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sched: fair: weight calculations
[linux-2.6/zen-sources.git] / drivers / net / sunhme.c
blobb4e7f30ea4e8c1d9d186ee91b55c41925136bb9d
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 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
38 #include <asm/system.h>
39 #include <asm/io.h>
40 #include <asm/dma.h>
41 #include <asm/byteorder.h>
42
43 #ifdef CONFIG_SPARC
44 #include <asm/idprom.h>
45 #include <asm/sbus.h>
46 #include <asm/openprom.h>
47 #include <asm/oplib.h>
48 #include <asm/prom.h>
49 #include <asm/auxio.h>
50 #endif
51 #include <asm/uaccess.h>
52
53 #include <asm/pgtable.h>
54 #include <asm/irq.h>
55
56 #ifdef CONFIG_PCI
57 #include <linux/pci.h>
58 #endif
59
60 #include "sunhme.h"
61
62 #define DRV_NAME "sunhme"
63 #define DRV_VERSION "3.00"
64 #define DRV_RELDATE "June 23, 2006"
65 #define DRV_AUTHOR "David S. Miller (davem@davemloft.net)"
66
67 static char version[] =
68 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
69
70 MODULE_VERSION(DRV_VERSION);
71 MODULE_AUTHOR(DRV_AUTHOR);
72 MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
73 MODULE_LICENSE("GPL");
74
75 static int macaddr[6];
76
77 /* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
78 module_param_array(macaddr, int, NULL, 0);
79 MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
80
81 #ifdef CONFIG_SBUS
82 static struct quattro *qfe_sbus_list;
83 #endif
84
85 #ifdef CONFIG_PCI
86 static struct quattro *qfe_pci_list;
87 #endif
88
89 #undef HMEDEBUG
90 #undef SXDEBUG
91 #undef RXDEBUG
92 #undef TXDEBUG
93 #undef TXLOGGING
94
95 #ifdef TXLOGGING
96 struct hme_tx_logent {
97 unsigned int tstamp;
98 int tx_new, tx_old;
99 unsigned int action;
100 #define TXLOG_ACTION_IRQ 0x01
101 #define TXLOG_ACTION_TXMIT 0x02
102 #define TXLOG_ACTION_TBUSY 0x04
103 #define TXLOG_ACTION_NBUFS 0x08
104 unsigned int status;
105 };
106 #define TX_LOG_LEN 128
107 static struct hme_tx_logent tx_log[TX_LOG_LEN];
108 static int txlog_cur_entry;
109 static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
110 {
111 struct hme_tx_logent *tlp;
112 unsigned long flags;
113
114 save_and_cli(flags);
115 tlp = &tx_log[txlog_cur_entry];
116 tlp->tstamp = (unsigned int)jiffies;
117 tlp->tx_new = hp->tx_new;
118 tlp->tx_old = hp->tx_old;
119 tlp->action = a;
120 tlp->status = s;
121 txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
122 restore_flags(flags);
123 }
124 static __inline__ void tx_dump_log(void)
125 {
126 int i, this;
127
128 this = txlog_cur_entry;
129 for (i = 0; i < TX_LOG_LEN; i++) {
130 printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
131 tx_log[this].tstamp,
132 tx_log[this].tx_new, tx_log[this].tx_old,
133 tx_log[this].action, tx_log[this].status);
134 this = (this + 1) & (TX_LOG_LEN - 1);
135 }
136 }
137 static __inline__ void tx_dump_ring(struct happy_meal *hp)
138 {
139 struct hmeal_init_block *hb = hp->happy_block;
140 struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
141 int i;
142
143 for (i = 0; i < TX_RING_SIZE; i+=4) {
144 printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
145 i, i + 4,
146 le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
147 le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
148 le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
149 le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
150 }
151 }
152 #else
153 #define tx_add_log(hp, a, s) do { } while(0)
154 #define tx_dump_log() do { } while(0)
155 #define tx_dump_ring(hp) do { } while(0)
156 #endif
157
158 #ifdef HMEDEBUG
159 #define HMD(x) printk x
160 #else
161 #define HMD(x)
162 #endif
163
164 /* #define AUTO_SWITCH_DEBUG */
165
166 #ifdef AUTO_SWITCH_DEBUG
167 #define ASD(x) printk x
168 #else
169 #define ASD(x)
170 #endif
171
172 #define DEFAULT_IPG0 16 /* For lance-mode only */
173 #define DEFAULT_IPG1 8 /* For all modes */
174 #define DEFAULT_IPG2 4 /* For all modes */
175 #define DEFAULT_JAMSIZE 4 /* Toe jam */
176
177 /* NOTE: In the descriptor writes one _must_ write the address
178 * member _first_. The card must not be allowed to see
179 * the updated descriptor flags until the address is
180 * correct. I've added a write memory barrier between
181 * the two stores so that I can sleep well at night... -DaveM
182 */
183
184 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
185 static void sbus_hme_write32(void __iomem *reg, u32 val)
186 {
187 sbus_writel(val, reg);
188 }
189
190 static u32 sbus_hme_read32(void __iomem *reg)
191 {
192 return sbus_readl(reg);
193 }
194
195 static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
196 {
197 rxd->rx_addr = (__force hme32)addr;
198 wmb();
199 rxd->rx_flags = (__force hme32)flags;
200 }
201
202 static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
203 {
204 txd->tx_addr = (__force hme32)addr;
205 wmb();
206 txd->tx_flags = (__force hme32)flags;
207 }
208
209 static u32 sbus_hme_read_desc32(hme32 *p)
210 {
211 return (__force u32)*p;
212 }
213
214 static void pci_hme_write32(void __iomem *reg, u32 val)
215 {
216 writel(val, reg);
217 }
218
219 static u32 pci_hme_read32(void __iomem *reg)
220 {
221 return readl(reg);
222 }
223
224 static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
225 {
226 rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
227 wmb();
228 rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
229 }
230
231 static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
232 {
233 txd->tx_addr = (__force hme32)cpu_to_le32(addr);
234 wmb();
235 txd->tx_flags = (__force hme32)cpu_to_le32(flags);
236 }
237
238 static u32 pci_hme_read_desc32(hme32 *p)
239 {
240 return le32_to_cpup((__le32 *)p);
241 }
242
243 #define hme_write32(__hp, __reg, __val) \
244 ((__hp)->write32((__reg), (__val)))
245 #define hme_read32(__hp, __reg) \
246 ((__hp)->read32(__reg))
247 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
248 ((__hp)->write_rxd((__rxd), (__flags), (__addr)))
249 #define hme_write_txd(__hp, __txd, __flags, __addr) \
250 ((__hp)->write_txd((__txd), (__flags), (__addr)))
251 #define hme_read_desc32(__hp, __p) \
252 ((__hp)->read_desc32(__p))
253 #define hme_dma_map(__hp, __ptr, __size, __dir) \
254 ((__hp)->dma_map((__hp)->happy_dev, (__ptr), (__size), (__dir)))
255 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
256 ((__hp)->dma_unmap((__hp)->happy_dev, (__addr), (__size), (__dir)))
257 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
258 ((__hp)->dma_sync_for_cpu((__hp)->happy_dev, (__addr), (__size), (__dir)))
259 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
260 ((__hp)->dma_sync_for_device((__hp)->happy_dev, (__addr), (__size), (__dir)))
261 #else
262 #ifdef CONFIG_SBUS
263 /* SBUS only compilation */
264 #define hme_write32(__hp, __reg, __val) \
265 sbus_writel((__val), (__reg))
266 #define hme_read32(__hp, __reg) \
267 sbus_readl(__reg)
268 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
269 do { (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
270 wmb(); \
271 (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
272 } while(0)
273 #define hme_write_txd(__hp, __txd, __flags, __addr) \
274 do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
275 wmb(); \
276 (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
277 } while(0)
278 #define hme_read_desc32(__hp, __p) ((__force u32)(hme32)*(__p))
279 #define hme_dma_map(__hp, __ptr, __size, __dir) \
280 sbus_map_single((__hp)->happy_dev, (__ptr), (__size), (__dir))
281 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
282 sbus_unmap_single((__hp)->happy_dev, (__addr), (__size), (__dir))
283 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
284 sbus_dma_sync_single_for_cpu((__hp)->happy_dev, (__addr), (__size), (__dir))
285 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
286 sbus_dma_sync_single_for_device((__hp)->happy_dev, (__addr), (__size), (__dir))
287 #else
288 /* PCI only compilation */
289 #define hme_write32(__hp, __reg, __val) \
290 writel((__val), (__reg))
291 #define hme_read32(__hp, __reg) \
292 readl(__reg)
293 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
294 do { (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
295 wmb(); \
296 (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
297 } while(0)
298 #define hme_write_txd(__hp, __txd, __flags, __addr) \
299 do { (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
300 wmb(); \
301 (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
302 } while(0)
303 static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
304 {
305 return le32_to_cpup((__le32 *)p);
306 }
307 #define hme_dma_map(__hp, __ptr, __size, __dir) \
308 pci_map_single((__hp)->happy_dev, (__ptr), (__size), (__dir))
309 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
310 pci_unmap_single((__hp)->happy_dev, (__addr), (__size), (__dir))
311 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
312 pci_dma_sync_single_for_cpu((__hp)->happy_dev, (__addr), (__size), (__dir))
313 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
314 pci_dma_sync_single_for_device((__hp)->happy_dev, (__addr), (__size), (__dir))
315 #endif
316 #endif
317
318
319 #ifdef SBUS_DMA_BIDIRECTIONAL
320 # define DMA_BIDIRECTIONAL SBUS_DMA_BIDIRECTIONAL
321 #else
322 # define DMA_BIDIRECTIONAL 0
323 #endif
324
325 #ifdef SBUS_DMA_FROMDEVICE
326 # define DMA_FROMDEVICE SBUS_DMA_FROMDEVICE
327 #else
328 # define DMA_TODEVICE 1
329 #endif
330
331 #ifdef SBUS_DMA_TODEVICE
332 # define DMA_TODEVICE SBUS_DMA_TODEVICE
333 #else
334 # define DMA_FROMDEVICE 2
335 #endif
336
337
338 /* Oh yes, the MIF BitBang is mighty fun to program. BitBucket is more like it. */
339 static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
340 {
341 hme_write32(hp, tregs + TCVR_BBDATA, bit);
342 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
343 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
344 }
345
346 #if 0
347 static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
348 {
349 u32 ret;
350
351 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
352 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
353 ret = hme_read32(hp, tregs + TCVR_CFG);
354 if (internal)
355 ret &= TCV_CFG_MDIO0;
356 else
357 ret &= TCV_CFG_MDIO1;
358
359 return ret;
360 }
361 #endif
362
363 static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
364 {
365 u32 retval;
366
367 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
368 udelay(1);
369 retval = hme_read32(hp, tregs + TCVR_CFG);
370 if (internal)
371 retval &= TCV_CFG_MDIO0;
372 else
373 retval &= TCV_CFG_MDIO1;
374 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
375
376 return retval;
377 }
378
379 #define TCVR_FAILURE 0x80000000 /* Impossible MIF read value */
380
381 static int happy_meal_bb_read(struct happy_meal *hp,
382 void __iomem *tregs, int reg)
383 {
384 u32 tmp;
385 int retval = 0;
386 int i;
387
388 ASD(("happy_meal_bb_read: reg=%d ", reg));
389
390 /* Enable the MIF BitBang outputs. */
391 hme_write32(hp, tregs + TCVR_BBOENAB, 1);
392
393 /* Force BitBang into the idle state. */
394 for (i = 0; i < 32; i++)
395 BB_PUT_BIT(hp, tregs, 1);
396
397 /* Give it the read sequence. */
398 BB_PUT_BIT(hp, tregs, 0);
399 BB_PUT_BIT(hp, tregs, 1);
400 BB_PUT_BIT(hp, tregs, 1);
401 BB_PUT_BIT(hp, tregs, 0);
402
403 /* Give it the PHY address. */
404 tmp = hp->paddr & 0xff;
405 for (i = 4; i >= 0; i--)
406 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
407
408 /* Tell it what register we want to read. */
409 tmp = (reg & 0xff);
410 for (i = 4; i >= 0; i--)
411 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
412
413 /* Close down the MIF BitBang outputs. */
414 hme_write32(hp, tregs + TCVR_BBOENAB, 0);
415
416 /* Now read in the value. */
417 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
418 for (i = 15; i >= 0; i--)
419 retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
420 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
421 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
422 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
423 ASD(("value=%x\n", retval));
424 return retval;
425 }
426
427 static void happy_meal_bb_write(struct happy_meal *hp,
428 void __iomem *tregs, int reg,
429 unsigned short value)
430 {
431 u32 tmp;
432 int i;
433
434 ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));
435
436 /* Enable the MIF BitBang outputs. */
437 hme_write32(hp, tregs + TCVR_BBOENAB, 1);
438
439 /* Force BitBang into the idle state. */
440 for (i = 0; i < 32; i++)
441 BB_PUT_BIT(hp, tregs, 1);
442
443 /* Give it write sequence. */
444 BB_PUT_BIT(hp, tregs, 0);
445 BB_PUT_BIT(hp, tregs, 1);
446 BB_PUT_BIT(hp, tregs, 0);
447 BB_PUT_BIT(hp, tregs, 1);
448
449 /* Give it the PHY address. */
450 tmp = (hp->paddr & 0xff);
451 for (i = 4; i >= 0; i--)
452 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
453
454 /* Tell it what register we will be writing. */
455 tmp = (reg & 0xff);
456 for (i = 4; i >= 0; i--)
457 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
458
459 /* Tell it to become ready for the bits. */
460 BB_PUT_BIT(hp, tregs, 1);
461 BB_PUT_BIT(hp, tregs, 0);
462
463 for (i = 15; i >= 0; i--)
464 BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
465
466 /* Close down the MIF BitBang outputs. */
467 hme_write32(hp, tregs + TCVR_BBOENAB, 0);
468 }
469
470 #define TCVR_READ_TRIES 16
471
472 static int happy_meal_tcvr_read(struct happy_meal *hp,
473 void __iomem *tregs, int reg)
474 {
475 int tries = TCVR_READ_TRIES;
476 int retval;
477
478 ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
479 if (hp->tcvr_type == none) {
480 ASD(("no transceiver, value=TCVR_FAILURE\n"));
481 return TCVR_FAILURE;
482 }
483
484 if (!(hp->happy_flags & HFLAG_FENABLE)) {
485 ASD(("doing bit bang\n"));
486 return happy_meal_bb_read(hp, tregs, reg);
487 }
488
489 hme_write32(hp, tregs + TCVR_FRAME,
490 (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
491 while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
492 udelay(20);
493 if (!tries) {
494 printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
495 return TCVR_FAILURE;
496 }
497 retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
498 ASD(("value=%04x\n", retval));
499 return retval;
500 }
501
502 #define TCVR_WRITE_TRIES 16
503
504 static void happy_meal_tcvr_write(struct happy_meal *hp,
505 void __iomem *tregs, int reg,
506 unsigned short value)
507 {
508 int tries = TCVR_WRITE_TRIES;
509
510 ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));
511
512 /* Welcome to Sun Microsystems, can I take your order please? */
513 if (!(hp->happy_flags & HFLAG_FENABLE)) {
514 happy_meal_bb_write(hp, tregs, reg, value);
515 return;
516 }
517
518 /* Would you like fries with that? */
519 hme_write32(hp, tregs + TCVR_FRAME,
520 (FRAME_WRITE | (hp->paddr << 23) |
521 ((reg & 0xff) << 18) | (value & 0xffff)));
522 while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
523 udelay(20);
524
525 /* Anything else? */
526 if (!tries)
527 printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");
528
529 /* Fifty-two cents is your change, have a nice day. */
530 }
531
532 /* Auto negotiation. The scheme is very simple. We have a timer routine
533 * that keeps watching the auto negotiation process as it progresses.
