404         return 0;
2405 }
2406 #else
2407 static inline int smsc911x_probe_config_dt(
2408                                 struct smsc911x_platform_config *config,
2409                                 struct device_node *np)
2410 {
2411         return -ENODEV;
2412 }
2413 #endif /* CONFIG_OF */
2414 
2415 static int smsc911x_drv_probe(struct platform_device *pdev)
2416 {
2417         struct device_node *np = pdev->dev.of_node;
2418         struct net_device *dev;
2419         struct smsc911x_data *pdata;
2420         struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2421         struct resource *res, *irq_res;
2422         unsigned int intcfg = 0;
2423         int res_size, irq_flags;
2424         int retval;
2425 
2426         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2427                                            "smsc911x-memory");
2428         if (!res)
2429                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2430         if (!res) {
2431                 pr_warn("Could not allocate resource\n");
2432                 retval = -ENODEV;
2433                 goto out_0;
2434         }
2435         res_size = resource_size(res);
2436 
2437         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2438         if (!irq_res) {
2439                 pr_warn("Could not allocate irq resource\n");
2440                 retval = -ENODEV;
2441                 goto out_0;
2442         }
2443 
2444         if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2445                 retval = -EBUSY;
2446                 goto out_0;
2447         }
2448 
2449         dev = alloc_etherdev(sizeof(struct smsc911x_data));
2450         if (!dev) {
2451                 retval = -ENOMEM;
2452                 goto out_release_io_1;
2453         }
2454 
2455         SET_NETDEV_DEV(dev, &pdev->dev);
2456 
2457         pdata = netdev_priv(dev);
2458         dev->irq = irq_res->start;
2459         irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
2460         pdata->ioaddr = ioremap_nocache(res->start, res_size);
2461 
2462         pdata->dev = dev;
2463         pdata->msg_enable = ((1 << debug) - 1);
2464 
2465         platform_set_drvdata(pdev, dev);
2466 
2467         retval = smsc911x_request_resources(pdev);
2468         if (retval)
2469                 goto out_request_resources_fail;
2470 
2471         retval = smsc911x_enable_resources(pdev);
2472         if (retval)
2473                 goto out_enable_resources_fail;
2474 
2475         if (pdata->ioaddr == NULL) {
2476                 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2477                 retval = -ENOMEM;
2478                 goto out_disable_resources;
2479         }
2480 
2481         retval = smsc911x_probe_config_dt(&pdata->config, np);
2482         if (retval && config) {
2483                 /* copy config parameters across to pdata */
2484                 memcpy(&pdata->config, config, sizeof(pdata->config));
2485                 retval = 0;
2486         }
2487 
2488         if (retval) {
2489                 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2490                 goto out_disable_resources;
2491         }
2492 
2493         /* assume standard, non-shifted, access to HW registers */
2494         pdata->ops = &standard_smsc911x_ops;
2495         /* apply the right access if shifting is needed */
2496         if (pdata->config.shift)
2497                 pdata->ops = &shifted_smsc911x_ops;
2498 
2499         pm_runtime_enable(&pdev->dev);
2500         pm_runtime_get_sync(&pdev->dev);
2501 
2502         retval = smsc911x_init(dev);
2503         if (retval < 0)
2504                 goto out_disable_resources;
2505 
2506         /* configure irq polarity and type before connecting isr */
2507         if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2508                 intcfg |= INT_CFG_IRQ_POL_;
2509 
2510         if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2511                 intcfg |= INT_CFG_IRQ_TYPE_;
2512 
2513         smsc911x_reg_write(pdata, INT_CFG, intcfg);
2514 
2515         /* Ensure interrupts are globally disabled before connecting ISR */
2516         smsc911x_disable_irq_chip(dev);
2517 
2518         retval = request_irq(dev->irq, smsc911x_irqhandler,
2519                              irq_flags | IRQF_SHARED, dev->name, dev);
2520         if (retval) {
2521                 SMSC_WARN(pdata, probe,
2522                           "Unable to claim requested irq: %d", dev->irq);
2523                 goto out_disable_resources;
2524         }
2525 
2526         netif_carrier_off(dev);
2527 
2528         retval = register_netdev(dev);
2529         if (retval) {
2530                 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2531                 goto out_free_irq;
2532         } else {
2533                 SMSC_TRACE(pdata, probe,
2534                            "Network interface: \"%s\"", dev->name);
2535         }
2536 
2537         retval = smsc911x_mii_init(pdev, dev);
2538         if (retval) {
2539                 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2540                 goto out_unregister_netdev_5;
2541         }
2542 
2543         spin_lock_irq(&pdata->mac_lock);
2544 
