Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 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

Linux/drivers/net/ethernet/sun/sunhme.c

  1 /* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
  2  *           auto carrier detecting ethernet driver.  Also known as the
  3  *           "Happy Meal Ethernet" found on SunSwift SBUS cards.
  4  *
  5  * Copyright (C) 1996, 1998, 1999, 2002, 2003,
  6  *              2006, 2008 David S. Miller (davem@davemloft.net)
  7  *
  8  * Changes :
  9  * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
 10  *   - port to non-sparc architectures. Tested only on x86 and
 11  *     only currently works with QFE PCI cards.
 12  *   - ability to specify the MAC address at module load time by passing this
 13  *     argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
 14  */
 15 
 16 #include <linux/module.h>
 17 #include <linux/kernel.h>
 18 #include <linux/types.h>
 19 #include <linux/fcntl.h>
 20 #include <linux/interrupt.h>
 21 #include <linux/ioport.h>
 22 #include <linux/in.h>
 23 #include <linux/slab.h>
 24 #include <linux/string.h>
 25 #include <linux/delay.h>
 26 #include <linux/init.h>
 27 #include <linux/ethtool.h>
 28 #include <linux/mii.h>
 29 #include <linux/crc32.h>
 30 #include <linux/random.h>
 31 #include <linux/errno.h>
 32 #include <linux/netdevice.h>
 33 #include <linux/etherdevice.h>
 34 #include <linux/skbuff.h>
 35 #include <linux/mm.h>
 36 #include <linux/bitops.h>
 37 #include <linux/dma-mapping.h>
 38 
 39 #include <asm/io.h>
 40 #include <asm/dma.h>
 41 #include <asm/byteorder.h>
 42 
 43 #ifdef CONFIG_SPARC
 44 #include <linux/of.h>
 45 #include <linux/of_device.h>
 46 #include <asm/idprom.h>
 47 #include <asm/openprom.h>
 48 #include <asm/oplib.h>
 49 #include <asm/prom.h>
 50 #include <asm/auxio.h>
 51 #endif
 52 #include <asm/uaccess.h>
 53 
 54 #include <asm/pgtable.h>
 55 #include <asm/irq.h>
 56 
 57 #ifdef CONFIG_PCI
 58 #include <linux/pci.h>
 59 #endif
 60 
 61 #include "sunhme.h"
 62 
 63 #define DRV_NAME        "sunhme"
 64 #define DRV_VERSION     "3.10"
 65 #define DRV_RELDATE     "August 26, 2008"
 66 #define DRV_AUTHOR      "David S. Miller (davem@davemloft.net)"
 67 
 68 static char version[] =
 69         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
 70 
 71 MODULE_VERSION(DRV_VERSION);
 72 MODULE_AUTHOR(DRV_AUTHOR);
 73 MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
 74 MODULE_LICENSE("GPL");
 75 
 76 static int macaddr[6];
 77 
 78 /* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
 79 module_param_array(macaddr, int, NULL, 0);
 80 MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
 81 
 82 #ifdef CONFIG_SBUS
 83 static struct quattro *qfe_sbus_list;
 84 #endif
 85 
 86 #ifdef CONFIG_PCI
 87 static struct quattro *qfe_pci_list;
 88 #endif
 89 
 90 #undef HMEDEBUG
 91 #undef SXDEBUG
 92 #undef RXDEBUG
 93 #undef TXDEBUG
 94 #undef TXLOGGING
 95 
 96 #ifdef TXLOGGING
 97 struct hme_tx_logent {
 98         unsigned int tstamp;
 99         int tx_new, tx_old;
100         unsigned int action;
101 #define TXLOG_ACTION_IRQ        0x01
102 #define TXLOG_ACTION_TXMIT      0x02
103 #define TXLOG_ACTION_TBUSY      0x04
104 #define TXLOG_ACTION_NBUFS      0x08
105         unsigned int status;
106 };
107 #define TX_LOG_LEN      128
108 static struct hme_tx_logent tx_log[TX_LOG_LEN];
109 static int txlog_cur_entry;
110 static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
111 {
112         struct hme_tx_logent *tlp;
113         unsigned long flags;
114 
115         local_irq_save(flags);
116         tlp = &tx_log[txlog_cur_entry];
117         tlp->tstamp = (unsigned int)jiffies;
118         tlp->tx_new = hp->tx_new;
119         tlp->tx_old = hp->tx_old;
120         tlp->action = a;
121         tlp->status = s;
122         txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
123         local_irq_restore(flags);
124 }
125 static __inline__ void tx_dump_log(void)
126 {
127         int i, this;
128 
129         this = txlog_cur_entry;
130         for (i = 0; i < TX_LOG_LEN; i++) {
131                 printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
132                        tx_log[this].tstamp,
133                        tx_log[this].tx_new, tx_log[this].tx_old,
134                        tx_log[this].action, tx_log[this].status);
135                 this = (this + 1) & (TX_LOG_LEN - 1);
136         }
137 }
138 static __inline__ void tx_dump_ring(struct happy_meal *hp)
139 {
140         struct hmeal_init_block *hb = hp->happy_block;
141         struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
142         int i;
143 
144         for (i = 0; i < TX_RING_SIZE; i+=4) {
145                 printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
146                        i, i + 4,
147                        le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
148                        le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
149                        le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
150                        le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
151         }
152 }
153 #else
154 #define tx_add_log(hp, a, s)            do { } while(0)
155 #define tx_dump_log()                   do { } while(0)
156 #define tx_dump_ring(hp)                do { } while(0)
157 #endif
158 
159 #ifdef HMEDEBUG
160 #define HMD(x)  printk x
161 #else
162 #define HMD(x)
163 #endif
164 
165 /* #define AUTO_SWITCH_DEBUG */
166 
167 #ifdef AUTO_SWITCH_DEBUG
168 #define ASD(x)  printk x
169 #else
170 #define ASD(x)
171 #endif
172 
173 #define DEFAULT_IPG0      16 /* For lance-mode only */
174 #define DEFAULT_IPG1       8 /* For all modes */
175 #define DEFAULT_IPG2       4 /* For all modes */
176 #define DEFAULT_JAMSIZE    4 /* Toe jam */
177 
178 /* NOTE: In the descriptor writes one _must_ write the address
179  *       member _first_.  The card must not be allowed to see
180  *       the updated descriptor flags until the address is
181  *       correct.  I've added a write memory barrier between
182  *       the two stores so that I can sleep well at night... -DaveM
183  */
184 
185 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
186 static void sbus_hme_write32(void __iomem *reg, u32 val)
187 {
188         sbus_writel(val, reg);
189 }
190 
191 static u32 sbus_hme_read32(void __iomem *reg)
192 {
193         return sbus_readl(reg);
194 }
195 
196 static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
197 {
198         rxd->rx_addr = (__force hme32)addr;
199         wmb();
200         rxd->rx_flags = (__force hme32)flags;
201 }
202 
203 static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
204 {
205         txd->tx_addr = (__force hme32)addr;
206         wmb();
207         txd->tx_flags = (__force hme32)flags;
208 }
209 
210 static u32 sbus_hme_read_desc32(hme32 *p)
211 {
212         return (__force u32)*p;
213 }
214 
215 static void pci_hme_write32(void __iomem *reg, u32 val)
216 {
217         writel(val, reg);
218 }
219 
220 static u32 pci_hme_read32(void __iomem *reg)
221 {
222         return readl(reg);
223 }
224 
225 static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
226 {
227         rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
228         wmb();
229         rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
230 }
231 
232 static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
233 {
234         txd->tx_addr = (__force hme32)cpu_to_le32(addr);
235         wmb();
236         txd->tx_flags = (__force hme32)cpu_to_le32(flags);
237 }
238 
239 static u32 pci_hme_read_desc32(hme32 *p)
240 {
241         return le32_to_cpup((__le32 *)p);
242 }
243 
244 #define hme_write32(__hp, __reg, __val) \
245         ((__hp)->write32((__reg), (__val)))
246 #define hme_read32(__hp, __reg) \
247         ((__hp)->read32(__reg))
248 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
249         ((__hp)->write_rxd((__rxd), (__flags), (__addr)))
250 #define hme_write_txd(__hp, __txd, __flags, __addr) \
251         ((__hp)->write_txd((__txd), (__flags), (__addr)))
252 #define hme_read_desc32(__hp, __p) \
253         ((__hp)->read_desc32(__p))
254 #define hme_dma_map(__hp, __ptr, __size, __dir) \
255         ((__hp)->dma_map((__hp)->dma_dev, (__ptr), (__size), (__dir)))
256 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
257         ((__hp)->dma_unmap((__hp)->dma_dev, (__addr), (__size), (__dir)))
258 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
259         ((__hp)->dma_sync_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir)))
260 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
261         ((__hp)->dma_sync_for_device((__hp)->dma_dev, (__addr), (__size), (__dir)))
262 #else
263 #ifdef CONFIG_SBUS
264 /* SBUS only compilation */
265 #define hme_write32(__hp, __reg, __val) \
266         sbus_writel((__val), (__reg))
267 #define hme_read32(__hp, __reg) \
268         sbus_readl(__reg)
269 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
270 do {    (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
271         wmb(); \
272         (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
273 } while(0)
274 #define hme_write_txd(__hp, __txd, __flags, __addr) \
275 do {    (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
276         wmb(); \
277         (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
278 } while(0)
279 #define hme_read_desc32(__hp, __p)      ((__force u32)(hme32)*(__p))
280 #define hme_dma_map(__hp, __ptr, __size, __dir) \
281         dma_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
282 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
283         dma_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
284 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
285         dma_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
286 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
287         dma_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
288 #else
289 /* PCI only compilation */
290 #define hme_write32(__hp, __reg, __val) \
291         writel((__val), (__reg))
292 #define hme_read32(__hp, __reg) \
293         readl(__reg)
294 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
295 do {    (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
296         wmb(); \
297         (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
298 } while(0)
299 #define hme_write_txd(__hp, __txd, __flags, __addr) \
300 do {    (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
301         wmb(); \
302         (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
303 } while(0)
304 static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
305 {
306         return le32_to_cpup((__le32 *)p);
307 }
308 #define hme_dma_map(__hp, __ptr, __size, __dir) \
309         pci_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
310 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
311         pci_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
312 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
313         pci_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
314 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
315         pci_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
316 #endif
317 #endif
318 
319 
320 /* Oh yes, the MIF BitBang is mighty fun to program.  BitBucket is more like it. */
321 static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
322 {
323         hme_write32(hp, tregs + TCVR_BBDATA, bit);
324         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
325         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
326 }
327 
328 #if 0
329 static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
330 {
331         u32 ret;
332 
333         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
334         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
335         ret = hme_read32(hp, tregs + TCVR_CFG);
336         if (internal)
337                 ret &= TCV_CFG_MDIO0;
338         else
339                 ret &= TCV_CFG_MDIO1;
340 
341         return ret;
342 }
343 #endif
344 
345 static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
346 {
347         u32 retval;
348 
349         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
350         udelay(1);
351         retval = hme_read32(hp, tregs + TCVR_CFG);
352         if (internal)
353                 retval &= TCV_CFG_MDIO0;
354         else
355                 retval &= TCV_CFG_MDIO1;
356         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
357 
358         return retval;
359 }
360 
361 #define TCVR_FAILURE      0x80000000     /* Impossible MIF read value */
362 
363 static int happy_meal_bb_read(struct happy_meal *hp,
364                               void __iomem *tregs, int reg)
365 {
366         u32 tmp;
367         int retval = 0;
368         int i;
369 
370         ASD(("happy_meal_bb_read: reg=%d ", reg));
371 
372         /* Enable the MIF BitBang outputs. */
373         hme_write32(hp, tregs + TCVR_BBOENAB, 1);
374 
375         /* Force BitBang into the idle state. */
376         for (i = 0; i < 32; i++)
377                 BB_PUT_BIT(hp, tregs, 1);
378 
379         /* Give it the read sequence. */
380         BB_PUT_BIT(hp, tregs, 0);
381         BB_PUT_BIT(hp, tregs, 1);
382         BB_PUT_BIT(hp, tregs, 1);
383         BB_PUT_BIT(hp, tregs, 0);
384 
385         /* Give it the PHY address. */
386         tmp = hp->paddr & 0xff;
387         for (i = 4; i >= 0; i--)
388                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
389 
390         /* Tell it what register we want to read. */
391         tmp = (reg & 0xff);
392         for (i = 4; i >= 0; i--)
393                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
394 
395         /* Close down the MIF BitBang outputs. */
396         hme_write32(hp, tregs + TCVR_BBOENAB, 0);
397 
398         /* Now read in the value. */
399         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
400         for (i = 15; i >= 0; i--)
401                 retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
402         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
403         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
404         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
405         ASD(("value=%x\n", retval));
406         return retval;
407 }
408 
409 static void happy_meal_bb_write(struct happy_meal *hp,
410                                 void __iomem *tregs, int reg,
411                                 unsigned short value)
412 {
413         u32 tmp;
414         int i;
415 
416         ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));
417 
418         /* Enable the MIF BitBang outputs. */
419         hme_write32(hp, tregs + TCVR_BBOENAB, 1);
420 
421         /* Force BitBang into the idle state. */
422         for (i = 0; i < 32; i++)
423                 BB_PUT_BIT(hp, tregs, 1);
424 
425         /* Give it write sequence. */
426         BB_PUT_BIT(hp, tregs, 0);
427         BB_PUT_BIT(hp, tregs, 1);
428         BB_PUT_BIT(hp, tregs, 0);
429         BB_PUT_BIT(hp, tregs, 1);
430 
431         /* Give it the PHY address. */
432         tmp = (hp->paddr & 0xff);
433         for (i = 4; i >= 0; i--)
434                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
435 
436         /* Tell it what register we will be writing. */
437         tmp = (reg & 0xff);
438         for (i = 4; i >= 0; i--)
439                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
440 
441         /* Tell it to become ready for the bits. */
442         BB_PUT_BIT(hp, tregs, 1);
443         BB_PUT_BIT(hp, tregs, 0);
444 
445         for (i = 15; i >= 0; i--)
446                 BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
447 
448         /* Close down the MIF BitBang outputs. */
449         hme_write32(hp, tregs + TCVR_BBOENAB, 0);
450 }
451 
452 #define TCVR_READ_TRIES   16
453 
454 static int happy_meal_tcvr_read(struct happy_meal *hp,
455                                 void __iomem *tregs, int reg)
456 {
457         int tries = TCVR_READ_TRIES;
458         int retval;
459 
460         ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
461         if (hp->tcvr_type == none) {
462                 ASD(("no transceiver, value=TCVR_FAILURE\n"));
463                 return TCVR_FAILURE;
464         }
465 
466         if (!(hp->happy_flags & HFLAG_FENABLE)) {
467                 ASD(("doing bit bang\n"));
468                 return happy_meal_bb_read(hp, tregs, reg);
469         }
470 
471         hme_write32(hp, tregs + TCVR_FRAME,
472                     (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
473         while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
474                 udelay(20);
475         if (!tries) {
476                 printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
477                 return TCVR_FAILURE;
478         }
479         retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
480         ASD(("value=%04x\n", retval));
481         return retval;
482 }
483 
484 #define TCVR_WRITE_TRIES  16
485 
486 static void happy_meal_tcvr_write(struct happy_meal *hp,
487                                   void __iomem *tregs, int reg,
488                                   unsigned short value)
489 {
490         int tries = TCVR_WRITE_TRIES;
491 
492         ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));
493 
494         /* Welcome to Sun Microsystems, can I take your order please? */
495         if (!(hp->happy_flags & HFLAG_FENABLE)) {
496                 happy_meal_bb_write(hp, tregs, reg, value);
497                 return;
498         }
499 
500         /* Would you like fries with that? */
501         hme_write32(hp, tregs + TCVR_FRAME,
502                     (FRAME_WRITE | (hp->paddr << 23) |
503                      ((reg & 0xff) << 18) | (value & 0xffff)));
504         while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
505                 udelay(20);
506 
507         /* Anything else? */
508         if (!tries)
509                 printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");
510 
511         /* Fifty-two cents is your change, have a nice day. */
512 }
513 
514 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
515  * that keeps watching the auto negotiation process as it progresses.