534 * The DP83840 is first told to start doing it's thing, we set up the time
535 * and place the timer state machine in it's initial state.
536 *
537 * Here the timer peeks at the DP83840 status registers at each click to see
538 * if the auto negotiation has completed, we assume here that the DP83840 PHY
539 * will time out at some point and just tell us what (didn't) happen. For
540 * complete coverage we only allow so many of the ticks at this level to run,
541 * when this has expired we print a warning message and try another strategy.
542 * This "other" strategy is to force the interface into various speed/duplex
543 * configurations and we stop when we see a link-up condition before the
544 * maximum number of "peek" ticks have occurred.
545 *
546 * Once a valid link status has been detected we configure the BigMAC and
547 * the rest of the Happy Meal to speak the most efficient protocol we could
548 * get a clean link for. The priority for link configurations, highest first
549 * is:
550 * 100 Base-T Full Duplex
551 * 100 Base-T Half Duplex
552 * 10 Base-T Full Duplex
553 * 10 Base-T Half Duplex
554 *
555 * We start a new timer now, after a successful auto negotiation status has
556 * been detected. This timer just waits for the link-up bit to get set in
557 * the BMCR of the DP83840. When this occurs we print a kernel log message
558 * describing the link type in use and the fact that it is up.
559 *
560 * If a fatal error of some sort is signalled and detected in the interrupt
561 * service routine, and the chip is reset, or the link is ifconfig'd down
562 * and then back up, this entire process repeats itself all over again.
563 */
564 static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
565 {
566 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
567
568 /* Downgrade from full to half duplex. Only possible
569 * via ethtool.
570 */
571 if (hp->sw_bmcr & BMCR_FULLDPLX) {
572 hp->sw_bmcr &= ~(BMCR_FULLDPLX);
573 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
574 return 0;
575 }
576
577 /* Downgrade from 100 to 10. */
578 if (hp->sw_bmcr & BMCR_SPEED100) {
579 hp->sw_bmcr &= ~(BMCR_SPEED100);
580 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
581 return 0;
582 }
583
584 /* We've tried everything. */
585 return -1;
586 }
587
588 static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
589 {
590 printk(KERN_INFO "%s: Link is up using ", hp->dev->name);
591 if (hp->tcvr_type == external)
592 printk("external ");
593 else
594 printk("internal ");
595 printk("transceiver at ");
596 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
597 if (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) {
598 if (hp->sw_lpa & LPA_100FULL)
599 printk("100Mb/s, Full Duplex.\n");
600 else
601 printk("100Mb/s, Half Duplex.\n");
602 } else {
603 if (hp->sw_lpa & LPA_10FULL)
604 printk("10Mb/s, Full Duplex.\n");
605 else
606 printk("10Mb/s, Half Duplex.\n");
607 }
608 }
609
610 static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
611 {
612 printk(KERN_INFO "%s: Link has been forced up using ", hp->dev->name);
613 if (hp->tcvr_type == external)
614 printk("external ");
615 else
616 printk("internal ");
617 printk("transceiver at ");
618 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
619 if (hp->sw_bmcr & BMCR_SPEED100)
620 printk("100Mb/s, ");
621 else
622 printk("10Mb/s, ");
623 if (hp->sw_bmcr & BMCR_FULLDPLX)
624 printk("Full Duplex.\n");
625 else
626 printk("Half Duplex.\n");
627 }
628
629 static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
630 {
631 int full;
632
633 /* All we care about is making sure the bigmac tx_cfg has a
634 * proper duplex setting.
635 */
636 if (hp->timer_state == arbwait) {
637 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
638 if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
639 goto no_response;
640 if (hp->sw_lpa & LPA_100FULL)
641 full = 1;
642 else if (hp->sw_lpa & LPA_100HALF)
643 full = 0;
644 else if (hp->sw_lpa & LPA_10FULL)
645 full = 1;
646 else
647 full = 0;
648 } else {
649 /* Forcing a link mode. */
650 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
651 if (hp->sw_bmcr & BMCR_FULLDPLX)
652 full = 1;
653 else
654 full = 0;
655 }
656
657 /* Before changing other bits in the tx_cfg register, and in
658 * general any of other the TX config registers too, you
659 * must:
660 * 1) Clear Enable
661 * 2) Poll with reads until that bit reads back as zero
662 * 3) Make TX configuration changes
663 * 4) Set Enable once more
664 */
665 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
666 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
667 ~(BIGMAC_TXCFG_ENABLE));
668 while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
669 barrier();
670 if (full) {
671 hp->happy_flags |= HFLAG_FULL;
672 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
673 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
674 BIGMAC_TXCFG_FULLDPLX);
675 } else {
676 hp->happy_flags &= ~(HFLAG_FULL);
677 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
678 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
679 ~(BIGMAC_TXCFG_FULLDPLX));
680 }
681 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
682 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
683 BIGMAC_TXCFG_ENABLE);
684 return 0;
685 no_response:
686 return 1;
687 }
688
689 static int happy_meal_init(struct happy_meal *hp);
690
691 static int is_lucent_phy(struct happy_meal *hp)
692 {
693 void __iomem *tregs = hp->tcvregs;
694 unsigned short mr2, mr3;
695 int ret = 0;
696
697 mr2 = happy_meal_tcvr_read(hp, tregs, 2);
698 mr3 = happy_meal_tcvr_read(hp, tregs, 3);
699 if ((mr2 & 0xffff) == 0x0180 &&
700 ((mr3 & 0xffff) >> 10) == 0x1d)
701 ret = 1;
702
703 return ret;
704 }
705
706 static void happy_meal_timer(unsigned long data)
707 {
708 struct happy_meal *hp = (struct happy_meal *) data;
709 void __iomem *tregs = hp->tcvregs;
710 int restart_timer = 0;
711
712 spin_lock_irq(&hp->happy_lock);
713
714 hp->timer_ticks++;
715 switch(hp->timer_state) {
716 case arbwait:
717 /* Only allow for 5 ticks, thats 10 seconds and much too
718 * long to wait for arbitration to complete.
719 */
720 if (hp->timer_ticks >= 10) {
721 /* Enter force mode. */
722 do_force_mode:
723 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
724 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
725 hp->dev->name);
726 hp->sw_bmcr = BMCR_SPEED100;
727 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
728
729 if (!is_lucent_phy(hp)) {
730 /* OK, seems we need do disable the transceiver for the first
731 * tick to make sure we get an accurate link state at the
732 * second tick.
733 */
734 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
735 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
736 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
737 }
738 hp->timer_state = ltrywait;
739 hp->timer_ticks = 0;
740 restart_timer = 1;
741 } else {
742 /* Anything interesting happen? */
743 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
744 if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
745 int ret;
746
747 /* Just what we've been waiting for... */
748 ret = set_happy_link_modes(hp, tregs);
749 if (ret) {
750 /* Ooops, something bad happened, go to force
751 * mode.
752 *
753 * XXX Broken hubs which don't support 802.3u
754 * XXX auto-negotiation make this happen as well.
755 */
756 goto do_force_mode;
757 }
758
759 /* Success, at least so far, advance our state engine. */
760 hp->timer_state = lupwait;
761 restart_timer = 1;
762 } else {
763 restart_timer = 1;
764 }
765 }
766 break;
767
768 case lupwait:
769 /* Auto negotiation was successful and we are awaiting a
770 * link up status. I have decided to let this timer run
771 * forever until some sort of error is signalled, reporting
772 * a message to the user at 10 second intervals.
773 */
774 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
775 if (hp->sw_bmsr & BMSR_LSTATUS) {
776 /* Wheee, it's up, display the link mode in use and put
777 * the timer to sleep.
778 */
779 display_link_mode(hp, tregs);
780 hp->timer_state = asleep;
781 restart_timer = 0;
782 } else {
783 if (hp->timer_ticks >= 10) {
784 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
785 "not completely up.\n", hp->dev->name);
786 hp->timer_ticks = 0;
787 restart_timer = 1;
788 } else {
789 restart_timer = 1;
790 }
791 }
792 break;
793
794 case ltrywait:
795 /* Making the timeout here too long can make it take
796 * annoyingly long to attempt all of the link mode
797 * permutations, but then again this is essentially
798 * error recovery code for the most part.
799 */
800 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
801 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
802 if (hp->timer_ticks == 1) {
803 if (!is_lucent_phy(hp)) {
804 /* Re-enable transceiver, we'll re-enable the transceiver next
805 * tick, then check link state on the following tick.
806 */
807 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
808 happy_meal_tcvr_write(hp, tregs,
809 DP83840_CSCONFIG, hp->sw_csconfig);
810 }
811 restart_timer = 1;
812 break;
813 }
814 if (hp->timer_ticks == 2) {
815 if (!is_lucent_phy(hp)) {
816 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
817 happy_meal_tcvr_write(hp, tregs,
818 DP83840_CSCONFIG, hp->sw_csconfig);
819 }
820 restart_timer = 1;
821 break;
822 }
823 if (hp->sw_bmsr & BMSR_LSTATUS) {
824 /* Force mode selection success. */
825 display_forced_link_mode(hp, tregs);
826 set_happy_link_modes(hp, tregs); /* XXX error? then what? */
827 hp->timer_state = asleep;
828 restart_timer = 0;
829 } else {
830 if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
831 int ret;
832
833 ret = try_next_permutation(hp, tregs);
834 if (ret == -1) {
835 /* Aieee, tried them all, reset the
836 * chip and try all over again.
837 */
838
839 /* Let the user know... */
840 printk(KERN_NOTICE "%s: Link down, cable problem?\n",
841 hp->dev->name);
842
843 ret = happy_meal_init(hp);
844 if (ret) {
845 /* ho hum... */
846 printk(KERN_ERR "%s: Error, cannot re-init the "
847 "Happy Meal.\n", hp->dev->name);
848 }
849 goto out;
850 }
851 if (!is_lucent_phy(hp)) {
852 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
853 DP83840_CSCONFIG);
854 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
855 happy_meal_tcvr_write(hp, tregs,
856 DP83840_CSCONFIG, hp->sw_csconfig);
857 }
858 hp->timer_ticks = 0;
859 restart_timer = 1;
860 } else {
861 restart_timer = 1;
862 }
863 }
864 break;
865
866 case asleep:
867 default:
868 /* Can't happens.... */
869 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
870 hp->dev->name);
871 restart_timer = 0;
872 hp->timer_ticks = 0;
873 hp->timer_state = asleep; /* foo on you */
874 break;
875 };
876
877 if (restart_timer) {
878 hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
879 add_timer(&hp->happy_timer);
880 }
881
882 out:
883 spin_unlock_irq(&hp->happy_lock);
884 }
885
886 #define TX_RESET_TRIES 32
887 #define RX_RESET_TRIES 32
888
889 /* hp->happy_lock must be held */
890 static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
891 {
892 int tries = TX_RESET_TRIES;
893
894 HMD(("happy_meal_tx_reset: reset, "));
895
896 /* Would you like to try our SMCC Delux? */
897 hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
898 while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
899 udelay(20);
900
901 /* Lettuce, tomato, buggy hardware (no extra charge)? */
902 if (!tries)
903 printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");
904
905 /* Take care. */
906 HMD(("done\n"));
907 }
908
909 /* hp->happy_lock must be held */
910 static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
911 {
912 int tries = RX_RESET_TRIES;
913
914 HMD(("happy_meal_rx_reset: reset, "));
915
916 /* We have a special on GNU/Viking hardware bugs today. */
917 hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
918 while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
919 udelay(20);
920
921 /* Will that be all? */
922 if (!tries)
923 printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");
924
925 /* Don't forget your vik_1137125_wa. Have a nice day. */
926 HMD(("done\n"));
927 }
928
929 #define STOP_TRIES 16
930
931 /* hp->happy_lock must be held */
932 static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
933 {
934 int tries = STOP_TRIES;
935
936 HMD(("happy_meal_stop: reset, "));
937
938 /* We're consolidating our STB products, it's your lucky day. */
939 hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
940 while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
941 udelay(20);
942
943 /* Come back next week when we are "Sun Microelectronics". */
944 if (!tries)
945 printk(KERN_ERR "happy meal: Fry guys.");
946
947 /* Remember: "Different name, same old buggy as shit hardware." */
948 HMD(("done\n"));
949 }
950
951 /* hp->happy_lock must be held */
952 static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
953 {
954 struct net_device_stats *stats = &hp->net_stats;
955
956 stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
957 hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
958
959 stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
960 hme_write32(hp, bregs + BMAC_UNALECTR, 0);
961
962 stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
963 hme_write32(hp, bregs + BMAC_GLECTR, 0);
964
965 stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
966
967 stats->collisions +=
968 (hme_read32(hp, bregs + BMAC_EXCTR) +
969 hme_read32(hp, bregs + BMAC_LTCTR));
970 hme_write32(hp, bregs + BMAC_EXCTR, 0);
971 hme_write32(hp, bregs + BMAC_LTCTR, 0);
972 }
973
974 /* hp->happy_lock must be held */
975 static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
976 {
977 ASD(("happy_meal_poll_stop: "));
978
979 /* If polling disabled or not polling already, nothing to do. */
980 if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
981 (HFLAG_POLLENABLE | HFLAG_POLL)) {
982 HMD(("not polling, return\n"));
983 return;
984 }
985
986 /* Shut up the MIF. */
987 ASD(("were polling, mif ints off, "));
988 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
989
990 /* Turn off polling. */
991 ASD(("polling off, "));
992 hme_write32(hp, tregs + TCVR_CFG,
993 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
994
995 /* We are no longer polling. */
996 hp->happy_flags &= ~(HFLAG_POLL);
997
998 /* Let the bits set. */
999 udelay(200);
1000 ASD(("done\n"));
1001 }
1002
1003 /* Only Sun can take such nice parts and fuck up the programming interface
1004 * like this. Good job guys...
