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1da177e4 LT |
1 | /* |
2 | * smc91x.c | |
3 | * This is a driver for SMSC's 91C9x/91C1xx single-chip Ethernet devices. | |
4 | * | |
5 | * Copyright (C) 1996 by Erik Stahlman | |
6 | * Copyright (C) 2001 Standard Microsystems Corporation | |
7 | * Developed by Simple Network Magic Corporation | |
8 | * Copyright (C) 2003 Monta Vista Software, Inc. | |
9 | * Unified SMC91x driver by Nicolas Pitre | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | * | |
25 | * Arguments: | |
26 | * io = for the base address | |
27 | * irq = for the IRQ | |
28 | * nowait = 0 for normal wait states, 1 eliminates additional wait states | |
29 | * | |
30 | * original author: | |
31 | * Erik Stahlman <erik@vt.edu> | |
32 | * | |
33 | * hardware multicast code: | |
34 | * Peter Cammaert <pc@denkart.be> | |
35 | * | |
36 | * contributors: | |
37 | * Daris A Nevil <dnevil@snmc.com> | |
38 | * Nicolas Pitre <nico@cam.org> | |
39 | * Russell King <rmk@arm.linux.org.uk> | |
40 | * | |
41 | * History: | |
42 | * 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet | |
43 | * 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ" | |
44 | * 03/16/01 Daris A Nevil modified smc9194.c for use with LAN91C111 | |
45 | * 08/22/01 Scott Anderson merge changes from smc9194 to smc91111 | |
46 | * 08/21/01 Pramod B Bhardwaj added support for RevB of LAN91C111 | |
47 | * 12/20/01 Jeff Sutherland initial port to Xscale PXA with DMA support | |
48 | * 04/07/03 Nicolas Pitre unified SMC91x driver, killed irq races, | |
49 | * more bus abstraction, big cleanup, etc. | |
50 | * 29/09/03 Russell King - add driver model support | |
51 | * - ethtool support | |
52 | * - convert to use generic MII interface | |
53 | * - add link up/down notification | |
54 | * - don't try to handle full negotiation in | |
55 | * smc_phy_configure | |
56 | * - clean up (and fix stack overrun) in PHY | |
57 | * MII read/write functions | |
58 | * 22/09/04 Nicolas Pitre big update (see commit log for details) | |
59 | */ | |
60 | static const char version[] = | |
61 | "smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>\n"; | |
62 | ||
63 | /* Debugging level */ | |
64 | #ifndef SMC_DEBUG | |
65 | #define SMC_DEBUG 0 | |
66 | #endif | |
67 | ||
68 | ||
1da177e4 LT |
69 | #include <linux/init.h> |
70 | #include <linux/module.h> | |
71 | #include <linux/kernel.h> | |
72 | #include <linux/sched.h> | |
73 | #include <linux/slab.h> | |
74 | #include <linux/delay.h> | |
75 | #include <linux/interrupt.h> | |
76 | #include <linux/errno.h> | |
77 | #include <linux/ioport.h> | |
78 | #include <linux/crc32.h> | |
d052d1be | 79 | #include <linux/platform_device.h> |
1da177e4 LT |
80 | #include <linux/spinlock.h> |
81 | #include <linux/ethtool.h> | |
82 | #include <linux/mii.h> | |
83 | #include <linux/workqueue.h> | |
84 | ||
85 | #include <linux/netdevice.h> | |
86 | #include <linux/etherdevice.h> | |
87 | #include <linux/skbuff.h> | |
88 | ||
89 | #include <asm/io.h> | |
1da177e4 LT |
90 | |
91 | #include "smc91x.h" | |
92 | ||
93 | #ifdef CONFIG_ISA | |
94 | /* | |
95 | * the LAN91C111 can be at any of the following port addresses. To change, | |
96 | * for a slightly different card, you can add it to the array. Keep in | |
97 | * mind that the array must end in zero. | |
98 | */ | |
99 | static unsigned int smc_portlist[] __initdata = { | |
100 | 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0, | |
101 | 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, 0 | |
102 | }; | |
103 | ||
104 | #ifndef SMC_IOADDR | |
105 | # define SMC_IOADDR -1 | |
106 | #endif | |
107 | static unsigned long io = SMC_IOADDR; | |
108 | module_param(io, ulong, 0400); | |
109 | MODULE_PARM_DESC(io, "I/O base address"); | |
110 | ||
111 | #ifndef SMC_IRQ | |
112 | # define SMC_IRQ -1 | |
113 | #endif | |
114 | static int irq = SMC_IRQ; | |
115 | module_param(irq, int, 0400); | |
116 | MODULE_PARM_DESC(irq, "IRQ number"); | |
117 | ||
118 | #endif /* CONFIG_ISA */ | |
119 | ||
120 | #ifndef SMC_NOWAIT | |
121 | # define SMC_NOWAIT 0 | |
122 | #endif | |
123 | static int nowait = SMC_NOWAIT; | |
124 | module_param(nowait, int, 0400); | |
125 | MODULE_PARM_DESC(nowait, "set to 1 for no wait state"); | |
126 | ||
127 | /* | |
128 | * Transmit timeout, default 5 seconds. | |
129 | */ | |
ea937560 | 130 | static int watchdog = 1000; |
1da177e4 LT |
131 | module_param(watchdog, int, 0400); |
132 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); | |
133 | ||
134 | MODULE_LICENSE("GPL"); | |
72abb461 | 135 | MODULE_ALIAS("platform:smc91x"); |
1da177e4 LT |
136 | |
137 | /* | |
138 | * The internal workings of the driver. If you are changing anything | |
139 | * here with the SMC stuff, you should have the datasheet and know | |
140 | * what you are doing. | |
141 | */ | |
142 | #define CARDNAME "smc91x" | |
143 | ||
144 | /* | |
145 | * Use power-down feature of the chip | |
146 | */ | |
147 | #define POWER_DOWN 1 | |
148 | ||
149 | /* | |
150 | * Wait time for memory to be free. This probably shouldn't be | |
151 | * tuned that much, as waiting for this means nothing else happens | |
152 | * in the system | |
153 | */ | |
154 | #define MEMORY_WAIT_TIME 16 | |
155 | ||
5d0571d9 NP |
156 | /* |
157 | * The maximum number of processing loops allowed for each call to the | |
6aa20a22 | 158 | * IRQ handler. |
5d0571d9 NP |
159 | */ |
160 | #define MAX_IRQ_LOOPS 8 | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * This selects whether TX packets are sent one by one to the SMC91x internal | |
164 | * memory and throttled until transmission completes. This may prevent | |
165 | * RX overruns a litle by keeping much of the memory free for RX packets | |
166 | * but to the expense of reduced TX throughput and increased IRQ overhead. | |
167 | * Note this is not a cure for a too slow data bus or too high IRQ latency. | |
168 | */ | |
169 | #define THROTTLE_TX_PKTS 0 | |
170 | ||
171 | /* | |
172 | * The MII clock high/low times. 2x this number gives the MII clock period | |
173 | * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!) | |
174 | */ | |
175 | #define MII_DELAY 1 | |
176 | ||
1da177e4 LT |
177 | #if SMC_DEBUG > 0 |
178 | #define DBG(n, args...) \ | |
179 | do { \ | |
180 | if (SMC_DEBUG >= (n)) \ | |
181 | printk(args); \ | |
182 | } while (0) | |
183 | ||
184 | #define PRINTK(args...) printk(args) | |
185 | #else | |
186 | #define DBG(n, args...) do { } while(0) | |
187 | #define PRINTK(args...) printk(KERN_DEBUG args) | |
188 | #endif | |
189 | ||
190 | #if SMC_DEBUG > 3 | |
191 | static void PRINT_PKT(u_char *buf, int length) | |
192 | { | |
193 | int i; | |
194 | int remainder; | |
195 | int lines; | |
196 | ||
197 | lines = length / 16; | |
198 | remainder = length % 16; | |
199 | ||
200 | for (i = 0; i < lines ; i ++) { | |
201 | int cur; | |
202 | for (cur = 0; cur < 8; cur++) { | |
203 | u_char a, b; | |
204 | a = *buf++; | |