516  * The DP83840 is first told to start doing it's thing, we set up the time
517  * and place the timer state machine in it's initial state.
518  *
519  * Here the timer peeks at the DP83840 status registers at each click to see
520  * if the auto negotiation has completed, we assume here that the DP83840 PHY
521  * will time out at some point and just tell us what (didn't) happen.  For
522  * complete coverage we only allow so many of the ticks at this level to run,
523  * when this has expired we print a warning message and try another strategy.
524  * This "other" strategy is to force the interface into various speed/duplex
525  * configurations and we stop when we see a link-up condition before the
526  * maximum number of "peek" ticks have occurred.
527  *
528  * Once a valid link status has been detected we configure the BigMAC and
529  * the rest of the Happy Meal to speak the most efficient protocol we could
530  * get a clean link for.  The priority for link configurations, highest first
531  * is:
532  *                 100 Base-T Full Duplex
533  *                 100 Base-T Half Duplex
534  *                 10 Base-T Full Duplex
535  *                 10 Base-T Half Duplex
536  *
537  * We start a new timer now, after a successful auto negotiation status has
538  * been detected.  This timer just waits for the link-up bit to get set in
539  * the BMCR of the DP83840.  When this occurs we print a kernel log message
540  * describing the link type in use and the fact that it is up.
541  *
542  * If a fatal error of some sort is signalled and detected in the interrupt
543  * service routine, and the chip is reset, or the link is ifconfig'd down
544  * and then back up, this entire process repeats itself all over again.
545  */
546 static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
547 {
548         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
549 
550         /* Downgrade from full to half duplex.  Only possible
551          * via ethtool.
552          */
553         if (hp->sw_bmcr & BMCR_FULLDPLX) {
554                 hp->sw_bmcr &= ~(BMCR_FULLDPLX);
555                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
556                 return 0;
557         }
558 
559         /* Downgrade from 100 to 10. */
560         if (hp->sw_bmcr & BMCR_SPEED100) {
561                 hp->sw_bmcr &= ~(BMCR_SPEED100);
562                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
563                 return 0;
564         }
565 
566         /* We've tried everything. */
567         return -1;
568 }
569 
570 static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
571 {
572         printk(KERN_INFO "%s: Link is up using ", hp->dev->name);
573         if (hp->tcvr_type == external)
574                 printk("external ");
575         else
576                 printk("internal ");
577         printk("transceiver at ");
578         hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
579         if (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) {
580                 if (hp->sw_lpa & LPA_100FULL)
581                         printk("100Mb/s, Full Duplex.\n");
582                 else
583                         printk("100Mb/s, Half Duplex.\n");
584         } else {
585                 if (hp->sw_lpa & LPA_10FULL)
586                         printk("10Mb/s, Full Duplex.\n");
587                 else
588                         printk("10Mb/s, Half Duplex.\n");
589         }
590 }
591 
592 static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
593 {
594         printk(KERN_INFO "%s: Link has been forced up using ", hp->dev->name);
595         if (hp->tcvr_type == external)
596                 printk("external ");
597         else
598                 printk("internal ");
599         printk("transceiver at ");
600         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
601         if (hp->sw_bmcr & BMCR_SPEED100)
602                 printk("100Mb/s, ");
603         else
604                 printk("10Mb/s, ");
605         if (hp->sw_bmcr & BMCR_FULLDPLX)
606                 printk("Full Duplex.\n");
607         else
608                 printk("Half Duplex.\n");
609 }
610 
611 static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
612 {
613         int full;
614 
615         /* All we care about is making sure the bigmac tx_cfg has a
616          * proper duplex setting.
617          */
618         if (hp->timer_state == arbwait) {
619                 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
620                 if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
621                         goto no_response;
622                 if (hp->sw_lpa & LPA_100FULL)
623                         full = 1;
624                 else if (hp->sw_lpa & LPA_100HALF)
625                         full = 0;
626                 else if (hp->sw_lpa & LPA_10FULL)
627                         full = 1;
628                 else
629                         full = 0;
630         } else {
631                 /* Forcing a link mode. */
632                 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
633                 if (hp->sw_bmcr & BMCR_FULLDPLX)
634                         full = 1;
635                 else
636                         full = 0;
637         }
638 
639         /* Before changing other bits in the tx_cfg register, and in
640          * general any of other the TX config registers too, you
641          * must:
642          * 1) Clear Enable
643          * 2) Poll with reads until that bit reads back as zero
644          * 3) Make TX configuration changes
645          * 4) Set Enable once more
646          */
647         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
648                     hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
649                     ~(BIGMAC_TXCFG_ENABLE));
650         while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
651                 barrier();
652         if (full) {
653                 hp->happy_flags |= HFLAG_FULL;
654                 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
655                             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
656                             BIGMAC_TXCFG_FULLDPLX);
657         } else {
658                 hp->happy_flags &= ~(HFLAG_FULL);
659                 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
660                             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
661                             ~(BIGMAC_TXCFG_FULLDPLX));
662         }
663         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
664                     hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
665                     BIGMAC_TXCFG_ENABLE);
666         return 0;
667 no_response:
668         return 1;
669 }
670 
671 static int happy_meal_init(struct happy_meal *hp);
672 
673 static int is_lucent_phy(struct happy_meal *hp)
674 {
675         void __iomem *tregs = hp->tcvregs;
676         unsigned short mr2, mr3;
677         int ret = 0;
678 
679         mr2 = happy_meal_tcvr_read(hp, tregs, 2);
680         mr3 = happy_meal_tcvr_read(hp, tregs, 3);
681         if ((mr2 & 0xffff) == 0x0180 &&
682             ((mr3 & 0xffff) >> 10) == 0x1d)
683                 ret = 1;
684 
685         return ret;
686 }
687 
688 static void happy_meal_timer(unsigned long data)
689 {
690         struct happy_meal *hp = (struct happy_meal *) data;
691         void __iomem *tregs = hp->tcvregs;
692         int restart_timer = 0;
693 
694         spin_lock_irq(&hp->happy_lock);
695 
696         hp->timer_ticks++;
697         switch(hp->timer_state) {
698         case arbwait:
699                 /* Only allow for 5 ticks, thats 10 seconds and much too
700                  * long to wait for arbitration to complete.
701                  */
702                 if (hp->timer_ticks >= 10) {
703                         /* Enter force mode. */
704         do_force_mode:
705                         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
706                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
707                                hp->dev->name);
708                         hp->sw_bmcr = BMCR_SPEED100;
709                         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
710 
711                         if (!is_lucent_phy(hp)) {
712                                 /* OK, seems we need do disable the transceiver for the first
713                                  * tick to make sure we get an accurate link state at the
714                                  * second tick.
715                                  */
716                                 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
717                                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
718                                 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
719                         }
720                         hp->timer_state = ltrywait;
721                         hp->timer_ticks = 0;
722                         restart_timer = 1;
723                 } else {
724                         /* Anything interesting happen? */
725                         hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
726                         if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
727                                 int ret;
728 
729                                 /* Just what we've been waiting for... */
730                                 ret = set_happy_link_modes(hp, tregs);
731                                 if (ret) {
732                                         /* Ooops, something bad happened, go to force
733                                          * mode.
734                                          *
735                                          * XXX Broken hubs which don't support 802.3u
736                                          * XXX auto-negotiation make this happen as well.
737                                          */
738                                         goto do_force_mode;
739                                 }
740 
741                                 /* Success, at least so far, advance our state engine. */
742                                 hp->timer_state = lupwait;
743                                 restart_timer = 1;
744                         } else {
745                                 restart_timer = 1;
746                         }
747                 }
748                 break;
749 
750         case lupwait:
751                 /* Auto negotiation was successful and we are awaiting a
752                  * link up status.  I have decided to let this timer run
753                  * forever until some sort of error is signalled, reporting
754                  * a message to the user at 10 second intervals.
755                  */
756                 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
757                 if (hp->sw_bmsr & BMSR_LSTATUS) {
758                         /* Wheee, it's up, display the link mode in use and put
759                          * the timer to sleep.
760                          */
761                         display_link_mode(hp, tregs);
762                         hp->timer_state = asleep;
763                         restart_timer = 0;
764                 } else {
765                         if (hp->timer_ticks >= 10) {
766                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
767                                        "not completely up.\n", hp->dev->name);
768                                 hp->timer_ticks = 0;
769                                 restart_timer = 1;
770                         } else {
771                                 restart_timer = 1;
772                         }
773                 }
774                 break;
775 
776         case ltrywait:
777                 /* Making the timeout here too long can make it take
778                  * annoyingly long to attempt all of the link mode
779                  * permutations, but then again this is essentially
780                  * error recovery code for the most part.
781                  */
782                 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
783                 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
784                 if (hp->timer_ticks == 1) {
785                         if (!is_lucent_phy(hp)) {
786                                 /* Re-enable transceiver, we'll re-enable the transceiver next
787                                  * tick, then check link state on the following tick.
788                                  */
789                                 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
790                                 happy_meal_tcvr_write(hp, tregs,
791                                                       DP83840_CSCONFIG, hp->sw_csconfig);
792                         }
793                         restart_timer = 1;
794                         break;
795                 }
796                 if (hp->timer_ticks == 2) {
797                         if (!is_lucent_phy(hp)) {
798                                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
799                                 happy_meal_tcvr_write(hp, tregs,
800                                                       DP83840_CSCONFIG, hp->sw_csconfig);
801                         }
802                         restart_timer = 1;
803                         break;
804                 }
805                 if (hp->sw_bmsr & BMSR_LSTATUS) {
806                         /* Force mode selection success. */
807                         display_forced_link_mode(hp, tregs);
808                         set_happy_link_modes(hp, tregs); /* XXX error? then what? */
809                         hp->timer_state = asleep;
810                         restart_timer = 0;
811                 } else {
812                         if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
813                                 int ret;
814 
815                                 ret = try_next_permutation(hp, tregs);
816                                 if (ret == -1) {
817                                         /* Aieee, tried them all, reset the
818                                          * chip and try all over again.
