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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / ethernet / sun / sunhme.c
blob09c518655db2bcc36ffca85518325a6af3358ecf
1 /* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
2 * auto carrier detecting ethernet driver. Also known as the
3 * "Happy Meal Ethernet" found on SunSwift SBUS cards.
4 *
5 * Copyright (C) 1996, 1998, 1999, 2002, 2003,
6 * 2006, 2008 David S. Miller (davem@davemloft.net)
7 *
8 * Changes :
9 * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
10 * - port to non-sparc architectures. Tested only on x86 and
11 * only currently works with QFE PCI cards.
12 * - ability to specify the MAC address at module load time by passing this
13 * argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
14 */
15
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/fcntl.h>
20 #include <linux/interrupt.h>
21 #include <linux/ioport.h>
22 #include <linux/in.h>
23 #include <linux/slab.h>
24 #include <linux/string.h>
25 #include <linux/delay.h>
26 #include <linux/init.h>
27 #include <linux/ethtool.h>
28 #include <linux/mii.h>
29 #include <linux/crc32.h>
30 #include <linux/random.h>
31 #include <linux/errno.h>
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/skbuff.h>
35 #include <linux/mm.h>
36 #include <linux/bitops.h>
37 #include <linux/dma-mapping.h>
38
39 #include <asm/system.h>
40 #include <asm/io.h>
41 #include <asm/dma.h>
42 #include <asm/byteorder.h>
43
44 #ifdef CONFIG_SPARC
45 #include <linux/of.h>
46 #include <linux/of_device.h>
47 #include <asm/idprom.h>
48 #include <asm/openprom.h>
49 #include <asm/oplib.h>
50 #include <asm/prom.h>
51 #include <asm/auxio.h>
52 #endif
53 #include <asm/uaccess.h>
54
55 #include <asm/pgtable.h>
56 #include <asm/irq.h>
57
58 #ifdef CONFIG_PCI
59 #include <linux/pci.h>
60 #endif
61
62 #include "sunhme.h"
63
64 #define DRV_NAME "sunhme"
65 #define DRV_VERSION "3.10"
66 #define DRV_RELDATE "August 26, 2008"
67 #define DRV_AUTHOR "David S. Miller (davem@davemloft.net)"
68
69 static char version[] =
70 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
71
72 MODULE_VERSION(DRV_VERSION);
73 MODULE_AUTHOR(DRV_AUTHOR);
74 MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
75 MODULE_LICENSE("GPL");
76
77 static int macaddr[6];
78
79 /* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
80 module_param_array(macaddr, int, NULL, 0);
81 MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
82
83 #ifdef CONFIG_SBUS
84 static struct quattro *qfe_sbus_list;
85 #endif
86
87 #ifdef CONFIG_PCI
88 static struct quattro *qfe_pci_list;
89 #endif
90
91 #undef HMEDEBUG
92 #undef SXDEBUG
93 #undef RXDEBUG
94 #undef TXDEBUG
95 #undef TXLOGGING
96
97 #ifdef TXLOGGING
98 struct hme_tx_logent {
99 unsigned int tstamp;
100 int tx_new, tx_old;
101 unsigned int action;
102 #define TXLOG_ACTION_IRQ 0x01
103 #define TXLOG_ACTION_TXMIT 0x02
104 #define TXLOG_ACTION_TBUSY 0x04
105 #define TXLOG_ACTION_NBUFS 0x08
106 unsigned int status;
107 };
108 #define TX_LOG_LEN 128
109 static struct hme_tx_logent tx_log[TX_LOG_LEN];
110 static int txlog_cur_entry;
111 static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
112 {
113 struct hme_tx_logent *tlp;
114 unsigned long flags;
115
116 local_irq_save(flags);
117 tlp = &tx_log[txlog_cur_entry];
118 tlp->tstamp = (unsigned int)jiffies;
119 tlp->tx_new = hp->tx_new;
120 tlp->tx_old = hp->tx_old;
121 tlp->action = a;
122 tlp->status = s;
123 txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
124 local_irq_restore(flags);
125 }
126 static __inline__ void tx_dump_log(void)
127 {
128 int i, this;
129
130 this = txlog_cur_entry;
131 for (i = 0; i < TX_LOG_LEN; i++) {
132 printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
133 tx_log[this].tstamp,
134 tx_log[this].tx_new, tx_log[this].tx_old,
135 tx_log[this].action, tx_log[this].status);
136 this = (this + 1) & (TX_LOG_LEN - 1);
137 }
138 }
139 static __inline__ void tx_dump_ring(struct happy_meal *hp)
140 {
141 struct hmeal_init_block *hb = hp->happy_block;
142 struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
143 int i;
144
145 for (i = 0; i < TX_RING_SIZE; i+=4) {
146 printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
147 i, i + 4,
148 le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
149 le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
150 le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
151 le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
152 }
153 }
154 #else
155 #define tx_add_log(hp, a, s) do { } while(0)
156 #define tx_dump_log() do { } while(0)
157 #define tx_dump_ring(hp) do { } while(0)
158 #endif
159
160 #ifdef HMEDEBUG
161 #define HMD(x) printk x
162 #else
163 #define HMD(x)
164 #endif
165
166 /* #define AUTO_SWITCH_DEBUG */
167
168 #ifdef AUTO_SWITCH_DEBUG
169 #define ASD(x) printk x
170 #else
171 #define ASD(x)
172 #endif
173
174 #define DEFAULT_IPG0 16 /* For lance-mode only */
175 #define DEFAULT_IPG1 8 /* For all modes */
176 #define DEFAULT_IPG2 4 /* For all modes */
177 #define DEFAULT_JAMSIZE 4 /* Toe jam */
178
179 /* NOTE: In the descriptor writes one _must_ write the address
180 * member _first_. The card must not be allowed to see
181 * the updated descriptor flags until the address is
182 * correct. I've added a write memory barrier between
183 * the two stores so that I can sleep well at night... -DaveM
184 */
185
186 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
187 static void sbus_hme_write32(void __iomem *reg, u32 val)
188 {
189 sbus_writel(val, reg);
190 }
191
192 static u32 sbus_hme_read32(void __iomem *reg)
193 {
194 return sbus_readl(reg);
195 }
196
197 static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
198 {
199 rxd->rx_addr = (__force hme32)addr;
200 wmb();
201 rxd->rx_flags = (__force hme32)flags;
202 }
203
204 static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
205 {
206 txd->tx_addr = (__force hme32)addr;
207 wmb();
208 txd->tx_flags = (__force hme32)flags;
209 }
210
211 static u32 sbus_hme_read_desc32(hme32 *p)
212 {
213 return (__force u32)*p;
214 }
215
216 static void pci_hme_write32(void __iomem *reg, u32 val)
217 {
218 writel(val, reg);
219 }
220
221 static u32 pci_hme_read32(void __iomem *reg)
222 {
223 return readl(reg);
224 }
225
226 static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
227 {
228 rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
229 wmb();
230 rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
231 }
232
233 static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
234 {
235 txd->tx_addr = (__force hme32)cpu_to_le32(addr);
236 wmb();
237 txd->tx_flags = (__force hme32)cpu_to_le32(flags);
238 }
239
240 static u32 pci_hme_read_desc32(hme32 *p)
241 {
242 return le32_to_cpup((__le32 *)p);
243 }
244
245 #define hme_write32(__hp, __reg, __val) \
246 ((__hp)->write32((__reg), (__val)))
247 #define hme_read32(__hp, __reg) \
248 ((__hp)->read32(__reg))
249 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
250 ((__hp)->write_rxd((__rxd), (__flags), (__addr)))
251 #define hme_write_txd(__hp, __txd, __flags, __addr) \
252 ((__hp)->write_txd((__txd), (__flags), (__addr)))
253 #define hme_read_desc32(__hp, __p) \
254 ((__hp)->read_desc32(__p))
255 #define hme_dma_map(__hp, __ptr, __size, __dir) \
256 ((__hp)->dma_map((__hp)->dma_dev, (__ptr), (__size), (__dir)))
257 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
258 ((__hp)->dma_unmap((__hp)->dma_dev, (__addr), (__size), (__dir)))
259 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
260 ((__hp)->dma_sync_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir)))
261 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
262 ((__hp)->dma_sync_for_device((__hp)->dma_dev, (__addr), (__size), (__dir)))
263 #else
264 #ifdef CONFIG_SBUS
265 /* SBUS only compilation */
266 #define hme_write32(__hp, __reg, __val) \
267 sbus_writel((__val), (__reg))
268 #define hme_read32(__hp, __reg) \
269 sbus_readl(__reg)
270 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
271 do { (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
272 wmb(); \
273 (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
274 } while(0)
275 #define hme_write_txd(__hp, __txd, __flags, __addr) \
276 do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
277 wmb(); \
278 (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
279 } while(0)
280 #define hme_read_desc32(__hp, __p) ((__force u32)(hme32)*(__p))
281 #define hme_dma_map(__hp, __ptr, __size, __dir) \
282 dma_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
283 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
284 dma_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
285 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
286 dma_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
287 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
288 dma_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
289 #else
290 /* PCI only compilation */
291 #define hme_write32(__hp, __reg, __val) \
292 writel((__val), (__reg))
293 #define hme_read32(__hp, __reg) \
294 readl(__reg)
295 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
296 do { (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
297 wmb(); \
298 (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
299 } while(0)
300 #define hme_write_txd(__hp, __txd, __flags, __addr) \
301 do { (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
302 wmb(); \
303 (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
304 } while(0)
305 static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
306 {
307 return le32_to_cpup((__le32 *)p);
308 }
309 #define hme_dma_map(__hp, __ptr, __size, __dir) \
310 pci_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
311 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
312 pci_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
313 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
314 pci_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
315 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
316 pci_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
317 #endif
318 #endif
319
320
321 /* Oh yes, the MIF BitBang is mighty fun to program. BitBucket is more like it. */
322 static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
323 {
324 hme_write32(hp, tregs + TCVR_BBDATA, bit);
325 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
326 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
327 }
328
329 #if 0
330 static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
331 {
332 u32 ret;
333
334 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
335 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
336 ret = hme_read32(hp, tregs + TCVR_CFG);
337 if (internal)
338 ret &= TCV_CFG_MDIO0;
339 else
340 ret &= TCV_CFG_MDIO1;
341
342 return ret;
343 }
344 #endif
345
346 static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
347 {
348 u32 retval;
349
350 hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
351 udelay(1);
352 retval = hme_read32(hp, tregs + TCVR_CFG);
353 if (internal)
354 retval &= TCV_CFG_MDIO0;
355 else
356 retval &= TCV_CFG_MDIO1;
357 hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
358
359 return retval;
360 }
361
362 #define TCVR_FAILURE 0x80000000 /* Impossible MIF read value */
363
364 static int happy_meal_bb_read(struct happy_meal *hp,
365 void __iomem *tregs, int reg)
366 {
367 u32 tmp;
368 int retval = 0;
369 int i;
370
371 ASD(("happy_meal_bb_read: reg=%d ", reg));
372
373 /* Enable the MIF BitBang outputs. */
374 hme_write32(hp, tregs + TCVR_BBOENAB, 1);
375
376 /* Force BitBang into the idle state. */
377 for (i = 0; i < 32; i++)
378 BB_PUT_BIT(hp, tregs, 1);
379
380 /* Give it the read sequence. */
381 BB_PUT_BIT(hp, tregs, 0);
382 BB_PUT_BIT(hp, tregs, 1);
383 BB_PUT_BIT(hp, tregs, 1);
384 BB_PUT_BIT(hp, tregs, 0);
385
386 /* Give it the PHY address. */
387 tmp = hp->paddr & 0xff;
388 for (i = 4; i >= 0; i--)
389 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
390
391 /* Tell it what register we want to read. */
392 tmp = (reg & 0xff);
393 for (i = 4; i >= 0; i--)
394 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
395
396 /* Close down the MIF BitBang outputs. */
397 hme_write32(hp, tregs + TCVR_BBOENAB, 0);
398
399 /* Now read in the value. */
400 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
401 for (i = 15; i >= 0; i--)
402 retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
403 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
404 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
405 (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
406 ASD(("value=%x\n", retval));
407 return retval;
408 }
409
410 static void happy_meal_bb_write(struct happy_meal *hp,
411 void __iomem *tregs, int reg,
412 unsigned short value)
413 {
414 u32 tmp;
415 int i;
416
417 ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));
418
419 /* Enable the MIF BitBang outputs. */
420 hme_write32(hp, tregs + TCVR_BBOENAB, 1);
421
422 /* Force BitBang into the idle state. */
423 for (i = 0; i < 32; i++)
424 BB_PUT_BIT(hp, tregs, 1);
425
426 /* Give it write sequence. */
427 BB_PUT_BIT(hp, tregs, 0);
428 BB_PUT_BIT(hp, tregs, 1);
429 BB_PUT_BIT(hp, tregs, 0);
430 BB_PUT_BIT(hp, tregs, 1);
431
432 /* Give it the PHY address. */
433 tmp = (hp->paddr & 0xff);
434 for (i = 4; i >= 0; i--)
435 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
436
437 /* Tell it what register we will be writing. */
438 tmp = (reg & 0xff);
439 for (i = 4; i >= 0; i--)
440 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
441
442 /* Tell it to become ready for the bits. */
443 BB_PUT_BIT(hp, tregs, 1);
444 BB_PUT_BIT(hp, tregs, 0);
445
446 for (i = 15; i >= 0; i--)
447 BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
448
449 /* Close down the MIF BitBang outputs. */
450 hme_write32(hp, tregs + TCVR_BBOENAB, 0);
451 }
452
453 #define TCVR_READ_TRIES 16
454
455 static int happy_meal_tcvr_read(struct happy_meal *hp,
456 void __iomem *tregs, int reg)
457 {
458 int tries = TCVR_READ_TRIES;
459 int retval;
460
461 ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
462 if (hp->tcvr_type == none) {
463 ASD(("no transceiver, value=TCVR_FAILURE\n"));
464 return TCVR_FAILURE;
465 }
466
467 if (!(hp->happy_flags & HFLAG_FENABLE)) {
468 ASD(("doing bit bang\n"));
469 return happy_meal_bb_read(hp, tregs, reg);
470 }
471
472 hme_write32(hp, tregs + TCVR_FRAME,
473 (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
474 while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
475 udelay(20);
476 if (!tries) {
477 printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
478 return TCVR_FAILURE;
479 }
480 retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
481 ASD(("value=%04x\n", retval));
482 return retval;
483 }
484
485 #define TCVR_WRITE_TRIES 16
486
487 static void happy_meal_tcvr_write(struct happy_meal *hp,
488 void __iomem *tregs, int reg,
489 unsigned short value)
490 {
491 int tries = TCVR_WRITE_TRIES;
492
493 ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));
494
495 /* Welcome to Sun Microsystems, can I take your order please? */
496 if (!(hp->happy_flags & HFLAG_FENABLE)) {
497 happy_meal_bb_write(hp, tregs, reg, value);
498 return;
499 }
500
501 /* Would you like fries with that? */
502 hme_write32(hp, tregs + TCVR_FRAME,
503 (FRAME_WRITE | (hp->paddr << 23) |
504 ((reg & 0xff) << 18) | (value & 0xffff)));
505 while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
506 udelay(20);
507
508 /* Anything else? */
509 if (!tries)
510 printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");
511
512 /* Fifty-two cents is your change, have a nice day. */
513 }
514
515 /* Auto negotiation. The scheme is very simple. We have a timer routine
516 * that keeps watching the auto negotiation process as it progresses.