205 | b = *buf++; | |
206 | printk("%02x%02x ", a, b); | |
207 | } | |
208 | printk("\n"); | |
209 | } | |
210 | for (i = 0; i < remainder/2 ; i++) { | |
211 | u_char a, b; | |
212 | a = *buf++; | |
213 | b = *buf++; | |
214 | printk("%02x%02x ", a, b); | |
215 | } | |
216 | printk("\n"); | |
217 | } | |
218 | #else | |
219 | #define PRINT_PKT(x...) do { } while(0) | |
220 | #endif | |
221 | ||
222 | ||
223 | /* this enables an interrupt in the interrupt mask register */ | |
cfdfa865 | 224 | #define SMC_ENABLE_INT(lp, x) do { \ |
1da177e4 LT |
225 | unsigned char mask; \ |
226 | spin_lock_irq(&lp->lock); \ | |
cfdfa865 | 227 | mask = SMC_GET_INT_MASK(lp); \ |
1da177e4 | 228 | mask |= (x); \ |
cfdfa865 | 229 | SMC_SET_INT_MASK(lp, mask); \ |
1da177e4 LT |
230 | spin_unlock_irq(&lp->lock); \ |
231 | } while (0) | |
232 | ||
233 | /* this disables an interrupt from the interrupt mask register */ | |
cfdfa865 | 234 | #define SMC_DISABLE_INT(lp, x) do { \ |
1da177e4 LT |
235 | unsigned char mask; \ |
236 | spin_lock_irq(&lp->lock); \ | |
cfdfa865 | 237 | mask = SMC_GET_INT_MASK(lp); \ |
1da177e4 | 238 | mask &= ~(x); \ |
cfdfa865 | 239 | SMC_SET_INT_MASK(lp, mask); \ |
1da177e4 LT |
240 | spin_unlock_irq(&lp->lock); \ |
241 | } while (0) | |
242 | ||
243 | /* | |
244 | * Wait while MMU is busy. This is usually in the order of a few nanosecs | |
245 | * if at all, but let's avoid deadlocking the system if the hardware | |
246 | * decides to go south. | |
247 | */ | |
cfdfa865 MD |
248 | #define SMC_WAIT_MMU_BUSY(lp) do { \ |
249 | if (unlikely(SMC_GET_MMU_CMD(lp) & MC_BUSY)) { \ | |
1da177e4 | 250 | unsigned long timeout = jiffies + 2; \ |
cfdfa865 | 251 | while (SMC_GET_MMU_CMD(lp) & MC_BUSY) { \ |
1da177e4 LT |
252 | if (time_after(jiffies, timeout)) { \ |
253 | printk("%s: timeout %s line %d\n", \ | |
254 | dev->name, __FILE__, __LINE__); \ | |
255 | break; \ | |
256 | } \ | |
257 | cpu_relax(); \ | |
258 | } \ | |
259 | } \ | |
260 | } while (0) | |
261 | ||
262 | ||
263 | /* | |
264 | * this does a soft reset on the device | |
265 | */ | |
266 | static void smc_reset(struct net_device *dev) | |
267 | { | |
268 | struct smc_local *lp = netdev_priv(dev); | |
269 | void __iomem *ioaddr = lp->base; | |
270 | unsigned int ctl, cfg; | |
be83668a | 271 | struct sk_buff *pending_skb; |
1da177e4 LT |
272 | |
273 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
274 | ||
be83668a | 275 | /* Disable all interrupts, block TX tasklet */ |
76cb4fe7 | 276 | spin_lock_irq(&lp->lock); |
cfdfa865 MD |
277 | SMC_SELECT_BANK(lp, 2); |
278 | SMC_SET_INT_MASK(lp, 0); | |
be83668a NP |
279 | pending_skb = lp->pending_tx_skb; |
280 | lp->pending_tx_skb = NULL; | |
76cb4fe7 | 281 | spin_unlock_irq(&lp->lock); |
1da177e4 | 282 | |
be83668a NP |
283 | /* free any pending tx skb */ |
284 | if (pending_skb) { | |
285 | dev_kfree_skb(pending_skb); | |
09f75cd7 JG |
286 | dev->stats.tx_errors++; |
287 | dev->stats.tx_aborted_errors++; | |
be83668a NP |
288 | } |
289 | ||
1da177e4 LT |
290 | /* |
291 | * This resets the registers mostly to defaults, but doesn't | |
292 | * affect EEPROM. That seems unnecessary | |
293 | */ | |
cfdfa865 MD |
294 | SMC_SELECT_BANK(lp, 0); |
295 | SMC_SET_RCR(lp, RCR_SOFTRST); | |
1da177e4 LT |
296 | |
297 | /* | |
298 | * Setup the Configuration Register | |
299 | * This is necessary because the CONFIG_REG is not affected | |
300 | * by a soft reset | |
301 | */ | |
cfdfa865 | 302 | SMC_SELECT_BANK(lp, 1); |
1da177e4 LT |
303 | |
304 | cfg = CONFIG_DEFAULT; | |
305 | ||
306 | /* | |
307 | * Setup for fast accesses if requested. If the card/system | |
308 | * can't handle it then there will be no recovery except for | |
309 | * a hard reset or power cycle | |
310 | */ | |
311 | if (nowait) | |
312 | cfg |= CONFIG_NO_WAIT; | |
313 | ||
314 | /* | |
315 | * Release from possible power-down state | |
316 | * Configuration register is not affected by Soft Reset | |
317 | */ | |
318 | cfg |= CONFIG_EPH_POWER_EN; | |
319 | ||
cfdfa865 | 320 | SMC_SET_CONFIG(lp, cfg); |
1da177e4 LT |
321 | |
322 | /* this should pause enough for the chip to be happy */ | |
323 | /* | |
324 | * elaborate? What does the chip _need_? --jgarzik | |
325 | * | |
326 | * This seems to be undocumented, but something the original | |
327 | * driver(s) have always done. Suspect undocumented timing | |
328 | * info/determined empirically. --rmk | |
329 | */ | |
330 | udelay(1); | |
331 | ||
332 | /* Disable transmit and receive functionality */ | |
cfdfa865 MD |
333 | SMC_SELECT_BANK(lp, 0); |
334 | SMC_SET_RCR(lp, RCR_CLEAR); | |
335 | SMC_SET_TCR(lp, TCR_CLEAR); | |
1da177e4 | 336 | |
cfdfa865 MD |
337 | SMC_SELECT_BANK(lp, 1); |
338 | ctl = SMC_GET_CTL(lp) | CTL_LE_ENABLE; | |
1da177e4 LT |
339 | |
340 | /* | |
341 | * Set the control register to automatically release successfully | |
342 | * transmitted packets, to make the best use out of our limited | |
343 | * memory | |
344 | */ | |
345 | if(!THROTTLE_TX_PKTS) | |
346 | ctl |= CTL_AUTO_RELEASE; | |
347 | else | |
348 | ctl &= ~CTL_AUTO_RELEASE; | |
cfdfa865 | 349 | SMC_SET_CTL(lp, ctl); |
1da177e4 LT |
350 | |
351 | /* Reset the MMU */ | |
cfdfa865 MD |
352 | SMC_SELECT_BANK(lp, 2); |
353 | SMC_SET_MMU_CMD(lp, MC_RESET); | |
354 | SMC_WAIT_MMU_BUSY(lp); | |
1da177e4 LT |
355 | } |
356 | ||
357 | /* | |
358 | * Enable Interrupts, Receive, and Transmit | |
359 | */ | |
360 | static void smc_enable(struct net_device *dev) | |
361 | { | |
362 | struct smc_local *lp = netdev_priv(dev); | |
363 | void __iomem *ioaddr = lp->base; | |
364 | int mask; | |
365 | ||
366 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
367 | ||
368 | /* see the header file for options in TCR/RCR DEFAULT */ | |
cfdfa865 MD |
369 | SMC_SELECT_BANK(lp, 0); |
370 | SMC_SET_TCR(lp, lp->tcr_cur_mode); | |
371 | SMC_SET_RCR(lp, lp->rcr_cur_mode); | |
1da177e4 | 372 | |
cfdfa865 MD |
373 | SMC_SELECT_BANK(lp, 1); |
374 | SMC_SET_MAC_ADDR(lp, dev->dev_addr); | |
1da177e4 LT |
375 | |
376 | /* now, enable interrupts */ | |
377 | mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT; | |
378 | if (lp->version >= (CHIP_91100 << 4)) | |
379 | mask |= IM_MDINT; | |
cfdfa865 MD |
380 | SMC_SELECT_BANK(lp, 2); |
381 | SMC_SET_INT_MASK(lp, mask); | |
1da177e4 LT |
382 | |
383 | /* | |
384 | * From this point the register bank must _NOT_ be switched away | |
385 | * to something else than bank 2 without proper locking against | |
386 | * races with any tasklet or interrupt handlers until smc_shutdown() | |
387 | * or smc_reset() is called. | |
388 | */ | |
389 | } | |
390 | ||
391 | /* | |
392 | * this puts the device in an inactive state | |
393 | */ | |
394 | static void smc_shutdown(struct net_device *dev) | |
395 | { | |
396 | struct smc_local *lp = netdev_priv(dev); | |
397 | void __iomem *ioaddr = lp->base; | |
be83668a | 398 | struct sk_buff *pending_skb; |
1da177e4 LT |
399 | |
400 | DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__); | |