819                                          */
820 
821                                         /* Let the user know... */
822                                         printk(KERN_NOTICE "%s: Link down, cable problem?\n",
823                                                hp->dev->name);
824 
825                                         ret = happy_meal_init(hp);
826                                         if (ret) {
827                                                 /* ho hum... */
828                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
829                                                        "Happy Meal.\n", hp->dev->name);
830                                         }
831                                         goto out;
832                                 }
833                                 if (!is_lucent_phy(hp)) {
834                                         hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
835                                                                                DP83840_CSCONFIG);
836                                         hp->sw_csconfig |= CSCONFIG_TCVDISAB;
837                                         happy_meal_tcvr_write(hp, tregs,
838                                                               DP83840_CSCONFIG, hp->sw_csconfig);
839                                 }
840                                 hp->timer_ticks = 0;
841                                 restart_timer = 1;
842                         } else {
843                                 restart_timer = 1;
844                         }
845                 }
846                 break;
847 
848         case asleep:
849         default:
850                 /* Can't happens.... */
851                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
852                        hp->dev->name);
853                 restart_timer = 0;
854                 hp->timer_ticks = 0;
855                 hp->timer_state = asleep; /* foo on you */
856                 break;
857         }
858 
859         if (restart_timer) {
860                 hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
861                 add_timer(&hp->happy_timer);
862         }
863 
864 out:
865         spin_unlock_irq(&hp->happy_lock);
866 }
867 
868 #define TX_RESET_TRIES     32
869 #define RX_RESET_TRIES     32
870 
871 /* hp->happy_lock must be held */
872 static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
873 {
874         int tries = TX_RESET_TRIES;
875 
876         HMD(("happy_meal_tx_reset: reset, "));
877 
878         /* Would you like to try our SMCC Delux? */
879         hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
880         while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
881                 udelay(20);
882 
883         /* Lettuce, tomato, buggy hardware (no extra charge)? */
884         if (!tries)
885                 printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");
886 
887         /* Take care. */
888         HMD(("done\n"));
889 }
890 
891 /* hp->happy_lock must be held */
892 static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
893 {
894         int tries = RX_RESET_TRIES;
895 
896         HMD(("happy_meal_rx_reset: reset, "));
897 
898         /* We have a special on GNU/Viking hardware bugs today. */
899         hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
900         while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
901                 udelay(20);
902 
903         /* Will that be all? */
904         if (!tries)
905                 printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");
906 
907         /* Don't forget your vik_1137125_wa.  Have a nice day. */
908         HMD(("done\n"));
909 }
910 
911 #define STOP_TRIES         16
912 
913 /* hp->happy_lock must be held */
914 static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
915 {
916         int tries = STOP_TRIES;
917 
918         HMD(("happy_meal_stop: reset, "));
919 
920         /* We're consolidating our STB products, it's your lucky day. */
921         hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
922         while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
923                 udelay(20);
924 
925         /* Come back next week when we are "Sun Microelectronics". */
926         if (!tries)
927                 printk(KERN_ERR "happy meal: Fry guys.");
928 
929         /* Remember: "Different name, same old buggy as shit hardware." */
930         HMD(("done\n"));
931 }
932 
933 /* hp->happy_lock must be held */
934 static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
935 {
936         struct net_device_stats *stats = &hp->net_stats;
937 
938         stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
939         hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
940 
941         stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
942         hme_write32(hp, bregs + BMAC_UNALECTR, 0);
943 
944         stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
945         hme_write32(hp, bregs + BMAC_GLECTR, 0);
946 
947         stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
948 
949         stats->collisions +=
950                 (hme_read32(hp, bregs + BMAC_EXCTR) +
951                  hme_read32(hp, bregs + BMAC_LTCTR));
952         hme_write32(hp, bregs + BMAC_EXCTR, 0);
953         hme_write32(hp, bregs + BMAC_LTCTR, 0);
954 }
955 
956 /* hp->happy_lock must be held */
957 static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
958 {
959         ASD(("happy_meal_poll_stop: "));
960 
961         /* If polling disabled or not polling already, nothing to do. */
962         if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
963            (HFLAG_POLLENABLE | HFLAG_POLL)) {
964                 HMD(("not polling, return\n"));
965                 return;
966         }
967 
968         /* Shut up the MIF. */
969         ASD(("were polling, mif ints off, "));
970         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
971 
972         /* Turn off polling. */
973         ASD(("polling off, "));
974         hme_write32(hp, tregs + TCVR_CFG,
975                     hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
976 
977         /* We are no longer polling. */
978         hp->happy_flags &= ~(HFLAG_POLL);
979 
980         /* Let the bits set. */
981         udelay(200);
982         ASD(("done\n"));
983 }
984 
985 /* Only Sun can take such nice parts and fuck up the programming interface
986  * like this.  Good job guys...
987  */
988 #define TCVR_RESET_TRIES       16 /* It should reset quickly        */
989 #define TCVR_UNISOLATE_TRIES   32 /* Dis-isolation can take longer. */
990 
991 /* hp->happy_lock must be held */
992 static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
993 {
994         u32 tconfig;
995         int result, tries = TCVR_RESET_TRIES;
996 
997         tconfig = hme_read32(hp, tregs + TCVR_CFG);
998         ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
999         if (hp->tcvr_type == external) {
1000                 ASD(("external<"));
1001                 hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
1002                 hp->tcvr_type = internal;
1003                 hp->paddr = TCV_PADDR_ITX;
1004                 ASD(("ISOLATE,"));
1005                 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1006                                       (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1007                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1008                 if (result == TCVR_FAILURE) {
1009                         ASD(("phyread_fail>\n"));
1010                         return -1;
1011                 }
1012                 ASD(("phyread_ok,PSELECT>"));
1013                 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1014                 hp->tcvr_type = external;
1015                 hp->paddr = TCV_PADDR_ETX;
1016         } else {
1017                 if (tconfig & TCV_CFG_MDIO1) {
1018                         ASD(("internal<PSELECT,"));
1019                         hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
1020                         ASD(("ISOLATE,"));
1021                         happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1022                                               (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1023                         result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1024                         if (result == TCVR_FAILURE) {
1025                                 ASD(("phyread_fail>\n"));
1026                                 return -1;
1027                         }
1028                         ASD(("phyread_ok,~PSELECT>"));
1029                         hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
1030                         hp->tcvr_type = internal;
1031                         hp->paddr = TCV_PADDR_ITX;
1032                 }
1033         }
1034 
1035         ASD(("BMCR_RESET "));
1036         happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
1037 
1038         while (--tries) {
1039                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1040                 if (result == TCVR_FAILURE)
1041                         return -1;
1042                 hp->sw_bmcr = result;
1043                 if (!(result & BMCR_RESET))
1044                         break;
1045                 udelay(20);
1046         }
1047         if (!tries) {
1048                 ASD(("BMCR RESET FAILED!\n"));
1049                 return -1;
1050         }
1051         ASD(("RESET_OK\n"));
1052 
1053         /* Get fresh copies of the PHY registers. */
1054         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1055         hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1056         hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1057         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1058 
1059         ASD(("UNISOLATE"));
1060         hp->sw_bmcr &= ~(BMCR_ISOLATE);
1061         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1062 
1063         tries = TCVR_UNISOLATE_TRIES;
1064         while (--tries) {
1065                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1066                 if (result == TCVR_FAILURE)
1067                         return -1;
1068                 if (!(result & BMCR_ISOLATE))
1069                         break;
1070                 udelay(20);
1071         }
1072         if (!tries) {
1073                 ASD((" FAILED!\n"));
1074                 return -1;
1075         }
1076         ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
1077         if (!is_lucent_phy(hp)) {
1078                 result = happy_meal_tcvr_read(hp, tregs,
1079                                               DP83840_CSCONFIG);
1080                 happy_meal_tcvr_write(hp, tregs,
1081                                       DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
1082         }
1083         return 0;
1084 }
1085 
1086 /* Figure out whether we have an internal or external transceiver.
1087  *
1088  * hp->happy_lock must be held
1089  */
1090 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
1091 {
1092         unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
1093 
1094         ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
1095         if (hp->happy_flags & HFLAG_POLL) {
1096                 /* If we are polling, we must stop to get the transceiver type. */
1097                 ASD(("<polling> "));
1098                 if (hp->tcvr_type == internal) {
1099                         if (tconfig & TCV_CFG_MDIO1) {
1100                                 ASD(("<internal> <poll stop> "));
1101                                 happy_meal_poll_stop(hp, tregs);
1102                                 hp->paddr = TCV_PADDR_ETX;
1103                                 hp->tcvr_type = external;
1104                                 ASD(("<external>\n"));
1105                                 tconfig &= ~(TCV_CFG_PENABLE);
1106                                 tconfig |= TCV_CFG_PSELECT;
1107                                 hme_write32(hp, tregs + TCVR_CFG, tconfig);
1108                         }
1109                 } else {
1110                         if (hp->tcvr_type == external) {
1111                                 ASD(("<external> "));
1112                                 if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
1113                                         ASD(("<poll stop> "));
1114                                         happy_meal_poll_stop(hp, tregs);
1115                                         hp->paddr = TCV_PADDR_ITX;
1116                                         hp->tcvr_type = internal;
1117                                         ASD(("<internal>\n"));
1118                                         hme_write32(hp, tregs + TCVR_CFG,
1119                                                     hme_read32(hp, tregs + TCVR_CFG) &
1120                                                     ~(TCV_CFG_PSELECT));
1121                                 }
1122                                 ASD(("\n"));
1123                         } else {
1124                                 ASD(("<none>\n"));
1125                         }
1126                 }
1127         } else {
1128                 u32 reread = hme_read32(hp, tregs + TCVR_CFG);
1129 
1130                 /* Else we can just work off of the MDIO bits. */
1131                 ASD(("<not polling> "));
1132                 if (reread & TCV_CFG_MDIO1) {
1133                         hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1134                         hp->paddr = TCV_PADDR_ETX;
1135                         hp->tcvr_type = external;
1136                         ASD(("<external>\n"));
1137                 } else {
1138                         if (reread & TCV_CFG_MDIO0) {
1139                                 hme_write32(hp, tregs + TCVR_CFG,
1140                                             tconfig & ~(TCV_CFG_PSELECT));
1141                                 hp->paddr = TCV_PADDR_ITX;
1142                                 hp->tcvr_type = internal;
1143                                 ASD(("<internal>\n"));
1144                         } else {
1145                                 printk(KERN_ERR "happy meal: Transceiver and a coke please.");
1146                                 hp->tcvr_type = none; /* Grrr... */
1147                                 ASD(("<none>\n"));
1148                         }
1149                 }
1150         }
1151 }
1152 
1153 /* The receive ring buffers are a bit tricky to get right.  Here goes...
1154  *
1155  * The buffers we dma into must be 64 byte aligned.  So we use a special
1156  * alloc_skb() routine for the happy meal to allocate 64 bytes more than
1157  * we really need.
1158  *
1159  * We use skb_reserve() to align the data block we get in the skb.  We
1160  * also program the etxregs->cfg register to use an offset of 2.  This
1161  * imperical constant plus the ethernet header size will always leave
1162  * us with a nicely aligned ip header once we pass things up to the
1163  * protocol layers.
1164  *
1165  * The numbers work out to:
1166  *
1167  *         Max ethernet frame size         1518
1168  *         Ethernet header size              14
1169  *         Happy Meal base offset             2
1170  *
1171  * Say a skb data area is at 0xf001b010, and its size alloced is
1172  * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
1173  *
1174  * First our alloc_skb() routine aligns the data base to a 64 byte
1175  * boundary.  We now have 0xf001b040 as our skb data address.  We
1176  * plug this into the receive descriptor address.
1177  *
1178  * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
1179  * So now the data we will end up looking at starts at 0xf001b042.  When
1180  * the packet arrives, we will check out the size received and subtract
1181  * this from the skb->length.  Then we just pass the packet up to the
1182  * protocols as is, and allocate a new skb to replace this slot we have
1183  * just received from.
1184  *
1185  * The ethernet layer will strip the ether header from the front of the
1186  * skb we just sent to it, this leaves us with the ip header sitting
1187  * nicely aligned at 0xf001b050.  Also, for tcp and udp packets the
1188  * Happy Meal has even checksummed the tcp/udp data for us.  The 16
1189  * bit checksum is obtained from the low bits of the receive descriptor
1190  * flags, thus:
1191  *
1192  *      skb->csum = rxd->rx_flags & 0xffff;
1193  *      skb->ip_summed = CHECKSUM_COMPLETE;
1194  *
1195  * before sending off the skb to the protocols, and we are good as gold.
1196  */
1197 static void happy_meal_clean_rings(struct happy_meal *hp)
1198 {
1199         int i;
1200 
1201         for (i = 0; i < RX_RING_SIZE; i++) {
1202                 if (hp->rx_skbs[i] != NULL) {
1203                         struct sk_buff *skb = hp->rx_skbs[i];
1204                         struct happy_meal_rxd *rxd;
1205                         u32 dma_addr;
1206 
1207                         rxd = &hp->happy_block->happy_meal_rxd[i];
1208                         dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
1209                         dma_unmap_single(hp->dma_dev, dma_addr,
1210                                          RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
1211                         dev_kfree_skb_any(skb);
1212                         hp->rx_skbs[i] = NULL;
1213                 }
1214         }
1215 
1216         for (i = 0; i < TX_RING_SIZE; i++) {
1217                 if (hp->tx_skbs[i] != NULL) {
1218                         struct sk_buff *skb = hp->tx_skbs[i];
1219                         struct happy_meal_txd *txd;
1220                         u32 dma_addr;
1221                         int frag;
1222 
1223                         hp->tx_skbs[i] = NULL;
1224 
1225                         for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1226                                 txd = &hp->happy_block->happy_meal_txd[i];
1227                                 dma_addr = hme_read_desc32(hp, &txd->tx_addr);
1228                                 if (!frag)
1229                                         dma_unmap_single(hp->dma_dev, dma_addr,
1230                                                          (hme_read_desc32(hp, &txd->tx_flags)
1231                                                           & TXFLAG_SIZE),
1232                                                          DMA_TO_DEVICE);
1233                                 else
1234                                         dma_unmap_page(hp->dma_dev, dma_addr,
1235                                                          (hme_read_desc32(hp, &txd->tx_flags)
1236                                                           & TXFLAG_SIZE),
1237                                                          DMA_TO_DEVICE);
1238 
1239                                 if (frag != skb_shinfo(skb)->nr_frags)
1240                                         i++;
1241                         }
1242 
1243                         dev_kfree_skb_any(skb);
1244                 }
1245         }
1246 }
1247 
1248 /* hp->happy_lock must be held */
1249 static void happy_meal_init_rings(struct happy_meal *hp)
1250 {
1251         struct hmeal_init_block *hb = hp->happy_block;
1252         int i;
1253 
1254         HMD(("happy_meal_init_rings: counters to zero, "));
1255         hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
1256 
1257         /* Free any skippy bufs left around in the rings. */
1258         HMD(("clean, "));
1259         happy_meal_clean_rings(hp);
1260 
1261         /* Now get new skippy bufs for the receive ring. */
1262         HMD(("init rxring, "));
1263         for (i = 0; i < RX_RING_SIZE; i++) {
1264                 struct sk_buff *skb;
1265 
1266                 skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
1267                 if (!skb) {
1268                         hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
1269                         continue;
1270                 }
1271                 hp->rx_skbs[i] = skb;
1272 
1273                 /* Because we reserve afterwards. */
1274                 skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
1275                 hme_write_rxd(hp, &hb->happy_meal_rxd[i],
1276                               (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
1277                               dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
1278                                              DMA_FROM_DEVICE));
1279                 skb_reserve(skb, RX_OFFSET);
1280         }
1281 
1282         HMD(("init txring, "));
1283         for (i = 0; i < TX_RING_SIZE; i++)
1284                 hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
1285 
1286         HMD(("done\n"));
1287 }
1288 
1289 /* hp->happy_lock must be held */
1290 static void happy_meal_begin_auto_negotiation(struct happy_meal *hp,
1291                                               void __iomem *tregs,
1292                                               struct ethtool_cmd *ep)
1293 {
1294         int timeout;
1295 
1296         /* Read all of the registers we are interested in now. */
1297         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1298         hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1299         hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1300         hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1301 
1302         /* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
1303 
1304         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1305         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1306                 /* Advertise everything we can support. */
1307                 if (hp->sw_bmsr & BMSR_10HALF)
1308                         hp->sw_advertise |= (ADVERTISE_10HALF);
1309                 else
1310                         hp->sw_advertise &= ~(ADVERTISE_10HALF);
1311 
1312                 if (hp->sw_bmsr & BMSR_10FULL)
1313                         hp->sw_advertise |= (ADVERTISE_10FULL);
1314                 else
1315                         hp->sw_advertise &= ~(ADVERTISE_10FULL);
1316                 if (hp->sw_bmsr & BMSR_100HALF)
1317                         hp->sw_advertise |= (ADVERTISE_100HALF);
1318                 else
1319                         hp->sw_advertise &= ~(ADVERTISE_100HALF);
1320                 if (hp->sw_bmsr & BMSR_100FULL)
1321                         hp->sw_advertise |= (ADVERTISE_100FULL);
1322                 else
1323                         hp->sw_advertise &= ~(ADVERTISE_100FULL);
1324                 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1325 
1326                 /* XXX Currently no Happy Meal cards I know off support 100BaseT4,
1327                  * XXX and this is because the DP83840 does not support it, changes
1328                  * XXX would need to be made to the tx/rx logic in the driver as well
1329                  * XXX so I completely skip checking for it in the BMSR for now.