1005 */
1006 #define TCVR_RESET_TRIES 16 /* It should reset quickly */
1007 #define TCVR_UNISOLATE_TRIES 32 /* Dis-isolation can take longer. */
1008
1009 /* hp->happy_lock must be held */
1010 static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
1011 {
1012 u32 tconfig;
1013 int result, tries = TCVR_RESET_TRIES;
1014
1015 tconfig = hme_read32(hp, tregs + TCVR_CFG);
1016 ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
1017 if (hp->tcvr_type == external) {
1018 ASD(("external<"));
1019 hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
1020 hp->tcvr_type = internal;
1021 hp->paddr = TCV_PADDR_ITX;
1022 ASD(("ISOLATE,"));
1023 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1024 (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1025 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1026 if (result == TCVR_FAILURE) {
1027 ASD(("phyread_fail>\n"));
1028 return -1;
1029 }
1030 ASD(("phyread_ok,PSELECT>"));
1031 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1032 hp->tcvr_type = external;
1033 hp->paddr = TCV_PADDR_ETX;
1034 } else {
1035 if (tconfig & TCV_CFG_MDIO1) {
1036 ASD(("internal<PSELECT,"));
1037 hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
1038 ASD(("ISOLATE,"));
1039 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1040 (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1041 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1042 if (result == TCVR_FAILURE) {
1043 ASD(("phyread_fail>\n"));
1044 return -1;
1045 }
1046 ASD(("phyread_ok,~PSELECT>"));
1047 hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
1048 hp->tcvr_type = internal;
1049 hp->paddr = TCV_PADDR_ITX;
1050 }
1051 }
1052
1053 ASD(("BMCR_RESET "));
1054 happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
1055
1056 while (--tries) {
1057 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1058 if (result == TCVR_FAILURE)
1059 return -1;
1060 hp->sw_bmcr = result;
1061 if (!(result & BMCR_RESET))
1062 break;
1063 udelay(20);
1064 }
1065 if (!tries) {
1066 ASD(("BMCR RESET FAILED!\n"));
1067 return -1;
1068 }
1069 ASD(("RESET_OK\n"));
1070
1071 /* Get fresh copies of the PHY registers. */
1072 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1073 hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1074 hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1075 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1076
1077 ASD(("UNISOLATE"));
1078 hp->sw_bmcr &= ~(BMCR_ISOLATE);
1079 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1080
1081 tries = TCVR_UNISOLATE_TRIES;
1082 while (--tries) {
1083 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1084 if (result == TCVR_FAILURE)
1085 return -1;
1086 if (!(result & BMCR_ISOLATE))
1087 break;
1088 udelay(20);
1089 }
1090 if (!tries) {
1091 ASD((" FAILED!\n"));
1092 return -1;
1093 }
1094 ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
1095 if (!is_lucent_phy(hp)) {
1096 result = happy_meal_tcvr_read(hp, tregs,
1097 DP83840_CSCONFIG);
1098 happy_meal_tcvr_write(hp, tregs,
1099 DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
1100 }
1101 return 0;
1102 }
1103
1104 /* Figure out whether we have an internal or external transceiver.
1105 *
1106 * hp->happy_lock must be held
1107 */
1108 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
1109 {
1110 unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
1111
1112 ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
1113 if (hp->happy_flags & HFLAG_POLL) {
1114 /* If we are polling, we must stop to get the transceiver type. */
1115 ASD(("<polling> "));
1116 if (hp->tcvr_type == internal) {
1117 if (tconfig & TCV_CFG_MDIO1) {
1118 ASD(("<internal> <poll stop> "));
1119 happy_meal_poll_stop(hp, tregs);
1120 hp->paddr = TCV_PADDR_ETX;
1121 hp->tcvr_type = external;
1122 ASD(("<external>\n"));
1123 tconfig &= ~(TCV_CFG_PENABLE);
1124 tconfig |= TCV_CFG_PSELECT;
1125 hme_write32(hp, tregs + TCVR_CFG, tconfig);
1126 }
1127 } else {
1128 if (hp->tcvr_type == external) {
1129 ASD(("<external> "));
1130 if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
1131 ASD(("<poll stop> "));
1132 happy_meal_poll_stop(hp, tregs);
1133 hp->paddr = TCV_PADDR_ITX;
1134 hp->tcvr_type = internal;
1135 ASD(("<internal>\n"));
1136 hme_write32(hp, tregs + TCVR_CFG,
1137 hme_read32(hp, tregs + TCVR_CFG) &
1138 ~(TCV_CFG_PSELECT));
1139 }
1140 ASD(("\n"));
1141 } else {
1142 ASD(("<none>\n"));
1143 }
1144 }
1145 } else {
1146 u32 reread = hme_read32(hp, tregs + TCVR_CFG);
1147
1148 /* Else we can just work off of the MDIO bits. */
1149 ASD(("<not polling> "));
1150 if (reread & TCV_CFG_MDIO1) {
1151 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1152 hp->paddr = TCV_PADDR_ETX;
1153 hp->tcvr_type = external;
1154 ASD(("<external>\n"));
1155 } else {
1156 if (reread & TCV_CFG_MDIO0) {
1157 hme_write32(hp, tregs + TCVR_CFG,
1158 tconfig & ~(TCV_CFG_PSELECT));
1159 hp->paddr = TCV_PADDR_ITX;
1160 hp->tcvr_type = internal;
1161 ASD(("<internal>\n"));
1162 } else {
1163 printk(KERN_ERR "happy meal: Transceiver and a coke please.");
1164 hp->tcvr_type = none; /* Grrr... */
1165 ASD(("<none>\n"));
1166 }
1167 }
1168 }
1169 }
1170
1171 /* The receive ring buffers are a bit tricky to get right. Here goes...
1172 *
1173 * The buffers we dma into must be 64 byte aligned. So we use a special
1174 * alloc_skb() routine for the happy meal to allocate 64 bytes more than
1175 * we really need.
1176 *
1177 * We use skb_reserve() to align the data block we get in the skb. We
1178 * also program the etxregs->cfg register to use an offset of 2. This
1179 * imperical constant plus the ethernet header size will always leave
1180 * us with a nicely aligned ip header once we pass things up to the
1181 * protocol layers.
1182 *
1183 * The numbers work out to:
1184 *
1185 * Max ethernet frame size 1518
1186 * Ethernet header size 14
1187 * Happy Meal base offset 2
1188 *
1189 * Say a skb data area is at 0xf001b010, and its size alloced is
1190 * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
1191 *
1192 * First our alloc_skb() routine aligns the data base to a 64 byte
1193 * boundary. We now have 0xf001b040 as our skb data address. We
1194 * plug this into the receive descriptor address.
1195 *
1196 * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
1197 * So now the data we will end up looking at starts at 0xf001b042. When
1198 * the packet arrives, we will check out the size received and subtract
1199 * this from the skb->length. Then we just pass the packet up to the
1200 * protocols as is, and allocate a new skb to replace this slot we have
1201 * just received from.
1202 *
1203 * The ethernet layer will strip the ether header from the front of the
1204 * skb we just sent to it, this leaves us with the ip header sitting
1205 * nicely aligned at 0xf001b050. Also, for tcp and udp packets the
1206 * Happy Meal has even checksummed the tcp/udp data for us. The 16
1207 * bit checksum is obtained from the low bits of the receive descriptor
1208 * flags, thus:
1209 *
1210 * skb->csum = rxd->rx_flags & 0xffff;
1211 * skb->ip_summed = CHECKSUM_COMPLETE;
1212 *
1213 * before sending off the skb to the protocols, and we are good as gold.
1214 */
1215 static void happy_meal_clean_rings(struct happy_meal *hp)
1216 {
1217 int i;
1218
1219 for (i = 0; i < RX_RING_SIZE; i++) {
1220 if (hp->rx_skbs[i] != NULL) {
1221 struct sk_buff *skb = hp->rx_skbs[i];
1222 struct happy_meal_rxd *rxd;
1223 u32 dma_addr;
1224
1225 rxd = &hp->happy_block->happy_meal_rxd[i];
1226 dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
1227 hme_dma_unmap(hp, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROMDEVICE);
1228 dev_kfree_skb_any(skb);
1229 hp->rx_skbs[i] = NULL;
1230 }
1231 }
1232
1233 for (i = 0; i < TX_RING_SIZE; i++) {
1234 if (hp->tx_skbs[i] != NULL) {
1235 struct sk_buff *skb = hp->tx_skbs[i];
1236 struct happy_meal_txd *txd;
1237 u32 dma_addr;
1238 int frag;
1239
1240 hp->tx_skbs[i] = NULL;
1241
1242 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1243 txd = &hp->happy_block->happy_meal_txd[i];
1244 dma_addr = hme_read_desc32(hp, &txd->tx_addr);
1245 hme_dma_unmap(hp, dma_addr,
1246 (hme_read_desc32(hp, &txd->tx_flags)
1247 & TXFLAG_SIZE),
1248 DMA_TODEVICE);
1249
1250 if (frag != skb_shinfo(skb)->nr_frags)
1251 i++;
1252 }
1253
1254 dev_kfree_skb_any(skb);
1255 }
1256 }
1257 }
1258
1259 /* hp->happy_lock must be held */
1260 static void happy_meal_init_rings(struct happy_meal *hp)
1261 {
1262 struct hmeal_init_block *hb = hp->happy_block;
1263 struct net_device *dev = hp->dev;
1264 int i;
1265
1266 HMD(("happy_meal_init_rings: counters to zero, "));
1267 hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
1268
1269 /* Free any skippy bufs left around in the rings. */
1270 HMD(("clean, "));
1271 happy_meal_clean_rings(hp);
1272
1273 /* Now get new skippy bufs for the receive ring. */
1274 HMD(("init rxring, "));
1275 for (i = 0; i < RX_RING_SIZE; i++) {
1276 struct sk_buff *skb;
1277
1278 skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
1279 if (!skb) {
1280 hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
1281 continue;
1282 }
1283 hp->rx_skbs[i] = skb;
1284 skb->dev = dev;
1285
1286 /* Because we reserve afterwards. */
1287 skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
1288 hme_write_rxd(hp, &hb->happy_meal_rxd[i],
1289 (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
1290 hme_dma_map(hp, skb->data, RX_BUF_ALLOC_SIZE, DMA_FROMDEVICE));
1291 skb_reserve(skb, RX_OFFSET);
1292 }
1293
1294 HMD(("init txring, "));
1295 for (i = 0; i < TX_RING_SIZE; i++)
1296 hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
1297
1298 HMD(("done\n"));
1299 }
1300
1301 /* hp->happy_lock must be held */
1302 static void happy_meal_begin_auto_negotiation(struct happy_meal *hp,
1303 void __iomem *tregs,
1304 struct ethtool_cmd *ep)
1305 {
1306 int timeout;
1307
1308 /* Read all of the registers we are interested in now. */
1309 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1310 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1311 hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1312 hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1313
1314 /* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
1315
1316 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1317 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1318 /* Advertise everything we can support. */
1319 if (hp->sw_bmsr & BMSR_10HALF)
1320 hp->sw_advertise |= (ADVERTISE_10HALF);
1321 else
1322 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1323
1324 if (hp->sw_bmsr & BMSR_10FULL)
1325 hp->sw_advertise |= (ADVERTISE_10FULL);
1326 else
1327 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1328 if (hp->sw_bmsr & BMSR_100HALF)
1329 hp->sw_advertise |= (ADVERTISE_100HALF);
1330 else
1331 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1332 if (hp->sw_bmsr & BMSR_100FULL)
1333 hp->sw_advertise |= (ADVERTISE_100FULL);
1334 else
1335 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1336 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1337
1338 /* XXX Currently no Happy Meal cards I know off support 100BaseT4,
1339 * XXX and this is because the DP83840 does not support it, changes
1340 * XXX would need to be made to the tx/rx logic in the driver as well
1341 * XXX so I completely skip checking for it in the BMSR for now.