401 | ||
402 | /* no more interrupts for me */ | |
76cb4fe7 | 403 | spin_lock_irq(&lp->lock); |
cfdfa865 MD |
404 | SMC_SELECT_BANK(lp, 2); |
405 | SMC_SET_INT_MASK(lp, 0); | |
be83668a NP |
406 | pending_skb = lp->pending_tx_skb; |
407 | lp->pending_tx_skb = NULL; | |
76cb4fe7 | 408 | spin_unlock_irq(&lp->lock); |
be83668a NP |
409 | if (pending_skb) |
410 | dev_kfree_skb(pending_skb); | |
1da177e4 LT |
411 | |
412 | /* and tell the card to stay away from that nasty outside world */ | |
cfdfa865 MD |
413 | SMC_SELECT_BANK(lp, 0); |
414 | SMC_SET_RCR(lp, RCR_CLEAR); | |
415 | SMC_SET_TCR(lp, TCR_CLEAR); | |
1da177e4 LT |
416 | |
417 | #ifdef POWER_DOWN | |
418 | /* finally, shut the chip down */ | |
cfdfa865 MD |
419 | SMC_SELECT_BANK(lp, 1); |
420 | SMC_SET_CONFIG(lp, SMC_GET_CONFIG(lp) & ~CONFIG_EPH_POWER_EN); | |
1da177e4 LT |
421 | #endif |
422 | } | |
423 | ||
424 | /* | |
425 | * This is the procedure to handle the receipt of a packet. | |
426 | */ | |
427 | static inline void smc_rcv(struct net_device *dev) | |
428 | { | |
429 | struct smc_local *lp = netdev_priv(dev); | |
430 | void __iomem *ioaddr = lp->base; | |
431 | unsigned int packet_number, status, packet_len; | |
432 | ||
433 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
434 | ||
cfdfa865 | 435 | packet_number = SMC_GET_RXFIFO(lp); |
1da177e4 LT |
436 | if (unlikely(packet_number & RXFIFO_REMPTY)) { |
437 | PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name); | |
438 | return; | |
439 | } | |
440 | ||
441 | /* read from start of packet */ | |
cfdfa865 | 442 | SMC_SET_PTR(lp, PTR_READ | PTR_RCV | PTR_AUTOINC); |
1da177e4 LT |
443 | |
444 | /* First two words are status and packet length */ | |
cfdfa865 | 445 | SMC_GET_PKT_HDR(lp, status, packet_len); |
1da177e4 LT |
446 | packet_len &= 0x07ff; /* mask off top bits */ |
447 | DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n", | |
448 | dev->name, packet_number, status, | |
449 | packet_len, packet_len); | |
450 | ||
451 | back: | |
452 | if (unlikely(packet_len < 6 || status & RS_ERRORS)) { | |
453 | if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) { | |
454 | /* accept VLAN packets */ | |
455 | status &= ~RS_TOOLONG; | |
456 | goto back; | |
457 | } | |
458 | if (packet_len < 6) { | |
459 | /* bloody hardware */ | |
460 | printk(KERN_ERR "%s: fubar (rxlen %u status %x\n", | |
461 | dev->name, packet_len, status); | |
462 | status |= RS_TOOSHORT; | |
463 | } | |
cfdfa865 MD |
464 | SMC_WAIT_MMU_BUSY(lp); |
465 | SMC_SET_MMU_CMD(lp, MC_RELEASE); | |
09f75cd7 | 466 | dev->stats.rx_errors++; |
1da177e4 | 467 | if (status & RS_ALGNERR) |
09f75cd7 | 468 | dev->stats.rx_frame_errors++; |
1da177e4 | 469 | if (status & (RS_TOOSHORT | RS_TOOLONG)) |
09f75cd7 | 470 | dev->stats.rx_length_errors++; |
1da177e4 | 471 | if (status & RS_BADCRC) |
09f75cd7 | 472 | dev->stats.rx_crc_errors++; |
1da177e4 LT |
473 | } else { |
474 | struct sk_buff *skb; | |
475 | unsigned char *data; | |
476 | unsigned int data_len; | |
477 | ||
478 | /* set multicast stats */ | |
479 | if (status & RS_MULTICAST) | |
09f75cd7 | 480 | dev->stats.multicast++; |
1da177e4 LT |
481 | |
482 | /* | |
483 | * Actual payload is packet_len - 6 (or 5 if odd byte). | |
484 | * We want skb_reserve(2) and the final ctrl word | |
485 | * (2 bytes, possibly containing the payload odd byte). | |
486 | * Furthermore, we add 2 bytes to allow rounding up to | |
487 | * multiple of 4 bytes on 32 bit buses. | |
488 | * Hence packet_len - 6 + 2 + 2 + 2. | |
489 | */ | |
490 | skb = dev_alloc_skb(packet_len); | |
491 | if (unlikely(skb == NULL)) { | |
492 | printk(KERN_NOTICE "%s: Low memory, packet dropped.\n", | |
493 | dev->name); | |
cfdfa865 MD |
494 | SMC_WAIT_MMU_BUSY(lp); |
495 | SMC_SET_MMU_CMD(lp, MC_RELEASE); | |
09f75cd7 | 496 | dev->stats.rx_dropped++; |
1da177e4 LT |
497 | return; |
498 | } | |
499 | ||
500 | /* Align IP header to 32 bits */ | |
501 | skb_reserve(skb, 2); | |
502 | ||
503 | /* BUG: the LAN91C111 rev A never sets this bit. Force it. */ | |
504 | if (lp->version == 0x90) | |
505 | status |= RS_ODDFRAME; | |
506 | ||
507 | /* | |
508 | * If odd length: packet_len - 5, | |
509 | * otherwise packet_len - 6. | |
510 | * With the trailing ctrl byte it's packet_len - 4. | |
511 | */ | |
512 | data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6); | |
513 | data = skb_put(skb, data_len); | |
cfdfa865 | 514 | SMC_PULL_DATA(lp, data, packet_len - 4); |
1da177e4 | 515 | |
cfdfa865 MD |
516 | SMC_WAIT_MMU_BUSY(lp); |
517 | SMC_SET_MMU_CMD(lp, MC_RELEASE); | |
1da177e4 LT |
518 | |
519 | PRINT_PKT(data, packet_len - 4); | |
520 | ||
521 | dev->last_rx = jiffies; | |
1da177e4 LT |
522 | skb->protocol = eth_type_trans(skb, dev); |
523 | netif_rx(skb); | |
09f75cd7 JG |
524 | dev->stats.rx_packets++; |
525 | dev->stats.rx_bytes += data_len; | |
1da177e4 LT |
526 | } |
527 | } | |
528 | ||
529 | #ifdef CONFIG_SMP | |
530 | /* | |
531 | * On SMP we have the following problem: | |
532 | * | |
533 | * A = smc_hardware_send_pkt() | |
534 | * B = smc_hard_start_xmit() | |
535 | * C = smc_interrupt() | |
536 | * | |
537 | * A and B can never be executed simultaneously. However, at least on UP, | |
538 | * it is possible (and even desirable) for C to interrupt execution of | |
539 | * A or B in order to have better RX reliability and avoid overruns. | |
540 | * C, just like A and B, must have exclusive access to the chip and | |
541 | * each of them must lock against any other concurrent access. | |
542 | * Unfortunately this is not possible to have C suspend execution of A or | |
543 | * B taking place on another CPU. On UP this is no an issue since A and B | |
544 | * are run from softirq context and C from hard IRQ context, and there is | |
545 | * no other CPU where concurrent access can happen. | |
546 | * If ever there is a way to force at least B and C to always be executed | |
547 | * on the same CPU then we could use read/write locks to protect against | |
548 | * any other concurrent access and C would always interrupt B. But life | |
549 | * isn't that easy in a SMP world... | |
550 | */ | |
551 | #define smc_special_trylock(lock) \ | |
552 | ({ \ | |
553 | int __ret; \ | |
554 | local_irq_disable(); \ | |
555 | __ret = spin_trylock(lock); \ | |
556 | if (!__ret) \ | |
557 | local_irq_enable(); \ | |
558 | __ret; \ | |
559 | }) | |
560 | #define smc_special_lock(lock) spin_lock_irq(lock) | |
561 | #define smc_special_unlock(lock) spin_unlock_irq(lock) | |
562 | #else | |
563 | #define smc_special_trylock(lock) (1) | |
564 | #define smc_special_lock(lock) do { } while (0) | |
565 | #define smc_special_unlock(lock) do { } while (0) | |
566 | #endif | |
567 | ||
568 | /* | |
569 | * This is called to actually send a packet to the chip. | |
570 | */ | |
571 | static void smc_hardware_send_pkt(unsigned long data) | |
572 | { | |
573 | struct net_device *dev = (struct net_device *)data; | |