1330                  */
1331 
1332 #ifdef AUTO_SWITCH_DEBUG
1333                 ASD(("%s: Advertising [ ", hp->dev->name));
1334                 if (hp->sw_advertise & ADVERTISE_10HALF)
1335                         ASD(("10H "));
1336                 if (hp->sw_advertise & ADVERTISE_10FULL)
1337                         ASD(("10F "));
1338                 if (hp->sw_advertise & ADVERTISE_100HALF)
1339                         ASD(("100H "));
1340                 if (hp->sw_advertise & ADVERTISE_100FULL)
1341                         ASD(("100F "));
1342 #endif
1343 
1344                 /* Enable Auto-Negotiation, this is usually on already... */
1345                 hp->sw_bmcr |= BMCR_ANENABLE;
1346                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1347 
1348                 /* Restart it to make sure it is going. */
1349                 hp->sw_bmcr |= BMCR_ANRESTART;
1350                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1351 
1352                 /* BMCR_ANRESTART self clears when the process has begun. */
1353 
1354                 timeout = 64;  /* More than enough. */
1355                 while (--timeout) {
1356                         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1357                         if (!(hp->sw_bmcr & BMCR_ANRESTART))
1358                                 break; /* got it. */
1359                         udelay(10);
1360                 }
1361                 if (!timeout) {
1362                         printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
1363                                "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
1364                         printk(KERN_NOTICE "%s: Performing force link detection.\n",
1365                                hp->dev->name);
1366                         goto force_link;
1367                 } else {
1368                         hp->timer_state = arbwait;
1369                 }
1370         } else {
1371 force_link:
1372                 /* Force the link up, trying first a particular mode.
1373                  * Either we are here at the request of ethtool or
1374                  * because the Happy Meal would not start to autoneg.
1375                  */
1376 
1377                 /* Disable auto-negotiation in BMCR, enable the duplex and
1378                  * speed setting, init the timer state machine, and fire it off.
1379                  */
1380                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1381                         hp->sw_bmcr = BMCR_SPEED100;
1382                 } else {
1383                         if (ethtool_cmd_speed(ep) == SPEED_100)
1384                                 hp->sw_bmcr = BMCR_SPEED100;
1385                         else
1386                                 hp->sw_bmcr = 0;
1387                         if (ep->duplex == DUPLEX_FULL)
1388                                 hp->sw_bmcr |= BMCR_FULLDPLX;
1389                 }
1390                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1391 
1392                 if (!is_lucent_phy(hp)) {
1393                         /* OK, seems we need do disable the transceiver for the first
1394                          * tick to make sure we get an accurate link state at the
1395                          * second tick.
1396                          */
1397                         hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
1398                                                                DP83840_CSCONFIG);
1399                         hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
1400                         happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
1401                                               hp->sw_csconfig);
1402                 }
1403                 hp->timer_state = ltrywait;
1404         }
1405 
1406         hp->timer_ticks = 0;
1407         hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
1408         hp->happy_timer.data = (unsigned long) hp;
1409         hp->happy_timer.function = happy_meal_timer;
1410         add_timer(&hp->happy_timer);
1411 }
1412 
1413 /* hp->happy_lock must be held */
1414 static int happy_meal_init(struct happy_meal *hp)
1415 {
1416         void __iomem *gregs        = hp->gregs;
1417         void __iomem *etxregs      = hp->etxregs;
1418         void __iomem *erxregs      = hp->erxregs;
1419         void __iomem *bregs        = hp->bigmacregs;
1420         void __iomem *tregs        = hp->tcvregs;
1421         u32 regtmp, rxcfg;
1422         unsigned char *e = &hp->dev->dev_addr[0];
1423 
1424         /* If auto-negotiation timer is running, kill it. */
1425         del_timer(&hp->happy_timer);
1426 
1427         HMD(("happy_meal_init: happy_flags[%08x] ",
1428              hp->happy_flags));
1429         if (!(hp->happy_flags & HFLAG_INIT)) {
1430                 HMD(("set HFLAG_INIT, "));
1431                 hp->happy_flags |= HFLAG_INIT;
1432                 happy_meal_get_counters(hp, bregs);
1433         }
1434 
1435         /* Stop polling. */
1436         HMD(("to happy_meal_poll_stop\n"));
1437         happy_meal_poll_stop(hp, tregs);
1438 
1439         /* Stop transmitter and receiver. */
1440         HMD(("happy_meal_init: to happy_meal_stop\n"));
1441         happy_meal_stop(hp, gregs);
1442 
1443         /* Alloc and reset the tx/rx descriptor chains. */
1444         HMD(("happy_meal_init: to happy_meal_init_rings\n"));
1445         happy_meal_init_rings(hp);
1446 
1447         /* Shut up the MIF. */
1448         HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
1449              hme_read32(hp, tregs + TCVR_IMASK)));
1450         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1451 
1452         /* See if we can enable the MIF frame on this card to speak to the DP83840. */
1453         if (hp->happy_flags & HFLAG_FENABLE) {
1454                 HMD(("use frame old[%08x], ",
1455                      hme_read32(hp, tregs + TCVR_CFG)));
1456                 hme_write32(hp, tregs + TCVR_CFG,
1457                             hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1458         } else {
1459                 HMD(("use bitbang old[%08x], ",
1460                      hme_read32(hp, tregs + TCVR_CFG)));
1461                 hme_write32(hp, tregs + TCVR_CFG,
1462                             hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1463         }
1464 
1465         /* Check the state of the transceiver. */
1466         HMD(("to happy_meal_transceiver_check\n"));
1467         happy_meal_transceiver_check(hp, tregs);
1468 
1469         /* Put the Big Mac into a sane state. */
1470         HMD(("happy_meal_init: "));
1471         switch(hp->tcvr_type) {
1472         case none:
1473                 /* Cannot operate if we don't know the transceiver type! */
1474                 HMD(("AAIEEE no transceiver type, EAGAIN"));
1475                 return -EAGAIN;
1476 
1477         case internal:
1478                 /* Using the MII buffers. */
1479                 HMD(("internal, using MII, "));
1480                 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1481                 break;
1482 
1483         case external:
1484                 /* Not using the MII, disable it. */
1485                 HMD(("external, disable MII, "));
1486                 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1487                 break;
1488         }
1489 
1490         if (happy_meal_tcvr_reset(hp, tregs))
1491                 return -EAGAIN;
1492 
1493         /* Reset the Happy Meal Big Mac transceiver and the receiver. */
1494         HMD(("tx/rx reset, "));
1495         happy_meal_tx_reset(hp, bregs);
1496         happy_meal_rx_reset(hp, bregs);
1497 
1498         /* Set jam size and inter-packet gaps to reasonable defaults. */
1499         HMD(("jsize/ipg1/ipg2, "));
1500         hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
1501         hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
1502         hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
1503 
1504         /* Load up the MAC address and random seed. */
1505         HMD(("rseed/macaddr, "));
1506 
1507         /* The docs recommend to use the 10LSB of our MAC here. */
1508         hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
1509 
1510         hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
1511         hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
1512         hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
1513 
1514         HMD(("htable, "));
1515         if ((hp->dev->flags & IFF_ALLMULTI) ||
1516             (netdev_mc_count(hp->dev) > 64)) {
1517                 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
1518                 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
1519                 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
1520                 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
1521         } else if ((hp->dev->flags & IFF_PROMISC) == 0) {
1522                 u16 hash_table[4];
1523                 struct netdev_hw_addr *ha;
1524                 u32 crc;
1525 
1526                 memset(hash_table, 0, sizeof(hash_table));
1527                 netdev_for_each_mc_addr(ha, hp->dev) {
1528                         crc = ether_crc_le(6, ha->addr);
1529                         crc >>= 26;
1530                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1531                 }
1532                 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
1533                 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
1534                 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
1535                 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
1536         } else {
1537                 hme_write32(hp, bregs + BMAC_HTABLE3, 0);
1538                 hme_write32(hp, bregs + BMAC_HTABLE2, 0);
1539                 hme_write32(hp, bregs + BMAC_HTABLE1, 0);
1540                 hme_write32(hp, bregs + BMAC_HTABLE0, 0);
1541         }
1542 
1543         /* Set the RX and TX ring ptrs. */
1544         HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
1545              ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
1546              ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
1547         hme_write32(hp, erxregs + ERX_RING,
1548                     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
1549         hme_write32(hp, etxregs + ETX_RING,
1550                     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
1551 
1552         /* Parity issues in the ERX unit of some HME revisions can cause some
1553          * registers to not be written unless their parity is even.  Detect such
1554          * lost writes and simply rewrite with a low bit set (which will be ignored
1555          * since the rxring needs to be 2K aligned).
1556          */
1557         if (hme_read32(hp, erxregs + ERX_RING) !=
1558             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
1559                 hme_write32(hp, erxregs + ERX_RING,
1560                             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
1561                             | 0x4);
1562 
1563         /* Set the supported burst sizes. */
1564         HMD(("happy_meal_init: old[%08x] bursts<",
1565              hme_read32(hp, gregs + GREG_CFG)));
1566 
1567 #ifndef CONFIG_SPARC
1568         /* It is always PCI and can handle 64byte bursts. */
1569         hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
1570 #else
1571         if ((hp->happy_bursts & DMA_BURST64) &&
1572             ((hp->happy_flags & HFLAG_PCI) != 0
1573 #ifdef CONFIG_SBUS
1574              || sbus_can_burst64()
1575 #endif
1576              || 0)) {
1577                 u32 gcfg = GREG_CFG_BURST64;
1578 
1579                 /* I have no idea if I should set the extended
1580                  * transfer mode bit for Cheerio, so for now I
1581                  * do not.  -DaveM
1582                  */
1583 #ifdef CONFIG_SBUS
1584                 if ((hp->happy_flags & HFLAG_PCI) == 0) {
1585                         struct platform_device *op = hp->happy_dev;
1586                         if (sbus_can_dma_64bit()) {
1587                                 sbus_set_sbus64(&op->dev,
1588                                                 hp->happy_bursts);
1589                                 gcfg |= GREG_CFG_64BIT;
1590                         }
1591                 }
1592 #endif
1593 
1594                 HMD(("64>"));
1595                 hme_write32(hp, gregs + GREG_CFG, gcfg);
1596         } else if (hp->happy_bursts & DMA_BURST32) {
1597                 HMD(("32>"));
1598                 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
1599         } else if (hp->happy_bursts & DMA_BURST16) {
1600                 HMD(("16>"));
1601                 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
1602         } else {
1603                 HMD(("XXX>"));
1604                 hme_write32(hp, gregs + GREG_CFG, 0);
1605         }
1606 #endif /* CONFIG_SPARC */
1607 
1608         /* Turn off interrupts we do not want to hear. */
1609         HMD((", enable global interrupts, "));
1610         hme_write32(hp, gregs + GREG_IMASK,
1611                     (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
1612                      GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
1613 
1614         /* Set the transmit ring buffer size. */
1615         HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
1616              hme_read32(hp, etxregs + ETX_RSIZE)));
1617         hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
1618 
1619         /* Enable transmitter DVMA. */
1620         HMD(("tx dma enable old[%08x], ",
1621              hme_read32(hp, etxregs + ETX_CFG)));
1622         hme_write32(hp, etxregs + ETX_CFG,
1623                     hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
1624 
1625         /* This chip really rots, for the receiver sometimes when you
1626          * write to its control registers not all the bits get there
1627          * properly.  I cannot think of a sane way to provide complete
1628          * coverage for this hardware bug yet.
1629          */
1630         HMD(("erx regs bug old[%08x]\n",
1631              hme_read32(hp, erxregs + ERX_CFG)));
1632         hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1633         regtmp = hme_read32(hp, erxregs + ERX_CFG);
1634         hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1635         if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
1636                 printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
1637                 printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
1638                        ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
1639                 /* XXX Should return failure here... */
1640         }
1641 
1642         /* Enable Big Mac hash table filter. */
1643         HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
1644              hme_read32(hp, bregs + BMAC_RXCFG)));
1645         rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
1646         if (hp->dev->flags & IFF_PROMISC)
1647                 rxcfg |= BIGMAC_RXCFG_PMISC;
1648         hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
1649 
1650         /* Let the bits settle in the chip. */
1651         udelay(10);
1652 
1653         /* Ok, configure the Big Mac transmitter. */
1654         HMD(("BIGMAC init, "));
1655         regtmp = 0;
1656         if (hp->happy_flags & HFLAG_FULL)
1657                 regtmp |= BIGMAC_TXCFG_FULLDPLX;
1658 
1659         /* Don't turn on the "don't give up" bit for now.  It could cause hme
1660          * to deadlock with the PHY if a Jabber occurs.