1342 */
1343
1344 #ifdef AUTO_SWITCH_DEBUG
1345 ASD(("%s: Advertising [ ", hp->dev->name));
1346 if (hp->sw_advertise & ADVERTISE_10HALF)
1347 ASD(("10H "));
1348 if (hp->sw_advertise & ADVERTISE_10FULL)
1349 ASD(("10F "));
1350 if (hp->sw_advertise & ADVERTISE_100HALF)
1351 ASD(("100H "));
1352 if (hp->sw_advertise & ADVERTISE_100FULL)
1353 ASD(("100F "));
1354 #endif
1355
1356 /* Enable Auto-Negotiation, this is usually on already... */
1357 hp->sw_bmcr |= BMCR_ANENABLE;
1358 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1359
1360 /* Restart it to make sure it is going. */
1361 hp->sw_bmcr |= BMCR_ANRESTART;
1362 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1363
1364 /* BMCR_ANRESTART self clears when the process has begun. */
1365
1366 timeout = 64; /* More than enough. */
1367 while (--timeout) {
1368 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1369 if (!(hp->sw_bmcr & BMCR_ANRESTART))
1370 break; /* got it. */
1371 udelay(10);
1372 }
1373 if (!timeout) {
1374 printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
1375 "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
1376 printk(KERN_NOTICE "%s: Performing force link detection.\n",
1377 hp->dev->name);
1378 goto force_link;
1379 } else {
1380 hp->timer_state = arbwait;
1381 }
1382 } else {
1383 force_link:
1384 /* Force the link up, trying first a particular mode.
1385 * Either we are here at the request of ethtool or
1386 * because the Happy Meal would not start to autoneg.
1387 */
1388
1389 /* Disable auto-negotiation in BMCR, enable the duplex and
1390 * speed setting, init the timer state machine, and fire it off.
1391 */
1392 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1393 hp->sw_bmcr = BMCR_SPEED100;
1394 } else {
1395 if (ep->speed == SPEED_100)
1396 hp->sw_bmcr = BMCR_SPEED100;
1397 else
1398 hp->sw_bmcr = 0;
1399 if (ep->duplex == DUPLEX_FULL)
1400 hp->sw_bmcr |= BMCR_FULLDPLX;
1401 }
1402 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1403
1404 if (!is_lucent_phy(hp)) {
1405 /* OK, seems we need do disable the transceiver for the first
1406 * tick to make sure we get an accurate link state at the
1407 * second tick.
1408 */
1409 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
1410 DP83840_CSCONFIG);
1411 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
1412 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
1413 hp->sw_csconfig);
1414 }
1415 hp->timer_state = ltrywait;
1416 }
1417
1418 hp->timer_ticks = 0;
1419 hp->happy_timer.expires = jiffies + (12 * HZ)/10; /* 1.2 sec. */
1420 hp->happy_timer.data = (unsigned long) hp;
1421 hp->happy_timer.function = &happy_meal_timer;
1422 add_timer(&hp->happy_timer);
1423 }
1424
1425 /* hp->happy_lock must be held */
1426 static int happy_meal_init(struct happy_meal *hp)
1427 {
1428 void __iomem *gregs = hp->gregs;
1429 void __iomem *etxregs = hp->etxregs;
1430 void __iomem *erxregs = hp->erxregs;
1431 void __iomem *bregs = hp->bigmacregs;
1432 void __iomem *tregs = hp->tcvregs;
1433 u32 regtmp, rxcfg;
1434 unsigned char *e = &hp->dev->dev_addr[0];
1435
1436 /* If auto-negotiation timer is running, kill it. */
1437 del_timer(&hp->happy_timer);
1438
1439 HMD(("happy_meal_init: happy_flags[%08x] ",
1440 hp->happy_flags));
1441 if (!(hp->happy_flags & HFLAG_INIT)) {
1442 HMD(("set HFLAG_INIT, "));
1443 hp->happy_flags |= HFLAG_INIT;
1444 happy_meal_get_counters(hp, bregs);
1445 }
1446
1447 /* Stop polling. */
1448 HMD(("to happy_meal_poll_stop\n"));
1449 happy_meal_poll_stop(hp, tregs);
1450
1451 /* Stop transmitter and receiver. */
1452 HMD(("happy_meal_init: to happy_meal_stop\n"));
1453 happy_meal_stop(hp, gregs);
1454
1455 /* Alloc and reset the tx/rx descriptor chains. */
1456 HMD(("happy_meal_init: to happy_meal_init_rings\n"));
1457 happy_meal_init_rings(hp);
1458
1459 /* Shut up the MIF. */
1460 HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
1461 hme_read32(hp, tregs + TCVR_IMASK)));
1462 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1463
1464 /* See if we can enable the MIF frame on this card to speak to the DP83840. */
1465 if (hp->happy_flags & HFLAG_FENABLE) {
1466 HMD(("use frame old[%08x], ",
1467 hme_read32(hp, tregs + TCVR_CFG)));
1468 hme_write32(hp, tregs + TCVR_CFG,
1469 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1470 } else {
1471 HMD(("use bitbang old[%08x], ",
1472 hme_read32(hp, tregs + TCVR_CFG)));
1473 hme_write32(hp, tregs + TCVR_CFG,
1474 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1475 }
1476
1477 /* Check the state of the transceiver. */
1478 HMD(("to happy_meal_transceiver_check\n"));
1479 happy_meal_transceiver_check(hp, tregs);
1480
1481 /* Put the Big Mac into a sane state. */
1482 HMD(("happy_meal_init: "));
1483 switch(hp->tcvr_type) {
1484 case none:
1485 /* Cannot operate if we don't know the transceiver type! */
1486 HMD(("AAIEEE no transceiver type, EAGAIN"));
1487 return -EAGAIN;
1488
1489 case internal:
1490 /* Using the MII buffers. */
1491 HMD(("internal, using MII, "));
1492 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1493 break;
1494
1495 case external:
1496 /* Not using the MII, disable it. */
1497 HMD(("external, disable MII, "));
1498 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1499 break;
1500 };
1501
1502 if (happy_meal_tcvr_reset(hp, tregs))
1503 return -EAGAIN;
1504
1505 /* Reset the Happy Meal Big Mac transceiver and the receiver. */
1506 HMD(("tx/rx reset, "));
1507 happy_meal_tx_reset(hp, bregs);
1508 happy_meal_rx_reset(hp, bregs);
1509
1510 /* Set jam size and inter-packet gaps to reasonable defaults. */
1511 HMD(("jsize/ipg1/ipg2, "));
1512 hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
1513 hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
1514 hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
1515
1516 /* Load up the MAC address and random seed. */
1517 HMD(("rseed/macaddr, "));
1518
1519 /* The docs recommend to use the 10LSB of our MAC here. */
1520 hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
1521
1522 hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
1523 hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
1524 hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
1525
1526 HMD(("htable, "));
1527 if ((hp->dev->flags & IFF_ALLMULTI) ||
1528 (hp->dev->mc_count > 64)) {
1529 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
1530 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
1531 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
1532 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
1533 } else if ((hp->dev->flags & IFF_PROMISC) == 0) {
1534 u16 hash_table[4];
1535 struct dev_mc_list *dmi = hp->dev->mc_list;
1536 char *addrs;
1537 int i;
1538 u32 crc;
1539
1540 for (i = 0; i < 4; i++)
1541 hash_table[i] = 0;
1542
1543 for (i = 0; i < hp->dev->mc_count; i++) {
1544 addrs = dmi->dmi_addr;
1545 dmi = dmi->next;
1546
1547 if (!(*addrs & 1))
1548 continue;
1549
1550 crc = ether_crc_le(6, addrs);
1551 crc >>= 26;
1552 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1553 }
1554 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
1555 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
1556 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
1557 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
1558 } else {
1559 hme_write32(hp, bregs + BMAC_HTABLE3, 0);
1560 hme_write32(hp, bregs + BMAC_HTABLE2, 0);
1561 hme_write32(hp, bregs + BMAC_HTABLE1, 0);
1562 hme_write32(hp, bregs + BMAC_HTABLE0, 0);
1563 }
1564
1565 /* Set the RX and TX ring ptrs. */
1566 HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
1567 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
1568 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
1569 hme_write32(hp, erxregs + ERX_RING,
1570 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
1571 hme_write32(hp, etxregs + ETX_RING,
1572 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
1573
1574 /* Parity issues in the ERX unit of some HME revisions can cause some
1575 * registers to not be written unless their parity is even. Detect such
1576 * lost writes and simply rewrite with a low bit set (which will be ignored
1577 * since the rxring needs to be 2K aligned).
1578 */
1579 if (hme_read32(hp, erxregs + ERX_RING) !=
1580 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
1581 hme_write32(hp, erxregs + ERX_RING,
1582 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
1583 | 0x4);
1584
1585 /* Set the supported burst sizes. */
1586 HMD(("happy_meal_init: old[%08x] bursts<",
1587 hme_read32(hp, gregs + GREG_CFG)));
1588
1589 #ifndef CONFIG_SPARC
1590 /* It is always PCI and can handle 64byte bursts. */
1591 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
1592 #else
1593 if ((hp->happy_bursts & DMA_BURST64) &&
1594 ((hp->happy_flags & HFLAG_PCI) != 0
1595 #ifdef CONFIG_SBUS
1596 || sbus_can_burst64(hp->happy_dev)
1597 #endif
1598 || 0)) {
1599 u32 gcfg = GREG_CFG_BURST64;
1600
1601 /* I have no idea if I should set the extended
1602 * transfer mode bit for Cheerio, so for now I
1603 * do not. -DaveM
1604 */
1605 #ifdef CONFIG_SBUS
1606 if ((hp->happy_flags & HFLAG_PCI) == 0 &&
1607 sbus_can_dma_64bit(hp->happy_dev)) {
1608 sbus_set_sbus64(hp->happy_dev,
1609 hp->happy_bursts);
1610 gcfg |= GREG_CFG_64BIT;
1611 }
1612 #endif
1613
1614 HMD(("64>"));
1615 hme_write32(hp, gregs + GREG_CFG, gcfg);
1616 } else if (hp->happy_bursts & DMA_BURST32) {
1617 HMD(("32>"));
1618 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
1619 } else if (hp->happy_bursts & DMA_BURST16) {
1620 HMD(("16>"));
1621 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
1622 } else {
1623 HMD(("XXX>"));
1624 hme_write32(hp, gregs + GREG_CFG, 0);
1625 }
1626 #endif /* CONFIG_SPARC */
1627
1628 /* Turn off interrupts we do not want to hear. */
1629 HMD((", enable global interrupts, "));
1630 hme_write32(hp, gregs + GREG_IMASK,
1631 (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
1632 GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
1633
1634 /* Set the transmit ring buffer size. */
1635 HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
1636 hme_read32(hp, etxregs + ETX_RSIZE)));
1637 hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
1638
1639 /* Enable transmitter DVMA. */
1640 HMD(("tx dma enable old[%08x], ",
1641 hme_read32(hp, etxregs + ETX_CFG)));
1642 hme_write32(hp, etxregs + ETX_CFG,
1643 hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
1644
1645 /* This chip really rots, for the receiver sometimes when you
1646 * write to its control registers not all the bits get there
1647 * properly. I cannot think of a sane way to provide complete
1648 * coverage for this hardware bug yet.
1649 */
1650 HMD(("erx regs bug old[%08x]\n",
1651 hme_read32(hp, erxregs + ERX_CFG)));
1652 hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1653 regtmp = hme_read32(hp, erxregs + ERX_CFG);
1654 hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1655 if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
1656 printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
1657 printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
1658 ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
1659 /* XXX Should return failure here... */
1660 }
1661
1662 /* Enable Big Mac hash table filter. */
1663 HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
1664 hme_read32(hp, bregs + BMAC_RXCFG)));
1665 rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
1666 if (hp->dev->flags & IFF_PROMISC)
1667 rxcfg |= BIGMAC_RXCFG_PMISC;
1668 hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
1669
1670 /* Let the bits settle in the chip. */
1671 udelay(10);
1672
1673 /* Ok, configure the Big Mac transmitter. */
1674 HMD(("BIGMAC init, "));
1675 regtmp = 0;
1676 if (hp->happy_flags & HFLAG_FULL)
1677 regtmp |= BIGMAC_TXCFG_FULLDPLX;
1678
1679 /* Don't turn on the "don't give up" bit for now. It could cause hme
1680 * to deadlock with the PHY if a Jabber occurs.