574 | struct smc_local *lp = netdev_priv(dev); | |
575 | void __iomem *ioaddr = lp->base; | |
576 | struct sk_buff *skb; | |
577 | unsigned int packet_no, len; | |
578 | unsigned char *buf; | |
579 | ||
580 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
581 | ||
582 | if (!smc_special_trylock(&lp->lock)) { | |
583 | netif_stop_queue(dev); | |
584 | tasklet_schedule(&lp->tx_task); | |
585 | return; | |
586 | } | |
587 | ||
588 | skb = lp->pending_tx_skb; | |
be83668a NP |
589 | if (unlikely(!skb)) { |
590 | smc_special_unlock(&lp->lock); | |
591 | return; | |
592 | } | |
1da177e4 | 593 | lp->pending_tx_skb = NULL; |
be83668a | 594 | |
cfdfa865 | 595 | packet_no = SMC_GET_AR(lp); |
1da177e4 LT |
596 | if (unlikely(packet_no & AR_FAILED)) { |
597 | printk("%s: Memory allocation failed.\n", dev->name); | |
09f75cd7 JG |
598 | dev->stats.tx_errors++; |
599 | dev->stats.tx_fifo_errors++; | |
1da177e4 LT |
600 | smc_special_unlock(&lp->lock); |
601 | goto done; | |
602 | } | |
603 | ||
604 | /* point to the beginning of the packet */ | |
cfdfa865 MD |
605 | SMC_SET_PN(lp, packet_no); |
606 | SMC_SET_PTR(lp, PTR_AUTOINC); | |
1da177e4 LT |
607 | |
608 | buf = skb->data; | |
609 | len = skb->len; | |
610 | DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n", | |
611 | dev->name, packet_no, len, len, buf); | |
612 | PRINT_PKT(buf, len); | |
613 | ||
614 | /* | |
615 | * Send the packet length (+6 for status words, length, and ctl. | |
616 | * The card will pad to 64 bytes with zeroes if packet is too small. | |
617 | */ | |
cfdfa865 | 618 | SMC_PUT_PKT_HDR(lp, 0, len + 6); |
1da177e4 LT |
619 | |
620 | /* send the actual data */ | |
cfdfa865 | 621 | SMC_PUSH_DATA(lp, buf, len & ~1); |
1da177e4 LT |
622 | |
623 | /* Send final ctl word with the last byte if there is one */ | |
cfdfa865 | 624 | SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG(lp)); |
1da177e4 LT |
625 | |
626 | /* | |
ea937560 NP |
627 | * If THROTTLE_TX_PKTS is set, we stop the queue here. This will |
628 | * have the effect of having at most one packet queued for TX | |
629 | * in the chip's memory at all time. | |
630 | * | |
631 | * If THROTTLE_TX_PKTS is not set then the queue is stopped only | |
632 | * when memory allocation (MC_ALLOC) does not succeed right away. | |
1da177e4 | 633 | */ |
ea937560 | 634 | if (THROTTLE_TX_PKTS) |
1da177e4 LT |
635 | netif_stop_queue(dev); |
636 | ||
637 | /* queue the packet for TX */ | |
cfdfa865 | 638 | SMC_SET_MMU_CMD(lp, MC_ENQUEUE); |
1da177e4 LT |
639 | smc_special_unlock(&lp->lock); |
640 | ||
641 | dev->trans_start = jiffies; | |
09f75cd7 JG |
642 | dev->stats.tx_packets++; |
643 | dev->stats.tx_bytes += len; | |
1da177e4 | 644 | |
cfdfa865 | 645 | SMC_ENABLE_INT(lp, IM_TX_INT | IM_TX_EMPTY_INT); |
1da177e4 LT |
646 | |
647 | done: if (!THROTTLE_TX_PKTS) | |
648 | netif_wake_queue(dev); | |
649 | ||
650 | dev_kfree_skb(skb); | |
651 | } | |
652 | ||
653 | /* | |
654 | * Since I am not sure if I will have enough room in the chip's ram | |
655 | * to store the packet, I call this routine which either sends it | |
656 | * now, or set the card to generates an interrupt when ready | |
657 | * for the packet. | |
658 | */ | |
659 | static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
660 | { | |
661 | struct smc_local *lp = netdev_priv(dev); | |
662 | void __iomem *ioaddr = lp->base; | |
663 | unsigned int numPages, poll_count, status; | |
664 | ||
665 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
666 | ||
667 | BUG_ON(lp->pending_tx_skb != NULL); | |
1da177e4 LT |
668 | |
669 | /* | |
670 | * The MMU wants the number of pages to be the number of 256 bytes | |
671 | * 'pages', minus 1 (since a packet can't ever have 0 pages :)) | |
672 | * | |
673 | * The 91C111 ignores the size bits, but earlier models don't. | |
674 | * | |
675 | * Pkt size for allocating is data length +6 (for additional status | |
676 | * words, length and ctl) | |
677 | * | |
678 | * If odd size then last byte is included in ctl word. | |
679 | */ | |
680 | numPages = ((skb->len & ~1) + (6 - 1)) >> 8; | |
681 | if (unlikely(numPages > 7)) { | |
682 | printk("%s: Far too big packet error.\n", dev->name); | |
09f75cd7 JG |
683 | dev->stats.tx_errors++; |
684 | dev->stats.tx_dropped++; | |
1da177e4 LT |
685 | dev_kfree_skb(skb); |
686 | return 0; | |
687 | } | |
688 | ||
689 | smc_special_lock(&lp->lock); | |
690 | ||
691 | /* now, try to allocate the memory */ | |
cfdfa865 | 692 | SMC_SET_MMU_CMD(lp, MC_ALLOC | numPages); |
1da177e4 LT |
693 | |
694 | /* | |
695 | * Poll the chip for a short amount of time in case the | |
696 | * allocation succeeds quickly. | |
697 | */ | |
698 | poll_count = MEMORY_WAIT_TIME; | |
699 | do { | |
cfdfa865 | 700 | status = SMC_GET_INT(lp); |
1da177e4 | 701 | if (status & IM_ALLOC_INT) { |
cfdfa865 | 702 | SMC_ACK_INT(lp, IM_ALLOC_INT); |
1da177e4 LT |
703 | break; |
704 | } | |
705 | } while (--poll_count); | |
706 | ||
707 | smc_special_unlock(&lp->lock); | |
708 | ||
be83668a | 709 | lp->pending_tx_skb = skb; |
1da177e4 LT |
710 | if (!poll_count) { |
711 | /* oh well, wait until the chip finds memory later */ | |
712 | netif_stop_queue(dev); | |
713 | DBG(2, "%s: TX memory allocation deferred.\n", dev->name); | |
cfdfa865 | 714 | SMC_ENABLE_INT(lp, IM_ALLOC_INT); |
1da177e4 LT |
715 | } else { |
716 | /* | |
717 | * Allocation succeeded: push packet to the chip's own memory | |
718 | * immediately. | |
6aa20a22 | 719 | */ |
1da177e4 LT |
720 | smc_hardware_send_pkt((unsigned long)dev); |
721 | } | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | /* | |
727 | * This handles a TX interrupt, which is only called when: | |
728 | * - a TX error occurred, or | |
729 | * - CTL_AUTO_RELEASE is not set and TX of a packet completed. | |
730 | */ | |
731 | static void smc_tx(struct net_device *dev) | |
732 | { | |
733 | struct smc_local *lp = netdev_priv(dev); | |
734 | void __iomem *ioaddr = lp->base; | |
735 | unsigned int saved_packet, packet_no, tx_status, pkt_len; | |
736 | ||
737 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
738 | ||
739 | /* If the TX FIFO is empty then nothing to do */ | |
cfdfa865 | 740 | packet_no = SMC_GET_TXFIFO(lp); |
1da177e4 LT |
741 | if (unlikely(packet_no & TXFIFO_TEMPTY)) { |
742 | PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name); | |
743 | return; | |
744 | } | |
745 | ||
746 | /* select packet to read from */ | |
cfdfa865 MD |
747 | saved_packet = SMC_GET_PN(lp); |
748 | SMC_SET_PN(lp, packet_no); | |
1da177e4 LT |
749 | |
750 | /* read the first word (status word) from this packet */ | |
cfdfa865 MD |
751 | SMC_SET_PTR(lp, PTR_AUTOINC | PTR_READ); |
752 | SMC_GET_PKT_HDR(lp, tx_status, pkt_len); | |
1da177e4 LT |
753 | DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n", |
754 | dev->name, tx_status, packet_no); | |
755 | ||
8de90115 | 756 | if (!(tx_status & ES_TX_SUC)) |
09f75cd7 | 757 | dev->stats.tx_errors++; |