1661          */
1662         hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
1663 
1664         /* Give up after 16 TX attempts. */
1665         hme_write32(hp, bregs + BMAC_ALIMIT, 16);
1666 
1667         /* Enable the output drivers no matter what. */
1668         regtmp = BIGMAC_XCFG_ODENABLE;
1669 
1670         /* If card can do lance mode, enable it. */
1671         if (hp->happy_flags & HFLAG_LANCE)
1672                 regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
1673 
1674         /* Disable the MII buffers if using external transceiver. */
1675         if (hp->tcvr_type == external)
1676                 regtmp |= BIGMAC_XCFG_MIIDISAB;
1677 
1678         HMD(("XIF config old[%08x], ",
1679              hme_read32(hp, bregs + BMAC_XIFCFG)));
1680         hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
1681 
1682         /* Start things up. */
1683         HMD(("tx old[%08x] and rx [%08x] ON!\n",
1684              hme_read32(hp, bregs + BMAC_TXCFG),
1685              hme_read32(hp, bregs + BMAC_RXCFG)));
1686 
1687         /* Set larger TX/RX size to allow for 802.1q */
1688         hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
1689         hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
1690 
1691         hme_write32(hp, bregs + BMAC_TXCFG,
1692                     hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
1693         hme_write32(hp, bregs + BMAC_RXCFG,
1694                     hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
1695 
1696         /* Get the autonegotiation started, and the watch timer ticking. */
1697         happy_meal_begin_auto_negotiation(hp, tregs, NULL);
1698 
1699         /* Success. */
1700         return 0;
1701 }
1702 
1703 /* hp->happy_lock must be held */
1704 static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
1705 {
1706         void __iomem *tregs     = hp->tcvregs;
1707         void __iomem *bregs     = hp->bigmacregs;
1708         void __iomem *gregs     = hp->gregs;
1709 
1710         happy_meal_stop(hp, gregs);
1711         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1712         if (hp->happy_flags & HFLAG_FENABLE)
1713                 hme_write32(hp, tregs + TCVR_CFG,
1714                             hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1715         else
1716                 hme_write32(hp, tregs + TCVR_CFG,
1717                             hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1718         happy_meal_transceiver_check(hp, tregs);
1719         switch(hp->tcvr_type) {
1720         case none:
1721                 return;
1722         case internal:
1723                 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1724                 break;
1725         case external:
1726                 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1727                 break;
1728         }
1729         if (happy_meal_tcvr_reset(hp, tregs))
1730                 return;
1731 
1732         /* Latch PHY registers as of now. */
1733         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1734         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1735 
1736         /* Advertise everything we can support. */
1737         if (hp->sw_bmsr & BMSR_10HALF)
1738                 hp->sw_advertise |= (ADVERTISE_10HALF);
1739         else
1740                 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1741 
1742         if (hp->sw_bmsr & BMSR_10FULL)
1743                 hp->sw_advertise |= (ADVERTISE_10FULL);
1744         else
1745                 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1746         if (hp->sw_bmsr & BMSR_100HALF)
1747                 hp->sw_advertise |= (ADVERTISE_100HALF);
1748         else
1749                 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1750         if (hp->sw_bmsr & BMSR_100FULL)
1751                 hp->sw_advertise |= (ADVERTISE_100FULL);
1752         else
1753                 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1754 
1755         /* Update the PHY advertisement register. */
1756         happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1757 }
1758 
1759 /* Once status is latched (by happy_meal_interrupt) it is cleared by
1760  * the hardware, so we cannot re-read it and get a correct value.
1761  *
1762  * hp->happy_lock must be held
1763  */
1764 static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
1765 {
1766         int reset = 0;
1767 
1768         /* Only print messages for non-counter related interrupts. */
1769         if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
1770                       GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
1771                       GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
1772                       GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
1773                       GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
1774                       GREG_STAT_SLVPERR))
1775                 printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
1776                        hp->dev->name, status);
1777 
1778         if (status & GREG_STAT_RFIFOVF) {
1779                 /* Receive FIFO overflow is harmless and the hardware will take
1780                    care of it, just some packets are lost. Who cares. */
1781                 printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
1782         }
1783 
1784         if (status & GREG_STAT_STSTERR) {
1785                 /* BigMAC SQE link test failed. */
1786                 printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
1787                 reset = 1;
1788         }
1789 
1790         if (status & GREG_STAT_TFIFO_UND) {
1791                 /* Transmit FIFO underrun, again DMA error likely. */
1792                 printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
1793                        hp->dev->name);
1794                 reset = 1;
1795         }
1796 
1797         if (status & GREG_STAT_MAXPKTERR) {
1798                 /* Driver error, tried to transmit something larger
1799                  * than ethernet max mtu.
1800                  */
1801                 printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
1802                 reset = 1;
1803         }
1804 
1805         if (status & GREG_STAT_NORXD) {
1806                 /* This is harmless, it just means the system is
1807                  * quite loaded and the incoming packet rate was
1808                  * faster than the interrupt handler could keep up
1809                  * with.
1810                  */
1811                 printk(KERN_INFO "%s: Happy Meal out of receive "
1812                        "descriptors, packet dropped.\n",
1813                        hp->dev->name);
1814         }
1815 
1816         if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
1817                 /* All sorts of DMA receive errors. */
1818                 printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
1819                 if (status & GREG_STAT_RXERR)
1820                         printk("GenericError ");
1821                 if (status & GREG_STAT_RXPERR)
1822                         printk("ParityError ");
1823                 if (status & GREG_STAT_RXTERR)
1824                         printk("RxTagBotch ");
1825                 printk("]\n");
1826                 reset = 1;
1827         }
1828 
1829         if (status & GREG_STAT_EOPERR) {
1830                 /* Driver bug, didn't set EOP bit in tx descriptor given
1831                  * to the happy meal.
1832                  */
1833                 printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
1834                        hp->dev->name);
1835                 reset = 1;
1836         }
1837 
1838         if (status & GREG_STAT_MIFIRQ) {
1839                 /* MIF signalled an interrupt, were we polling it? */
1840                 printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
1841         }
1842 
1843         if (status &
1844             (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
1845                 /* All sorts of transmit DMA errors. */
1846                 printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
1847                 if (status & GREG_STAT_TXEACK)
1848                         printk("GenericError ");
1849                 if (status & GREG_STAT_TXLERR)
1850                         printk("LateError ");
1851                 if (status & GREG_STAT_TXPERR)
1852                         printk("ParityErro ");
1853                 if (status & GREG_STAT_TXTERR)
1854                         printk("TagBotch ");
1855                 printk("]\n");
1856                 reset = 1;
1857         }
1858 
1859         if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
1860                 /* Bus or parity error when cpu accessed happy meal registers
1861                  * or it's internal FIFO's.  Should never see this.
1862                  */
1863                 printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
1864                        hp->dev->name,
1865                        (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
1866                 reset = 1;
1867         }
1868 
1869         if (reset) {
1870                 printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
1871                 happy_meal_init(hp);
1872                 return 1;
1873         }
1874         return 0;
1875 }
1876 
1877 /* hp->happy_lock must be held */
1878 static void happy_meal_mif_interrupt(struct happy_meal *hp)
1879 {
1880         void __iomem *tregs = hp->tcvregs;
1881 
1882         printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
1883         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1884         hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
1885 
1886         /* Use the fastest transmission protocol possible. */
1887         if (hp->sw_lpa & LPA_100FULL) {
1888                 printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
1889                 hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
1890         } else if (hp->sw_lpa & LPA_100HALF) {
1891                 printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
1892                 hp->sw_bmcr |= BMCR_SPEED100;
1893         } else if (hp->sw_lpa & LPA_10FULL) {
1894                 printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
1895                 hp->sw_bmcr |= BMCR_FULLDPLX;
1896         } else {
1897                 printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
1898         }
1899         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1900 
1901         /* Finally stop polling and shut up the MIF. */
1902         happy_meal_poll_stop(hp, tregs);
1903 }
1904 
1905 #ifdef TXDEBUG
1906 #define TXD(x) printk x
1907 #else
1908 #define TXD(x)
1909 #endif
1910 
1911 /* hp->happy_lock must be held */
1912 static void happy_meal_tx(struct happy_meal *hp)
1913 {
1914         struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
1915         struct happy_meal_txd *this;
1916         struct net_device *dev = hp->dev;
1917         int elem;
1918 
1919         elem = hp->tx_old;
1920         TXD(("TX<"));
1921         while (elem != hp->tx_new) {
1922                 struct sk_buff *skb;
1923                 u32 flags, dma_addr, dma_len;
1924                 int frag;
1925 
1926                 TXD(("[%d]", elem));
1927                 this = &txbase[elem];
1928                 flags = hme_read_desc32(hp, &this->tx_flags);
1929                 if (flags & TXFLAG_OWN)
1930                         break;
1931                 skb = hp->tx_skbs[elem];
1932                 if (skb_shinfo(skb)->nr_frags) {
1933                         int last;
1934 
1935                         last = elem + skb_shinfo(skb)->nr_frags;
1936                         last &= (TX_RING_SIZE - 1);
1937                         flags = hme_read_desc32(hp, &txbase[last].tx_flags);
1938                         if (flags & TXFLAG_OWN)
1939                                 break;
1940                 }
1941                 hp->tx_skbs[elem] = NULL;
1942                 hp->net_stats.tx_bytes += skb->len;
1943 
1944                 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1945                         dma_addr = hme_read_desc32(hp, &this->tx_addr);
1946                         dma_len = hme_read_desc32(hp, &this->tx_flags);
1947 
1948                         dma_len &= TXFLAG_SIZE;
1949                         if (!frag)
1950                                 dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1951                         else
1952                                 dma_unmap_page(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1953 
1954                         elem = NEXT_TX(elem);
1955                         this = &txbase[elem];
1956                 }
1957 
1958                 dev_kfree_skb_irq(skb);
1959                 hp->net_stats.tx_packets++;
1960         }
1961         hp->tx_old = elem;
1962         TXD((">"));
1963 
1964         if (netif_queue_stopped(dev) &&
1965             TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
1966                 netif_wake_queue(dev);
1967 }
1968 
1969 #ifdef RXDEBUG
1970 #define RXD(x) printk x
1971 #else
1972 #define RXD(x)
1973 #endif
1974 
1975 /* Originally I used to handle the allocation failure by just giving back just
1976  * that one ring buffer to the happy meal.  Problem is that usually when that
1977  * condition is triggered, the happy meal expects you to do something reasonable
1978  * with all of the packets it has DMA'd in.  So now I just drop the entire
1979  * ring when we cannot get a new skb and give them all back to the happy meal,
1980  * maybe things will be "happier" now.