517 * The DP83840 is first told to start doing it's thing, we set up the time
518 * and place the timer state machine in it's initial state.
519 *
520 * Here the timer peeks at the DP83840 status registers at each click to see
521 * if the auto negotiation has completed, we assume here that the DP83840 PHY
522 * will time out at some point and just tell us what (didn't) happen. For
523 * complete coverage we only allow so many of the ticks at this level to run,
524 * when this has expired we print a warning message and try another strategy.
525 * This "other" strategy is to force the interface into various speed/duplex
526 * configurations and we stop when we see a link-up condition before the
527 * maximum number of "peek" ticks have occurred.
528 *
529 * Once a valid link status has been detected we configure the BigMAC and
530 * the rest of the Happy Meal to speak the most efficient protocol we could
531 * get a clean link for. The priority for link configurations, highest first
532 * is:
533 * 100 Base-T Full Duplex
534 * 100 Base-T Half Duplex
535 * 10 Base-T Full Duplex
536 * 10 Base-T Half Duplex
537 *
538 * We start a new timer now, after a successful auto negotiation status has
539 * been detected. This timer just waits for the link-up bit to get set in
540 * the BMCR of the DP83840. When this occurs we print a kernel log message
541 * describing the link type in use and the fact that it is up.
542 *
543 * If a fatal error of some sort is signalled and detected in the interrupt
544 * service routine, and the chip is reset, or the link is ifconfig'd down
545 * and then back up, this entire process repeats itself all over again.
546 */
547 static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
548 {
549 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
550
551 /* Downgrade from full to half duplex. Only possible
552 * via ethtool.
553 */
554 if (hp->sw_bmcr & BMCR_FULLDPLX) {
555 hp->sw_bmcr &= ~(BMCR_FULLDPLX);
556 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
557 return 0;
558 }
559
560 /* Downgrade from 100 to 10. */
561 if (hp->sw_bmcr & BMCR_SPEED100) {
562 hp->sw_bmcr &= ~(BMCR_SPEED100);
563 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
564 return 0;
565 }
566
567 /* We've tried everything. */
568 return -1;
569 }
570
571 static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
572 {
573 printk(KERN_INFO "%s: Link is up using ", hp->dev->name);
574 if (hp->tcvr_type == external)
575 printk("external ");
576 else
577 printk("internal ");
578 printk("transceiver at ");
579 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
580 if (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) {
581 if (hp->sw_lpa & LPA_100FULL)
582 printk("100Mb/s, Full Duplex.\n");
583 else
584 printk("100Mb/s, Half Duplex.\n");
585 } else {
586 if (hp->sw_lpa & LPA_10FULL)
587 printk("10Mb/s, Full Duplex.\n");
588 else
589 printk("10Mb/s, Half Duplex.\n");
590 }
591 }
592
593 static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
594 {
595 printk(KERN_INFO "%s: Link has been forced up using ", hp->dev->name);
596 if (hp->tcvr_type == external)
597 printk("external ");
598 else
599 printk("internal ");
600 printk("transceiver at ");
601 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
602 if (hp->sw_bmcr & BMCR_SPEED100)
603 printk("100Mb/s, ");
604 else
605 printk("10Mb/s, ");
606 if (hp->sw_bmcr & BMCR_FULLDPLX)
607 printk("Full Duplex.\n");
608 else
609 printk("Half Duplex.\n");
610 }
611
612 static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
613 {
614 int full;
615
616 /* All we care about is making sure the bigmac tx_cfg has a
617 * proper duplex setting.
618 */
619 if (hp->timer_state == arbwait) {
620 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
621 if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
622 goto no_response;
623 if (hp->sw_lpa & LPA_100FULL)
624 full = 1;
625 else if (hp->sw_lpa & LPA_100HALF)
626 full = 0;
627 else if (hp->sw_lpa & LPA_10FULL)
628 full = 1;
629 else
630 full = 0;
631 } else {
632 /* Forcing a link mode. */
633 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
634 if (hp->sw_bmcr & BMCR_FULLDPLX)
635 full = 1;
636 else
637 full = 0;
638 }
639
640 /* Before changing other bits in the tx_cfg register, and in
641 * general any of other the TX config registers too, you
642 * must:
643 * 1) Clear Enable
644 * 2) Poll with reads until that bit reads back as zero
645 * 3) Make TX configuration changes
646 * 4) Set Enable once more
647 */
648 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
649 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
650 ~(BIGMAC_TXCFG_ENABLE));
651 while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
652 barrier();
653 if (full) {
654 hp->happy_flags |= HFLAG_FULL;
655 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
656 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
657 BIGMAC_TXCFG_FULLDPLX);
658 } else {
659 hp->happy_flags &= ~(HFLAG_FULL);
660 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
661 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
662 ~(BIGMAC_TXCFG_FULLDPLX));
663 }
664 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
665 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
666 BIGMAC_TXCFG_ENABLE);
667 return 0;
668 no_response:
669 return 1;
670 }
671
672 static int happy_meal_init(struct happy_meal *hp);
673
674 static int is_lucent_phy(struct happy_meal *hp)
675 {
676 void __iomem *tregs = hp->tcvregs;
677 unsigned short mr2, mr3;
678 int ret = 0;
679
680 mr2 = happy_meal_tcvr_read(hp, tregs, 2);
681 mr3 = happy_meal_tcvr_read(hp, tregs, 3);
682 if ((mr2 & 0xffff) == 0x0180 &&
683 ((mr3 & 0xffff) >> 10) == 0x1d)
684 ret = 1;
685
686 return ret;
687 }
688
689 static void happy_meal_timer(unsigned long data)
690 {
691 struct happy_meal *hp = (struct happy_meal *) data;
692 void __iomem *tregs = hp->tcvregs;
693 int restart_timer = 0;
694
695 spin_lock_irq(&hp->happy_lock);
696
697 hp->timer_ticks++;
698 switch(hp->timer_state) {
699 case arbwait:
700 /* Only allow for 5 ticks, thats 10 seconds and much too
701 * long to wait for arbitration to complete.
702 */
703 if (hp->timer_ticks >= 10) {
704 /* Enter force mode. */
705 do_force_mode:
706 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
707 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
708 hp->dev->name);
709 hp->sw_bmcr = BMCR_SPEED100;
710 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
711
712 if (!is_lucent_phy(hp)) {
713 /* OK, seems we need do disable the transceiver for the first
714 * tick to make sure we get an accurate link state at the
715 * second tick.
716 */
717 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
718 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
719 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
720 }
721 hp->timer_state = ltrywait;
722 hp->timer_ticks = 0;
723 restart_timer = 1;
724 } else {
725 /* Anything interesting happen? */
726 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
727 if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
728 int ret;
729
730 /* Just what we've been waiting for... */
731 ret = set_happy_link_modes(hp, tregs);
732 if (ret) {
733 /* Ooops, something bad happened, go to force
734 * mode.
735 *
736 * XXX Broken hubs which don't support 802.3u
737 * XXX auto-negotiation make this happen as well.
738 */
739 goto do_force_mode;
740 }
741
742 /* Success, at least so far, advance our state engine. */
743 hp->timer_state = lupwait;
744 restart_timer = 1;
745 } else {
746 restart_timer = 1;
747 }
748 }
749 break;
750
751 case lupwait:
752 /* Auto negotiation was successful and we are awaiting a
753 * link up status. I have decided to let this timer run
754 * forever until some sort of error is signalled, reporting
755 * a message to the user at 10 second intervals.
756 */
757 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
758 if (hp->sw_bmsr & BMSR_LSTATUS) {
759 /* Wheee, it's up, display the link mode in use and put
760 * the timer to sleep.
761 */
762 display_link_mode(hp, tregs);
763 hp->timer_state = asleep;
764 restart_timer = 0;
765 } else {
766 if (hp->timer_ticks >= 10) {
767 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
768 "not completely up.\n", hp->dev->name);
769 hp->timer_ticks = 0;
770 restart_timer = 1;
771 } else {
772 restart_timer = 1;
773 }
774 }
775 break;
776
777 case ltrywait:
778 /* Making the timeout here too long can make it take
779 * annoyingly long to attempt all of the link mode
780 * permutations, but then again this is essentially
781 * error recovery code for the most part.
782 */
783 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
784 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
785 if (hp->timer_ticks == 1) {
786 if (!is_lucent_phy(hp)) {
787 /* Re-enable transceiver, we'll re-enable the transceiver next
788 * tick, then check link state on the following tick.
789 */
790 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
791 happy_meal_tcvr_write(hp, tregs,
792 DP83840_CSCONFIG, hp->sw_csconfig);
793 }
794 restart_timer = 1;
795 break;
796 }
797 if (hp->timer_ticks == 2) {
798 if (!is_lucent_phy(hp)) {
799 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
800 happy_meal_tcvr_write(hp, tregs,
801 DP83840_CSCONFIG, hp->sw_csconfig);
802 }
803 restart_timer = 1;
804 break;
805 }
806 if (hp->sw_bmsr & BMSR_LSTATUS) {
807 /* Force mode selection success. */
808 display_forced_link_mode(hp, tregs);
809 set_happy_link_modes(hp, tregs); /* XXX error? then what? */
810 hp->timer_state = asleep;
811 restart_timer = 0;
812 } else {
813 if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
814 int ret;
815
816 ret = try_next_permutation(hp, tregs);
817 if (ret == -1) {
818 /* Aieee, tried them all, reset the
819 * chip and try all over again.