8de90115 NP |
758 | |
759 | if (tx_status & ES_LOSTCARR) | |
09f75cd7 | 760 | dev->stats.tx_carrier_errors++; |
1da177e4 | 761 | |
8de90115 NP |
762 | if (tx_status & (ES_LATCOL | ES_16COL)) { |
763 | PRINTK("%s: %s occurred on last xmit\n", dev->name, | |
764 | (tx_status & ES_LATCOL) ? | |
765 | "late collision" : "too many collisions"); | |
09f75cd7 JG |
766 | dev->stats.tx_window_errors++; |
767 | if (!(dev->stats.tx_window_errors & 63) && net_ratelimit()) { | |
8de90115 NP |
768 | printk(KERN_INFO "%s: unexpectedly large number of " |
769 | "bad collisions. Please check duplex " | |
1da177e4 LT |
770 | "setting.\n", dev->name); |
771 | } | |
772 | } | |
773 | ||
774 | /* kill the packet */ | |
cfdfa865 MD |
775 | SMC_WAIT_MMU_BUSY(lp); |
776 | SMC_SET_MMU_CMD(lp, MC_FREEPKT); | |
1da177e4 LT |
777 | |
778 | /* Don't restore Packet Number Reg until busy bit is cleared */ | |
cfdfa865 MD |
779 | SMC_WAIT_MMU_BUSY(lp); |
780 | SMC_SET_PN(lp, saved_packet); | |
1da177e4 LT |
781 | |
782 | /* re-enable transmit */ | |
cfdfa865 MD |
783 | SMC_SELECT_BANK(lp, 0); |
784 | SMC_SET_TCR(lp, lp->tcr_cur_mode); | |
785 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 LT |
786 | } |
787 | ||
788 | ||
789 | /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ | |
790 | ||
791 | static void smc_mii_out(struct net_device *dev, unsigned int val, int bits) | |
792 | { | |
793 | struct smc_local *lp = netdev_priv(dev); | |
794 | void __iomem *ioaddr = lp->base; | |
795 | unsigned int mii_reg, mask; | |
796 | ||
cfdfa865 | 797 | mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO); |
1da177e4 LT |
798 | mii_reg |= MII_MDOE; |
799 | ||
800 | for (mask = 1 << (bits - 1); mask; mask >>= 1) { | |
801 | if (val & mask) | |
802 | mii_reg |= MII_MDO; | |
803 | else | |
804 | mii_reg &= ~MII_MDO; | |
805 | ||
cfdfa865 | 806 | SMC_SET_MII(lp, mii_reg); |
1da177e4 | 807 | udelay(MII_DELAY); |
cfdfa865 | 808 | SMC_SET_MII(lp, mii_reg | MII_MCLK); |
1da177e4 LT |
809 | udelay(MII_DELAY); |
810 | } | |
811 | } | |
812 | ||
813 | static unsigned int smc_mii_in(struct net_device *dev, int bits) | |
814 | { | |
815 | struct smc_local *lp = netdev_priv(dev); | |
816 | void __iomem *ioaddr = lp->base; | |
817 | unsigned int mii_reg, mask, val; | |
818 | ||
cfdfa865 MD |
819 | mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO); |
820 | SMC_SET_MII(lp, mii_reg); | |
1da177e4 LT |
821 | |
822 | for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) { | |
cfdfa865 | 823 | if (SMC_GET_MII(lp) & MII_MDI) |
1da177e4 LT |
824 | val |= mask; |
825 | ||
cfdfa865 | 826 | SMC_SET_MII(lp, mii_reg); |
1da177e4 | 827 | udelay(MII_DELAY); |
cfdfa865 | 828 | SMC_SET_MII(lp, mii_reg | MII_MCLK); |
1da177e4 LT |
829 | udelay(MII_DELAY); |
830 | } | |
831 | ||
832 | return val; | |
833 | } | |
834 | ||
835 | /* | |
836 | * Reads a register from the MII Management serial interface | |
837 | */ | |
838 | static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg) | |
839 | { | |
840 | struct smc_local *lp = netdev_priv(dev); | |
841 | void __iomem *ioaddr = lp->base; | |
842 | unsigned int phydata; | |
843 | ||
cfdfa865 | 844 | SMC_SELECT_BANK(lp, 3); |
1da177e4 LT |
845 | |
846 | /* Idle - 32 ones */ | |
847 | smc_mii_out(dev, 0xffffffff, 32); | |
848 | ||
849 | /* Start code (01) + read (10) + phyaddr + phyreg */ | |
850 | smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14); | |
851 | ||
852 | /* Turnaround (2bits) + phydata */ | |
853 | phydata = smc_mii_in(dev, 18); | |
854 | ||
855 | /* Return to idle state */ | |
cfdfa865 | 856 | SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO)); |
1da177e4 LT |
857 | |
858 | DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n", | |
859 | __FUNCTION__, phyaddr, phyreg, phydata); | |
860 | ||
cfdfa865 | 861 | SMC_SELECT_BANK(lp, 2); |
1da177e4 LT |
862 | return phydata; |
863 | } | |
864 | ||
865 | /* | |
866 | * Writes a register to the MII Management serial interface | |
867 | */ | |
868 | static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg, | |
869 | int phydata) | |
870 | { | |
871 | struct smc_local *lp = netdev_priv(dev); | |
872 | void __iomem *ioaddr = lp->base; | |
873 | ||
cfdfa865 | 874 | SMC_SELECT_BANK(lp, 3); |
1da177e4 LT |
875 | |
876 | /* Idle - 32 ones */ | |
877 | smc_mii_out(dev, 0xffffffff, 32); | |
878 | ||
879 | /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */ | |
880 | smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32); | |
881 | ||
882 | /* Return to idle state */ | |
cfdfa865 | 883 | SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO)); |
1da177e4 LT |
884 | |
885 | DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n", | |
886 | __FUNCTION__, phyaddr, phyreg, phydata); | |
887 | ||
cfdfa865 | 888 | SMC_SELECT_BANK(lp, 2); |
1da177e4 LT |
889 | } |
890 | ||
891 | /* | |
892 | * Finds and reports the PHY address | |
893 | */ | |
894 | static void smc_phy_detect(struct net_device *dev) | |
895 | { | |
896 | struct smc_local *lp = netdev_priv(dev); | |
897 | int phyaddr; | |
898 | ||
899 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
900 | ||
901 | lp->phy_type = 0; | |
902 | ||
903 | /* | |
904 | * Scan all 32 PHY addresses if necessary, starting at | |
905 | * PHY#1 to PHY#31, and then PHY#0 last. | |
906 | */ | |
907 | for (phyaddr = 1; phyaddr < 33; ++phyaddr) { | |
908 | unsigned int id1, id2; | |
909 | ||
910 | /* Read the PHY identifiers */ | |
911 | id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1); | |
912 | id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2); | |
913 | ||
914 | DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n", | |
915 | dev->name, id1, id2); | |
916 | ||
917 | /* Make sure it is a valid identifier */ | |
918 | if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 && | |
919 | id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) { | |
920 | /* Save the PHY's address */ | |
921 | lp->mii.phy_id = phyaddr & 31; | |
922 | lp->phy_type = id1 << 16 | id2; | |
923 | break; | |
924 | } | |
925 | } | |
926 | } | |
927 | ||
928 | /* | |
929 | * Sets the PHY to a configuration as determined by the user | |
930 | */ | |
931 | static int smc_phy_fixed(struct net_device *dev) | |
932 | { | |
933 | struct smc_local *lp = netdev_priv(dev); | |
934 | void __iomem *ioaddr = lp->base; | |
935 | int phyaddr = lp->mii.phy_id; | |
936 | int bmcr, cfg1; | |
937 | ||
938 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
939 | ||
940 | /* Enter Link Disable state */ | |
941 | cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG); | |
942 | cfg1 |= PHY_CFG1_LNKDIS; | |
943 | smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1); | |
944 | ||
945 | /* | |
946 | * Set our fixed capabilities | |
947 | * Disable auto-negotiation | |
948 | */ | |
949 | bmcr = 0; | |
950 | ||
951 | if (lp->ctl_rfduplx) | |
952 | bmcr |= BMCR_FULLDPLX; | |
953 | ||
954 | if (lp->ctl_rspeed == 100) | |