1981  *
1982  * hp->happy_lock must be held
1983  */
1984 static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
1985 {
1986         struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
1987         struct happy_meal_rxd *this;
1988         int elem = hp->rx_new, drops = 0;
1989         u32 flags;
1990 
1991         RXD(("RX<"));
1992         this = &rxbase[elem];
1993         while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
1994                 struct sk_buff *skb;
1995                 int len = flags >> 16;
1996                 u16 csum = flags & RXFLAG_CSUM;
1997                 u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
1998 
1999                 RXD(("[%d ", elem));
2000 
2001                 /* Check for errors. */
2002                 if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
2003                         RXD(("ERR(%08x)]", flags));
2004                         hp->net_stats.rx_errors++;
2005                         if (len < ETH_ZLEN)
2006                                 hp->net_stats.rx_length_errors++;
2007                         if (len & (RXFLAG_OVERFLOW >> 16)) {
2008                                 hp->net_stats.rx_over_errors++;
2009                                 hp->net_stats.rx_fifo_errors++;
2010                         }
2011 
2012                         /* Return it to the Happy meal. */
2013         drop_it:
2014                         hp->net_stats.rx_dropped++;
2015                         hme_write_rxd(hp, this,
2016                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2017                                       dma_addr);
2018                         goto next;
2019                 }
2020                 skb = hp->rx_skbs[elem];
2021                 if (len > RX_COPY_THRESHOLD) {
2022                         struct sk_buff *new_skb;
2023 
2024                         /* Now refill the entry, if we can. */
2025                         new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
2026                         if (new_skb == NULL) {
2027                                 drops++;
2028                                 goto drop_it;
2029                         }
2030                         dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
2031                         hp->rx_skbs[elem] = new_skb;
2032                         skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
2033                         hme_write_rxd(hp, this,
2034                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2035                                       dma_map_single(hp->dma_dev, new_skb->data, RX_BUF_ALLOC_SIZE,
2036                                                      DMA_FROM_DEVICE));
2037                         skb_reserve(new_skb, RX_OFFSET);
2038 
2039                         /* Trim the original skb for the netif. */
2040                         skb_trim(skb, len);
2041                 } else {
2042                         struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2);
2043 
2044                         if (copy_skb == NULL) {
2045                                 drops++;
2046                                 goto drop_it;
2047                         }
2048 
2049                         skb_reserve(copy_skb, 2);
2050                         skb_put(copy_skb, len);
2051                         dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2052                         skb_copy_from_linear_data(skb, copy_skb->data, len);
2053                         dma_sync_single_for_device(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2054                         /* Reuse original ring buffer. */
2055                         hme_write_rxd(hp, this,
2056                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2057                                       dma_addr);
2058 
2059                         skb = copy_skb;
2060                 }
2061 
2062                 /* This card is _fucking_ hot... */
2063                 skb->csum = csum_unfold(~(__force __sum16)htons(csum));
2064                 skb->ip_summed = CHECKSUM_COMPLETE;
2065 
2066                 RXD(("len=%d csum=%4x]", len, csum));
2067                 skb->protocol = eth_type_trans(skb, dev);
2068                 netif_rx(skb);
2069 
2070                 hp->net_stats.rx_packets++;
2071                 hp->net_stats.rx_bytes += len;
2072         next:
2073                 elem = NEXT_RX(elem);
2074                 this = &rxbase[elem];
2075         }
2076         hp->rx_new = elem;
2077         if (drops)
2078                 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
2079         RXD((">"));
2080 }
2081 
2082 static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
2083 {
2084         struct net_device *dev = dev_id;
2085         struct happy_meal *hp  = netdev_priv(dev);
2086         u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
2087 
2088         HMD(("happy_meal_interrupt: status=%08x ", happy_status));
2089 
2090         spin_lock(&hp->happy_lock);
2091 
2092         if (happy_status & GREG_STAT_ERRORS) {
2093                 HMD(("ERRORS "));
2094                 if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
2095                         goto out;
2096         }
2097 
2098         if (happy_status & GREG_STAT_MIFIRQ) {
2099                 HMD(("MIFIRQ "));
2100                 happy_meal_mif_interrupt(hp);
2101         }
2102 
2103         if (happy_status & GREG_STAT_TXALL) {
2104                 HMD(("TXALL "));
2105                 happy_meal_tx(hp);
2106         }
2107 
2108         if (happy_status & GREG_STAT_RXTOHOST) {
2109                 HMD(("RXTOHOST "));
2110                 happy_meal_rx(hp, dev);
2111         }
2112 
2113         HMD(("done\n"));
2114 out:
2115         spin_unlock(&hp->happy_lock);
2116 
2117         return IRQ_HANDLED;
2118 }
2119 
2120 #ifdef CONFIG_SBUS
2121 static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
2122 {
2123         struct quattro *qp = (struct quattro *) cookie;
2124         int i;
2125 
2126         for (i = 0; i < 4; i++) {
2127                 struct net_device *dev = qp->happy_meals[i];
2128                 struct happy_meal *hp  = netdev_priv(dev);
2129                 u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
2130 
2131                 HMD(("quattro_interrupt: status=%08x ", happy_status));
2132 
2133                 if (!(happy_status & (GREG_STAT_ERRORS |
2134                                       GREG_STAT_MIFIRQ |
2135                                       GREG_STAT_TXALL |
2136                                       GREG_STAT_RXTOHOST)))
2137                         continue;
2138 
2139                 spin_lock(&hp->happy_lock);
2140 
2141                 if (happy_status & GREG_STAT_ERRORS) {
2142                         HMD(("ERRORS "));
2143                         if (happy_meal_is_not_so_happy(hp, happy_status))
2144                                 goto next;
2145                 }
2146 
2147                 if (happy_status & GREG_STAT_MIFIRQ) {
2148                         HMD(("MIFIRQ "));
2149                         happy_meal_mif_interrupt(hp);
2150                 }
2151 
2152                 if (happy_status & GREG_STAT_TXALL) {
2153                         HMD(("TXALL "));
2154                         happy_meal_tx(hp);
2155                 }
2156 
2157                 if (happy_status & GREG_STAT_RXTOHOST) {
2158                         HMD(("RXTOHOST "));
2159                         happy_meal_rx(hp, dev);
2160                 }
2161 
2162         next:
2163                 spin_unlock(&hp->happy_lock);
2164         }
2165         HMD(("done\n"));
2166 
2167         return IRQ_HANDLED;
2168 }
2169 #endif
2170 
2171 static int happy_meal_open(struct net_device *dev)
2172 {
2173         struct happy_meal *hp = netdev_priv(dev);
2174         int res;
2175 
2176         HMD(("happy_meal_open: "));
2177 
2178         /* On SBUS Quattro QFE cards, all hme interrupts are concentrated
2179          * into a single source which we register handling at probe time.
2180          */
2181         if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
2182                 res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
2183                                   dev->name, dev);
2184                 if (res) {
2185                         HMD(("EAGAIN\n"));
2186                         printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
2187                                hp->irq);
2188 
2189                         return -EAGAIN;
2190                 }
2191         }
2192 
2193         HMD(("to happy_meal_init\n"));
2194 
2195         spin_lock_irq(&hp->happy_lock);
2196         res = happy_meal_init(hp);
2197         spin_unlock_irq(&hp->happy_lock);
2198 
2199         if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
2200                 free_irq(hp->irq, dev);
2201         return res;
2202 }
2203 
2204 static int happy_meal_close(struct net_device *dev)
2205 {
2206         struct happy_meal *hp = netdev_priv(dev);
2207 
2208         spin_lock_irq(&hp->happy_lock);
2209         happy_meal_stop(hp, hp->gregs);
2210         happy_meal_clean_rings(hp);
2211 
2212         /* If auto-negotiation timer is running, kill it. */
2213         del_timer(&hp->happy_timer);
2214 
2215         spin_unlock_irq(&hp->happy_lock);
2216 
2217         /* On Quattro QFE cards, all hme interrupts are concentrated
2218          * into a single source which we register handling at probe
2219          * time and never unregister.
2220          */
2221         if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
2222                 free_irq(hp->irq, dev);
2223 
2224         return 0;
2225 }
2226 
2227 #ifdef SXDEBUG
2228 #define SXD(x) printk x
2229 #else
2230 #define SXD(x)
2231 #endif
2232 
2233 static void happy_meal_tx_timeout(struct net_device *dev)
2234 {
2235         struct happy_meal *hp = netdev_priv(dev);
2236 
2237         printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
2238         tx_dump_log();
2239         printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
2240                 hme_read32(hp, hp->gregs + GREG_STAT),
2241                 hme_read32(hp, hp->etxregs + ETX_CFG),
2242                 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
2243 
2244         spin_lock_irq(&hp->happy_lock);
2245         happy_meal_init(hp);
2246         spin_unlock_irq(&hp->happy_lock);
2247 
2248         netif_wake_queue(dev);
2249 }
2250 
2251 static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
2252                                          struct net_device *dev)
2253 {
2254         struct happy_meal *hp = netdev_priv(dev);
2255         int entry;
2256         u32 tx_flags;
2257 
2258         tx_flags = TXFLAG_OWN;
2259         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2260                 const u32 csum_start_off = skb_checksum_start_offset(skb);
2261                 const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
2262 
2263                 tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
2264                             ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
2265                             ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
2266         }
2267 
2268         spin_lock_irq(&hp->happy_lock);
2269 
2270         if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
2271                 netif_stop_queue(dev);
2272                 spin_unlock_irq(&hp->happy_lock);
2273                 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
2274                        dev->name);
2275                 return NETDEV_TX_BUSY;
2276         }
2277 
2278         entry = hp->tx_new;
2279         SXD(("SX<l[%d]e[%d]>", len, entry));
2280         hp->tx_skbs[entry] = skb;
2281 
2282         if (skb_shinfo(skb)->nr_frags == 0) {
2283                 u32 mapping, len;
2284 
2285                 len = skb->len;
2286                 mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
2287                 tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
2288                 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2289                               (tx_flags | (len & TXFLAG_SIZE)),
2290                               mapping);
2291                 entry = NEXT_TX(entry);
2292         } else {
2293                 u32 first_len, first_mapping;
2294                 int frag, first_entry = entry;
2295 
2296                 /* We must give this initial chunk to the device last.
2297                  * Otherwise we could race with the device.
2298                  */
2299                 first_len = skb_headlen(skb);
2300                 first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
2301                                                DMA_TO_DEVICE);
2302                 entry = NEXT_TX(entry);
2303 
2304                 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
2305                         const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
2306                         u32 len, mapping, this_txflags;
2307 
2308                         len = skb_frag_size(this_frag);
2309                         mapping = skb_frag_dma_map(hp->dma_dev, this_frag,
2310                                                    0, len, DMA_TO_DEVICE);
2311                         this_txflags = tx_flags;
2312                         if (frag == skb_shinfo(skb)->nr_frags - 1)
2313                                 this_txflags |= TXFLAG_EOP;
2314                         hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2315                                       (this_txflags | (len & TXFLAG_SIZE)),
2316                                       mapping);
2317                         entry = NEXT_TX(entry);
2318                 }
2319                 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
2320                               (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
2321                               first_mapping);
2322         }
2323 
2324         hp->tx_new = entry;
2325 
2326         if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
2327                 netif_stop_queue(dev);
2328 
2329         /* Get it going. */
2330         hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
2331 
2332         spin_unlock_irq(&hp->happy_lock);
2333 
2334         tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
2335         return NETDEV_TX_OK;
2336 }
2337 
2338 static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
2339 {
2340         struct happy_meal *hp = netdev_priv(dev);
2341 
2342         spin_lock_irq(&hp->happy_lock);
2343         happy_meal_get_counters(hp, hp->bigmacregs);
2344         spin_unlock_irq(&hp->happy_lock);
2345 
2346         return &hp->net_stats;
2347 }
2348 
2349 static void happy_meal_set_multicast(struct net_device *dev)
2350 {
2351         struct happy_meal *hp = netdev_priv(dev);
2352         void __iomem *bregs = hp->bigmacregs;
2353         struct netdev_hw_addr *ha;
2354         u32 crc;
2355 
2356         spin_lock_irq(&hp->happy_lock);
2357 
2358         if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
2359                 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
2360                 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
2361                 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
2362                 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
2363         } else if (dev->flags & IFF_PROMISC) {
2364                 hme_write32(hp, bregs + BMAC_RXCFG,
2365                             hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
2366         } else {
2367                 u16 hash_table[4];
2368 
2369                 memset(hash_table, 0, sizeof(hash_table));
2370                 netdev_for_each_mc_addr(ha, dev) {
2371                         crc = ether_crc_le(6, ha->addr);
2372                         crc >>= 26;
2373                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
2374                 }
2375                 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
2376                 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
2377                 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
2378                 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
2379         }
2380 
2381         spin_unlock_irq(&hp->happy_lock);
2382 }
2383 
2384 /* Ethtool support... */
2385 static int hme_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2386 {
2387         struct happy_meal *hp = netdev_priv(dev);
2388         u32 speed;
2389 
2390         cmd->supported =
2391                 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2392                  SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2393                  SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
2394 
2395         /* XXX hardcoded stuff for now */
2396         cmd->port = PORT_TP; /* XXX no MII support */
2397         cmd->transceiver = XCVR_INTERNAL; /* XXX no external xcvr support */
2398         cmd->phy_address = 0; /* XXX fixed PHYAD */
2399 
2400         /* Record PHY settings. */
2401         spin_lock_irq(&hp->happy_lock);
2402         hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2403         hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
2404         spin_unlock_irq(&hp->happy_lock);
2405 
2406         if (hp->sw_bmcr & BMCR_ANENABLE) {
2407                 cmd->autoneg = AUTONEG_ENABLE;
2408                 speed = ((hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
2409                          SPEED_100 : SPEED_10);
2410                 if (speed == SPEED_100)
2411                         cmd->duplex =
2412                                 (hp->sw_lpa & (LPA_100FULL)) ?
2413                                 DUPLEX_FULL : DUPLEX_HALF;
2414                 else
2415                         cmd->duplex =
2416                                 (hp->sw_lpa & (LPA_10FULL)) ?
2417                                 DUPLEX_FULL : DUPLEX_HALF;
2418         } else {
2419                 cmd->autoneg = AUTONEG_DISABLE;
2420                 speed = (hp->sw_bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
2421                 cmd->duplex =
2422                         (hp->sw_bmcr & BMCR_FULLDPLX) ?
2423                         DUPLEX_FULL : DUPLEX_HALF;
2424         }
2425         ethtool_cmd_speed_set(cmd, speed);
2426         return 0;
2427 }
2428 
2429 static int hme_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2430 {
2431         struct happy_meal *hp = netdev_priv(dev);
2432 
2433         /* Verify the settings we care about. */
2434         if (cmd->autoneg != AUTONEG_ENABLE &&
2435             cmd->autoneg != AUTONEG_DISABLE)
2436                 return -EINVAL;
2437         if (cmd->autoneg == AUTONEG_DISABLE &&
2438             ((ethtool_cmd_speed(cmd) != SPEED_100 &&
2439               ethtool_cmd_speed(cmd) != SPEED_10) ||
2440              (cmd->duplex != DUPLEX_HALF &&
2441               cmd->duplex != DUPLEX_FULL)))
2442                 return -EINVAL;
2443 
2444         /* Ok, do it to it. */
2445         spin_lock_irq(&hp->happy_lock);
2446         del_timer(&hp->happy_timer);
2447         happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
2448         spin_unlock_irq(&hp->happy_lock);
2449 
2450         return 0;
2451 }
2452 
2453 static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2454 {
2455         struct happy_meal *hp = netdev_priv(dev);
2456 
2457         strlcpy(info->driver, "sunhme", sizeof(info->driver));
2458         strlcpy(info->version, "2.02", sizeof(info->version));
2459         if (hp->happy_flags & HFLAG_PCI) {
2460                 struct pci_dev *pdev = hp->happy_dev;
2461                 strlcpy(info->bus_info, pci_name(pdev), sizeof(info->bus_info));
2462         }
2463 #ifdef CONFIG_SBUS
2464         else {
2465                 const struct linux_prom_registers *regs;
2466                 struct platform_device *op = hp->happy_dev;
2467                 regs = of_get_property(op->dev.of_node, "regs", NULL);
2468                 if (regs)
2469                         snprintf(info->bus_info, sizeof(info->bus_info),
2470                                 "SBUS:%d",
2471                                 regs->which_io);
2472         }
2473 #endif
2474 }
2475 
2476 static u32 hme_get_link(struct net_device *dev)
2477 {
2478         struct happy_meal *hp = netdev_priv(dev);
2479 
2480         spin_lock_irq(&hp->happy_lock);
2481         hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2482         spin_unlock_irq(&hp->happy_lock);
2483 
2484         return hp->sw_bmsr & BMSR_LSTATUS;
2485 }
2486 
2487 static const struct ethtool_ops hme_ethtool_ops = {
2488         .get_settings           = hme_get_settings,
2489         .set_settings           = hme_set_settings,
2490         .get_drvinfo            = hme_get_drvinfo,
2491         .get_link               = hme_get_link,
2492 };
2493 
2494 static int hme_version_printed;
2495 
2496 #ifdef CONFIG_SBUS
2497 /* Given a happy meal sbus device, find it's quattro parent.