820 */
821
822 /* Let the user know... */
823 printk(KERN_NOTICE "%s: Link down, cable problem?\n",
824 hp->dev->name);
825
826 ret = happy_meal_init(hp);
827 if (ret) {
828 /* ho hum... */
829 printk(KERN_ERR "%s: Error, cannot re-init the "
830 "Happy Meal.\n", hp->dev->name);
831 }
832 goto out;
833 }
834 if (!is_lucent_phy(hp)) {
835 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
836 DP83840_CSCONFIG);
837 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
838 happy_meal_tcvr_write(hp, tregs,
839 DP83840_CSCONFIG, hp->sw_csconfig);
840 }
841 hp->timer_ticks = 0;
842 restart_timer = 1;
843 } else {
844 restart_timer = 1;
845 }
846 }
847 break;
848
849 case asleep:
850 default:
851 /* Can't happens.... */
852 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
853 hp->dev->name);
854 restart_timer = 0;
855 hp->timer_ticks = 0;
856 hp->timer_state = asleep; /* foo on you */
857 break;
858 }
859
860 if (restart_timer) {
861 hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
862 add_timer(&hp->happy_timer);
863 }
864
865 out:
866 spin_unlock_irq(&hp->happy_lock);
867 }
868
869 #define TX_RESET_TRIES 32
870 #define RX_RESET_TRIES 32
871
872 /* hp->happy_lock must be held */
873 static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
874 {
875 int tries = TX_RESET_TRIES;
876
877 HMD(("happy_meal_tx_reset: reset, "));
878
879 /* Would you like to try our SMCC Delux? */
880 hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
881 while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
882 udelay(20);
883
884 /* Lettuce, tomato, buggy hardware (no extra charge)? */
885 if (!tries)
886 printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");
887
888 /* Take care. */
889 HMD(("done\n"));
890 }
891
892 /* hp->happy_lock must be held */
893 static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
894 {
895 int tries = RX_RESET_TRIES;
896
897 HMD(("happy_meal_rx_reset: reset, "));
898
899 /* We have a special on GNU/Viking hardware bugs today. */
900 hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
901 while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
902 udelay(20);
903
904 /* Will that be all? */
905 if (!tries)
906 printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");
907
908 /* Don't forget your vik_1137125_wa. Have a nice day. */
909 HMD(("done\n"));
910 }
911
912 #define STOP_TRIES 16
913
914 /* hp->happy_lock must be held */
915 static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
916 {
917 int tries = STOP_TRIES;
918
919 HMD(("happy_meal_stop: reset, "));
920
921 /* We're consolidating our STB products, it's your lucky day. */
922 hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
923 while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
924 udelay(20);
925
926 /* Come back next week when we are "Sun Microelectronics". */
927 if (!tries)
928 printk(KERN_ERR "happy meal: Fry guys.");
929
930 /* Remember: "Different name, same old buggy as shit hardware." */
931 HMD(("done\n"));
932 }
933
934 /* hp->happy_lock must be held */
935 static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
936 {
937 struct net_device_stats *stats = &hp->net_stats;
938
939 stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
940 hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
941
942 stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
943 hme_write32(hp, bregs + BMAC_UNALECTR, 0);
944
945 stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
946 hme_write32(hp, bregs + BMAC_GLECTR, 0);
947
948 stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
949
950 stats->collisions +=
951 (hme_read32(hp, bregs + BMAC_EXCTR) +
952 hme_read32(hp, bregs + BMAC_LTCTR));
953 hme_write32(hp, bregs + BMAC_EXCTR, 0);
954 hme_write32(hp, bregs + BMAC_LTCTR, 0);
955 }
956
957 /* hp->happy_lock must be held */
958 static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
959 {
960 ASD(("happy_meal_poll_stop: "));
961
962 /* If polling disabled or not polling already, nothing to do. */
963 if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
964 (HFLAG_POLLENABLE | HFLAG_POLL)) {
965 HMD(("not polling, return\n"));
966 return;
967 }
968
969 /* Shut up the MIF. */
970 ASD(("were polling, mif ints off, "));
971 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
972
973 /* Turn off polling. */
974 ASD(("polling off, "));
975 hme_write32(hp, tregs + TCVR_CFG,
976 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
977
978 /* We are no longer polling. */
979 hp->happy_flags &= ~(HFLAG_POLL);
980
981 /* Let the bits set. */
982 udelay(200);
983 ASD(("done\n"));
984 }
985
986 /* Only Sun can take such nice parts and fuck up the programming interface
987 * like this. Good job guys...
988 */
989 #define TCVR_RESET_TRIES 16 /* It should reset quickly */
990 #define TCVR_UNISOLATE_TRIES 32 /* Dis-isolation can take longer. */
991
992 /* hp->happy_lock must be held */
993 static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
994 {
995 u32 tconfig;
996 int result, tries = TCVR_RESET_TRIES;
997
998 tconfig = hme_read32(hp, tregs + TCVR_CFG);
999 ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
1000 if (hp->tcvr_type == external) {
1001 ASD(("external<"));
1002 hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
1003 hp->tcvr_type = internal;
1004 hp->paddr = TCV_PADDR_ITX;
1005 ASD(("ISOLATE,"));
1006 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1007 (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1008 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1009 if (result == TCVR_FAILURE) {
1010 ASD(("phyread_fail>\n"));
1011 return -1;
1012 }
1013 ASD(("phyread_ok,PSELECT>"));
1014 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1015 hp->tcvr_type = external;
1016 hp->paddr = TCV_PADDR_ETX;
1017 } else {
1018 if (tconfig & TCV_CFG_MDIO1) {
1019 ASD(("internal<PSELECT,"));
1020 hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
1021 ASD(("ISOLATE,"));
1022 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1023 (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1024 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1025 if (result == TCVR_FAILURE) {
1026 ASD(("phyread_fail>\n"));
1027 return -1;
1028 }
1029 ASD(("phyread_ok,~PSELECT>"));
1030 hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
1031 hp->tcvr_type = internal;
1032 hp->paddr = TCV_PADDR_ITX;
1033 }
1034 }
1035
1036 ASD(("BMCR_RESET "));
1037 happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
1038
1039 while (--tries) {
1040 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1041 if (result == TCVR_FAILURE)
1042 return -1;
1043 hp->sw_bmcr = result;
1044 if (!(result & BMCR_RESET))
1045 break;
1046 udelay(20);
1047 }
1048 if (!tries) {
1049 ASD(("BMCR RESET FAILED!\n"));
1050 return -1;
1051 }
1052 ASD(("RESET_OK\n"));
1053
1054 /* Get fresh copies of the PHY registers. */
1055 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1056 hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1057 hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1058 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1059
1060 ASD(("UNISOLATE"));
1061 hp->sw_bmcr &= ~(BMCR_ISOLATE);
1062 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1063
1064 tries = TCVR_UNISOLATE_TRIES;
1065 while (--tries) {
1066 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1067 if (result == TCVR_FAILURE)
1068 return -1;
1069 if (!(result & BMCR_ISOLATE))
1070 break;
1071 udelay(20);
1072 }
1073 if (!tries) {
1074 ASD((" FAILED!\n"));
1075 return -1;
1076 }
1077 ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
1078 if (!is_lucent_phy(hp)) {
1079 result = happy_meal_tcvr_read(hp, tregs,
1080 DP83840_CSCONFIG);
1081 happy_meal_tcvr_write(hp, tregs,
1082 DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
1083 }
1084 return 0;
1085 }
1086
1087 /* Figure out whether we have an internal or external transceiver.
1088 *
1089 * hp->happy_lock must be held
1090 */
1091 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
1092 {
1093 unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
1094
1095 ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
1096 if (hp->happy_flags & HFLAG_POLL) {
1097 /* If we are polling, we must stop to get the transceiver type. */
1098 ASD(("<polling> "));
1099 if (hp->tcvr_type == internal) {
1100 if (tconfig & TCV_CFG_MDIO1) {
1101 ASD(("<internal> <poll stop> "));
1102 happy_meal_poll_stop(hp, tregs);
1103 hp->paddr = TCV_PADDR_ETX;
1104 hp->tcvr_type = external;
1105 ASD(("<external>\n"));
1106 tconfig &= ~(TCV_CFG_PENABLE);
1107 tconfig |= TCV_CFG_PSELECT;
1108 hme_write32(hp, tregs + TCVR_CFG, tconfig);
1109 }
1110 } else {
1111 if (hp->tcvr_type == external) {
1112 ASD(("<external> "));
1113 if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
1114 ASD(("<poll stop> "));
1115 happy_meal_poll_stop(hp, tregs);
1116 hp->paddr = TCV_PADDR_ITX;
1117 hp->tcvr_type = internal;
1118 ASD(("<internal>\n"));
1119 hme_write32(hp, tregs + TCVR_CFG,
1120 hme_read32(hp, tregs + TCVR_CFG) &
1121 ~(TCV_CFG_PSELECT));
1122 }
1123 ASD(("\n"));
1124 } else {
1125 ASD(("<none>\n"));
1126 }
1127 }
1128 } else {
1129 u32 reread = hme_read32(hp, tregs + TCVR_CFG);
1130
1131 /* Else we can just work off of the MDIO bits. */
1132 ASD(("<not polling> "));
1133 if (reread & TCV_CFG_MDIO1) {
1134 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1135 hp->paddr = TCV_PADDR_ETX;
1136 hp->tcvr_type = external;
1137 ASD(("<external>\n"));
1138 } else {
1139 if (reread & TCV_CFG_MDIO0) {
1140 hme_write32(hp, tregs + TCVR_CFG,
1141 tconfig & ~(TCV_CFG_PSELECT));
1142 hp->paddr = TCV_PADDR_ITX;
1143 hp->tcvr_type = internal;
1144 ASD(("<internal>\n"));
1145 } else {
1146 printk(KERN_ERR "happy meal: Transceiver and a coke please.");
1147 hp->tcvr_type = none; /* Grrr... */
1148 ASD(("<none>\n"));
1149 }
1150 }
1151 }
1152 }
1153
1154 /* The receive ring buffers are a bit tricky to get right. Here goes...
1155 *
1156 * The buffers we dma into must be 64 byte aligned. So we use a special
1157 * alloc_skb() routine for the happy meal to allocate 64 bytes more than
1158 * we really need.
1159 *
1160 * We use skb_reserve() to align the data block we get in the skb. We
1161 * also program the etxregs->cfg register to use an offset of 2. This
1162 * imperical constant plus the ethernet header size will always leave
1163 * us with a nicely aligned ip header once we pass things up to the
1164 * protocol layers.
1165 *
1166 * The numbers work out to:
1167 *
1168 * Max ethernet frame size 1518
1169 * Ethernet header size 14
1170 * Happy Meal base offset 2
1171 *
1172 * Say a skb data area is at 0xf001b010, and its size alloced is
1173 * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
1174 *
1175 * First our alloc_skb() routine aligns the data base to a 64 byte
1176 * boundary. We now have 0xf001b040 as our skb data address. We
1177 * plug this into the receive descriptor address.
1178 *
1179 * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
1180 * So now the data we will end up looking at starts at 0xf001b042. When
1181 * the packet arrives, we will check out the size received and subtract
1182 * this from the skb->length. Then we just pass the packet up to the
1183 * protocols as is, and allocate a new skb to replace this slot we have
1184 * just received from.
1185 *
1186 * The ethernet layer will strip the ether header from the front of the
1187 * skb we just sent to it, this leaves us with the ip header sitting
1188 * nicely aligned at 0xf001b050. Also, for tcp and udp packets the
1189 * Happy Meal has even checksummed the tcp/udp data for us. The 16
1190 * bit checksum is obtained from the low bits of the receive descriptor
1191 * flags, thus:
1192 *
1193 * skb->csum = rxd->rx_flags & 0xffff;
1194 * skb->ip_summed = CHECKSUM_COMPLETE;
1195 *
1196 * before sending off the skb to the protocols, and we are good as gold.
1197 */
1198 static void happy_meal_clean_rings(struct happy_meal *hp)
1199 {
1200 int i;
1201
1202 for (i = 0; i < RX_RING_SIZE; i++) {
1203 if (hp->rx_skbs[i] != NULL) {
1204 struct sk_buff *skb = hp->rx_skbs[i];
1205 struct happy_meal_rxd *rxd;
1206 u32 dma_addr;
1207
1208 rxd = &hp->happy_block->happy_meal_rxd[i];
1209 dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
1210 dma_unmap_single(hp->dma_dev, dma_addr,
1211 RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
1212 dev_kfree_skb_any(skb);
1213 hp->rx_skbs[i] = NULL;
1214 }
1215 }
1216
1217 for (i = 0; i < TX_RING_SIZE; i++) {
1218 if (hp->tx_skbs[i] != NULL) {
1219 struct sk_buff *skb = hp->tx_skbs[i];
1220 struct happy_meal_txd *txd;
1221 u32 dma_addr;
1222 int frag;
1223
1224 hp->tx_skbs[i] = NULL;
1225
1226 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1227 txd = &hp->happy_block->happy_meal_txd[i];
1228 dma_addr = hme_read_desc32(hp, &txd->tx_addr);
1229 if (!frag)
1230 dma_unmap_single(hp->dma_dev, dma_addr,
1231 (hme_read_desc32(hp, &txd->tx_flags)
1232 & TXFLAG_SIZE),
1233 DMA_TO_DEVICE);
1234 else
1235 dma_unmap_page(hp->dma_dev, dma_addr,
1236 (hme_read_desc32(hp, &txd->tx_flags)
1237 & TXFLAG_SIZE),
1238 DMA_TO_DEVICE);
1239
1240 if (frag != skb_shinfo(skb)->nr_frags)
1241 i++;
1242 }
1243
1244 dev_kfree_skb_any(skb);
1245 }
1246 }
1247 }
1248
1249 /* hp->happy_lock must be held */
1250 static void happy_meal_init_rings(struct happy_meal *hp)
1251 {
1252 struct hmeal_init_block *hb = hp->happy_block;
1253 struct net_device *dev = hp->dev;
1254 int i;
1255
1256 HMD(("happy_meal_init_rings: counters to zero, "));
1257 hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
1258
1259 /* Free any skippy bufs left around in the rings. */
1260 HMD(("clean, "));
1261 happy_meal_clean_rings(hp);
1262
1263 /* Now get new skippy bufs for the receive ring. */
1264 HMD(("init rxring, "));
1265 for (i = 0; i < RX_RING_SIZE; i++) {
1266 struct sk_buff *skb;
1267
1268 skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
1269 if (!skb) {
1270 hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
1271 continue;
1272 }
1273 hp->rx_skbs[i] = skb;
1274 skb->dev = dev;
1275
1276 /* Because we reserve afterwards. */
1277 skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
1278 hme_write_rxd(hp, &hb->happy_meal_rxd[i],
1279 (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
1280 dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
1281 DMA_FROM_DEVICE));
1282 skb_reserve(skb, RX_OFFSET);
1283 }
1284
1285 HMD(("init txring, "));
1286 for (i = 0; i < TX_RING_SIZE; i++)
1287 hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
1288
1289 HMD(("done\n"));
1290 }
1291
1292 /* hp->happy_lock must be held */
1293 static void happy_meal_begin_auto_negotiation(struct happy_meal *hp,
1294 void __iomem *tregs,
1295 struct ethtool_cmd *ep)
1296 {
1297 int timeout;
1298
1299 /* Read all of the registers we are interested in now. */
1300 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1301 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1302 hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1303 hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1304
1305 /* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
1306
1307 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1308 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1309 /* Advertise everything we can support. */
1310 if (hp->sw_bmsr & BMSR_10HALF)
1311 hp->sw_advertise |= (ADVERTISE_10HALF);
1312 else
1313 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1314
1315 if (hp->sw_bmsr & BMSR_10FULL)
1316 hp->sw_advertise |= (ADVERTISE_10FULL);
1317 else
1318 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1319 if (hp->sw_bmsr & BMSR_100HALF)
1320 hp->sw_advertise |= (ADVERTISE_100HALF);
1321 else
1322 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1323 if (hp->sw_bmsr & BMSR_100FULL)
1324 hp->sw_advertise |= (ADVERTISE_100FULL);
1325 else
1326 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1327 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1328
1329 /* XXX Currently no Happy Meal cards I know off support 100BaseT4,
1330 * XXX and this is because the DP83840 does not support it, changes
1331 * XXX would need to be made to the tx/rx logic in the driver as well
1332 * XXX so I completely skip checking for it in the BMSR for now.