955 | bmcr |= BMCR_SPEED100; | |
956 | ||
957 | /* Write our capabilities to the phy control register */ | |
958 | smc_phy_write(dev, phyaddr, MII_BMCR, bmcr); | |
959 | ||
960 | /* Re-Configure the Receive/Phy Control register */ | |
cfdfa865 MD |
961 | SMC_SELECT_BANK(lp, 0); |
962 | SMC_SET_RPC(lp, lp->rpc_cur_mode); | |
963 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 LT |
964 | |
965 | return 1; | |
966 | } | |
967 | ||
968 | /* | |
969 | * smc_phy_reset - reset the phy | |
970 | * @dev: net device | |
971 | * @phy: phy address | |
972 | * | |
973 | * Issue a software reset for the specified PHY and | |
974 | * wait up to 100ms for the reset to complete. We should | |
975 | * not access the PHY for 50ms after issuing the reset. | |
976 | * | |
977 | * The time to wait appears to be dependent on the PHY. | |
978 | * | |
979 | * Must be called with lp->lock locked. | |
980 | */ | |
981 | static int smc_phy_reset(struct net_device *dev, int phy) | |
982 | { | |
983 | struct smc_local *lp = netdev_priv(dev); | |
984 | unsigned int bmcr; | |
985 | int timeout; | |
986 | ||
987 | smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET); | |
988 | ||
989 | for (timeout = 2; timeout; timeout--) { | |
990 | spin_unlock_irq(&lp->lock); | |
991 | msleep(50); | |
992 | spin_lock_irq(&lp->lock); | |
993 | ||
994 | bmcr = smc_phy_read(dev, phy, MII_BMCR); | |
995 | if (!(bmcr & BMCR_RESET)) | |
996 | break; | |
997 | } | |
998 | ||
999 | return bmcr & BMCR_RESET; | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * smc_phy_powerdown - powerdown phy | |
1004 | * @dev: net device | |
1005 | * | |
1006 | * Power down the specified PHY | |
1007 | */ | |
1008 | static void smc_phy_powerdown(struct net_device *dev) | |
1009 | { | |
1010 | struct smc_local *lp = netdev_priv(dev); | |
1011 | unsigned int bmcr; | |
1012 | int phy = lp->mii.phy_id; | |
1013 | ||
1014 | if (lp->phy_type == 0) | |
1015 | return; | |
1016 | ||
1017 | /* We need to ensure that no calls to smc_phy_configure are | |
1018 | pending. | |
1019 | ||
1020 | flush_scheduled_work() cannot be called because we are | |
1021 | running with the netlink semaphore held (from | |
1022 | devinet_ioctl()) and the pending work queue contains | |
1023 | linkwatch_event() (scheduled by netif_carrier_off() | |
1024 | above). linkwatch_event() also wants the netlink semaphore. | |
1025 | */ | |
1026 | while(lp->work_pending) | |
be83668a | 1027 | yield(); |
1da177e4 LT |
1028 | |
1029 | bmcr = smc_phy_read(dev, phy, MII_BMCR); | |
1030 | smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN); | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * smc_phy_check_media - check the media status and adjust TCR | |
1035 | * @dev: net device | |
1036 | * @init: set true for initialisation | |
1037 | * | |
1038 | * Select duplex mode depending on negotiation state. This | |
1039 | * also updates our carrier state. | |
1040 | */ | |
1041 | static void smc_phy_check_media(struct net_device *dev, int init) | |
1042 | { | |
1043 | struct smc_local *lp = netdev_priv(dev); | |
1044 | void __iomem *ioaddr = lp->base; | |
1045 | ||
1046 | if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) { | |
1047 | /* duplex state has changed */ | |
1048 | if (lp->mii.full_duplex) { | |
1049 | lp->tcr_cur_mode |= TCR_SWFDUP; | |
1050 | } else { | |
1051 | lp->tcr_cur_mode &= ~TCR_SWFDUP; | |
1052 | } | |
1053 | ||
cfdfa865 MD |
1054 | SMC_SELECT_BANK(lp, 0); |
1055 | SMC_SET_TCR(lp, lp->tcr_cur_mode); | |
1da177e4 LT |
1056 | } |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Configures the specified PHY through the MII management interface | |
1061 | * using Autonegotiation. | |
1062 | * Calls smc_phy_fixed() if the user has requested a certain config. | |
1063 | * If RPC ANEG bit is set, the media selection is dependent purely on | |
1064 | * the selection by the MII (either in the MII BMCR reg or the result | |
1065 | * of autonegotiation.) If the RPC ANEG bit is cleared, the selection | |
1066 | * is controlled by the RPC SPEED and RPC DPLX bits. | |
1067 | */ | |
6d5aefb8 | 1068 | static void smc_phy_configure(struct work_struct *work) |
1da177e4 | 1069 | { |
6d5aefb8 DH |
1070 | struct smc_local *lp = |
1071 | container_of(work, struct smc_local, phy_configure); | |
1072 | struct net_device *dev = lp->dev; | |
1da177e4 LT |
1073 | void __iomem *ioaddr = lp->base; |
1074 | int phyaddr = lp->mii.phy_id; | |
1075 | int my_phy_caps; /* My PHY capabilities */ | |
1076 | int my_ad_caps; /* My Advertised capabilities */ | |
1077 | int status; | |
1078 | ||
1079 | DBG(3, "%s:smc_program_phy()\n", dev->name); | |
1080 | ||
1081 | spin_lock_irq(&lp->lock); | |
1082 | ||
1083 | /* | |
1084 | * We should not be called if phy_type is zero. | |
1085 | */ | |
1086 | if (lp->phy_type == 0) | |
1087 | goto smc_phy_configure_exit; | |
1088 | ||
1089 | if (smc_phy_reset(dev, phyaddr)) { | |
1090 | printk("%s: PHY reset timed out\n", dev->name); | |
1091 | goto smc_phy_configure_exit; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Enable PHY Interrupts (for register 18) | |
1096 | * Interrupts listed here are disabled | |
1097 | */ | |
1098 | smc_phy_write(dev, phyaddr, PHY_MASK_REG, | |
1099 | PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD | | |
1100 | PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB | | |
1101 | PHY_INT_SPDDET | PHY_INT_DPLXDET); | |
1102 | ||
1103 | /* Configure the Receive/Phy Control register */ | |
cfdfa865 MD |
1104 | SMC_SELECT_BANK(lp, 0); |
1105 | SMC_SET_RPC(lp, lp->rpc_cur_mode); | |
1da177e4 LT |
1106 | |
1107 | /* If the user requested no auto neg, then go set his request */ | |
1108 | if (lp->mii.force_media) { | |
1109 | smc_phy_fixed(dev); | |
1110 | goto smc_phy_configure_exit; | |
1111 | } | |
1112 | ||
1113 | /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */ | |
1114 | my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR); | |
1115 | ||
1116 | if (!(my_phy_caps & BMSR_ANEGCAPABLE)) { | |
1117 | printk(KERN_INFO "Auto negotiation NOT supported\n"); | |
1118 | smc_phy_fixed(dev); | |
1119 | goto smc_phy_configure_exit; | |
1120 | } | |
1121 | ||
1122 | my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */ | |
1123 | ||
1124 | if (my_phy_caps & BMSR_100BASE4) | |
1125 | my_ad_caps |= ADVERTISE_100BASE4; | |
1126 | if (my_phy_caps & BMSR_100FULL) | |
1127 | my_ad_caps |= ADVERTISE_100FULL; | |
1128 | if (my_phy_caps & BMSR_100HALF) | |
1129 | my_ad_caps |= ADVERTISE_100HALF; | |
1130 | if (my_phy_caps & BMSR_10FULL) | |
1131 | my_ad_caps |= ADVERTISE_10FULL; | |
1132 | if (my_phy_caps & BMSR_10HALF) | |
1133 | my_ad_caps |= ADVERTISE_10HALF; | |
1134 | ||
1135 | /* Disable capabilities not selected by our user */ | |
1136 | if (lp->ctl_rspeed != 100) | |
1137 | my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF); | |
1138 | ||
1139 | if (!lp->ctl_rfduplx) | |
1140 | my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL); | |