2498  * If none exist, allocate and return a new one.
2499  *
2500  * Return NULL on failure.
2501  */
2502 static struct quattro *quattro_sbus_find(struct platform_device *child)
2503 {
2504         struct device *parent = child->dev.parent;
2505         struct platform_device *op;
2506         struct quattro *qp;
2507 
2508         op = to_platform_device(parent);
2509         qp = platform_get_drvdata(op);
2510         if (qp)
2511                 return qp;
2512 
2513         qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2514         if (qp != NULL) {
2515                 int i;
2516 
2517                 for (i = 0; i < 4; i++)
2518                         qp->happy_meals[i] = NULL;
2519 
2520                 qp->quattro_dev = child;
2521                 qp->next = qfe_sbus_list;
2522                 qfe_sbus_list = qp;
2523 
2524                 platform_set_drvdata(op, qp);
2525         }
2526         return qp;
2527 }
2528 
2529 /* After all quattro cards have been probed, we call these functions
2530  * to register the IRQ handlers for the cards that have been
2531  * successfully probed and skip the cards that failed to initialize
2532  */
2533 static int __init quattro_sbus_register_irqs(void)
2534 {
2535         struct quattro *qp;
2536 
2537         for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2538                 struct platform_device *op = qp->quattro_dev;
2539                 int err, qfe_slot, skip = 0;
2540 
2541                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2542                         if (!qp->happy_meals[qfe_slot])
2543                                 skip = 1;
2544                 }
2545                 if (skip)
2546                         continue;
2547 
2548                 err = request_irq(op->archdata.irqs[0],
2549                                   quattro_sbus_interrupt,
2550                                   IRQF_SHARED, "Quattro",
2551                                   qp);
2552                 if (err != 0) {
2553                         printk(KERN_ERR "Quattro HME: IRQ registration "
2554                                "error %d.\n", err);
2555                         return err;
2556                 }
2557         }
2558 
2559         return 0;
2560 }
2561 
2562 static void quattro_sbus_free_irqs(void)
2563 {
2564         struct quattro *qp;
2565 
2566         for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2567                 struct platform_device *op = qp->quattro_dev;
2568                 int qfe_slot, skip = 0;
2569 
2570                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2571                         if (!qp->happy_meals[qfe_slot])
2572                                 skip = 1;
2573                 }
2574                 if (skip)
2575                         continue;
2576 
2577                 free_irq(op->archdata.irqs[0], qp);
2578         }
2579 }
2580 #endif /* CONFIG_SBUS */
2581 
2582 #ifdef CONFIG_PCI
2583 static struct quattro *quattro_pci_find(struct pci_dev *pdev)
2584 {
2585         struct pci_dev *bdev = pdev->bus->self;
2586         struct quattro *qp;
2587 
2588         if (!bdev) return NULL;
2589         for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
2590                 struct pci_dev *qpdev = qp->quattro_dev;
2591 
2592                 if (qpdev == bdev)
2593                         return qp;
2594         }
2595         qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2596         if (qp != NULL) {
2597                 int i;
2598 
2599                 for (i = 0; i < 4; i++)
2600                         qp->happy_meals[i] = NULL;
2601 
2602                 qp->quattro_dev = bdev;
2603                 qp->next = qfe_pci_list;
2604                 qfe_pci_list = qp;
2605 
2606                 /* No range tricks necessary on PCI. */
2607                 qp->nranges = 0;
2608         }
2609         return qp;
2610 }
2611 #endif /* CONFIG_PCI */
2612 
2613 static const struct net_device_ops hme_netdev_ops = {
2614         .ndo_open               = happy_meal_open,
2615         .ndo_stop               = happy_meal_close,
2616         .ndo_start_xmit         = happy_meal_start_xmit,
2617         .ndo_tx_timeout         = happy_meal_tx_timeout,
2618         .ndo_get_stats          = happy_meal_get_stats,
2619         .ndo_set_rx_mode        = happy_meal_set_multicast,
2620         .ndo_change_mtu         = eth_change_mtu,
2621         .ndo_set_mac_address    = eth_mac_addr,
2622         .ndo_validate_addr      = eth_validate_addr,
2623 };
2624 
2625 #ifdef CONFIG_SBUS
2626 static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
2627 {
2628         struct device_node *dp = op->dev.of_node, *sbus_dp;
2629         struct quattro *qp = NULL;
2630         struct happy_meal *hp;
2631         struct net_device *dev;
2632         int i, qfe_slot = -1;
2633         int err = -ENODEV;
2634 
2635         sbus_dp = op->dev.parent->of_node;
2636 
2637         /* We can match PCI devices too, do not accept those here. */
2638         if (strcmp(sbus_dp->name, "sbus") && strcmp(sbus_dp->name, "sbi"))
2639                 return err;
2640 
2641         if (is_qfe) {
2642                 qp = quattro_sbus_find(op);
2643                 if (qp == NULL)
2644                         goto err_out;
2645                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2646                         if (qp->happy_meals[qfe_slot] == NULL)
2647                                 break;
2648                 if (qfe_slot == 4)
2649                         goto err_out;
2650         }
2651 
2652         err = -ENOMEM;
2653         dev = alloc_etherdev(sizeof(struct happy_meal));
2654         if (!dev)
2655                 goto err_out;
2656         SET_NETDEV_DEV(dev, &op->dev);
2657 
2658         if (hme_version_printed++ == 0)
2659                 printk(KERN_INFO "%s", version);
2660 
2661         /* If user did not specify a MAC address specifically, use
2662          * the Quattro local-mac-address property...
2663          */
2664         for (i = 0; i < 6; i++) {
2665                 if (macaddr[i] != 0)
2666                         break;
2667         }
2668         if (i < 6) { /* a mac address was given */
2669                 for (i = 0; i < 6; i++)
2670                         dev->dev_addr[i] = macaddr[i];
2671                 macaddr[5]++;
2672         } else {
2673                 const unsigned char *addr;
2674                 int len;
2675 
2676                 addr = of_get_property(dp, "local-mac-address", &len);
2677 
2678                 if (qfe_slot != -1 && addr && len == ETH_ALEN)
2679                         memcpy(dev->dev_addr, addr, ETH_ALEN);
2680                 else
2681                         memcpy(dev->dev_addr, idprom->id_ethaddr, ETH_ALEN);
2682         }
2683 
2684         hp = netdev_priv(dev);
2685 
2686         hp->happy_dev = op;
2687         hp->dma_dev = &op->dev;
2688 
2689         spin_lock_init(&hp->happy_lock);
2690 
2691         err = -ENODEV;
2692         if (qp != NULL) {
2693                 hp->qfe_parent = qp;
2694                 hp->qfe_ent = qfe_slot;
2695                 qp->happy_meals[qfe_slot] = dev;
2696         }
2697 
2698         hp->gregs = of_ioremap(&op->resource[0], 0,
2699                                GREG_REG_SIZE, "HME Global Regs");
2700         if (!hp->gregs) {
2701                 printk(KERN_ERR "happymeal: Cannot map global registers.\n");
2702                 goto err_out_free_netdev;
2703         }
2704 
2705         hp->etxregs = of_ioremap(&op->resource[1], 0,
2706                                  ETX_REG_SIZE, "HME TX Regs");
2707         if (!hp->etxregs) {
2708                 printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
2709                 goto err_out_iounmap;
2710         }
2711 
2712         hp->erxregs = of_ioremap(&op->resource[2], 0,
2713                                  ERX_REG_SIZE, "HME RX Regs");
2714         if (!hp->erxregs) {
2715                 printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
2716                 goto err_out_iounmap;
2717         }
2718 
2719         hp->bigmacregs = of_ioremap(&op->resource[3], 0,
2720                                     BMAC_REG_SIZE, "HME BIGMAC Regs");
2721         if (!hp->bigmacregs) {
2722                 printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
2723                 goto err_out_iounmap;
2724         }
2725 
2726         hp->tcvregs = of_ioremap(&op->resource[4], 0,
2727                                  TCVR_REG_SIZE, "HME Tranceiver Regs");
2728         if (!hp->tcvregs) {
2729                 printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
2730                 goto err_out_iounmap;
2731         }
2732 
2733         hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
2734         if (hp->hm_revision == 0xff)
2735                 hp->hm_revision = 0xa0;
2736 
2737         /* Now enable the feature flags we can. */
2738         if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
2739                 hp->happy_flags = HFLAG_20_21;
2740         else if (hp->hm_revision != 0xa0)
2741                 hp->happy_flags = HFLAG_NOT_A0;
2742 
2743         if (qp != NULL)
2744                 hp->happy_flags |= HFLAG_QUATTRO;
2745 
2746         /* Get the supported DVMA burst sizes from our Happy SBUS. */
2747         hp->happy_bursts = of_getintprop_default(sbus_dp,
2748                                                  "burst-sizes", 0x00);
2749 
2750         hp->happy_block = dma_alloc_coherent(hp->dma_dev,
2751                                              PAGE_SIZE,
2752                                              &hp->hblock_dvma,
2753                                              GFP_ATOMIC);
2754         err = -ENOMEM;
2755         if (!hp->happy_block)
2756                 goto err_out_iounmap;
2757 
2758         /* Force check of the link first time we are brought up. */
2759         hp->linkcheck = 0;
2760 
2761         /* Force timer state to 'asleep' with count of zero. */
2762         hp->timer_state = asleep;
2763         hp->timer_ticks = 0;
2764 
2765         init_timer(&hp->happy_timer);
2766 
2767         hp->dev = dev;
2768         dev->netdev_ops = &hme_netdev_ops;
2769         dev->watchdog_timeo = 5*HZ;
2770         dev->ethtool_ops = &hme_ethtool_ops;
2771 
2772         /* Happy Meal can do it all... */
2773         dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
2774         dev->features |= dev->hw_features | NETIF_F_RXCSUM;
2775 
2776         hp->irq = op->archdata.irqs[0];
2777 
2778 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
2779         /* Hook up SBUS register/descriptor accessors. */
2780         hp->read_desc32 = sbus_hme_read_desc32;
2781         hp->write_txd = sbus_hme_write_txd;
2782         hp->write_rxd = sbus_hme_write_rxd;
2783         hp->read32 = sbus_hme_read32;
2784         hp->write32 = sbus_hme_write32;
2785 #endif
2786 
2787         /* Grrr, Happy Meal comes up by default not advertising
2788          * full duplex 100baseT capabilities, fix this.