2545         /* Check if mac address has been specified when bringing interface up */
2546         if (is_valid_ether_addr(dev->dev_addr)) {
2547                 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2548                 SMSC_TRACE(pdata, probe,
2549                            "MAC Address is specified by configuration");
2550         } else if (is_valid_ether_addr(pdata->config.mac)) {
2551                 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2552                 SMSC_TRACE(pdata, probe,
2553                            "MAC Address specified by platform data");
2554         } else {
2555                 /* Try reading mac address from device. if EEPROM is present
2556                  * it will already have been set */
2557                 smsc_get_mac(dev);
2558 
2559                 if (is_valid_ether_addr(dev->dev_addr)) {
2560                         /* eeprom values are valid  so use them */
2561                         SMSC_TRACE(pdata, probe,
2562                                    "Mac Address is read from LAN911x EEPROM");
2563                 } else {
2564                         /* eeprom values are invalid, generate random MAC */
2565                         eth_hw_addr_random(dev);
2566                         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2567                         SMSC_TRACE(pdata, probe,
2568                                    "MAC Address is set to eth_random_addr");
2569                 }
2570         }
2571 
2572         spin_unlock_irq(&pdata->mac_lock);
2573 
2574         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2575 
2576         return 0;
2577 
2578 out_unregister_netdev_5:
2579         unregister_netdev(dev);
2580 out_free_irq:
2581         free_irq(dev->irq, dev);
2582 out_disable_resources:
2583         pm_runtime_put(&pdev->dev);
2584         pm_runtime_disable(&pdev->dev);
2585         (void)smsc911x_disable_resources(pdev);
2586 out_enable_resources_fail:
2587         smsc911x_free_resources(pdev);
2588 out_request_resources_fail:
2589         iounmap(pdata->ioaddr);
2590         free_netdev(dev);
2591 out_release_io_1:
2592         release_mem_region(res->start, resource_size(res));
2593 out_0:
2594         return retval;
2595 }
2596 
2597 #ifdef CONFIG_PM
2598 /* This implementation assumes the devices remains powered on its VDDVARIO
2599  * pins during suspend. */
2600 
2601 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2602 
2603 static int smsc911x_suspend(struct device *dev)
2604 {
2605         struct net_device *ndev = dev_get_drvdata(dev);
2606         struct smsc911x_data *pdata = netdev_priv(ndev);
2607 
2608         /* enable wake on LAN, energy detection and the external PME
2609          * signal. */
2610         smsc911x_reg_write(pdata, PMT_CTRL,
2611                 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2612                 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2613 
2614         return 0;
2615 }
2616 
2617 static int smsc911x_resume(struct device *dev)
2618 {
2619         struct net_device *ndev = dev_get_drvdata(dev);
2620         struct smsc911x_data *pdata = netdev_priv(ndev);
2621         unsigned int to = 100;
2622 
2623         /* Note 3.11 from the datasheet:
2624          *      "When the LAN9220 is in a power saving state, a write of any
2625          *       data to the BYTE_TEST register will wake-up the device."
2626          */
2627         smsc911x_reg_write(pdata, BYTE_TEST, 0);
2628 
2629         /* poll the READY bit in PMT_CTRL. Any other access to the device is
2630          * forbidden while this bit isn't set. Try for 100ms and return -EIO
2631          * if it failed. */
2632         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2633                 udelay(1000);
2634 
2635         return (to == 0) ? -EIO : 0;
2636 }
2637 
2638 static const struct dev_pm_ops smsc911x_pm_ops = {
2639         .suspend        = smsc911x_suspend,
2640         .resume         = smsc911x_resume,
2641 };
2642 
2643 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2644 
2645 #else
2646 #define SMSC911X_PM_OPS NULL
2647 #endif
2648 
2649 #ifdef CONFIG_OF
2650 static const struct of_device_id smsc911x_dt_ids[] = {
2651         { .compatible = "smsc,lan9115", },
2652         { /* sentinel */ }
2653 };
2654 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2655 #endif
2656 
2657 static struct platform_driver smsc911x_driver = {
2658         .probe = smsc911x_drv_probe,
2659         .remove = smsc911x_drv_remove,
2660         .driver = {
2661                 .name   = SMSC_CHIPNAME,
2662                 .pm     = SMSC911X_PM_OPS,
2663                 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2664         },
2665 };
2666 
2667 /* Entry point for loading the module */
2668 static int __init smsc911x_init_module(void)
2669 {
2670         SMSC_INITIALIZE();
2671         return platform_driver_register(&smsc911x_driver);
2672 }
2673 
2674 /* entry point for unloading the module */
2675 static void __exit smsc911x_cleanup_module(void)
2676 {
2677         platform_driver_unregister(&smsc911x_driver);
2678 }
2679 
2680 module_init(smsc911x_init_module);
2681 module_exit(smsc911x_cleanup_module);
2682 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us