1141 | ||
1142 | /* Update our Auto-Neg Advertisement Register */ | |
1143 | smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps); | |
1144 | lp->mii.advertising = my_ad_caps; | |
1145 | ||
1146 | /* | |
1147 | * Read the register back. Without this, it appears that when | |
1148 | * auto-negotiation is restarted, sometimes it isn't ready and | |
1149 | * the link does not come up. | |
1150 | */ | |
1151 | status = smc_phy_read(dev, phyaddr, MII_ADVERTISE); | |
1152 | ||
1153 | DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps); | |
1154 | DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps); | |
1155 | ||
1156 | /* Restart auto-negotiation process in order to advertise my caps */ | |
1157 | smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART); | |
1158 | ||
1159 | smc_phy_check_media(dev, 1); | |
1160 | ||
1161 | smc_phy_configure_exit: | |
cfdfa865 | 1162 | SMC_SELECT_BANK(lp, 2); |
1da177e4 LT |
1163 | spin_unlock_irq(&lp->lock); |
1164 | lp->work_pending = 0; | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * smc_phy_interrupt | |
1169 | * | |
1170 | * Purpose: Handle interrupts relating to PHY register 18. This is | |
1171 | * called from the "hard" interrupt handler under our private spinlock. | |
1172 | */ | |
1173 | static void smc_phy_interrupt(struct net_device *dev) | |
1174 | { | |
1175 | struct smc_local *lp = netdev_priv(dev); | |
1176 | int phyaddr = lp->mii.phy_id; | |
1177 | int phy18; | |
1178 | ||
1179 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
1180 | ||
1181 | if (lp->phy_type == 0) | |
1182 | return; | |
1183 | ||
1184 | for(;;) { | |
1185 | smc_phy_check_media(dev, 0); | |
1186 | ||
1187 | /* Read PHY Register 18, Status Output */ | |
1188 | phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG); | |
1189 | if ((phy18 & PHY_INT_INT) == 0) | |
1190 | break; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/ | |
1195 | ||
1196 | static void smc_10bt_check_media(struct net_device *dev, int init) | |
1197 | { | |
1198 | struct smc_local *lp = netdev_priv(dev); | |
1199 | void __iomem *ioaddr = lp->base; | |
1200 | unsigned int old_carrier, new_carrier; | |
1201 | ||
1202 | old_carrier = netif_carrier_ok(dev) ? 1 : 0; | |
1203 | ||
cfdfa865 MD |
1204 | SMC_SELECT_BANK(lp, 0); |
1205 | new_carrier = (SMC_GET_EPH_STATUS(lp) & ES_LINK_OK) ? 1 : 0; | |
1206 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 LT |
1207 | |
1208 | if (init || (old_carrier != new_carrier)) { | |
1209 | if (!new_carrier) { | |
1210 | netif_carrier_off(dev); | |
1211 | } else { | |
1212 | netif_carrier_on(dev); | |
1213 | } | |
1214 | if (netif_msg_link(lp)) | |
1215 | printk(KERN_INFO "%s: link %s\n", dev->name, | |
1216 | new_carrier ? "up" : "down"); | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | static void smc_eph_interrupt(struct net_device *dev) | |
1221 | { | |
1222 | struct smc_local *lp = netdev_priv(dev); | |
1223 | void __iomem *ioaddr = lp->base; | |
1224 | unsigned int ctl; | |
1225 | ||
1226 | smc_10bt_check_media(dev, 0); | |
1227 | ||
cfdfa865 MD |
1228 | SMC_SELECT_BANK(lp, 1); |
1229 | ctl = SMC_GET_CTL(lp); | |
1230 | SMC_SET_CTL(lp, ctl & ~CTL_LE_ENABLE); | |
1231 | SMC_SET_CTL(lp, ctl); | |
1232 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 LT |
1233 | } |
1234 | ||
1235 | /* | |
1236 | * This is the main routine of the driver, to handle the device when | |
1237 | * it needs some attention. | |
1238 | */ | |
7d12e780 | 1239 | static irqreturn_t smc_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1240 | { |
1241 | struct net_device *dev = dev_id; | |
1242 | struct smc_local *lp = netdev_priv(dev); | |
1243 | void __iomem *ioaddr = lp->base; | |
1244 | int status, mask, timeout, card_stats; | |
1245 | int saved_pointer; | |
1246 | ||
1247 | DBG(3, "%s: %s\n", dev->name, __FUNCTION__); | |
1248 | ||
1249 | spin_lock(&lp->lock); | |
1250 | ||
1251 | /* A preamble may be used when there is a potential race | |
1252 | * between the interruptible transmit functions and this | |
1253 | * ISR. */ | |
1254 | SMC_INTERRUPT_PREAMBLE; | |
1255 | ||
cfdfa865 MD |
1256 | saved_pointer = SMC_GET_PTR(lp); |
1257 | mask = SMC_GET_INT_MASK(lp); | |
1258 | SMC_SET_INT_MASK(lp, 0); | |
1da177e4 LT |
1259 | |
1260 | /* set a timeout value, so I don't stay here forever */ | |
5d0571d9 | 1261 | timeout = MAX_IRQ_LOOPS; |
1da177e4 LT |
1262 | |
1263 | do { | |
cfdfa865 | 1264 | status = SMC_GET_INT(lp); |
1da177e4 LT |
1265 | |
1266 | DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n", | |
1267 | dev->name, status, mask, | |
cfdfa865 MD |
1268 | ({ int meminfo; SMC_SELECT_BANK(lp, 0); |
1269 | meminfo = SMC_GET_MIR(lp); | |
1270 | SMC_SELECT_BANK(lp, 2); meminfo; }), | |
1271 | SMC_GET_FIFO(lp)); | |
1da177e4 LT |
1272 | |
1273 | status &= mask; | |
1274 | if (!status) | |
1275 | break; | |
1276 | ||
ea937560 NP |
1277 | if (status & IM_TX_INT) { |
1278 | /* do this before RX as it will free memory quickly */ | |
1da177e4 LT |
1279 | DBG(3, "%s: TX int\n", dev->name); |
1280 | smc_tx(dev); | |
cfdfa865 | 1281 | SMC_ACK_INT(lp, IM_TX_INT); |
1da177e4 LT |
1282 | if (THROTTLE_TX_PKTS) |
1283 | netif_wake_queue(dev); | |
ea937560 NP |
1284 | } else if (status & IM_RCV_INT) { |
1285 | DBG(3, "%s: RX irq\n", dev->name); | |
1286 | smc_rcv(dev); | |
1da177e4 LT |
1287 | } else if (status & IM_ALLOC_INT) { |
1288 | DBG(3, "%s: Allocation irq\n", dev->name); | |
1289 | tasklet_hi_schedule(&lp->tx_task); | |
1290 | mask &= ~IM_ALLOC_INT; | |
1291 | } else if (status & IM_TX_EMPTY_INT) { | |
1292 | DBG(3, "%s: TX empty\n", dev->name); | |
1293 | mask &= ~IM_TX_EMPTY_INT; | |
1294 | ||
1295 | /* update stats */ | |
cfdfa865 MD |
1296 | SMC_SELECT_BANK(lp, 0); |
1297 | card_stats = SMC_GET_COUNTER(lp); | |
1298 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 LT |
1299 | |
1300 | /* single collisions */ | |
09f75cd7 | 1301 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 LT |
1302 | card_stats >>= 4; |
1303 | ||
1304 | /* multiple collisions */ | |
09f75cd7 | 1305 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 | 1306 | } else if (status & IM_RX_OVRN_INT) { |
8de90115 | 1307 | DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name, |
cfdfa865 MD |
1308 | ({ int eph_st; SMC_SELECT_BANK(lp, 0); |
1309 | eph_st = SMC_GET_EPH_STATUS(lp); | |
1310 | SMC_SELECT_BANK(lp, 2); eph_st; })); | |
1311 | SMC_ACK_INT(lp, IM_RX_OVRN_INT); | |
09f75cd7 JG |
1312 | dev->stats.rx_errors++; |
1313 | dev->stats.rx_fifo_errors++; | |
1da177e4 LT |
1314 | } else if (status & IM_EPH_INT) { |
1315 | smc_eph_interrupt(dev); | |
1316 | } else if (status & IM_MDINT) { | |
cfdfa865 | 1317 | SMC_ACK_INT(lp, IM_MDINT); |
1da177e4 LT |
1318 | smc_phy_interrupt(dev); |
1319 | } else if (status & IM_ERCV_INT) { | |
cfdfa865 | 1320 | SMC_ACK_INT(lp, IM_ERCV_INT); |
1da177e4 LT |
1321 | PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name); |
1322 | } | |