2789          */
2790         spin_lock_irq(&hp->happy_lock);
2791         happy_meal_set_initial_advertisement(hp);
2792         spin_unlock_irq(&hp->happy_lock);
2793 
2794         err = register_netdev(hp->dev);
2795         if (err) {
2796                 printk(KERN_ERR "happymeal: Cannot register net device, "
2797                        "aborting.\n");
2798                 goto err_out_free_coherent;
2799         }
2800 
2801         platform_set_drvdata(op, hp);
2802 
2803         if (qfe_slot != -1)
2804                 printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
2805                        dev->name, qfe_slot);
2806         else
2807                 printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
2808                        dev->name);
2809 
2810         printk("%pM\n", dev->dev_addr);
2811 
2812         return 0;
2813 
2814 err_out_free_coherent:
2815         dma_free_coherent(hp->dma_dev,
2816                           PAGE_SIZE,
2817                           hp->happy_block,
2818                           hp->hblock_dvma);
2819 
2820 err_out_iounmap:
2821         if (hp->gregs)
2822                 of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
2823         if (hp->etxregs)
2824                 of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
2825         if (hp->erxregs)
2826                 of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
2827         if (hp->bigmacregs)
2828                 of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
2829         if (hp->tcvregs)
2830                 of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
2831 
2832         if (qp)
2833                 qp->happy_meals[qfe_slot] = NULL;
2834 
2835 err_out_free_netdev:
2836         free_netdev(dev);
2837 
2838 err_out:
2839         return err;
2840 }
2841 #endif
2842 
2843 #ifdef CONFIG_PCI
2844 #ifndef CONFIG_SPARC
2845 static int is_quattro_p(struct pci_dev *pdev)
2846 {
2847         struct pci_dev *busdev = pdev->bus->self;
2848         struct pci_dev *this_pdev;
2849         int n_hmes;
2850 
2851         if (busdev == NULL ||
2852             busdev->vendor != PCI_VENDOR_ID_DEC ||
2853             busdev->device != PCI_DEVICE_ID_DEC_21153)
2854                 return 0;
2855 
2856         n_hmes = 0;
2857         list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
2858                 if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
2859                     this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
2860                         n_hmes++;
2861         }
2862 
2863         if (n_hmes != 4)
2864                 return 0;
2865 
2866         return 1;
2867 }
2868 
2869 /* Fetch MAC address from vital product data of PCI ROM. */
2870 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
2871 {
2872         int this_offset;
2873 
2874         for (this_offset = 0x20; this_offset < len; this_offset++) {
2875                 void __iomem *p = rom_base + this_offset;
2876 
2877                 if (readb(p + 0) != 0x90 ||
2878                     readb(p + 1) != 0x00 ||
2879                     readb(p + 2) != 0x09 ||
2880                     readb(p + 3) != 0x4e ||
2881                     readb(p + 4) != 0x41 ||
2882                     readb(p + 5) != 0x06)
2883                         continue;
2884 
2885                 this_offset += 6;
2886                 p += 6;
2887 
2888                 if (index == 0) {
2889                         int i;
2890 
2891                         for (i = 0; i < 6; i++)
2892                                 dev_addr[i] = readb(p + i);
2893                         return 1;
2894                 }
2895                 index--;
2896         }
2897         return 0;
2898 }
2899 
2900 static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
2901 {
2902         size_t size;
2903         void __iomem *p = pci_map_rom(pdev, &size);
2904 
2905         if (p) {
2906                 int index = 0;
2907                 int found;
2908 
2909                 if (is_quattro_p(pdev))
2910                         index = PCI_SLOT(pdev->devfn);
2911 
2912                 found = readb(p) == 0x55 &&
2913                         readb(p + 1) == 0xaa &&
2914                         find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
2915                 pci_unmap_rom(pdev, p);
2916                 if (found)
2917                         return;
2918         }
2919 
2920         /* Sun MAC prefix then 3 random bytes. */
2921         dev_addr[0] = 0x08;
2922         dev_addr[1] = 0x00;
2923         dev_addr[2] = 0x20;
2924         get_random_bytes(&dev_addr[3], 3);
2925 }
2926 #endif /* !(CONFIG_SPARC) */
2927 
2928 static int happy_meal_pci_probe(struct pci_dev *pdev,
2929                                 const struct pci_device_id *ent)
2930 {
2931         struct quattro *qp = NULL;
2932 #ifdef CONFIG_SPARC
2933         struct device_node *dp;
2934 #endif
2935         struct happy_meal *hp;
2936         struct net_device *dev;
2937         void __iomem *hpreg_base;
2938         unsigned long hpreg_res;
2939         int i, qfe_slot = -1;
2940         char prom_name[64];
2941         int err;
2942 
2943         /* Now make sure pci_dev cookie is there. */
2944 #ifdef CONFIG_SPARC
2945         dp = pci_device_to_OF_node(pdev);
2946         strcpy(prom_name, dp->name);
2947 #else
2948         if (is_quattro_p(pdev))
2949                 strcpy(prom_name, "SUNW,qfe");
2950         else
2951                 strcpy(prom_name, "SUNW,hme");
2952 #endif
2953 
2954         err = -ENODEV;
2955 
2956         if (pci_enable_device(pdev))
2957                 goto err_out;
2958         pci_set_master(pdev);
2959 
2960         if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
2961                 qp = quattro_pci_find(pdev);
2962                 if (qp == NULL)
2963                         goto err_out;
2964                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2965                         if (qp->happy_meals[qfe_slot] == NULL)
2966                                 break;
2967                 if (qfe_slot == 4)
2968                         goto err_out;
2969         }
2970 
2971         dev = alloc_etherdev(sizeof(struct happy_meal));
2972         err = -ENOMEM;
2973         if (!dev)
2974                 goto err_out;
2975         SET_NETDEV_DEV(dev, &pdev->dev);
2976 
2977         if (hme_version_printed++ == 0)
2978                 printk(KERN_INFO "%s", version);
2979 
2980         hp = netdev_priv(dev);
2981 
2982         hp->happy_dev = pdev;
2983         hp->dma_dev = &pdev->dev;
2984 
2985         spin_lock_init(&hp->happy_lock);
2986 
2987         if (qp != NULL) {
2988                 hp->qfe_parent = qp;
2989                 hp->qfe_ent = qfe_slot;
2990                 qp->happy_meals[qfe_slot] = dev;
2991         }
2992 
2993         hpreg_res = pci_resource_start(pdev, 0);
2994         err = -ENODEV;
2995         if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
2996                 printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
2997                 goto err_out_clear_quattro;
2998         }
2999         if (pci_request_regions(pdev, DRV_NAME)) {
3000                 printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
3001                        "aborting.\n");
3002                 goto err_out_clear_quattro;
3003         }
3004 
3005         if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
3006                 printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
3007                 goto err_out_free_res;
3008         }
3009 
3010         for (i = 0; i < 6; i++) {
3011                 if (macaddr[i] != 0)
3012                         break;
3013         }
3014         if (i < 6) { /* a mac address was given */
3015                 for (i = 0; i < 6; i++)
3016                         dev->dev_addr[i] = macaddr[i];
3017                 macaddr[5]++;
3018         } else {
3019 #ifdef CONFIG_SPARC
3020                 const unsigned char *addr;
3021                 int len;
3022 
3023                 if (qfe_slot != -1 &&
3024                     (addr = of_get_property(dp, "local-mac-address", &len))
3025                         != NULL &&
3026                     len == 6) {
3027                         memcpy(dev->dev_addr, addr, ETH_ALEN);
3028                 } else {
3029                         memcpy(dev->dev_addr, idprom->id_ethaddr, ETH_ALEN);
3030                 }
3031 #else
3032                 get_hme_mac_nonsparc(pdev, &dev->dev_addr[0]);
3033 #endif
3034         }
3035 
3036         /* Layout registers. */
3037         hp->gregs      = (hpreg_base + 0x0000UL);
3038         hp->etxregs    = (hpreg_base + 0x2000UL);
3039         hp->erxregs    = (hpreg_base + 0x4000UL);
3040         hp->bigmacregs = (hpreg_base + 0x6000UL);
3041         hp->tcvregs    = (hpreg_base + 0x7000UL);
3042 
3043 #ifdef CONFIG_SPARC
3044         hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
3045         if (hp->hm_revision == 0xff)
3046                 hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
3047 #else
3048         /* works with this on non-sparc hosts */
3049         hp->hm_revision = 0x20;
3050 #endif
3051 
3052         /* Now enable the feature flags we can. */
3053         if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
3054                 hp->happy_flags = HFLAG_20_21;
3055         else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
3056                 hp->happy_flags = HFLAG_NOT_A0;
3057 
3058         if (qp != NULL)
3059                 hp->happy_flags |= HFLAG_QUATTRO;
3060 
3061         /* And of course, indicate this is PCI. */
3062         hp->happy_flags |= HFLAG_PCI;
3063 
3064 #ifdef CONFIG_SPARC
3065         /* Assume PCI happy meals can handle all burst sizes. */
3066         hp->happy_bursts = DMA_BURSTBITS;
3067 #endif
3068 
3069         hp->happy_block = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
3070                                              &hp->hblock_dvma, GFP_KERNEL);
3071         err = -ENODEV;
3072         if (!hp->happy_block)
3073                 goto err_out_iounmap;
3074 
3075         hp->linkcheck = 0;
3076         hp->timer_state = asleep;
3077         hp->timer_ticks = 0;
3078 
3079         init_timer(&hp->happy_timer);
3080 
3081         hp->irq = pdev->irq;
3082         hp->dev = dev;
3083         dev->netdev_ops = &hme_netdev_ops;
3084         dev->watchdog_timeo = 5*HZ;
3085         dev->ethtool_ops = &hme_ethtool_ops;
3086 
3087         /* Happy Meal can do it all... */
3088         dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
3089         dev->features |= dev->hw_features | NETIF_F_RXCSUM;
3090 
3091 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
3092         /* Hook up PCI register/descriptor accessors. */
3093         hp->read_desc32 = pci_hme_read_desc32;
3094         hp->write_txd = pci_hme_write_txd;
3095         hp->write_rxd = pci_hme_write_rxd;
3096         hp->read32 = pci_hme_read32;
3097         hp->write32 = pci_hme_write32;
3098 #endif
3099 
3100         /* Grrr, Happy Meal comes up by default not advertising
3101          * full duplex 100baseT capabilities, fix this.
3102          */
3103         spin_lock_irq(&hp->happy_lock);
3104         happy_meal_set_initial_advertisement(hp);
3105         spin_unlock_irq(&hp->happy_lock);
3106 
3107         err = register_netdev(hp->dev);
3108         if (err) {
3109                 printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
3110                        "aborting.\n");
3111                 goto err_out_iounmap;
3112         }
3113 
3114         pci_set_drvdata(pdev, hp);
3115 
3116         if (!qfe_slot) {
3117                 struct pci_dev *qpdev = qp->quattro_dev;
3118 
3119                 prom_name[0] = 0;
3120                 if (!strncmp(dev->name, "eth", 3)) {
3121                         int i = simple_strtoul(dev->name + 3, NULL, 10);
3122                         sprintf(prom_name, "-%d", i + 3);
3123                 }
3124                 printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
3125                 if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
3126                     qpdev->device == PCI_DEVICE_ID_DEC_21153)
3127                         printk("DEC 21153 PCI Bridge\n");
3128                 else
3129                         printk("unknown bridge %04x.%04x\n",
3130                                 qpdev->vendor, qpdev->device);
3131         }
3132 
3133         if (qfe_slot != -1)
3134                 printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
3135                        dev->name, qfe_slot);
3136         else
3137                 printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
3138                        dev->name);
3139 
3140         printk("%pM\n", dev->dev_addr);
3141 
3142         return 0;
3143 
3144 err_out_iounmap:
3145         iounmap(hp->gregs);
3146 
3147 err_out_free_res:
3148         pci_release_regions(pdev);
3149 
3150 err_out_clear_quattro:
3151         if (qp != NULL)
3152                 qp->happy_meals[qfe_slot] = NULL;
3153 
3154         free_netdev(dev);
3155 
3156 err_out:
3157         return err;
3158 }
3159 
3160 static void happy_meal_pci_remove(struct pci_dev *pdev)
3161 {
3162         struct happy_meal *hp = pci_get_drvdata(pdev);
3163         struct net_device *net_dev = hp->dev;
3164 
3165         unregister_netdev(net_dev);
3166 
3167         dma_free_coherent(hp->dma_dev, PAGE_SIZE,
3168                           hp->happy_block, hp->hblock_dvma);
3169         iounmap(hp->gregs);
3170         pci_release_regions(hp->happy_dev);
3171 
3172         free_netdev(net_dev);
3173 }
3174 
3175 static DEFINE_PCI_DEVICE_TABLE(happymeal_pci_ids) = {
3176         { PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
3177         { }                     /* Terminating entry */
3178 };
3179 
3180 MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
3181 
3182 static struct pci_driver hme_pci_driver = {
3183         .name           = "hme",
3184         .id_table       = happymeal_pci_ids,
3185         .probe          = happy_meal_pci_probe,
3186         .remove         = happy_meal_pci_remove,
3187 };
3188 
3189 static int __init happy_meal_pci_init(void)
3190 {
3191         return pci_register_driver(&hme_pci_driver);
3192 }
3193 
3194 static void happy_meal_pci_exit(void)
3195 {
3196         pci_unregister_driver(&hme_pci_driver);
3197 
3198         while (qfe_pci_list) {
3199                 struct quattro *qfe = qfe_pci_list;
3200                 struct quattro *next = qfe->next;
3201 
3202                 kfree(qfe);
3203 
3204                 qfe_pci_list = next;
3205         }
3206 }
3207 
3208 #endif
3209 
3210 #ifdef CONFIG_SBUS
3211 static const struct of_device_id hme_sbus_match[];
3212 static int hme_sbus_probe(struct platform_device *op)
3213 {
3214         const struct of_device_id *match;
3215         struct device_node *dp = op->dev.of_node;
3216         const char *model = of_get_property(dp, "model", NULL);
3217         int is_qfe;
3218 
3219         match = of_match_device(hme_sbus_match, &op->dev);
3220         if (!match)
3221                 return -EINVAL;
3222         is_qfe = (match->data != NULL);
3223 
3224         if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
3225                 is_qfe = 1;
3226 
3227         return happy_meal_sbus_probe_one(op, is_qfe);
3228 }
3229 
3230 static int hme_sbus_remove(struct platform_device *op)
3231 {
3232         struct happy_meal *hp = platform_get_drvdata(op);
3233         struct net_device *net_dev = hp->dev;
3234 
3235         unregister_netdev(net_dev);
3236 
3237         /* XXX qfe parent interrupt... */
3238 
3239         of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
3240         of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
3241         of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
3242         of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
3243         of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
3244         dma_free_coherent(hp->dma_dev,
3245                           PAGE_SIZE,
3246                           hp->happy_block,
3247                           hp->hblock_dvma);
3248 
3249         free_netdev(net_dev);
3250 
3251         return 0;
3252 }
3253 
3254 static const struct of_device_id hme_sbus_match[] = {
3255         {
3256                 .name = "SUNW,hme",
3257         },
3258         {
3259                 .name = "SUNW,qfe",
3260                 .data = (void *) 1,
3261         },
3262         {
3263                 .name = "qfe",
3264                 .data = (void *) 1,
3265         },
3266         {},
3267 };
3268 
3269 MODULE_DEVICE_TABLE(of, hme_sbus_match);
3270 
3271 static struct platform_driver hme_sbus_driver = {
3272         .driver = {
3273                 .name = "hme",
3274                 .owner = THIS_MODULE,
3275                 .of_match_table = hme_sbus_match,
3276         },
3277         .probe          = hme_sbus_probe,
3278         .remove         = hme_sbus_remove,
3279 };
3280 
3281 static int __init happy_meal_sbus_init(void)
3282 {
3283         int err;
3284 
3285         err = platform_driver_register(&hme_sbus_driver);
3286         if (!err)
3287                 err = quattro_sbus_register_irqs();
3288 
3289         return err;
3290 }
3291 
3292 static void happy_meal_sbus_exit(void)
3293 {
3294         platform_driver_unregister(&hme_sbus_driver);
3295         quattro_sbus_free_irqs();
3296 
3297         while (qfe_sbus_list) {
3298                 struct quattro *qfe = qfe_sbus_list;
3299                 struct quattro *next = qfe->next;
3300 
3301                 kfree(qfe);
3302 
3303                 qfe_sbus_list = next;
3304         }
3305 }
3306 #endif
3307 
3308 static int __init happy_meal_probe(void)
3309 {
3310         int err = 0;
3311 
3312 #ifdef CONFIG_SBUS
3313         err = happy_meal_sbus_init();
3314 #endif
3315 #ifdef CONFIG_PCI
3316         if (!err) {
3317                 err = happy_meal_pci_init();
3318 #ifdef CONFIG_SBUS
3319                 if (err)
3320                         happy_meal_sbus_exit();
3321 #endif
3322         }
3323 #endif
3324 
3325         return err;
3326 }
3327 
3328 
3329 static void __exit happy_meal_exit(void)
3330 {
3331 #ifdef CONFIG_SBUS
3332         happy_meal_sbus_exit();
3333 #endif
3334 #ifdef CONFIG_PCI
3335         happy_meal_pci_exit();
3336 #endif
3337 }
3338 
3339 module_init(happy_meal_probe);
3340 module_exit(happy_meal_exit);
3341 

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