1333 */
1334
1335 #ifdef AUTO_SWITCH_DEBUG
1336 ASD(("%s: Advertising [ ", hp->dev->name));
1337 if (hp->sw_advertise & ADVERTISE_10HALF)
1338 ASD(("10H "));
1339 if (hp->sw_advertise & ADVERTISE_10FULL)
1340 ASD(("10F "));
1341 if (hp->sw_advertise & ADVERTISE_100HALF)
1342 ASD(("100H "));
1343 if (hp->sw_advertise & ADVERTISE_100FULL)
1344 ASD(("100F "));
1345 #endif
1346
1347 /* Enable Auto-Negotiation, this is usually on already... */
1348 hp->sw_bmcr |= BMCR_ANENABLE;
1349 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1350
1351 /* Restart it to make sure it is going. */
1352 hp->sw_bmcr |= BMCR_ANRESTART;
1353 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1354
1355 /* BMCR_ANRESTART self clears when the process has begun. */
1356
1357 timeout = 64; /* More than enough. */
1358 while (--timeout) {
1359 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1360 if (!(hp->sw_bmcr & BMCR_ANRESTART))
1361 break; /* got it. */
1362 udelay(10);
1363 }
1364 if (!timeout) {
1365 printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
1366 "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
1367 printk(KERN_NOTICE "%s: Performing force link detection.\n",
1368 hp->dev->name);
1369 goto force_link;
1370 } else {
1371 hp->timer_state = arbwait;
1372 }
1373 } else {
1374 force_link:
1375 /* Force the link up, trying first a particular mode.
1376 * Either we are here at the request of ethtool or
1377 * because the Happy Meal would not start to autoneg.
1378 */
1379
1380 /* Disable auto-negotiation in BMCR, enable the duplex and
1381 * speed setting, init the timer state machine, and fire it off.
1382 */
1383 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
1384 hp->sw_bmcr = BMCR_SPEED100;
1385 } else {
1386 if (ethtool_cmd_speed(ep) == SPEED_100)
1387 hp->sw_bmcr = BMCR_SPEED100;
1388 else
1389 hp->sw_bmcr = 0;
1390 if (ep->duplex == DUPLEX_FULL)
1391 hp->sw_bmcr |= BMCR_FULLDPLX;
1392 }
1393 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1394
1395 if (!is_lucent_phy(hp)) {
1396 /* OK, seems we need do disable the transceiver for the first
1397 * tick to make sure we get an accurate link state at the
1398 * second tick.
1399 */
1400 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
1401 DP83840_CSCONFIG);
1402 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
1403 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
1404 hp->sw_csconfig);
1405 }
1406 hp->timer_state = ltrywait;
1407 }
1408
1409 hp->timer_ticks = 0;
1410 hp->happy_timer.expires = jiffies + (12 * HZ)/10; /* 1.2 sec. */
1411 hp->happy_timer.data = (unsigned long) hp;
1412 hp->happy_timer.function = happy_meal_timer;
1413 add_timer(&hp->happy_timer);
1414 }
1415
1416 /* hp->happy_lock must be held */
1417 static int happy_meal_init(struct happy_meal *hp)
1418 {
1419 void __iomem *gregs = hp->gregs;
1420 void __iomem *etxregs = hp->etxregs;
1421 void __iomem *erxregs = hp->erxregs;
1422 void __iomem *bregs = hp->bigmacregs;
1423 void __iomem *tregs = hp->tcvregs;
1424 u32 regtmp, rxcfg;
1425 unsigned char *e = &hp->dev->dev_addr[0];
1426
1427 /* If auto-negotiation timer is running, kill it. */
1428 del_timer(&hp->happy_timer);
1429
1430 HMD(("happy_meal_init: happy_flags[%08x] ",
1431 hp->happy_flags));
1432 if (!(hp->happy_flags & HFLAG_INIT)) {
1433 HMD(("set HFLAG_INIT, "));
1434 hp->happy_flags |= HFLAG_INIT;
1435 happy_meal_get_counters(hp, bregs);
1436 }
1437
1438 /* Stop polling. */
1439 HMD(("to happy_meal_poll_stop\n"));
1440 happy_meal_poll_stop(hp, tregs);
1441
1442 /* Stop transmitter and receiver. */
1443 HMD(("happy_meal_init: to happy_meal_stop\n"));
1444 happy_meal_stop(hp, gregs);
1445
1446 /* Alloc and reset the tx/rx descriptor chains. */
1447 HMD(("happy_meal_init: to happy_meal_init_rings\n"));
1448 happy_meal_init_rings(hp);
1449
1450 /* Shut up the MIF. */
1451 HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
1452 hme_read32(hp, tregs + TCVR_IMASK)));
1453 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1454
1455 /* See if we can enable the MIF frame on this card to speak to the DP83840. */
1456 if (hp->happy_flags & HFLAG_FENABLE) {
1457 HMD(("use frame old[%08x], ",
1458 hme_read32(hp, tregs + TCVR_CFG)));
1459 hme_write32(hp, tregs + TCVR_CFG,
1460 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1461 } else {
1462 HMD(("use bitbang old[%08x], ",
1463 hme_read32(hp, tregs + TCVR_CFG)));
1464 hme_write32(hp, tregs + TCVR_CFG,
1465 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1466 }
1467
1468 /* Check the state of the transceiver. */
1469 HMD(("to happy_meal_transceiver_check\n"));
1470 happy_meal_transceiver_check(hp, tregs);
1471
1472 /* Put the Big Mac into a sane state. */
1473 HMD(("happy_meal_init: "));
1474 switch(hp->tcvr_type) {
1475 case none:
1476 /* Cannot operate if we don't know the transceiver type! */
1477 HMD(("AAIEEE no transceiver type, EAGAIN"));
1478 return -EAGAIN;
1479
1480 case internal:
1481 /* Using the MII buffers. */
1482 HMD(("internal, using MII, "));
1483 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1484 break;
1485
1486 case external:
1487 /* Not using the MII, disable it. */
1488 HMD(("external, disable MII, "));
1489 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1490 break;
1491 }
1492
1493 if (happy_meal_tcvr_reset(hp, tregs))
1494 return -EAGAIN;
1495
1496 /* Reset the Happy Meal Big Mac transceiver and the receiver. */
1497 HMD(("tx/rx reset, "));
1498 happy_meal_tx_reset(hp, bregs);
1499 happy_meal_rx_reset(hp, bregs);
1500
1501 /* Set jam size and inter-packet gaps to reasonable defaults. */
1502 HMD(("jsize/ipg1/ipg2, "));
1503 hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
1504 hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
1505 hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
1506
1507 /* Load up the MAC address and random seed. */
1508 HMD(("rseed/macaddr, "));
1509
1510 /* The docs recommend to use the 10LSB of our MAC here. */
1511 hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
1512
1513 hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
1514 hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
1515 hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
1516
1517 HMD(("htable, "));
1518 if ((hp->dev->flags & IFF_ALLMULTI) ||
1519 (netdev_mc_count(hp->dev) > 64)) {
1520 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
1521 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
1522 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
1523 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
1524 } else if ((hp->dev->flags & IFF_PROMISC) == 0) {
1525 u16 hash_table[4];
1526 struct netdev_hw_addr *ha;
1527 u32 crc;
1528
1529 memset(hash_table, 0, sizeof(hash_table));
1530 netdev_for_each_mc_addr(ha, hp->dev) {
1531 crc = ether_crc_le(6, ha->addr);
1532 crc >>= 26;
1533 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1534 }
1535 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
1536 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
1537 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
1538 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
1539 } else {
1540 hme_write32(hp, bregs + BMAC_HTABLE3, 0);
1541 hme_write32(hp, bregs + BMAC_HTABLE2, 0);
1542 hme_write32(hp, bregs + BMAC_HTABLE1, 0);
1543 hme_write32(hp, bregs + BMAC_HTABLE0, 0);
1544 }
1545
1546 /* Set the RX and TX ring ptrs. */
1547 HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
1548 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
1549 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
1550 hme_write32(hp, erxregs + ERX_RING,
1551 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
1552 hme_write32(hp, etxregs + ETX_RING,
1553 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
1554
1555 /* Parity issues in the ERX unit of some HME revisions can cause some
1556 * registers to not be written unless their parity is even. Detect such
1557 * lost writes and simply rewrite with a low bit set (which will be ignored
1558 * since the rxring needs to be 2K aligned).
1559 */
1560 if (hme_read32(hp, erxregs + ERX_RING) !=
1561 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
1562 hme_write32(hp, erxregs + ERX_RING,
1563 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
1564 | 0x4);
1565
1566 /* Set the supported burst sizes. */
1567 HMD(("happy_meal_init: old[%08x] bursts<",
1568 hme_read32(hp, gregs + GREG_CFG)));
1569
1570 #ifndef CONFIG_SPARC
1571 /* It is always PCI and can handle 64byte bursts. */
1572 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
1573 #else
1574 if ((hp->happy_bursts & DMA_BURST64) &&
1575 ((hp->happy_flags & HFLAG_PCI) != 0
1576 #ifdef CONFIG_SBUS
1577 || sbus_can_burst64()
1578 #endif
1579 || 0)) {
1580 u32 gcfg = GREG_CFG_BURST64;
1581
1582 /* I have no idea if I should set the extended
1583 * transfer mode bit for Cheerio, so for now I
1584 * do not. -DaveM
1585 */
1586 #ifdef CONFIG_SBUS
1587 if ((hp->happy_flags & HFLAG_PCI) == 0) {
1588 struct platform_device *op = hp->happy_dev;
1589 if (sbus_can_dma_64bit()) {
1590 sbus_set_sbus64(&op->dev,
1591 hp->happy_bursts);
1592 gcfg |= GREG_CFG_64BIT;
1593 }
1594 }
1595 #endif
1596
1597 HMD(("64>"));
1598 hme_write32(hp, gregs + GREG_CFG, gcfg);
1599 } else if (hp->happy_bursts & DMA_BURST32) {
1600 HMD(("32>"));
1601 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
1602 } else if (hp->happy_bursts & DMA_BURST16) {
1603 HMD(("16>"));
1604 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
1605 } else {
1606 HMD(("XXX>"));
1607 hme_write32(hp, gregs + GREG_CFG, 0);
1608 }
1609 #endif /* CONFIG_SPARC */
1610
1611 /* Turn off interrupts we do not want to hear. */
1612 HMD((", enable global interrupts, "));
1613 hme_write32(hp, gregs + GREG_IMASK,
1614 (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
1615 GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
1616
1617 /* Set the transmit ring buffer size. */
1618 HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
1619 hme_read32(hp, etxregs + ETX_RSIZE)));
1620 hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
1621
1622 /* Enable transmitter DVMA. */
1623 HMD(("tx dma enable old[%08x], ",
1624 hme_read32(hp, etxregs + ETX_CFG)));
1625 hme_write32(hp, etxregs + ETX_CFG,
1626 hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
1627
1628 /* This chip really rots, for the receiver sometimes when you
1629 * write to its control registers not all the bits get there
1630 * properly. I cannot think of a sane way to provide complete
1631 * coverage for this hardware bug yet.
1632 */
1633 HMD(("erx regs bug old[%08x]\n",
1634 hme_read32(hp, erxregs + ERX_CFG)));
1635 hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1636 regtmp = hme_read32(hp, erxregs + ERX_CFG);
1637 hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1638 if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
1639 printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
1640 printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
1641 ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
1642 /* XXX Should return failure here... */
1643 }
1644
1645 /* Enable Big Mac hash table filter. */
1646 HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
1647 hme_read32(hp, bregs + BMAC_RXCFG)));
1648 rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
1649 if (hp->dev->flags & IFF_PROMISC)
1650 rxcfg |= BIGMAC_RXCFG_PMISC;
1651 hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
1652
1653 /* Let the bits settle in the chip. */
1654 udelay(10);
1655
1656 /* Ok, configure the Big Mac transmitter. */
1657 HMD(("BIGMAC init, "));
1658 regtmp = 0;
1659 if (hp->happy_flags & HFLAG_FULL)
1660 regtmp |= BIGMAC_TXCFG_FULLDPLX;
1661
1662 /* Don't turn on the "don't give up" bit for now. It could cause hme
1663 * to deadlock with the PHY if a Jabber occurs.