1681 */
1682 hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
1683
1684 /* Give up after 16 TX attempts. */
1685 hme_write32(hp, bregs + BMAC_ALIMIT, 16);
1686
1687 /* Enable the output drivers no matter what. */
1688 regtmp = BIGMAC_XCFG_ODENABLE;
1689
1690 /* If card can do lance mode, enable it. */
1691 if (hp->happy_flags & HFLAG_LANCE)
1692 regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
1693
1694 /* Disable the MII buffers if using external transceiver. */
1695 if (hp->tcvr_type == external)
1696 regtmp |= BIGMAC_XCFG_MIIDISAB;
1697
1698 HMD(("XIF config old[%08x], ",
1699 hme_read32(hp, bregs + BMAC_XIFCFG)));
1700 hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
1701
1702 /* Start things up. */
1703 HMD(("tx old[%08x] and rx [%08x] ON!\n",
1704 hme_read32(hp, bregs + BMAC_TXCFG),
1705 hme_read32(hp, bregs + BMAC_RXCFG)));
1706
1707 /* Set larger TX/RX size to allow for 802.1q */
1708 hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
1709 hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
1710
1711 hme_write32(hp, bregs + BMAC_TXCFG,
1712 hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
1713 hme_write32(hp, bregs + BMAC_RXCFG,
1714 hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
1715
1716 /* Get the autonegotiation started, and the watch timer ticking. */
1717 happy_meal_begin_auto_negotiation(hp, tregs, NULL);
1718
1719 /* Success. */
1720 return 0;
1721 }
1722
1723 /* hp->happy_lock must be held */
1724 static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
1725 {
1726 void __iomem *tregs = hp->tcvregs;
1727 void __iomem *bregs = hp->bigmacregs;
1728 void __iomem *gregs = hp->gregs;
1729
1730 happy_meal_stop(hp, gregs);
1731 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1732 if (hp->happy_flags & HFLAG_FENABLE)
1733 hme_write32(hp, tregs + TCVR_CFG,
1734 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1735 else
1736 hme_write32(hp, tregs + TCVR_CFG,
1737 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1738 happy_meal_transceiver_check(hp, tregs);
1739 switch(hp->tcvr_type) {
1740 case none:
1741 return;
1742 case internal:
1743 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1744 break;
1745 case external:
1746 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1747 break;
1748 };
1749 if (happy_meal_tcvr_reset(hp, tregs))
1750 return;
1751
1752 /* Latch PHY registers as of now. */
1753 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1754 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1755
1756 /* Advertise everything we can support. */
1757 if (hp->sw_bmsr & BMSR_10HALF)
1758 hp->sw_advertise |= (ADVERTISE_10HALF);
1759 else
1760 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1761
1762 if (hp->sw_bmsr & BMSR_10FULL)
1763 hp->sw_advertise |= (ADVERTISE_10FULL);
1764 else
1765 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1766 if (hp->sw_bmsr & BMSR_100HALF)
1767 hp->sw_advertise |= (ADVERTISE_100HALF);
1768 else
1769 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1770 if (hp->sw_bmsr & BMSR_100FULL)
1771 hp->sw_advertise |= (ADVERTISE_100FULL);
1772 else
1773 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1774
1775 /* Update the PHY advertisement register. */
1776 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1777 }
1778
1779 /* Once status is latched (by happy_meal_interrupt) it is cleared by
1780 * the hardware, so we cannot re-read it and get a correct value.
1781 *
1782 * hp->happy_lock must be held
1783 */
1784 static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
1785 {
1786 int reset = 0;
1787
1788 /* Only print messages for non-counter related interrupts. */
1789 if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
1790 GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
1791 GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
1792 GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
1793 GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
1794 GREG_STAT_SLVPERR))
1795 printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
1796 hp->dev->name, status);
1797
1798 if (status & GREG_STAT_RFIFOVF) {
1799 /* Receive FIFO overflow is harmless and the hardware will take
1800 care of it, just some packets are lost. Who cares. */
1801 printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
1802 }
1803
1804 if (status & GREG_STAT_STSTERR) {
1805 /* BigMAC SQE link test failed. */
1806 printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
1807 reset = 1;
1808 }
1809
1810 if (status & GREG_STAT_TFIFO_UND) {
1811 /* Transmit FIFO underrun, again DMA error likely. */
1812 printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
1813 hp->dev->name);
1814 reset = 1;
1815 }
1816
1817 if (status & GREG_STAT_MAXPKTERR) {
1818 /* Driver error, tried to transmit something larger
1819 * than ethernet max mtu.
1820 */
1821 printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
1822 reset = 1;
1823 }
1824
1825 if (status & GREG_STAT_NORXD) {
1826 /* This is harmless, it just means the system is
1827 * quite loaded and the incoming packet rate was
1828 * faster than the interrupt handler could keep up
1829 * with.
1830 */
1831 printk(KERN_INFO "%s: Happy Meal out of receive "
1832 "descriptors, packet dropped.\n",
1833 hp->dev->name);
1834 }
1835
1836 if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
1837 /* All sorts of DMA receive errors. */
1838 printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
1839 if (status & GREG_STAT_RXERR)
1840 printk("GenericError ");
1841 if (status & GREG_STAT_RXPERR)
1842 printk("ParityError ");
1843 if (status & GREG_STAT_RXTERR)
1844 printk("RxTagBotch ");
1845 printk("]\n");
1846 reset = 1;
1847 }
1848
1849 if (status & GREG_STAT_EOPERR) {
1850 /* Driver bug, didn't set EOP bit in tx descriptor given
1851 * to the happy meal.
1852 */
1853 printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
1854 hp->dev->name);
1855 reset = 1;
1856 }
1857
1858 if (status & GREG_STAT_MIFIRQ) {
1859 /* MIF signalled an interrupt, were we polling it? */
1860 printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
1861 }
1862
1863 if (status &
1864 (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
1865 /* All sorts of transmit DMA errors. */
1866 printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
1867 if (status & GREG_STAT_TXEACK)
1868 printk("GenericError ");
1869 if (status & GREG_STAT_TXLERR)
1870 printk("LateError ");
1871 if (status & GREG_STAT_TXPERR)
1872 printk("ParityErro ");
1873 if (status & GREG_STAT_TXTERR)
1874 printk("TagBotch ");
1875 printk("]\n");
1876 reset = 1;
1877 }
1878
1879 if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
1880 /* Bus or parity error when cpu accessed happy meal registers
1881 * or it's internal FIFO's. Should never see this.
1882 */
1883 printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
1884 hp->dev->name,
1885 (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
1886 reset = 1;
1887 }
1888
1889 if (reset) {
1890 printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
1891 happy_meal_init(hp);
1892 return 1;
1893 }
1894 return 0;
1895 }
1896
1897 /* hp->happy_lock must be held */
1898 static void happy_meal_mif_interrupt(struct happy_meal *hp)
1899 {
1900 void __iomem *tregs = hp->tcvregs;
1901
1902 printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
1903 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1904 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
1905
1906 /* Use the fastest transmission protocol possible. */
1907 if (hp->sw_lpa & LPA_100FULL) {
1908 printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
1909 hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
1910 } else if (hp->sw_lpa & LPA_100HALF) {
1911 printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
1912 hp->sw_bmcr |= BMCR_SPEED100;
1913 } else if (hp->sw_lpa & LPA_10FULL) {
1914 printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
1915 hp->sw_bmcr |= BMCR_FULLDPLX;
1916 } else {
1917 printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
1918 }
1919 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1920
1921 /* Finally stop polling and shut up the MIF. */
1922 happy_meal_poll_stop(hp, tregs);
1923 }
1924
1925 #ifdef TXDEBUG
1926 #define TXD(x) printk x
1927 #else
1928 #define TXD(x)
1929 #endif
1930
1931 /* hp->happy_lock must be held */
1932 static void happy_meal_tx(struct happy_meal *hp)
1933 {
1934 struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
1935 struct happy_meal_txd *this;
1936 struct net_device *dev = hp->dev;
1937 int elem;
1938
1939 elem = hp->tx_old;
1940 TXD(("TX<"));
1941 while (elem != hp->tx_new) {
1942 struct sk_buff *skb;
1943 u32 flags, dma_addr, dma_len;
1944 int frag;
1945
1946 TXD(("[%d]", elem));
1947 this = &txbase[elem];
1948 flags = hme_read_desc32(hp, &this->tx_flags);
1949 if (flags & TXFLAG_OWN)
1950 break;
1951 skb = hp->tx_skbs[elem];
1952 if (skb_shinfo(skb)->nr_frags) {
1953 int last;
1954
1955 last = elem + skb_shinfo(skb)->nr_frags;
1956 last &= (TX_RING_SIZE - 1);
1957 flags = hme_read_desc32(hp, &txbase[last].tx_flags);
1958 if (flags & TXFLAG_OWN)
1959 break;
1960 }
1961 hp->tx_skbs[elem] = NULL;
1962 hp->net_stats.tx_bytes += skb->len;
1963
1964 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1965 dma_addr = hme_read_desc32(hp, &this->tx_addr);
1966 dma_len = hme_read_desc32(hp, &this->tx_flags);
1967
1968 dma_len &= TXFLAG_SIZE;
1969 hme_dma_unmap(hp, dma_addr, dma_len, DMA_TODEVICE);
1970
1971 elem = NEXT_TX(elem);
1972 this = &txbase[elem];
1973 }
1974
1975 dev_kfree_skb_irq(skb);
1976 hp->net_stats.tx_packets++;
1977 }
1978 hp->tx_old = elem;
1979 TXD((">"));
1980
1981 if (netif_queue_stopped(dev) &&
1982 TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
1983 netif_wake_queue(dev);
1984 }
1985
1986 #ifdef RXDEBUG
1987 #define RXD(x) printk x
1988 #else
1989 #define RXD(x)
1990 #endif
1991
1992 /* Originally I used to handle the allocation failure by just giving back just
1993 * that one ring buffer to the happy meal. Problem is that usually when that
1994 * condition is triggered, the happy meal expects you to do something reasonable
1995 * with all of the packets it has DMA'd in. So now I just drop the entire
1996 * ring when we cannot get a new skb and give them all back to the happy meal,
1997 * maybe things will be "happier" now.
1998 *
1999 * hp->happy_lock must be held
2000 */
2001 static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
2002 {
2003 struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
2004 struct happy_meal_rxd *this;
2005 int elem = hp->rx_new, drops = 0;
2006 u32 flags;
2007
2008 RXD(("RX<"));
2009 this = &rxbase[elem];
2010 while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
2011 struct sk_buff *skb;
2012 int len = flags >> 16;
2013 u16 csum = flags & RXFLAG_CSUM;
2014 u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
2015
2016 RXD(("[%d ", elem));
2017
2018 /* Check for errors. */
2019 if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
2020 RXD(("ERR(%08x)]", flags));
2021 hp->net_stats.rx_errors++;
2022 if (len < ETH_ZLEN)
2023 hp->net_stats.rx_length_errors++;
2024 if (len & (RXFLAG_OVERFLOW >> 16)) {
2025 hp->net_stats.rx_over_errors++;
2026 hp->net_stats.rx_fifo_errors++;
2027 }
2028
2029 /* Return it to the Happy meal. */
2030 drop_it:
2031 hp->net_stats.rx_dropped++;
2032 hme_write_rxd(hp, this,
2033 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2034 dma_addr);
2035 goto next;
2036 }
2037 skb = hp->rx_skbs[elem];
2038 if (len > RX_COPY_THRESHOLD) {
2039 struct sk_buff *new_skb;
2040
2041 /* Now refill the entry, if we can. */
2042 new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
2043 if (new_skb == NULL) {
2044 drops++;
2045 goto drop_it;
2046 }
2047 hme_dma_unmap(hp, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROMDEVICE);
2048 hp->rx_skbs[elem] = new_skb;
2049 new_skb->dev = dev;
2050 skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
2051 hme_write_rxd(hp, this,
2052 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2053 hme_dma_map(hp, new_skb->data, RX_BUF_ALLOC_SIZE, DMA_FROMDEVICE));
2054 skb_reserve(new_skb, RX_OFFSET);
2055
2056 /* Trim the original skb for the netif. */
2057 skb_trim(skb, len);
2058 } else {
2059 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
2060
2061 if (copy_skb == NULL) {
2062 drops++;
2063 goto drop_it;
2064 }
2065
2066 skb_reserve(copy_skb, 2);
2067 skb_put(copy_skb, len);
2068 hme_dma_sync_for_cpu(hp, dma_addr, len, DMA_FROMDEVICE);
2069 skb_copy_from_linear_data(skb, copy_skb->data, len);
2070 hme_dma_sync_for_device(hp, dma_addr, len, DMA_FROMDEVICE);
2071
2072 /* Reuse original ring buffer. */
2073 hme_write_rxd(hp, this,
2074 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2075 dma_addr);
2076
2077 skb = copy_skb;
2078 }
2079
2080 /* This card is _fucking_ hot... */
2081 skb->csum = csum_unfold(~(__force __sum16)htons(csum));
2082 skb->ip_summed = CHECKSUM_COMPLETE;
2083
2084 RXD(("len=%d csum=%4x]", len, csum));
2085 skb->protocol = eth_type_trans(skb, dev);
2086 netif_rx(skb);
2087
2088 dev->last_rx = jiffies;
2089 hp->net_stats.rx_packets++;
2090 hp->net_stats.rx_bytes += len;
2091 next:
2092 elem = NEXT_RX(elem);
2093 this = &rxbase[elem];
2094 }
2095 hp->rx_new = elem;
2096 if (drops)
2097 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
2098 RXD((">"));
2099 }
2100
2101 static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
2102 {
2103 struct net_device *dev = dev_id;
2104 struct happy_meal *hp = netdev_priv(dev);
2105 u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
2106
2107 HMD(("happy_meal_interrupt: status=%08x ", happy_status));
2108
2109 spin_lock(&hp->happy_lock);
2110
2111 if (happy_status & GREG_STAT_ERRORS) {
2112 HMD(("ERRORS "));
2113 if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
2114 goto out;
2115 }
2116
2117 if (happy_status & GREG_STAT_MIFIRQ) {
2118 HMD(("MIFIRQ "));
2119 happy_meal_mif_interrupt(hp);
2120 }
2121
2122 if (happy_status & GREG_STAT_TXALL) {
2123 HMD(("TXALL "));
2124 happy_meal_tx(hp);
2125 }
2126
2127 if (happy_status & GREG_STAT_RXTOHOST) {
2128 HMD(("RXTOHOST "));
2129 happy_meal_rx(hp, dev);
2130 }
2131
2132 HMD(("done\n"));
2133 out:
2134 spin_unlock(&hp->happy_lock);
2135
2136 return IRQ_HANDLED;
2137 }
2138
2139 #ifdef CONFIG_SBUS
2140 static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
2141 {
2142 struct quattro *qp = (struct quattro *) cookie;
2143 int i;
2144
2145 for (i = 0; i < 4; i++) {
2146 struct net_device *dev = qp->happy_meals[i];
2147 struct happy_meal *hp = dev->priv;
2148 u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
2149
2150 HMD(("quattro_interrupt: status=%08x ", happy_status));
2151
2152 if (!(happy_status & (GREG_STAT_ERRORS |
2153 GREG_STAT_MIFIRQ |
2154 GREG_STAT_TXALL |
2155 GREG_STAT_RXTOHOST)))
2156 continue;
2157
2158 spin_lock(&hp->happy_lock);
2159
2160 if (happy_status & GREG_STAT_ERRORS) {
2161 HMD(("ERRORS "));
2162 if (happy_meal_is_not_so_happy(hp, happy_status))
2163 goto next;
2164 }
2165
2166 if (happy_status & GREG_STAT_MIFIRQ) {
2167 HMD(("MIFIRQ "));
2168 happy_meal_mif_interrupt(hp);
2169 }
2170
2171 if (happy_status & GREG_STAT_TXALL) {
2172 HMD(("TXALL "));
2173 happy_meal_tx(hp);
2174 }
2175
2176 if (happy_status & GREG_STAT_RXTOHOST) {
2177 HMD(("RXTOHOST "));
2178 happy_meal_rx(hp, dev);
2179 }
2180
2181 next:
2182 spin_unlock(&hp->happy_lock);
2183 }
2184 HMD(("done\n"));
2185
2186 return IRQ_HANDLED;
2187 }
2188 #endif
2189
2190 static int happy_meal_open(struct net_device *dev)
2191 {
2192 struct happy_meal *hp = dev->priv;
2193 int res;
2194
2195 HMD(("happy_meal_open: "));
2196
2197 /* On SBUS Quattro QFE cards, all hme interrupts are concentrated
2198 * into a single source which we register handling at probe time.