1664 */
1665 hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
1666
1667 /* Give up after 16 TX attempts. */
1668 hme_write32(hp, bregs + BMAC_ALIMIT, 16);
1669
1670 /* Enable the output drivers no matter what. */
1671 regtmp = BIGMAC_XCFG_ODENABLE;
1672
1673 /* If card can do lance mode, enable it. */
1674 if (hp->happy_flags & HFLAG_LANCE)
1675 regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
1676
1677 /* Disable the MII buffers if using external transceiver. */
1678 if (hp->tcvr_type == external)
1679 regtmp |= BIGMAC_XCFG_MIIDISAB;
1680
1681 HMD(("XIF config old[%08x], ",
1682 hme_read32(hp, bregs + BMAC_XIFCFG)));
1683 hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
1684
1685 /* Start things up. */
1686 HMD(("tx old[%08x] and rx [%08x] ON!\n",
1687 hme_read32(hp, bregs + BMAC_TXCFG),
1688 hme_read32(hp, bregs + BMAC_RXCFG)));
1689
1690 /* Set larger TX/RX size to allow for 802.1q */
1691 hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
1692 hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
1693
1694 hme_write32(hp, bregs + BMAC_TXCFG,
1695 hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
1696 hme_write32(hp, bregs + BMAC_RXCFG,
1697 hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
1698
1699 /* Get the autonegotiation started, and the watch timer ticking. */
1700 happy_meal_begin_auto_negotiation(hp, tregs, NULL);
1701
1702 /* Success. */
1703 return 0;
1704 }
1705
1706 /* hp->happy_lock must be held */
1707 static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
1708 {
1709 void __iomem *tregs = hp->tcvregs;
1710 void __iomem *bregs = hp->bigmacregs;
1711 void __iomem *gregs = hp->gregs;
1712
1713 happy_meal_stop(hp, gregs);
1714 hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1715 if (hp->happy_flags & HFLAG_FENABLE)
1716 hme_write32(hp, tregs + TCVR_CFG,
1717 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1718 else
1719 hme_write32(hp, tregs + TCVR_CFG,
1720 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1721 happy_meal_transceiver_check(hp, tregs);
1722 switch(hp->tcvr_type) {
1723 case none:
1724 return;
1725 case internal:
1726 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1727 break;
1728 case external:
1729 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1730 break;
1731 }
1732 if (happy_meal_tcvr_reset(hp, tregs))
1733 return;
1734
1735 /* Latch PHY registers as of now. */
1736 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1737 hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1738
1739 /* Advertise everything we can support. */
1740 if (hp->sw_bmsr & BMSR_10HALF)
1741 hp->sw_advertise |= (ADVERTISE_10HALF);
1742 else
1743 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1744
1745 if (hp->sw_bmsr & BMSR_10FULL)
1746 hp->sw_advertise |= (ADVERTISE_10FULL);
1747 else
1748 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1749 if (hp->sw_bmsr & BMSR_100HALF)
1750 hp->sw_advertise |= (ADVERTISE_100HALF);
1751 else
1752 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1753 if (hp->sw_bmsr & BMSR_100FULL)
1754 hp->sw_advertise |= (ADVERTISE_100FULL);
1755 else
1756 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1757
1758 /* Update the PHY advertisement register. */
1759 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1760 }
1761
1762 /* Once status is latched (by happy_meal_interrupt) it is cleared by
1763 * the hardware, so we cannot re-read it and get a correct value.
1764 *
1765 * hp->happy_lock must be held
1766 */
1767 static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
1768 {
1769 int reset = 0;
1770
1771 /* Only print messages for non-counter related interrupts. */
1772 if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
1773 GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
1774 GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
1775 GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
1776 GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
1777 GREG_STAT_SLVPERR))
1778 printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
1779 hp->dev->name, status);
1780
1781 if (status & GREG_STAT_RFIFOVF) {
1782 /* Receive FIFO overflow is harmless and the hardware will take
1783 care of it, just some packets are lost. Who cares. */
1784 printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
1785 }
1786
1787 if (status & GREG_STAT_STSTERR) {
1788 /* BigMAC SQE link test failed. */
1789 printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
1790 reset = 1;
1791 }
1792
1793 if (status & GREG_STAT_TFIFO_UND) {
1794 /* Transmit FIFO underrun, again DMA error likely. */
1795 printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
1796 hp->dev->name);
1797 reset = 1;
1798 }
1799
1800 if (status & GREG_STAT_MAXPKTERR) {
1801 /* Driver error, tried to transmit something larger
1802 * than ethernet max mtu.
1803 */
1804 printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
1805 reset = 1;
1806 }
1807
1808 if (status & GREG_STAT_NORXD) {
1809 /* This is harmless, it just means the system is
1810 * quite loaded and the incoming packet rate was
1811 * faster than the interrupt handler could keep up
1812 * with.
1813 */
1814 printk(KERN_INFO "%s: Happy Meal out of receive "
1815 "descriptors, packet dropped.\n",
1816 hp->dev->name);
1817 }
1818
1819 if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
1820 /* All sorts of DMA receive errors. */
1821 printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
1822 if (status & GREG_STAT_RXERR)
1823 printk("GenericError ");
1824 if (status & GREG_STAT_RXPERR)
1825 printk("ParityError ");
1826 if (status & GREG_STAT_RXTERR)
1827 printk("RxTagBotch ");
1828 printk("]\n");
1829 reset = 1;
1830 }
1831
1832 if (status & GREG_STAT_EOPERR) {
1833 /* Driver bug, didn't set EOP bit in tx descriptor given
1834 * to the happy meal.
1835 */
1836 printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
1837 hp->dev->name);
1838 reset = 1;
1839 }
1840
1841 if (status & GREG_STAT_MIFIRQ) {
1842 /* MIF signalled an interrupt, were we polling it? */
1843 printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
1844 }
1845
1846 if (status &
1847 (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
1848 /* All sorts of transmit DMA errors. */
1849 printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
1850 if (status & GREG_STAT_TXEACK)
1851 printk("GenericError ");
1852 if (status & GREG_STAT_TXLERR)
1853 printk("LateError ");
1854 if (status & GREG_STAT_TXPERR)
1855 printk("ParityErro ");
1856 if (status & GREG_STAT_TXTERR)
1857 printk("TagBotch ");
1858 printk("]\n");
1859 reset = 1;
1860 }
1861
1862 if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
1863 /* Bus or parity error when cpu accessed happy meal registers
1864 * or it's internal FIFO's. Should never see this.
1865 */
1866 printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
1867 hp->dev->name,
1868 (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
1869 reset = 1;
1870 }
1871
1872 if (reset) {
1873 printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
1874 happy_meal_init(hp);
1875 return 1;
1876 }
1877 return 0;
1878 }
1879
1880 /* hp->happy_lock must be held */
1881 static void happy_meal_mif_interrupt(struct happy_meal *hp)
1882 {
1883 void __iomem *tregs = hp->tcvregs;
1884
1885 printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
1886 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1887 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
1888
1889 /* Use the fastest transmission protocol possible. */
1890 if (hp->sw_lpa & LPA_100FULL) {
1891 printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
1892 hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
1893 } else if (hp->sw_lpa & LPA_100HALF) {
1894 printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
1895 hp->sw_bmcr |= BMCR_SPEED100;
1896 } else if (hp->sw_lpa & LPA_10FULL) {
1897 printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
1898 hp->sw_bmcr |= BMCR_FULLDPLX;
1899 } else {
1900 printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
1901 }
1902 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1903
1904 /* Finally stop polling and shut up the MIF. */
1905 happy_meal_poll_stop(hp, tregs);
1906 }
1907
1908 #ifdef TXDEBUG
1909 #define TXD(x) printk x
1910 #else
1911 #define TXD(x)
1912 #endif
1913
1914 /* hp->happy_lock must be held */
1915 static void happy_meal_tx(struct happy_meal *hp)
1916 {
1917 struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
1918 struct happy_meal_txd *this;
1919 struct net_device *dev = hp->dev;
1920 int elem;
1921
1922 elem = hp->tx_old;
1923 TXD(("TX<"));
1924 while (elem != hp->tx_new) {
1925 struct sk_buff *skb;
1926 u32 flags, dma_addr, dma_len;
1927 int frag;
1928
1929 TXD(("[%d]", elem));
1930 this = &txbase[elem];
1931 flags = hme_read_desc32(hp, &this->tx_flags);
1932 if (flags & TXFLAG_OWN)
1933 break;
1934 skb = hp->tx_skbs[elem];
1935 if (skb_shinfo(skb)->nr_frags) {
1936 int last;
1937
1938 last = elem + skb_shinfo(skb)->nr_frags;
1939 last &= (TX_RING_SIZE - 1);
1940 flags = hme_read_desc32(hp, &txbase[last].tx_flags);
1941 if (flags & TXFLAG_OWN)
1942 break;
1943 }
1944 hp->tx_skbs[elem] = NULL;
1945 hp->net_stats.tx_bytes += skb->len;
1946
1947 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1948 dma_addr = hme_read_desc32(hp, &this->tx_addr);
1949 dma_len = hme_read_desc32(hp, &this->tx_flags);
1950
1951 dma_len &= TXFLAG_SIZE;
1952 if (!frag)
1953 dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1954 else
1955 dma_unmap_page(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1956
1957 elem = NEXT_TX(elem);
1958 this = &txbase[elem];
1959 }
1960
1961 dev_kfree_skb_irq(skb);
1962 hp->net_stats.tx_packets++;
1963 }
1964 hp->tx_old = elem;
1965 TXD((">"));
1966
1967 if (netif_queue_stopped(dev) &&
1968 TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
1969 netif_wake_queue(dev);
1970 }
1971
1972 #ifdef RXDEBUG
1973 #define RXD(x) printk x
1974 #else
1975 #define RXD(x)
1976 #endif
1977
1978 /* Originally I used to handle the allocation failure by just giving back just
1979 * that one ring buffer to the happy meal. Problem is that usually when that
1980 * condition is triggered, the happy meal expects you to do something reasonable
1981 * with all of the packets it has DMA'd in. So now I just drop the entire
1982 * ring when we cannot get a new skb and give them all back to the happy meal,
1983 * maybe things will be "happier" now.
1984 *
1985 * hp->happy_lock must be held
1986 */
1987 static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
1988 {
1989 struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
1990 struct happy_meal_rxd *this;
1991 int elem = hp->rx_new, drops = 0;
1992 u32 flags;
1993
1994 RXD(("RX<"));
1995 this = &rxbase[elem];
1996 while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
1997 struct sk_buff *skb;
1998 int len = flags >> 16;
1999 u16 csum = flags & RXFLAG_CSUM;
2000 u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
2001
2002 RXD(("[%d ", elem));
2003
2004 /* Check for errors. */
2005 if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
2006 RXD(("ERR(%08x)]", flags));
2007 hp->net_stats.rx_errors++;
2008 if (len < ETH_ZLEN)
2009 hp->net_stats.rx_length_errors++;
2010 if (len & (RXFLAG_OVERFLOW >> 16)) {
2011 hp->net_stats.rx_over_errors++;
2012 hp->net_stats.rx_fifo_errors++;
2013 }
2014
2015 /* Return it to the Happy meal. */
2016 drop_it:
2017 hp->net_stats.rx_dropped++;
2018 hme_write_rxd(hp, this,
2019 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2020 dma_addr);
2021 goto next;
2022 }
2023 skb = hp->rx_skbs[elem];
2024 if (len > RX_COPY_THRESHOLD) {
2025 struct sk_buff *new_skb;
2026
2027 /* Now refill the entry, if we can. */
2028 new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
2029 if (new_skb == NULL) {
2030 drops++;
2031 goto drop_it;
2032 }
2033 dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
2034 hp->rx_skbs[elem] = new_skb;
2035 new_skb->dev = dev;
2036 skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
2037 hme_write_rxd(hp, this,
2038 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2039 dma_map_single(hp->dma_dev, new_skb->data, RX_BUF_ALLOC_SIZE,
2040 DMA_FROM_DEVICE));
2041 skb_reserve(new_skb, RX_OFFSET);
2042
2043 /* Trim the original skb for the netif. */
2044 skb_trim(skb, len);
2045 } else {
2046 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
2047
2048 if (copy_skb == NULL) {
2049 drops++;
2050 goto drop_it;
2051 }
2052
2053 skb_reserve(copy_skb, 2);
2054 skb_put(copy_skb, len);
2055 dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2056 skb_copy_from_linear_data(skb, copy_skb->data, len);
2057 dma_sync_single_for_device(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2058 /* Reuse original ring buffer. */
2059 hme_write_rxd(hp, this,
2060 (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2061 dma_addr);
2062
2063 skb = copy_skb;
2064 }
2065
2066 /* This card is _fucking_ hot... */
2067 skb->csum = csum_unfold(~(__force __sum16)htons(csum));
2068 skb->ip_summed = CHECKSUM_COMPLETE;
2069
2070 RXD(("len=%d csum=%4x]", len, csum));
2071 skb->protocol = eth_type_trans(skb, dev);
2072 netif_rx(skb);
2073
2074 hp->net_stats.rx_packets++;
2075 hp->net_stats.rx_bytes += len;
2076 next:
2077 elem = NEXT_RX(elem);
2078 this = &rxbase[elem];
2079 }
2080 hp->rx_new = elem;
2081 if (drops)
2082 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
2083 RXD((">"));
2084 }
2085
2086 static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
2087 {
2088 struct net_device *dev = dev_id;
2089 struct happy_meal *hp = netdev_priv(dev);
2090 u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
2091
2092 HMD(("happy_meal_interrupt: status=%08x ", happy_status));
2093
2094 spin_lock(&hp->happy_lock);
2095
2096 if (happy_status & GREG_STAT_ERRORS) {
2097 HMD(("ERRORS "));
2098 if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
2099 goto out;
2100 }
2101
2102 if (happy_status & GREG_STAT_MIFIRQ) {
2103 HMD(("MIFIRQ "));
2104 happy_meal_mif_interrupt(hp);
2105 }
2106
2107 if (happy_status & GREG_STAT_TXALL) {
2108 HMD(("TXALL "));
2109 happy_meal_tx(hp);
2110 }
2111
2112 if (happy_status & GREG_STAT_RXTOHOST) {
2113 HMD(("RXTOHOST "));
2114 happy_meal_rx(hp, dev);
2115 }
2116
2117 HMD(("done\n"));
2118 out:
2119 spin_unlock(&hp->happy_lock);
2120
2121 return IRQ_HANDLED;
2122 }
2123
2124 #ifdef CONFIG_SBUS
2125 static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
2126 {
2127 struct quattro *qp = (struct quattro *) cookie;
2128 int i;
2129
2130 for (i = 0; i < 4; i++) {
2131 struct net_device *dev = qp->happy_meals[i];
2132 struct happy_meal *hp = netdev_priv(dev);
2133 u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
2134
2135 HMD(("quattro_interrupt: status=%08x ", happy_status));
2136
2137 if (!(happy_status & (GREG_STAT_ERRORS |
2138 GREG_STAT_MIFIRQ |
2139 GREG_STAT_TXALL |
2140 GREG_STAT_RXTOHOST)))
2141 continue;
2142
2143 spin_lock(&hp->happy_lock);
2144
2145 if (happy_status & GREG_STAT_ERRORS) {
2146 HMD(("ERRORS "));
2147 if (happy_meal_is_not_so_happy(hp, happy_status))
2148 goto next;
2149 }
2150
2151 if (happy_status & GREG_STAT_MIFIRQ) {
2152 HMD(("MIFIRQ "));
2153 happy_meal_mif_interrupt(hp);
2154 }
2155
2156 if (happy_status & GREG_STAT_TXALL) {
2157 HMD(("TXALL "));
2158 happy_meal_tx(hp);
2159 }
2160
2161 if (happy_status & GREG_STAT_RXTOHOST) {
2162 HMD(("RXTOHOST "));
2163 happy_meal_rx(hp, dev);
2164 }
2165
2166 next:
2167 spin_unlock(&hp->happy_lock);
2168 }
2169 HMD(("done\n"));
2170
2171 return IRQ_HANDLED;
2172 }
2173 #endif
2174
2175 static int happy_meal_open(struct net_device *dev)
2176 {
2177 struct happy_meal *hp = netdev_priv(dev);
2178 int res;
2179
2180 HMD(("happy_meal_open: "));
2181
2182 /* On SBUS Quattro QFE cards, all hme interrupts are concentrated
2183 * into a single source which we register handling at probe time.
2184 */
2185 if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
2186 if (request_irq(dev->irq, happy_meal_interrupt,
2187 IRQF_SHARED, dev->name, (void *)dev)) {
2188 HMD(("EAGAIN\n"));
2189 printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
2190 dev->irq);
2191
2192 return -EAGAIN;
2193 }
2194 }
2195
2196 HMD(("to happy_meal_init\n"));
2197
2198 spin_lock_irq(&hp->happy_lock);
2199 res = happy_meal_init(hp);
2200 spin_unlock_irq(&hp->happy_lock);
2201
2202 if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
2203 free_irq(dev->irq, dev);
2204 return res;
2205 }
2206
2207 static int happy_meal_close(struct net_device *dev)
2208 {
2209 struct happy_meal *hp = netdev_priv(dev);
2210
2211 spin_lock_irq(&hp->happy_lock);
2212 happy_meal_stop(hp, hp->gregs);
2213 happy_meal_clean_rings(hp);
2214
2215 /* If auto-negotiation timer is running, kill it. */
2216 del_timer(&hp->happy_timer);
2217
2218 spin_unlock_irq(&hp->happy_lock);
2219
2220 /* On Quattro QFE cards, all hme interrupts are concentrated
2221 * into a single source which we register handling at probe
2222 * time and never unregister.
2223 */
2224 if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
2225 free_irq(dev->irq, dev);
2226
2227 return 0;
2228 }
2229
2230 #ifdef SXDEBUG
2231 #define SXD(x) printk x
2232 #else
2233 #define SXD(x)
2234 #endif
2235
2236 static void happy_meal_tx_timeout(struct net_device *dev)
2237 {
2238 struct happy_meal *hp = netdev_priv(dev);
2239
2240 printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
2241 tx_dump_log();
2242 printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
2243 hme_read32(hp, hp->gregs + GREG_STAT),
2244 hme_read32(hp, hp->etxregs + ETX_CFG),
2245 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
2246
2247 spin_lock_irq(&hp->happy_lock);
2248 happy_meal_init(hp);
2249 spin_unlock_irq(&hp->happy_lock);
2250
2251 netif_wake_queue(dev);
2252 }
2253
2254 static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
2255 struct net_device *dev)
2256 {
2257 struct happy_meal *hp = netdev_priv(dev);
2258 int entry;
2259 u32 tx_flags;
2260
2261 tx_flags = TXFLAG_OWN;
2262 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2263 const u32 csum_start_off = skb_checksum_start_offset(skb);
2264 const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
2265
2266 tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
2267 ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
2268 ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
2269 }
2270
2271 spin_lock_irq(&hp->happy_lock);
2272
2273 if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
2274 netif_stop_queue(dev);
2275 spin_unlock_irq(&hp->happy_lock);
2276 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
2277 dev->name);
2278 return NETDEV_TX_BUSY;
2279 }
2280
2281 entry = hp->tx_new;
2282 SXD(("SX<l[%d]e[%d]>", len, entry));
2283 hp->tx_skbs[entry] = skb;
2284
2285 if (skb_shinfo(skb)->nr_frags == 0) {
2286 u32 mapping, len;
2287
2288 len = skb->len;
2289 mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
2290 tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
2291 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2292 (tx_flags | (len & TXFLAG_SIZE)),
2293 mapping);
2294 entry = NEXT_TX(entry);
2295 } else {
2296 u32 first_len, first_mapping;
2297 int frag, first_entry = entry;
2298
2299 /* We must give this initial chunk to the device last.
2300 * Otherwise we could race with the device.
2301 */
2302 first_len = skb_headlen(skb);
2303 first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
2304 DMA_TO_DEVICE);
2305 entry = NEXT_TX(entry);
2306
2307 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
2308 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
2309 u32 len, mapping, this_txflags;
2310
2311 len = skb_frag_size(this_frag);
2312 mapping = skb_frag_dma_map(hp->dma_dev, this_frag,
2313 0, len, DMA_TO_DEVICE);
2314 this_txflags = tx_flags;
2315 if (frag == skb_shinfo(skb)->nr_frags - 1)
2316 this_txflags |= TXFLAG_EOP;
2317 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2318 (this_txflags | (len & TXFLAG_SIZE)),
2319 mapping);
2320 entry = NEXT_TX(entry);
2321 }
2322 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
2323 (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
2324 first_mapping);
2325 }
2326
2327 hp->tx_new = entry;
2328
2329 if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
2330 netif_stop_queue(dev);
2331
2332 /* Get it going. */
2333 hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
2334
2335 spin_unlock_irq(&hp->happy_lock);
2336
2337 tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
2338 return NETDEV_TX_OK;
2339 }
2340
2341 static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
2342 {
2343 struct happy_meal *hp = netdev_priv(dev);
2344
2345 spin_lock_irq(&hp->happy_lock);
2346 happy_meal_get_counters(hp, hp->bigmacregs);
2347 spin_unlock_irq(&hp->happy_lock);
2348
2349 return &hp->net_stats;
2350 }
2351
2352 static void happy_meal_set_multicast(struct net_device *dev)
2353 {
2354 struct happy_meal *hp = netdev_priv(dev);
2355 void __iomem *bregs = hp->bigmacregs;
2356 struct netdev_hw_addr *ha;
2357 u32 crc;
2358
2359 spin_lock_irq(&hp->happy_lock);
2360
2361 if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
2362 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
2363 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
2364 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
2365 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
2366 } else if (dev->flags & IFF_PROMISC) {
2367 hme_write32(hp, bregs + BMAC_RXCFG,
2368 hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
2369 } else {
2370 u16 hash_table[4];
2371
2372 memset(hash_table, 0, sizeof(hash_table));
2373 netdev_for_each_mc_addr(ha, dev) {
2374 crc = ether_crc_le(6, ha->addr);
2375 crc >>= 26;
2376 hash_table[crc >> 4] |= 1 << (crc & 0xf);
2377 }
2378 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
2379 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
2380 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
2381 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
2382 }
2383
2384 spin_unlock_irq(&hp->happy_lock);
2385 }
2386
2387 /* Ethtool support... */
2388 static int hme_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2389 {
2390 struct happy_meal *hp = netdev_priv(dev);
2391 u32 speed;
2392
2393 cmd->supported =
2394 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2395 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2396 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
2397
2398 /* XXX hardcoded stuff for now */
2399 cmd->port = PORT_TP; /* XXX no MII support */
2400 cmd->transceiver = XCVR_INTERNAL; /* XXX no external xcvr support */
2401 cmd->phy_address = 0; /* XXX fixed PHYAD */
2402
2403 /* Record PHY settings. */
2404 spin_lock_irq(&hp->happy_lock);
2405 hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2406 hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
2407 spin_unlock_irq(&hp->happy_lock);
2408
2409 if (hp->sw_bmcr & BMCR_ANENABLE) {
2410 cmd->autoneg = AUTONEG_ENABLE;
2411 speed = ((hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
2412 SPEED_100 : SPEED_10);
2413 if (speed == SPEED_100)
2414 cmd->duplex =
2415 (hp->sw_lpa & (LPA_100FULL)) ?
2416 DUPLEX_FULL : DUPLEX_HALF;
2417 else
2418 cmd->duplex =
2419 (hp->sw_lpa & (LPA_10FULL)) ?
2420 DUPLEX_FULL : DUPLEX_HALF;
2421 } else {
2422 cmd->autoneg = AUTONEG_DISABLE;
2423 speed = (hp->sw_bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
2424 cmd->duplex =
2425 (hp->sw_bmcr & BMCR_FULLDPLX) ?
2426 DUPLEX_FULL : DUPLEX_HALF;
2427 }
2428 ethtool_cmd_speed_set(cmd, speed);
2429 return 0;
2430 }
2431
2432 static int hme_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2433 {
2434 struct happy_meal *hp = netdev_priv(dev);
2435
2436 /* Verify the settings we care about. */
2437 if (cmd->autoneg != AUTONEG_ENABLE &&
2438 cmd->autoneg != AUTONEG_DISABLE)
2439 return -EINVAL;
2440 if (cmd->autoneg == AUTONEG_DISABLE &&
2441 ((ethtool_cmd_speed(cmd) != SPEED_100 &&
2442 ethtool_cmd_speed(cmd) != SPEED_10) ||
2443 (cmd->duplex != DUPLEX_HALF &&
2444 cmd->duplex != DUPLEX_FULL)))
2445 return -EINVAL;
2446
2447 /* Ok, do it to it. */
2448 spin_lock_irq(&hp->happy_lock);
2449 del_timer(&hp->happy_timer);
2450 happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
2451 spin_unlock_irq(&hp->happy_lock);
2452
2453 return 0;
2454 }
2455
2456 static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2457 {
2458 struct happy_meal *hp = netdev_priv(dev);
2459
2460 strlcpy(info->driver, "sunhme", sizeof(info->driver));
2461 strlcpy(info->version, "2.02", sizeof(info->version));
2462 if (hp->happy_flags & HFLAG_PCI) {
2463 struct pci_dev *pdev = hp->happy_dev;
2464 strlcpy(info->bus_info, pci_name(pdev), sizeof(info->bus_info));
2465 }
2466 #ifdef CONFIG_SBUS
2467 else {
2468 const struct linux_prom_registers *regs;
2469 struct platform_device *op = hp->happy_dev;
2470 regs = of_get_property(op->dev.of_node, "regs", NULL);
2471 if (regs)
2472 snprintf(info->bus_info, sizeof(info->bus_info),
2473 "SBUS:%d",
2474 regs->which_io);
2475 }
2476 #endif
2477 }
2478
2479 static u32 hme_get_link(struct net_device *dev)
2480 {
2481 struct happy_meal *hp = netdev_priv(dev);
2482
2483 spin_lock_irq(&hp->happy_lock);
2484 hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2485 spin_unlock_irq(&hp->happy_lock);
2486
2487 return hp->sw_bmsr & BMSR_LSTATUS;
2488 }
2489
2490 static const struct ethtool_ops hme_ethtool_ops = {
2491 .get_settings = hme_get_settings,
2492 .set_settings = hme_set_settings,
2493 .get_drvinfo = hme_get_drvinfo,
2494 .get_link = hme_get_link,
2495 };
2496
2497 static int hme_version_printed;
2498
2499 #ifdef CONFIG_SBUS
2500 /* Given a happy meal sbus device, find it's quattro parent.
2501 * If none exist, allocate and return a new one.
2502 *
2503 * Return NULL on failure.