2199 */
2200 if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
2201 if (request_irq(dev->irq, &happy_meal_interrupt,
2202 IRQF_SHARED, dev->name, (void *)dev)) {
2203 HMD(("EAGAIN\n"));
2204 printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
2205 dev->irq);
2206
2207 return -EAGAIN;
2208 }
2209 }
2210
2211 HMD(("to happy_meal_init\n"));
2212
2213 spin_lock_irq(&hp->happy_lock);
2214 res = happy_meal_init(hp);
2215 spin_unlock_irq(&hp->happy_lock);
2216
2217 if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
2218 free_irq(dev->irq, dev);
2219 return res;
2220 }
2221
2222 static int happy_meal_close(struct net_device *dev)
2223 {
2224 struct happy_meal *hp = dev->priv;
2225
2226 spin_lock_irq(&hp->happy_lock);
2227 happy_meal_stop(hp, hp->gregs);
2228 happy_meal_clean_rings(hp);
2229
2230 /* If auto-negotiation timer is running, kill it. */
2231 del_timer(&hp->happy_timer);
2232
2233 spin_unlock_irq(&hp->happy_lock);
2234
2235 /* On Quattro QFE cards, all hme interrupts are concentrated
2236 * into a single source which we register handling at probe
2237 * time and never unregister.
2238 */
2239 if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
2240 free_irq(dev->irq, dev);
2241
2242 return 0;
2243 }
2244
2245 #ifdef SXDEBUG
2246 #define SXD(x) printk x
2247 #else
2248 #define SXD(x)
2249 #endif
2250
2251 static void happy_meal_tx_timeout(struct net_device *dev)
2252 {
2253 struct happy_meal *hp = dev->priv;
2254
2255 printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
2256 tx_dump_log();
2257 printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
2258 hme_read32(hp, hp->gregs + GREG_STAT),
2259 hme_read32(hp, hp->etxregs + ETX_CFG),
2260 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
2261
2262 spin_lock_irq(&hp->happy_lock);
2263 happy_meal_init(hp);
2264 spin_unlock_irq(&hp->happy_lock);
2265
2266 netif_wake_queue(dev);
2267 }
2268
2269 static int happy_meal_start_xmit(struct sk_buff *skb, struct net_device *dev)
2270 {
2271 struct happy_meal *hp = dev->priv;
2272 int entry;
2273 u32 tx_flags;
2274
2275 tx_flags = TXFLAG_OWN;
2276 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2277 const u32 csum_start_off = skb_transport_offset(skb);
2278 const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
2279
2280 tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
2281 ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
2282 ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
2283 }
2284
2285 spin_lock_irq(&hp->happy_lock);
2286
2287 if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
2288 netif_stop_queue(dev);
2289 spin_unlock_irq(&hp->happy_lock);
2290 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
2291 dev->name);
2292 return 1;
2293 }
2294
2295 entry = hp->tx_new;
2296 SXD(("SX<l[%d]e[%d]>", len, entry));
2297 hp->tx_skbs[entry] = skb;
2298
2299 if (skb_shinfo(skb)->nr_frags == 0) {
2300 u32 mapping, len;
2301
2302 len = skb->len;
2303 mapping = hme_dma_map(hp, skb->data, len, DMA_TODEVICE);
2304 tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
2305 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2306 (tx_flags | (len & TXFLAG_SIZE)),
2307 mapping);
2308 entry = NEXT_TX(entry);
2309 } else {
2310 u32 first_len, first_mapping;
2311 int frag, first_entry = entry;
2312
2313 /* We must give this initial chunk to the device last.
2314 * Otherwise we could race with the device.
2315 */
2316 first_len = skb_headlen(skb);
2317 first_mapping = hme_dma_map(hp, skb->data, first_len, DMA_TODEVICE);
2318 entry = NEXT_TX(entry);
2319
2320 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
2321 skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
2322 u32 len, mapping, this_txflags;
2323
2324 len = this_frag->size;
2325 mapping = hme_dma_map(hp,
2326 ((void *) page_address(this_frag->page) +
2327 this_frag->page_offset),
2328 len, DMA_TODEVICE);
2329 this_txflags = tx_flags;
2330 if (frag == skb_shinfo(skb)->nr_frags - 1)
2331 this_txflags |= TXFLAG_EOP;
2332 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2333 (this_txflags | (len & TXFLAG_SIZE)),
2334 mapping);
2335 entry = NEXT_TX(entry);
2336 }
2337 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
2338 (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
2339 first_mapping);
2340 }
2341
2342 hp->tx_new = entry;
2343
2344 if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
2345 netif_stop_queue(dev);
2346
2347 /* Get it going. */
2348 hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
2349
2350 spin_unlock_irq(&hp->happy_lock);
2351
2352 dev->trans_start = jiffies;
2353
2354 tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
2355 return 0;
2356 }
2357
2358 static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
2359 {
2360 struct happy_meal *hp = dev->priv;
2361
2362 spin_lock_irq(&hp->happy_lock);
2363 happy_meal_get_counters(hp, hp->bigmacregs);
2364 spin_unlock_irq(&hp->happy_lock);
2365
2366 return &hp->net_stats;
2367 }
2368
2369 static void happy_meal_set_multicast(struct net_device *dev)
2370 {
2371 struct happy_meal *hp = dev->priv;
2372 void __iomem *bregs = hp->bigmacregs;
2373 struct dev_mc_list *dmi = dev->mc_list;
2374 char *addrs;
2375 int i;
2376 u32 crc;
2377
2378 spin_lock_irq(&hp->happy_lock);
2379
2380 netif_stop_queue(dev);
2381
2382 if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
2383 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
2384 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
2385 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
2386 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
2387 } else if (dev->flags & IFF_PROMISC) {
2388 hme_write32(hp, bregs + BMAC_RXCFG,
2389 hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
2390 } else {
2391 u16 hash_table[4];
2392
2393 for (i = 0; i < 4; i++)
2394 hash_table[i] = 0;
2395
2396 for (i = 0; i < dev->mc_count; i++) {
2397 addrs = dmi->dmi_addr;
2398 dmi = dmi->next;
2399
2400 if (!(*addrs & 1))
2401 continue;
2402
2403 crc = ether_crc_le(6, addrs);
2404 crc >>= 26;
2405 hash_table[crc >> 4] |= 1 << (crc & 0xf);
2406 }
2407 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
2408 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
2409 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
2410 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
2411 }
2412
2413 netif_wake_queue(dev);
2414
2415 spin_unlock_irq(&hp->happy_lock);
2416 }
2417
2418 /* Ethtool support... */
2419 static int hme_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2420 {
2421 struct happy_meal *hp = dev->priv;
2422
2423 cmd->supported =
2424 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2425 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2426 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
2427
2428 /* XXX hardcoded stuff for now */
2429 cmd->port = PORT_TP; /* XXX no MII support */
2430 cmd->transceiver = XCVR_INTERNAL; /* XXX no external xcvr support */
2431 cmd->phy_address = 0; /* XXX fixed PHYAD */
2432
2433 /* Record PHY settings. */
2434 spin_lock_irq(&hp->happy_lock);
2435 hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2436 hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
2437 spin_unlock_irq(&hp->happy_lock);
2438
2439 if (hp->sw_bmcr & BMCR_ANENABLE) {
2440 cmd->autoneg = AUTONEG_ENABLE;
2441 cmd->speed =
2442 (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
2443 SPEED_100 : SPEED_10;
2444 if (cmd->speed == SPEED_100)
2445 cmd->duplex =
2446 (hp->sw_lpa & (LPA_100FULL)) ?
2447 DUPLEX_FULL : DUPLEX_HALF;
2448 else
2449 cmd->duplex =
2450 (hp->sw_lpa & (LPA_10FULL)) ?
2451 DUPLEX_FULL : DUPLEX_HALF;
2452 } else {
2453 cmd->autoneg = AUTONEG_DISABLE;
2454 cmd->speed =
2455 (hp->sw_bmcr & BMCR_SPEED100) ?
2456 SPEED_100 : SPEED_10;
2457 cmd->duplex =
2458 (hp->sw_bmcr & BMCR_FULLDPLX) ?
2459 DUPLEX_FULL : DUPLEX_HALF;
2460 }
2461 return 0;
2462 }
2463
2464 static int hme_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2465 {
2466 struct happy_meal *hp = dev->priv;
2467
2468 /* Verify the settings we care about. */
2469 if (cmd->autoneg != AUTONEG_ENABLE &&
2470 cmd->autoneg != AUTONEG_DISABLE)
2471 return -EINVAL;
2472 if (cmd->autoneg == AUTONEG_DISABLE &&
2473 ((cmd->speed != SPEED_100 &&
2474 cmd->speed != SPEED_10) ||
2475 (cmd->duplex != DUPLEX_HALF &&
2476 cmd->duplex != DUPLEX_FULL)))
2477 return -EINVAL;
2478
2479 /* Ok, do it to it. */
2480 spin_lock_irq(&hp->happy_lock);
2481 del_timer(&hp->happy_timer);
2482 happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
2483 spin_unlock_irq(&hp->happy_lock);
2484
2485 return 0;
2486 }
2487
2488 static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2489 {
2490 struct happy_meal *hp = dev->priv;
2491
2492 strcpy(info->driver, "sunhme");
2493 strcpy(info->version, "2.02");
2494 if (hp->happy_flags & HFLAG_PCI) {
2495 struct pci_dev *pdev = hp->happy_dev;
2496 strcpy(info->bus_info, pci_name(pdev));
2497 }
2498 #ifdef CONFIG_SBUS
2499 else {
2500 struct sbus_dev *sdev = hp->happy_dev;
2501 sprintf(info->bus_info, "SBUS:%d",
2502 sdev->slot);
2503 }
2504 #endif
2505 }
2506
2507 static u32 hme_get_link(struct net_device *dev)
2508 {
2509 struct happy_meal *hp = dev->priv;
2510
2511 spin_lock_irq(&hp->happy_lock);
2512 hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2513 spin_unlock_irq(&hp->happy_lock);
2514
2515 return (hp->sw_bmsr & BMSR_LSTATUS);
2516 }
2517
2518 static const struct ethtool_ops hme_ethtool_ops = {
2519 .get_settings = hme_get_settings,
2520 .set_settings = hme_set_settings,
2521 .get_drvinfo = hme_get_drvinfo,
2522 .get_link = hme_get_link,
2523 };
2524
2525 static int hme_version_printed;
2526
2527 #ifdef CONFIG_SBUS
2528 void __devinit quattro_get_ranges(struct quattro *qp)
2529 {
2530 struct sbus_dev *sdev = qp->quattro_dev;
2531 int err;
2532
2533 err = prom_getproperty(sdev->prom_node,
2534 "ranges",
2535 (char *)&qp->ranges[0],
2536 sizeof(qp->ranges));
2537 if (err == 0 || err == -1) {
2538 qp->nranges = 0;
2539 return;
2540 }
2541 qp->nranges = (err / sizeof(struct linux_prom_ranges));
2542 }
2543
2544 static void __devinit quattro_apply_ranges(struct quattro *qp, struct happy_meal *hp)
2545 {
2546 struct sbus_dev *sdev = hp->happy_dev;
2547 int rng;
2548
2549 for (rng = 0; rng < qp->nranges; rng++) {
2550 struct linux_prom_ranges *rngp = &qp->ranges[rng];
2551 int reg;
2552
2553 for (reg = 0; reg < 5; reg++) {
2554 if (sdev->reg_addrs[reg].which_io ==
2555 rngp->ot_child_space)
2556 break;
2557 }
2558 if (reg == 5)
2559 continue;
2560
2561 sdev->reg_addrs[reg].which_io = rngp->ot_parent_space;
2562 sdev->reg_addrs[reg].phys_addr += rngp->ot_parent_base;
2563 }
2564 }
2565
2566 /* Given a happy meal sbus device, find it's quattro parent.
2567 * If none exist, allocate and return a new one.
2568 *
2569 * Return NULL on failure.
2570 */
2571 static struct quattro * __devinit quattro_sbus_find(struct sbus_dev *goal_sdev)
2572 {
2573 struct sbus_dev *sdev;
2574 struct quattro *qp;
2575 int i;
2576
2577 for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2578 for (i = 0, sdev = qp->quattro_dev;
2579 (sdev != NULL) && (i < 4);
2580 sdev = sdev->next, i++) {
2581 if (sdev == goal_sdev)
2582 return qp;
2583 }
2584 }
2585
2586 qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2587 if (qp != NULL) {
2588 int i;
2589
2590 for (i = 0; i < 4; i++)
2591 qp->happy_meals[i] = NULL;
2592
2593 qp->quattro_dev = goal_sdev;
2594 qp->next = qfe_sbus_list;
2595 qfe_sbus_list = qp;
2596 quattro_get_ranges(qp);
2597 }
2598 return qp;
2599 }
2600
2601 /* After all quattro cards have been probed, we call these functions
2602 * to register the IRQ handlers.