2504 */
2505 static struct quattro * __devinit quattro_sbus_find(struct platform_device *child)
2506 {
2507 struct device *parent = child->dev.parent;
2508 struct platform_device *op;
2509 struct quattro *qp;
2510
2511 op = to_platform_device(parent);
2512 qp = dev_get_drvdata(&op->dev);
2513 if (qp)
2514 return qp;
2515
2516 qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2517 if (qp != NULL) {
2518 int i;
2519
2520 for (i = 0; i < 4; i++)
2521 qp->happy_meals[i] = NULL;
2522
2523 qp->quattro_dev = child;
2524 qp->next = qfe_sbus_list;
2525 qfe_sbus_list = qp;
2526
2527 dev_set_drvdata(&op->dev, qp);
2528 }
2529 return qp;
2530 }
2531
2532 /* After all quattro cards have been probed, we call these functions
2533 * to register the IRQ handlers for the cards that have been
2534 * successfully probed and skip the cards that failed to initialize
2535 */
2536 static int __init quattro_sbus_register_irqs(void)
2537 {
2538 struct quattro *qp;
2539
2540 for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2541 struct platform_device *op = qp->quattro_dev;
2542 int err, qfe_slot, skip = 0;
2543
2544 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2545 if (!qp->happy_meals[qfe_slot])
2546 skip = 1;
2547 }
2548 if (skip)
2549 continue;
2550
2551 err = request_irq(op->archdata.irqs[0],
2552 quattro_sbus_interrupt,
2553 IRQF_SHARED, "Quattro",
2554 qp);
2555 if (err != 0) {
2556 printk(KERN_ERR "Quattro HME: IRQ registration "
2557 "error %d.\n", err);
2558 return err;
2559 }
2560 }
2561
2562 return 0;
2563 }
2564
2565 static void quattro_sbus_free_irqs(void)
2566 {
2567 struct quattro *qp;
2568
2569 for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2570 struct platform_device *op = qp->quattro_dev;
2571 int qfe_slot, skip = 0;
2572
2573 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2574 if (!qp->happy_meals[qfe_slot])
2575 skip = 1;
2576 }
2577 if (skip)
2578 continue;
2579
2580 free_irq(op->archdata.irqs[0], qp);
2581 }
2582 }
2583 #endif /* CONFIG_SBUS */
2584
2585 #ifdef CONFIG_PCI
2586 static struct quattro * __devinit quattro_pci_find(struct pci_dev *pdev)
2587 {
2588 struct pci_dev *bdev = pdev->bus->self;
2589 struct quattro *qp;
2590
2591 if (!bdev) return NULL;
2592 for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
2593 struct pci_dev *qpdev = qp->quattro_dev;
2594
2595 if (qpdev == bdev)
2596 return qp;
2597 }
2598 qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2599 if (qp != NULL) {
2600 int i;
2601
2602 for (i = 0; i < 4; i++)
2603 qp->happy_meals[i] = NULL;
2604
2605 qp->quattro_dev = bdev;
2606 qp->next = qfe_pci_list;
2607 qfe_pci_list = qp;
2608
2609 /* No range tricks necessary on PCI. */
2610 qp->nranges = 0;
2611 }
2612 return qp;
2613 }
2614 #endif /* CONFIG_PCI */
2615
2616 static const struct net_device_ops hme_netdev_ops = {
2617 .ndo_open = happy_meal_open,
2618 .ndo_stop = happy_meal_close,
2619 .ndo_start_xmit = happy_meal_start_xmit,
2620 .ndo_tx_timeout = happy_meal_tx_timeout,
2621 .ndo_get_stats = happy_meal_get_stats,
2622 .ndo_set_rx_mode = happy_meal_set_multicast,
2623 .ndo_change_mtu = eth_change_mtu,
2624 .ndo_set_mac_address = eth_mac_addr,
2625 .ndo_validate_addr = eth_validate_addr,
2626 };
2627
2628 #ifdef CONFIG_SBUS
2629 static int __devinit happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
2630 {
2631 struct device_node *dp = op->dev.of_node, *sbus_dp;
2632 struct quattro *qp = NULL;
2633 struct happy_meal *hp;
2634 struct net_device *dev;
2635 int i, qfe_slot = -1;
2636 int err = -ENODEV;
2637
2638 sbus_dp = op->dev.parent->of_node;
2639
2640 /* We can match PCI devices too, do not accept those here. */
2641 if (strcmp(sbus_dp->name, "sbus") && strcmp(sbus_dp->name, "sbi"))
2642 return err;
2643
2644 if (is_qfe) {
2645 qp = quattro_sbus_find(op);
2646 if (qp == NULL)
2647 goto err_out;
2648 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2649 if (qp->happy_meals[qfe_slot] == NULL)
2650 break;
2651 if (qfe_slot == 4)
2652 goto err_out;
2653 }
2654
2655 err = -ENOMEM;
2656 dev = alloc_etherdev(sizeof(struct happy_meal));
2657 if (!dev)
2658 goto err_out;
2659 SET_NETDEV_DEV(dev, &op->dev);
2660
2661 if (hme_version_printed++ == 0)
2662 printk(KERN_INFO "%s", version);
2663
2664 /* If user did not specify a MAC address specifically, use
2665 * the Quattro local-mac-address property...
2666 */
2667 for (i = 0; i < 6; i++) {
2668 if (macaddr[i] != 0)
2669 break;
2670 }
2671 if (i < 6) { /* a mac address was given */
2672 for (i = 0; i < 6; i++)
2673 dev->dev_addr[i] = macaddr[i];
2674 macaddr[5]++;
2675 } else {
2676 const unsigned char *addr;
2677 int len;
2678
2679 addr = of_get_property(dp, "local-mac-address", &len);
2680
2681 if (qfe_slot != -1 && addr && len == 6)
2682 memcpy(dev->dev_addr, addr, 6);
2683 else
2684 memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
2685 }
2686
2687 hp = netdev_priv(dev);
2688
2689 hp->happy_dev = op;
2690 hp->dma_dev = &op->dev;
2691
2692 spin_lock_init(&hp->happy_lock);
2693
2694 err = -ENODEV;
2695 if (qp != NULL) {
2696 hp->qfe_parent = qp;
2697 hp->qfe_ent = qfe_slot;
2698 qp->happy_meals[qfe_slot] = dev;
2699 }
2700
2701 hp->gregs = of_ioremap(&op->resource[0], 0,
2702 GREG_REG_SIZE, "HME Global Regs");
2703 if (!hp->gregs) {
2704 printk(KERN_ERR "happymeal: Cannot map global registers.\n");
2705 goto err_out_free_netdev;
2706 }
2707
2708 hp->etxregs = of_ioremap(&op->resource[1], 0,
2709 ETX_REG_SIZE, "HME TX Regs");
2710 if (!hp->etxregs) {
2711 printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
2712 goto err_out_iounmap;
2713 }
2714
2715 hp->erxregs = of_ioremap(&op->resource[2], 0,
2716 ERX_REG_SIZE, "HME RX Regs");
2717 if (!hp->erxregs) {
2718 printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
2719 goto err_out_iounmap;
2720 }
2721
2722 hp->bigmacregs = of_ioremap(&op->resource[3], 0,
2723 BMAC_REG_SIZE, "HME BIGMAC Regs");
2724 if (!hp->bigmacregs) {
2725 printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
2726 goto err_out_iounmap;
2727 }
2728
2729 hp->tcvregs = of_ioremap(&op->resource[4], 0,
2730 TCVR_REG_SIZE, "HME Tranceiver Regs");
2731 if (!hp->tcvregs) {
2732 printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
2733 goto err_out_iounmap;
2734 }
2735
2736 hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
2737 if (hp->hm_revision == 0xff)
2738 hp->hm_revision = 0xa0;
2739
2740 /* Now enable the feature flags we can. */
2741 if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
2742 hp->happy_flags = HFLAG_20_21;
2743 else if (hp->hm_revision != 0xa0)
2744 hp->happy_flags = HFLAG_NOT_A0;
2745
2746 if (qp != NULL)
2747 hp->happy_flags |= HFLAG_QUATTRO;
2748
2749 /* Get the supported DVMA burst sizes from our Happy SBUS. */
2750 hp->happy_bursts = of_getintprop_default(sbus_dp,
2751 "burst-sizes", 0x00);
2752
2753 hp->happy_block = dma_alloc_coherent(hp->dma_dev,
2754 PAGE_SIZE,
2755 &hp->hblock_dvma,
2756 GFP_ATOMIC);
2757 err = -ENOMEM;
2758 if (!hp->happy_block) {
2759 printk(KERN_ERR "happymeal: Cannot allocate descriptors.\n");
2760 goto err_out_iounmap;
2761 }
2762
2763 /* Force check of the link first time we are brought up. */
2764 hp->linkcheck = 0;
2765
2766 /* Force timer state to 'asleep' with count of zero. */
2767 hp->timer_state = asleep;
2768 hp->timer_ticks = 0;
2769
2770 init_timer(&hp->happy_timer);
2771
2772 hp->dev = dev;
2773 dev->netdev_ops = &hme_netdev_ops;
2774 dev->watchdog_timeo = 5*HZ;
2775 dev->ethtool_ops = &hme_ethtool_ops;
2776
2777 /* Happy Meal can do it all... */
2778 dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
2779 dev->features |= dev->hw_features | NETIF_F_RXCSUM;
2780
2781 dev->irq = op->archdata.irqs[0];
2782
2783 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
2784 /* Hook up SBUS register/descriptor accessors. */
2785 hp->read_desc32 = sbus_hme_read_desc32;
2786 hp->write_txd = sbus_hme_write_txd;
2787 hp->write_rxd = sbus_hme_write_rxd;
2788 hp->read32 = sbus_hme_read32;
2789 hp->write32 = sbus_hme_write32;
2790 #endif
2791
2792 /* Grrr, Happy Meal comes up by default not advertising
2793 * full duplex 100baseT capabilities, fix this.