2603 */
2604 static void __init quattro_sbus_register_irqs(void)
2605 {
2606 struct quattro *qp;
2607
2608 for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2609 struct sbus_dev *sdev = qp->quattro_dev;
2610 int err;
2611
2612 err = request_irq(sdev->irqs[0],
2613 quattro_sbus_interrupt,
2614 IRQF_SHARED, "Quattro",
2615 qp);
2616 if (err != 0) {
2617 printk(KERN_ERR "Quattro: Fatal IRQ registery error %d.\n", err);
2618 panic("QFE request irq");
2619 }
2620 }
2621 }
2622
2623 static void quattro_sbus_free_irqs(void)
2624 {
2625 struct quattro *qp;
2626
2627 for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2628 struct sbus_dev *sdev = qp->quattro_dev;
2629
2630 free_irq(sdev->irqs[0], qp);
2631 }
2632 }
2633 #endif /* CONFIG_SBUS */
2634
2635 #ifdef CONFIG_PCI
2636 static struct quattro * __devinit quattro_pci_find(struct pci_dev *pdev)
2637 {
2638 struct pci_dev *bdev = pdev->bus->self;
2639 struct quattro *qp;
2640
2641 if (!bdev) return NULL;
2642 for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
2643 struct pci_dev *qpdev = qp->quattro_dev;
2644
2645 if (qpdev == bdev)
2646 return qp;
2647 }
2648 qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2649 if (qp != NULL) {
2650 int i;
2651
2652 for (i = 0; i < 4; i++)
2653 qp->happy_meals[i] = NULL;
2654
2655 qp->quattro_dev = bdev;
2656 qp->next = qfe_pci_list;
2657 qfe_pci_list = qp;
2658
2659 /* No range tricks necessary on PCI. */
2660 qp->nranges = 0;
2661 }
2662 return qp;
2663 }
2664 #endif /* CONFIG_PCI */
2665
2666 #ifdef CONFIG_SBUS
2667 static int __devinit happy_meal_sbus_probe_one(struct sbus_dev *sdev, int is_qfe)
2668 {
2669 struct device_node *dp = sdev->ofdev.node;
2670 struct quattro *qp = NULL;
2671 struct happy_meal *hp;
2672 struct net_device *dev;
2673 int i, qfe_slot = -1;
2674 int err = -ENODEV;
2675 DECLARE_MAC_BUF(mac);
2676
2677 if (is_qfe) {
2678 qp = quattro_sbus_find(sdev);
2679 if (qp == NULL)
2680 goto err_out;
2681 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2682 if (qp->happy_meals[qfe_slot] == NULL)
2683 break;
2684 if (qfe_slot == 4)
2685 goto err_out;
2686 }
2687
2688 err = -ENOMEM;
2689 dev = alloc_etherdev(sizeof(struct happy_meal));
2690 if (!dev)
2691 goto err_out;
2692 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
2693
2694 if (hme_version_printed++ == 0)
2695 printk(KERN_INFO "%s", version);
2696
2697 /* If user did not specify a MAC address specifically, use
2698 * the Quattro local-mac-address property...
2699 */
2700 for (i = 0; i < 6; i++) {
2701 if (macaddr[i] != 0)
2702 break;
2703 }
2704 if (i < 6) { /* a mac address was given */
2705 for (i = 0; i < 6; i++)
2706 dev->dev_addr[i] = macaddr[i];
2707 macaddr[5]++;
2708 } else {
2709 const unsigned char *addr;
2710 int len;
2711
2712 addr = of_get_property(dp, "local-mac-address", &len);
2713
2714 if (qfe_slot != -1 && addr && len == 6)
2715 memcpy(dev->dev_addr, addr, 6);
2716 else
2717 memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
2718 }
2719
2720 hp = dev->priv;
2721
2722 hp->happy_dev = sdev;
2723
2724 spin_lock_init(&hp->happy_lock);
2725
2726 err = -ENODEV;
2727 if (sdev->num_registers != 5) {
2728 printk(KERN_ERR "happymeal: Device needs 5 regs, has %d.\n",
2729 sdev->num_registers);
2730 goto err_out_free_netdev;
2731 }
2732
2733 if (qp != NULL) {
2734 hp->qfe_parent = qp;
2735 hp->qfe_ent = qfe_slot;
2736 qp->happy_meals[qfe_slot] = dev;
2737 quattro_apply_ranges(qp, hp);
2738 }
2739
2740 hp->gregs = sbus_ioremap(&sdev->resource[0], 0,
2741 GREG_REG_SIZE, "HME Global Regs");
2742 if (!hp->gregs) {
2743 printk(KERN_ERR "happymeal: Cannot map global registers.\n");
2744 goto err_out_free_netdev;
2745 }
2746
2747 hp->etxregs = sbus_ioremap(&sdev->resource[1], 0,
2748 ETX_REG_SIZE, "HME TX Regs");
2749 if (!hp->etxregs) {
2750 printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
2751 goto err_out_iounmap;
2752 }
2753
2754 hp->erxregs = sbus_ioremap(&sdev->resource[2], 0,
2755 ERX_REG_SIZE, "HME RX Regs");
2756 if (!hp->erxregs) {
2757 printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
2758 goto err_out_iounmap;
2759 }
2760
2761 hp->bigmacregs = sbus_ioremap(&sdev->resource[3], 0,
2762 BMAC_REG_SIZE, "HME BIGMAC Regs");
2763 if (!hp->bigmacregs) {
2764 printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
2765 goto err_out_iounmap;
2766 }
2767
2768 hp->tcvregs = sbus_ioremap(&sdev->resource[4], 0,
2769 TCVR_REG_SIZE, "HME Tranceiver Regs");
2770 if (!hp->tcvregs) {
2771 printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
2772 goto err_out_iounmap;
2773 }
2774
2775 hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
2776 if (hp->hm_revision == 0xff)
2777 hp->hm_revision = 0xa0;
2778
2779 /* Now enable the feature flags we can. */
2780 if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
2781 hp->happy_flags = HFLAG_20_21;
2782 else if (hp->hm_revision != 0xa0)
2783 hp->happy_flags = HFLAG_NOT_A0;
2784
2785 if (qp != NULL)
2786 hp->happy_flags |= HFLAG_QUATTRO;
2787
2788 /* Get the supported DVMA burst sizes from our Happy SBUS. */
2789 hp->happy_bursts = of_getintprop_default(sdev->bus->ofdev.node,
2790 "burst-sizes", 0x00);
2791
2792 hp->happy_block = sbus_alloc_consistent(hp->happy_dev,
2793 PAGE_SIZE,
2794 &hp->hblock_dvma);
2795 err = -ENOMEM;
2796 if (!hp->happy_block) {
2797 printk(KERN_ERR "happymeal: Cannot allocate descriptors.\n");
2798 goto err_out_iounmap;
2799 }
2800
2801 /* Force check of the link first time we are brought up. */
2802 hp->linkcheck = 0;
2803
2804 /* Force timer state to 'asleep' with count of zero. */
2805 hp->timer_state = asleep;
2806 hp->timer_ticks = 0;
2807
2808 init_timer(&hp->happy_timer);
2809
2810 hp->dev = dev;
2811 dev->open = &happy_meal_open;
2812 dev->stop = &happy_meal_close;
2813 dev->hard_start_xmit = &happy_meal_start_xmit;
2814 dev->get_stats = &happy_meal_get_stats;
2815 dev->set_multicast_list = &happy_meal_set_multicast;
2816 dev->tx_timeout = &happy_meal_tx_timeout;
2817 dev->watchdog_timeo = 5*HZ;
2818 dev->ethtool_ops = &hme_ethtool_ops;
2819
2820 /* Happy Meal can do it all... */
2821 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2822
2823 dev->irq = sdev->irqs[0];
2824
2825 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
2826 /* Hook up PCI register/dma accessors. */
2827 hp->read_desc32 = sbus_hme_read_desc32;
2828 hp->write_txd = sbus_hme_write_txd;
2829 hp->write_rxd = sbus_hme_write_rxd;
2830 hp->dma_map = (u32 (*)(void *, void *, long, int))sbus_map_single;
2831 hp->dma_unmap = (void (*)(void *, u32, long, int))sbus_unmap_single;
2832 hp->dma_sync_for_cpu = (void (*)(void *, u32, long, int))
2833 sbus_dma_sync_single_for_cpu;
2834 hp->dma_sync_for_device = (void (*)(void *, u32, long, int))
2835 sbus_dma_sync_single_for_device;
2836 hp->read32 = sbus_hme_read32;
2837 hp->write32 = sbus_hme_write32;
2838 #endif
2839
2840 /* Grrr, Happy Meal comes up by default not advertising
2841 * full duplex 100baseT capabilities, fix this.
2842 */
2843 spin_lock_irq(&hp->happy_lock);
2844 happy_meal_set_initial_advertisement(hp);
2845 spin_unlock_irq(&hp->happy_lock);
2846
2847 if (register_netdev(hp->dev)) {
2848 printk(KERN_ERR "happymeal: Cannot register net device, "
2849 "aborting.\n");
2850 goto err_out_free_consistent;
2851 }
2852
2853 dev_set_drvdata(&sdev->ofdev.dev, hp);
2854
2855 if (qfe_slot != -1)
2856 printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
2857 dev->name, qfe_slot);
2858 else
2859 printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
2860 dev->name);
2861
2862 printk("%s\n", print_mac(mac, dev->dev_addr));
2863
2864 return 0;
2865
2866 err_out_free_consistent:
2867 sbus_free_consistent(hp->happy_dev,
2868 PAGE_SIZE,
2869 hp->happy_block,
2870 hp->hblock_dvma);
2871
2872 err_out_iounmap:
2873 if (hp->gregs)
2874 sbus_iounmap(hp->gregs, GREG_REG_SIZE);
2875 if (hp->etxregs)
2876 sbus_iounmap(hp->etxregs, ETX_REG_SIZE);
2877 if (hp->erxregs)
2878 sbus_iounmap(hp->erxregs, ERX_REG_SIZE);
2879 if (hp->bigmacregs)
2880 sbus_iounmap(hp->bigmacregs, BMAC_REG_SIZE);
2881 if (hp->tcvregs)
2882 sbus_iounmap(hp->tcvregs, TCVR_REG_SIZE);
2883
2884 err_out_free_netdev:
2885 free_netdev(dev);
2886
2887 err_out:
2888 return err;
2889 }
2890 #endif
2891
2892 #ifdef CONFIG_PCI
2893 #ifndef CONFIG_SPARC
2894 static int is_quattro_p(struct pci_dev *pdev)
2895 {
2896 struct pci_dev *busdev = pdev->bus->self;
2897 struct list_head *tmp;
2898 int n_hmes;
2899
2900 if (busdev == NULL ||
2901 busdev->vendor != PCI_VENDOR_ID_DEC ||
2902 busdev->device != PCI_DEVICE_ID_DEC_21153)
2903 return 0;
2904
2905 n_hmes = 0;
2906 tmp = pdev->bus->devices.next;
2907 while (tmp != &pdev->bus->devices) {
2908 struct pci_dev *this_pdev = pci_dev_b(tmp);
2909
2910 if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
2911 this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
2912 n_hmes++;
2913
2914 tmp = tmp->next;
2915 }
2916
2917 if (n_hmes != 4)
2918 return 0;
2919
2920 return 1;
2921 }
2922
2923 /* Fetch MAC address from vital product data of PCI ROM. */
2924 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
2925 {
2926 int this_offset;
2927
2928 for (this_offset = 0x20; this_offset < len; this_offset++) {
2929 void __iomem *p = rom_base + this_offset;
2930
2931 if (readb(p + 0) != 0x90 ||
2932 readb(p + 1) != 0x00 ||
2933 readb(p + 2) != 0x09 ||
2934 readb(p + 3) != 0x4e ||
2935 readb(p + 4) != 0x41 ||
2936 readb(p + 5) != 0x06)
2937 continue;
2938
2939 this_offset += 6;
2940 p += 6;
2941
2942 if (index == 0) {
2943 int i;
2944
2945 for (i = 0; i < 6; i++)
2946 dev_addr[i] = readb(p + i);
2947 return 1;
2948 }
2949 index--;
2950 }
2951 return 0;
2952 }
2953
2954 static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
2955 {
2956 size_t size;
2957 void __iomem *p = pci_map_rom(pdev, &size);
2958
2959 if (p) {
2960 int index = 0;
2961 int found;
2962
2963 if (is_quattro_p(pdev))
2964 index = PCI_SLOT(pdev->devfn);
2965
2966 found = readb(p) == 0x55 &&
2967 readb(p + 1) == 0xaa &&
2968 find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
2969 pci_unmap_rom(pdev, p);
2970 if (found)
2971 return;
2972 }
2973
2974 /* Sun MAC prefix then 3 random bytes. */
2975 dev_addr[0] = 0x08;
2976 dev_addr[1] = 0x00;
2977 dev_addr[2] = 0x20;
2978 get_random_bytes(&dev_addr[3], 3);
2979 return;
2980 }
2981 #endif /* !(CONFIG_SPARC) */
2982
2983 static int __devinit happy_meal_pci_probe(struct pci_dev *pdev,
2984 const struct pci_device_id *ent)
2985 {
2986 struct quattro *qp = NULL;
2987 #ifdef CONFIG_SPARC
2988 struct device_node *dp;
2989 #endif
2990 struct happy_meal *hp;
2991 struct net_device *dev;
2992 void __iomem *hpreg_base;
2993 unsigned long hpreg_res;
2994 int i, qfe_slot = -1;
2995 char prom_name[64];
2996 int err;
2997 DECLARE_MAC_BUF(mac);
2998
2999 /* Now make sure pci_dev cookie is there. */
3000 #ifdef CONFIG_SPARC
3001 dp = pci_device_to_OF_node(pdev);
3002 strcpy(prom_name, dp->name);
3003 #else
3004 if (is_quattro_p(pdev))
3005 strcpy(prom_name, "SUNW,qfe");
3006 else
3007 strcpy(prom_name, "SUNW,hme");
3008 #endif
3009
3010 err = -ENODEV;
3011
3012 if (pci_enable_device(pdev))
3013 goto err_out;
3014 pci_set_master(pdev);
3015
3016 if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
3017 qp = quattro_pci_find(pdev);
3018 if (qp == NULL)
3019 goto err_out;
3020 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
3021 if (qp->happy_meals[qfe_slot] == NULL)
3022 break;
3023 if (qfe_slot == 4)
3024 goto err_out;
3025 }
3026
3027 dev = alloc_etherdev(sizeof(struct happy_meal));
3028 err = -ENOMEM;
3029 if (!dev)
3030 goto err_out;
3031 SET_NETDEV_DEV(dev, &pdev->dev);
3032
3033 if (hme_version_printed++ == 0)
3034 printk(KERN_INFO "%s", version);
3035
3036 dev->base_addr = (long) pdev;
3037
3038 hp = (struct happy_meal *)dev->priv;
3039 memset(hp, 0, sizeof(*hp));
3040
3041 hp->happy_dev = pdev;
3042
3043 spin_lock_init(&hp->happy_lock);
3044
3045 if (qp != NULL) {
3046 hp->qfe_parent = qp;
3047 hp->qfe_ent = qfe_slot;
3048 qp->happy_meals[qfe_slot] = dev;
3049 }
3050
3051 hpreg_res = pci_resource_start(pdev, 0);
3052 err = -ENODEV;
3053 if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
3054 printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
3055 goto err_out_clear_quattro;
3056 }
3057 if (pci_request_regions(pdev, DRV_NAME)) {
3058 printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
3059 "aborting.\n");
3060 goto err_out_clear_quattro;
3061 }
3062
3063 if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
3064 printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
3065 goto err_out_free_res;
3066 }
3067
3068 for (i = 0; i < 6; i++) {
3069 if (macaddr[i] != 0)
3070 break;
3071 }
3072 if (i < 6) { /* a mac address was given */
3073 for (i = 0; i < 6; i++)
3074 dev->dev_addr[i] = macaddr[i];
3075 macaddr[5]++;
3076 } else {
3077 #ifdef CONFIG_SPARC
3078 const unsigned char *addr;
3079 int len;
3080
3081 if (qfe_slot != -1 &&
3082 (addr = of_get_property(dp,
3083 "local-mac-address", &len)) != NULL
3084 && len == 6) {
3085 memcpy(dev->dev_addr, addr, 6);
3086 } else {
3087 memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
3088 }
3089 #else
3090 get_hme_mac_nonsparc(pdev, &dev->dev_addr[0]);
3091 #endif
3092 }
3093
3094 /* Layout registers. */
3095 hp->gregs = (hpreg_base + 0x0000UL);
3096 hp->etxregs = (hpreg_base + 0x2000UL);
3097 hp->erxregs = (hpreg_base + 0x4000UL);
3098 hp->bigmacregs = (hpreg_base + 0x6000UL);
3099 hp->tcvregs = (hpreg_base + 0x7000UL);
3100
3101 #ifdef CONFIG_SPARC
3102 hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
3103 if (hp->hm_revision == 0xff)
3104 hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
3105 #else
3106 /* works with this on non-sparc hosts */
3107 hp->hm_revision = 0x20;
3108 #endif
3109
3110 /* Now enable the feature flags we can. */
3111 if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
3112 hp->happy_flags = HFLAG_20_21;
3113 else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
3114 hp->happy_flags = HFLAG_NOT_A0;
3115
3116 if (qp != NULL)
3117 hp->happy_flags |= HFLAG_QUATTRO;
3118
3119 /* And of course, indicate this is PCI. */
3120 hp->happy_flags |= HFLAG_PCI;
3121
3122 #ifdef CONFIG_SPARC
3123 /* Assume PCI happy meals can handle all burst sizes. */
3124 hp->happy_bursts = DMA_BURSTBITS;
3125 #endif
3126
3127 hp->happy_block = (struct hmeal_init_block *)
3128 pci_alloc_consistent(pdev, PAGE_SIZE, &hp->hblock_dvma);
3129
3130 err = -ENODEV;
3131 if (!hp->happy_block) {
3132 printk(KERN_ERR "happymeal(PCI): Cannot get hme init block.\n");
3133 goto err_out_iounmap;
3134 }
3135
3136 hp->linkcheck = 0;
3137 hp->timer_state = asleep;
3138 hp->timer_ticks = 0;
3139
3140 init_timer(&hp->happy_timer);
3141
3142 hp->dev = dev;
3143 dev->open = &happy_meal_open;
3144 dev->stop = &happy_meal_close;
3145 dev->hard_start_xmit = &happy_meal_start_xmit;
3146 dev->get_stats = &happy_meal_get_stats;
3147 dev->set_multicast_list = &happy_meal_set_multicast;
3148 dev->tx_timeout = &happy_meal_tx_timeout;
3149 dev->watchdog_timeo = 5*HZ;
3150 dev->ethtool_ops = &hme_ethtool_ops;
3151 dev->irq = pdev->irq;
3152 dev->dma = 0;
3153
3154 /* Happy Meal can do it all... */
3155 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
3156
3157 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
3158 /* Hook up PCI register/dma accessors. */
3159 hp->read_desc32 = pci_hme_read_desc32;
3160 hp->write_txd = pci_hme_write_txd;
3161 hp->write_rxd = pci_hme_write_rxd;
3162 hp->dma_map = (u32 (*)(void *, void *, long, int))pci_map_single;
3163 hp->dma_unmap = (void (*)(void *, u32, long, int))pci_unmap_single;
3164 hp->dma_sync_for_cpu = (void (*)(void *, u32, long, int))
3165 pci_dma_sync_single_for_cpu;
3166 hp->dma_sync_for_device = (void (*)(void *, u32, long, int))
3167 pci_dma_sync_single_for_device;
3168 hp->read32 = pci_hme_read32;
3169 hp->write32 = pci_hme_write32;
3170 #endif
3171
3172 /* Grrr, Happy Meal comes up by default not advertising
3173 * full duplex 100baseT capabilities, fix this.
3174 */
3175 spin_lock_irq(&hp->happy_lock);
3176 happy_meal_set_initial_advertisement(hp);
3177 spin_unlock_irq(&hp->happy_lock);
3178
3179 if (register_netdev(hp->dev)) {
3180 printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
3181 "aborting.\n");
3182 goto err_out_iounmap;
3183 }
3184
3185 dev_set_drvdata(&pdev->dev, hp);
3186
3187 if (!qfe_slot) {
3188 struct pci_dev *qpdev = qp->quattro_dev;
3189
3190 prom_name[0] = 0;
3191 if (!strncmp(dev->name, "eth", 3)) {
3192 int i = simple_strtoul(dev->name + 3, NULL, 10);
3193 sprintf(prom_name, "-%d", i + 3);
3194 }
3195 printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
3196 if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
3197 qpdev->device == PCI_DEVICE_ID_DEC_21153)
3198 printk("DEC 21153 PCI Bridge\n");
3199 else
3200 printk("unknown bridge %04x.%04x\n",
3201 qpdev->vendor, qpdev->device);
3202 }
3203
3204 if (qfe_slot != -1)
3205 printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
3206 dev->name, qfe_slot);
3207 else
3208 printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
3209 dev->name);
3210
3211 printk("%s\n", print_mac(mac, dev->dev_addr));
3212
3213 return 0;
3214
3215 err_out_iounmap:
3216 iounmap(hp->gregs);
3217
3218 err_out_free_res:
3219 pci_release_regions(pdev);
3220
3221 err_out_clear_quattro:
3222 if (qp != NULL)
3223 qp->happy_meals[qfe_slot] = NULL;
3224
3225 free_netdev(dev);
3226
3227 err_out:
3228 return err;
3229 }
3230
3231 static void __devexit happy_meal_pci_remove(struct pci_dev *pdev)
3232 {
3233 struct happy_meal *hp = dev_get_drvdata(&pdev->dev);
3234 struct net_device *net_dev = hp->dev;
3235
3236 unregister_netdev(net_dev);
3237
3238 pci_free_consistent(hp->happy_dev,
3239 PAGE_SIZE,
3240 hp->happy_block,
3241 hp->hblock_dvma);
3242 iounmap(hp->gregs);
3243 pci_release_regions(hp->happy_dev);
3244
3245 free_netdev(net_dev);
3246
3247 dev_set_drvdata(&pdev->dev, NULL);
3248 }
3249
3250 static struct pci_device_id happymeal_pci_ids[] = {
3251 { PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
3252 { } /* Terminating entry */
3253 };
3254
3255 MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
3256
3257 static struct pci_driver hme_pci_driver = {
3258 .name = "hme",
3259 .id_table = happymeal_pci_ids,
3260 .probe = happy_meal_pci_probe,
3261 .remove = __devexit_p(happy_meal_pci_remove),
3262 };
3263
3264 static int __init happy_meal_pci_init(void)
3265 {
3266 return pci_register_driver(&hme_pci_driver);
3267 }
3268
3269 static void happy_meal_pci_exit(void)
3270 {
3271 pci_unregister_driver(&hme_pci_driver);
3272
3273 while (qfe_pci_list) {
3274 struct quattro *qfe = qfe_pci_list;
3275 struct quattro *next = qfe->next;
3276
3277 kfree(qfe);
3278
3279 qfe_pci_list = next;
3280 }
3281 }
3282
3283 #endif
3284
3285 #ifdef CONFIG_SBUS
3286 static int __devinit hme_sbus_probe(struct of_device *dev, const struct of_device_id *match)
3287 {
3288 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
3289 struct device_node *dp = dev->node;
3290 const char *model = of_get_property(dp, "model", NULL);
3291 int is_qfe = (match->data != NULL);
3292
3293 if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
3294 is_qfe = 1;
3295
3296 return happy_meal_sbus_probe_one(sdev, is_qfe);
3297 }
3298
3299 static int __devexit hme_sbus_remove(struct of_device *dev)
3300 {
3301 struct happy_meal *hp = dev_get_drvdata(&dev->dev);
3302 struct net_device *net_dev = hp->dev;
3303
3304 unregister_netdev(net_dev);
3305
3306 /* XXX qfe parent interrupt... */
3307
3308 sbus_iounmap(hp->gregs, GREG_REG_SIZE);
3309 sbus_iounmap(hp->etxregs, ETX_REG_SIZE);
3310 sbus_iounmap(hp->erxregs, ERX_REG_SIZE);
3311 sbus_iounmap(hp->bigmacregs, BMAC_REG_SIZE);
3312 sbus_iounmap(hp->tcvregs, TCVR_REG_SIZE);
3313 sbus_free_consistent(hp->happy_dev,
3314 PAGE_SIZE,
3315 hp->happy_block,
3316 hp->hblock_dvma);
3317
3318 free_netdev(net_dev);
3319
3320 dev_set_drvdata(&dev->dev, NULL);
3321
3322 return 0;
3323 }
3324
3325 static struct of_device_id hme_sbus_match[] = {
3326 {
3327 .name = "SUNW,hme",
3328 },
3329 {
3330 .name = "SUNW,qfe",
3331 .data = (void *) 1,
3332 },
3333 {
3334 .name = "qfe",
3335 .data = (void *) 1,
3336 },
3337 {},
3338 };
3339
3340 MODULE_DEVICE_TABLE(of, hme_sbus_match);
3341
3342 static struct of_platform_driver hme_sbus_driver = {
3343 .name = "hme",
3344 .match_table = hme_sbus_match,
3345 .probe = hme_sbus_probe,
3346 .remove = __devexit_p(hme_sbus_remove),
3347 };
3348
3349 static int __init happy_meal_sbus_init(void)
3350 {
3351 int err;
3352
3353 err = of_register_driver(&hme_sbus_driver, &sbus_bus_type);
3354 if (!err)
3355 quattro_sbus_register_irqs();
3356
3357 return err;
3358 }
3359
3360 static void happy_meal_sbus_exit(void)
3361 {
3362 of_unregister_driver(&hme_sbus_driver);
3363 quattro_sbus_free_irqs();
3364
3365 while (qfe_sbus_list) {
3366 struct quattro *qfe = qfe_sbus_list;
3367 struct quattro *next = qfe->next;
3368
3369 kfree(qfe);
3370
3371 qfe_sbus_list = next;
3372 }
3373 }
3374 #endif
3375
3376 static int __init happy_meal_probe(void)
3377 {
3378 int err = 0;
3379
3380 #ifdef CONFIG_SBUS
3381 err = happy_meal_sbus_init();
3382 #endif
3383 #ifdef CONFIG_PCI
3384 if (!err) {
3385 err = happy_meal_pci_init();
3386 #ifdef CONFIG_SBUS
3387 if (err)
3388 happy_meal_sbus_exit();
3389 #endif
3390 }
3391 #endif
3392
3393 return err;
3394 }
3395
3396
3397 static void __exit happy_meal_exit(void)
3398 {
3399 #ifdef CONFIG_SBUS
3400 happy_meal_sbus_exit();
3401 #endif
3402 #ifdef CONFIG_PCI
3403 happy_meal_pci_exit();
3404 #endif
3405 }
3406
3407 module_init(happy_meal_probe);
3408 module_exit(happy_meal_exit);
Stable & featurefull patchset based on Linus's git branch