2794 */
2795 spin_lock_irq(&hp->happy_lock);
2796 happy_meal_set_initial_advertisement(hp);
2797 spin_unlock_irq(&hp->happy_lock);
2798
2799 err = register_netdev(hp->dev);
2800 if (err) {
2801 printk(KERN_ERR "happymeal: Cannot register net device, "
2802 "aborting.\n");
2803 goto err_out_free_coherent;
2804 }
2805
2806 dev_set_drvdata(&op->dev, hp);
2807
2808 if (qfe_slot != -1)
2809 printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
2810 dev->name, qfe_slot);
2811 else
2812 printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
2813 dev->name);
2814
2815 printk("%pM\n", dev->dev_addr);
2816
2817 return 0;
2818
2819 err_out_free_coherent:
2820 dma_free_coherent(hp->dma_dev,
2821 PAGE_SIZE,
2822 hp->happy_block,
2823 hp->hblock_dvma);
2824
2825 err_out_iounmap:
2826 if (hp->gregs)
2827 of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
2828 if (hp->etxregs)
2829 of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
2830 if (hp->erxregs)
2831 of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
2832 if (hp->bigmacregs)
2833 of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
2834 if (hp->tcvregs)
2835 of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
2836
2837 if (qp)
2838 qp->happy_meals[qfe_slot] = NULL;
2839
2840 err_out_free_netdev:
2841 free_netdev(dev);
2842
2843 err_out:
2844 return err;
2845 }
2846 #endif
2847
2848 #ifdef CONFIG_PCI
2849 #ifndef CONFIG_SPARC
2850 static int is_quattro_p(struct pci_dev *pdev)
2851 {
2852 struct pci_dev *busdev = pdev->bus->self;
2853 struct pci_dev *this_pdev;
2854 int n_hmes;
2855
2856 if (busdev == NULL ||
2857 busdev->vendor != PCI_VENDOR_ID_DEC ||
2858 busdev->device != PCI_DEVICE_ID_DEC_21153)
2859 return 0;
2860
2861 n_hmes = 0;
2862 list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
2863 if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
2864 this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
2865 n_hmes++;
2866 }
2867
2868 if (n_hmes != 4)
2869 return 0;
2870
2871 return 1;
2872 }
2873
2874 /* Fetch MAC address from vital product data of PCI ROM. */
2875 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
2876 {
2877 int this_offset;
2878
2879 for (this_offset = 0x20; this_offset < len; this_offset++) {
2880 void __iomem *p = rom_base + this_offset;
2881
2882 if (readb(p + 0) != 0x90 ||
2883 readb(p + 1) != 0x00 ||
2884 readb(p + 2) != 0x09 ||
2885 readb(p + 3) != 0x4e ||
2886 readb(p + 4) != 0x41 ||
2887 readb(p + 5) != 0x06)
2888 continue;
2889
2890 this_offset += 6;
2891 p += 6;
2892
2893 if (index == 0) {
2894 int i;
2895
2896 for (i = 0; i < 6; i++)
2897 dev_addr[i] = readb(p + i);
2898 return 1;
2899 }
2900 index--;
2901 }
2902 return 0;
2903 }
2904
2905 static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
2906 {
2907 size_t size;
2908 void __iomem *p = pci_map_rom(pdev, &size);
2909
2910 if (p) {
2911 int index = 0;
2912 int found;
2913
2914 if (is_quattro_p(pdev))
2915 index = PCI_SLOT(pdev->devfn);
2916
2917 found = readb(p) == 0x55 &&
2918 readb(p + 1) == 0xaa &&
2919 find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
2920 pci_unmap_rom(pdev, p);
2921 if (found)
2922 return;
2923 }
2924
2925 /* Sun MAC prefix then 3 random bytes. */
2926 dev_addr[0] = 0x08;
2927 dev_addr[1] = 0x00;
2928 dev_addr[2] = 0x20;
2929 get_random_bytes(&dev_addr[3], 3);
2930 }
2931 #endif /* !(CONFIG_SPARC) */
2932
2933 static int __devinit happy_meal_pci_probe(struct pci_dev *pdev,
2934 const struct pci_device_id *ent)
2935 {
2936 struct quattro *qp = NULL;
2937 #ifdef CONFIG_SPARC
2938 struct device_node *dp;
2939 #endif
2940 struct happy_meal *hp;
2941 struct net_device *dev;
2942 void __iomem *hpreg_base;
2943 unsigned long hpreg_res;
2944 int i, qfe_slot = -1;
2945 char prom_name[64];
2946 int err;
2947
2948 /* Now make sure pci_dev cookie is there. */
2949 #ifdef CONFIG_SPARC
2950 dp = pci_device_to_OF_node(pdev);
2951 strcpy(prom_name, dp->name);
2952 #else
2953 if (is_quattro_p(pdev))
2954 strcpy(prom_name, "SUNW,qfe");
2955 else
2956 strcpy(prom_name, "SUNW,hme");
2957 #endif
2958
2959 err = -ENODEV;
2960
2961 if (pci_enable_device(pdev))
2962 goto err_out;
2963 pci_set_master(pdev);
2964
2965 if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
2966 qp = quattro_pci_find(pdev);
2967 if (qp == NULL)
2968 goto err_out;
2969 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2970 if (qp->happy_meals[qfe_slot] == NULL)
2971 break;
2972 if (qfe_slot == 4)
2973 goto err_out;
2974 }
2975
2976 dev = alloc_etherdev(sizeof(struct happy_meal));
2977 err = -ENOMEM;
2978 if (!dev)
2979 goto err_out;
2980 SET_NETDEV_DEV(dev, &pdev->dev);
2981
2982 if (hme_version_printed++ == 0)
2983 printk(KERN_INFO "%s", version);
2984
2985 dev->base_addr = (long) pdev;
2986
2987 hp = netdev_priv(dev);
2988
2989 hp->happy_dev = pdev;
2990 hp->dma_dev = &pdev->dev;
2991
2992 spin_lock_init(&hp->happy_lock);
2993
2994 if (qp != NULL) {
2995 hp->qfe_parent = qp;
2996 hp->qfe_ent = qfe_slot;
2997 qp->happy_meals[qfe_slot] = dev;
2998 }
2999
3000 hpreg_res = pci_resource_start(pdev, 0);
3001 err = -ENODEV;
3002 if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
3003 printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
3004 goto err_out_clear_quattro;
3005 }
3006 if (pci_request_regions(pdev, DRV_NAME)) {
3007 printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
3008 "aborting.\n");
3009 goto err_out_clear_quattro;
3010 }
3011
3012 if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
3013 printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
3014 goto err_out_free_res;
3015 }
3016
3017 for (i = 0; i < 6; i++) {
3018 if (macaddr[i] != 0)
3019 break;
3020 }
3021 if (i < 6) { /* a mac address was given */
3022 for (i = 0; i < 6; i++)
3023 dev->dev_addr[i] = macaddr[i];
3024 macaddr[5]++;
3025 } else {
3026 #ifdef CONFIG_SPARC
3027 const unsigned char *addr;
3028 int len;
3029
3030 if (qfe_slot != -1 &&
3031 (addr = of_get_property(dp, "local-mac-address", &len))
3032 != NULL &&
3033 len == 6) {
3034 memcpy(dev->dev_addr, addr, 6);
3035 } else {
3036 memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
3037 }
3038 #else
3039 get_hme_mac_nonsparc(pdev, &dev->dev_addr[0]);
3040 #endif
3041 }
3042
3043 /* Layout registers. */
3044 hp->gregs = (hpreg_base + 0x0000UL);
3045 hp->etxregs = (hpreg_base + 0x2000UL);
3046 hp->erxregs = (hpreg_base + 0x4000UL);
3047 hp->bigmacregs = (hpreg_base + 0x6000UL);
3048 hp->tcvregs = (hpreg_base + 0x7000UL);
3049
3050 #ifdef CONFIG_SPARC
3051 hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
3052 if (hp->hm_revision == 0xff)
3053 hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
3054 #else
3055 /* works with this on non-sparc hosts */
3056 hp->hm_revision = 0x20;
3057 #endif
3058
3059 /* Now enable the feature flags we can. */
3060 if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
3061 hp->happy_flags = HFLAG_20_21;
3062 else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
3063 hp->happy_flags = HFLAG_NOT_A0;
3064
3065 if (qp != NULL)
3066 hp->happy_flags |= HFLAG_QUATTRO;
3067
3068 /* And of course, indicate this is PCI. */
3069 hp->happy_flags |= HFLAG_PCI;
3070
3071 #ifdef CONFIG_SPARC
3072 /* Assume PCI happy meals can handle all burst sizes. */
3073 hp->happy_bursts = DMA_BURSTBITS;
3074 #endif
3075
3076 hp->happy_block = (struct hmeal_init_block *)
3077 dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &hp->hblock_dvma, GFP_KERNEL);
3078
3079 err = -ENODEV;
3080 if (!hp->happy_block) {
3081 printk(KERN_ERR "happymeal(PCI): Cannot get hme init block.\n");
3082 goto err_out_iounmap;
3083 }
3084
3085 hp->linkcheck = 0;
3086 hp->timer_state = asleep;
3087 hp->timer_ticks = 0;
3088
3089 init_timer(&hp->happy_timer);
3090
3091 hp->dev = dev;
3092 dev->netdev_ops = &hme_netdev_ops;
3093 dev->watchdog_timeo = 5*HZ;
3094 dev->ethtool_ops = &hme_ethtool_ops;
3095 dev->irq = pdev->irq;
3096 dev->dma = 0;
3097
3098 /* Happy Meal can do it all... */
3099 dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
3100 dev->features |= dev->hw_features | NETIF_F_RXCSUM;
3101
3102 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
3103 /* Hook up PCI register/descriptor accessors. */
3104 hp->read_desc32 = pci_hme_read_desc32;
3105 hp->write_txd = pci_hme_write_txd;
3106 hp->write_rxd = pci_hme_write_rxd;
3107 hp->read32 = pci_hme_read32;
3108 hp->write32 = pci_hme_write32;
3109 #endif
3110
3111 /* Grrr, Happy Meal comes up by default not advertising
3112 * full duplex 100baseT capabilities, fix this.
3113 */
3114 spin_lock_irq(&hp->happy_lock);
3115 happy_meal_set_initial_advertisement(hp);
3116 spin_unlock_irq(&hp->happy_lock);
3117
3118 err = register_netdev(hp->dev);
3119 if (err) {
3120 printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
3121 "aborting.\n");
3122 goto err_out_iounmap;
3123 }
3124
3125 dev_set_drvdata(&pdev->dev, hp);
3126
3127 if (!qfe_slot) {
3128 struct pci_dev *qpdev = qp->quattro_dev;
3129
3130 prom_name[0] = 0;
3131 if (!strncmp(dev->name, "eth", 3)) {
3132 int i = simple_strtoul(dev->name + 3, NULL, 10);
3133 sprintf(prom_name, "-%d", i + 3);
3134 }
3135 printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
3136 if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
3137 qpdev->device == PCI_DEVICE_ID_DEC_21153)
3138 printk("DEC 21153 PCI Bridge\n");
3139 else
3140 printk("unknown bridge %04x.%04x\n",
3141 qpdev->vendor, qpdev->device);
3142 }
3143
3144 if (qfe_slot != -1)
3145 printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
3146 dev->name, qfe_slot);
3147 else
3148 printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
3149 dev->name);
3150
3151 printk("%pM\n", dev->dev_addr);
3152
3153 return 0;
3154
3155 err_out_iounmap:
3156 iounmap(hp->gregs);
3157
3158 err_out_free_res:
3159 pci_release_regions(pdev);
3160
3161 err_out_clear_quattro:
3162 if (qp != NULL)
3163 qp->happy_meals[qfe_slot] = NULL;
3164
3165 free_netdev(dev);
3166
3167 err_out:
3168 return err;
3169 }
3170
3171 static void __devexit happy_meal_pci_remove(struct pci_dev *pdev)
3172 {
3173 struct happy_meal *hp = dev_get_drvdata(&pdev->dev);
3174 struct net_device *net_dev = hp->dev;
3175
3176 unregister_netdev(net_dev);
3177
3178 dma_free_coherent(hp->dma_dev, PAGE_SIZE,
3179 hp->happy_block, hp->hblock_dvma);
3180 iounmap(hp->gregs);
3181 pci_release_regions(hp->happy_dev);
3182
3183 free_netdev(net_dev);
3184
3185 dev_set_drvdata(&pdev->dev, NULL);
3186 }
3187
3188 static DEFINE_PCI_DEVICE_TABLE(happymeal_pci_ids) = {
3189 { PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
3190 { } /* Terminating entry */
3191 };
3192
3193 MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
3194
3195 static struct pci_driver hme_pci_driver = {
3196 .name = "hme",
3197 .id_table = happymeal_pci_ids,
3198 .probe = happy_meal_pci_probe,
3199 .remove = __devexit_p(happy_meal_pci_remove),
3200 };
3201
3202 static int __init happy_meal_pci_init(void)
3203 {
3204 return pci_register_driver(&hme_pci_driver);
3205 }
3206
3207 static void happy_meal_pci_exit(void)
3208 {
3209 pci_unregister_driver(&hme_pci_driver);
3210
3211 while (qfe_pci_list) {
3212 struct quattro *qfe = qfe_pci_list;
3213 struct quattro *next = qfe->next;
3214
3215 kfree(qfe);
3216
3217 qfe_pci_list = next;
3218 }
3219 }
3220
3221 #endif
3222
3223 #ifdef CONFIG_SBUS
3224 static const struct of_device_id hme_sbus_match[];
3225 static int __devinit hme_sbus_probe(struct platform_device *op)
3226 {
3227 const struct of_device_id *match;
3228 struct device_node *dp = op->dev.of_node;
3229 const char *model = of_get_property(dp, "model", NULL);
3230 int is_qfe;
3231
3232 match = of_match_device(hme_sbus_match, &op->dev);
3233 if (!match)
3234 return -EINVAL;
3235 is_qfe = (match->data != NULL);
3236
3237 if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
3238 is_qfe = 1;
3239
3240 return happy_meal_sbus_probe_one(op, is_qfe);
3241 }
3242
3243 static int __devexit hme_sbus_remove(struct platform_device *op)
3244 {
3245 struct happy_meal *hp = dev_get_drvdata(&op->dev);
3246 struct net_device *net_dev = hp->dev;
3247
3248 unregister_netdev(net_dev);
3249
3250 /* XXX qfe parent interrupt... */
3251
3252 of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
3253 of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
3254 of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
3255 of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
3256 of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
3257 dma_free_coherent(hp->dma_dev,
3258 PAGE_SIZE,
3259 hp->happy_block,
3260 hp->hblock_dvma);
3261
3262 free_netdev(net_dev);
3263
3264 dev_set_drvdata(&op->dev, NULL);
3265
3266 return 0;
3267 }
3268
3269 static const struct of_device_id hme_sbus_match[] = {
3270 {
3271 .name = "SUNW,hme",
3272 },
3273 {
3274 .name = "SUNW,qfe",
3275 .data = (void *) 1,
3276 },
3277 {
3278 .name = "qfe",
3279 .data = (void *) 1,
3280 },
3281 {},
3282 };
3283
3284 MODULE_DEVICE_TABLE(of, hme_sbus_match);
3285
3286 static struct platform_driver hme_sbus_driver = {
3287 .driver = {
3288 .name = "hme",
3289 .owner = THIS_MODULE,
3290 .of_match_table = hme_sbus_match,
3291 },
3292 .probe = hme_sbus_probe,
3293 .remove = __devexit_p(hme_sbus_remove),
3294 };
3295
3296 static int __init happy_meal_sbus_init(void)
3297 {
3298 int err;
3299
3300 err = platform_driver_register(&hme_sbus_driver);
3301 if (!err)
3302 err = quattro_sbus_register_irqs();
3303
3304 return err;
3305 }
3306
3307 static void happy_meal_sbus_exit(void)
3308 {
3309 platform_driver_unregister(&hme_sbus_driver);
3310 quattro_sbus_free_irqs();
3311
3312 while (qfe_sbus_list) {
3313 struct quattro *qfe = qfe_sbus_list;
3314 struct quattro *next = qfe->next;
3315
3316 kfree(qfe);
3317
3318 qfe_sbus_list = next;
3319 }
3320 }
3321 #endif
3322
3323 static int __init happy_meal_probe(void)
3324 {
3325 int err = 0;
3326
3327 #ifdef CONFIG_SBUS
3328 err = happy_meal_sbus_init();
3329 #endif
3330 #ifdef CONFIG_PCI
3331 if (!err) {
3332 err = happy_meal_pci_init();
3333 #ifdef CONFIG_SBUS
3334 if (err)
3335 happy_meal_sbus_exit();
3336 #endif
3337 }
3338 #endif
3339
3340 return err;
3341 }
3342
3343
3344 static void __exit happy_meal_exit(void)
3345 {
3346 #ifdef CONFIG_SBUS
3347 happy_meal_sbus_exit();
3348 #endif
3349 #ifdef CONFIG_PCI
3350 happy_meal_pci_exit();
3351 #endif
3352 }
3353
3354 module_init(happy_meal_probe);
3355 module_exit(happy_meal_exit);