1323 | } while (--timeout); | |
1324 | ||
1325 | /* restore register states */ | |
cfdfa865 MD |
1326 | SMC_SET_PTR(lp, saved_pointer); |
1327 | SMC_SET_INT_MASK(lp, mask); | |
1da177e4 LT |
1328 | spin_unlock(&lp->lock); |
1329 | ||
c500cb26 | 1330 | #ifndef CONFIG_NET_POLL_CONTROLLER |
5d0571d9 NP |
1331 | if (timeout == MAX_IRQ_LOOPS) |
1332 | PRINTK("%s: spurious interrupt (mask = 0x%02x)\n", | |
1333 | dev->name, mask); | |
c500cb26 | 1334 | #endif |
5d0571d9 NP |
1335 | DBG(3, "%s: Interrupt done (%d loops)\n", |
1336 | dev->name, MAX_IRQ_LOOPS - timeout); | |
1da177e4 LT |
1337 | |
1338 | /* | |
1339 | * We return IRQ_HANDLED unconditionally here even if there was | |
1340 | * nothing to do. There is a possibility that a packet might | |
1341 | * get enqueued into the chip right after TX_EMPTY_INT is raised | |
1342 | * but just before the CPU acknowledges the IRQ. | |
1343 | * Better take an unneeded IRQ in some occasions than complexifying | |
1344 | * the code for all cases. | |
1345 | */ | |
1346 | return IRQ_HANDLED; | |
1347 | } | |
1348 | ||
1349 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1350 | /* | |
1351 | * Polling receive - used by netconsole and other diagnostic tools | |
1352 | * to allow network i/o with interrupts disabled. | |
1353 | */ | |
1354 | static void smc_poll_controller(struct net_device *dev) | |
1355 | { | |
1356 | disable_irq(dev->irq); | |
9c8e7f5c | 1357 | smc_interrupt(dev->irq, dev); |
1da177e4 LT |
1358 | enable_irq(dev->irq); |
1359 | } | |
1360 | #endif | |
1361 | ||
1362 | /* Our watchdog timed out. Called by the networking layer */ | |
1363 | static void smc_timeout(struct net_device *dev) | |
1364 | { | |
1365 | struct smc_local *lp = netdev_priv(dev); | |
1366 | void __iomem *ioaddr = lp->base; | |
8de90115 | 1367 | int status, mask, eph_st, meminfo, fifo; |
1da177e4 LT |
1368 | |
1369 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
1370 | ||
1371 | spin_lock_irq(&lp->lock); | |
cfdfa865 MD |
1372 | status = SMC_GET_INT(lp); |
1373 | mask = SMC_GET_INT_MASK(lp); | |
1374 | fifo = SMC_GET_FIFO(lp); | |
1375 | SMC_SELECT_BANK(lp, 0); | |
1376 | eph_st = SMC_GET_EPH_STATUS(lp); | |
1377 | meminfo = SMC_GET_MIR(lp); | |
1378 | SMC_SELECT_BANK(lp, 2); | |
1da177e4 | 1379 | spin_unlock_irq(&lp->lock); |
8de90115 NP |
1380 | PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x " |
1381 | "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n", | |
1382 | dev->name, status, mask, meminfo, fifo, eph_st ); | |
1da177e4 LT |
1383 | |
1384 | smc_reset(dev); | |
1385 | smc_enable(dev); | |
1386 | ||
1387 | /* | |
1388 | * Reconfiguring the PHY doesn't seem like a bad idea here, but | |
1389 | * smc_phy_configure() calls msleep() which calls schedule_timeout() | |
1390 | * which calls schedule(). Hence we use a work queue. | |
1391 | */ | |
1392 | if (lp->phy_type != 0) { | |
1393 | if (schedule_work(&lp->phy_configure)) { | |
1394 | lp->work_pending = 1; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | /* We can accept TX packets again */ | |
1399 | dev->trans_start = jiffies; | |
1400 | netif_wake_queue(dev); | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * This routine will, depending on the values passed to it, | |
1405 | * either make it accept multicast packets, go into | |
1406 | * promiscuous mode (for TCPDUMP and cousins) or accept | |
1407 | * a select set of multicast packets | |
1408 | */ | |
1409 | static void smc_set_multicast_list(struct net_device *dev) | |
1410 | { | |
1411 | struct smc_local *lp = netdev_priv(dev); | |
1412 | void __iomem *ioaddr = lp->base; | |
1413 | unsigned char multicast_table[8]; | |
1414 | int update_multicast = 0; | |
1415 | ||
1416 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
1417 | ||
1418 | if (dev->flags & IFF_PROMISC) { | |
1419 | DBG(2, "%s: RCR_PRMS\n", dev->name); | |
1420 | lp->rcr_cur_mode |= RCR_PRMS; | |
1421 | } | |
1422 | ||
1423 | /* BUG? I never disable promiscuous mode if multicasting was turned on. | |
1424 | Now, I turn off promiscuous mode, but I don't do anything to multicasting | |
1425 | when promiscuous mode is turned on. | |
1426 | */ | |
1427 | ||
1428 | /* | |
1429 | * Here, I am setting this to accept all multicast packets. | |
1430 | * I don't need to zero the multicast table, because the flag is | |
1431 | * checked before the table is | |
1432 | */ | |
1433 | else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) { | |
1434 | DBG(2, "%s: RCR_ALMUL\n", dev->name); | |
1435 | lp->rcr_cur_mode |= RCR_ALMUL; | |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * This sets the internal hardware table to filter out unwanted | |
1440 | * multicast packets before they take up memory. | |
1441 | * | |
1442 | * The SMC chip uses a hash table where the high 6 bits of the CRC of | |
1443 | * address are the offset into the table. If that bit is 1, then the | |
1444 | * multicast packet is accepted. Otherwise, it's dropped silently. | |
1445 | * | |
1446 | * To use the 6 bits as an offset into the table, the high 3 bits are | |
1447 | * the number of the 8 bit register, while the low 3 bits are the bit | |
1448 | * within that register. | |
1449 | */ | |
1450 | else if (dev->mc_count) { | |
1451 | int i; | |
1452 | struct dev_mc_list *cur_addr; | |
1453 | ||
1454 | /* table for flipping the order of 3 bits */ | |
1455 | static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7}; | |
1456 | ||
1457 | /* start with a table of all zeros: reject all */ | |
1458 | memset(multicast_table, 0, sizeof(multicast_table)); | |
1459 | ||
1460 | cur_addr = dev->mc_list; | |
1461 | for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) { | |
1462 | int position; | |
1463 | ||
1464 | /* do we have a pointer here? */ | |
1465 | if (!cur_addr) | |
1466 | break; | |
1467 | /* make sure this is a multicast address - | |
1468 | shouldn't this be a given if we have it here ? */ | |
1469 | if (!(*cur_addr->dmi_addr & 1)) | |
1470 | continue; | |
1471 | ||
1472 | /* only use the low order bits */ | |
1473 | position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f; | |
1474 | ||
1475 | /* do some messy swapping to put the bit in the right spot */ | |
1476 | multicast_table[invert3[position&7]] |= | |
1477 | (1<<invert3[(position>>3)&7]); | |
1478 | } | |
1479 | ||
1480 | /* be sure I get rid of flags I might have set */ | |
1481 | lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL); | |
1482 | ||
1483 | /* now, the table can be loaded into the chipset */ | |
1484 | update_multicast = 1; | |
1485 | } else { | |
1486 | DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name); | |
1487 | lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL); | |
1488 | ||
1489 | /* | |
1490 | * since I'm disabling all multicast entirely, I need to | |
1491 | * clear the multicast list | |
1492 | */ | |
1493 | memset(multicast_table, 0, sizeof(multicast_table)); | |
1494 | update_multicast = 1; | |
1495 | } | |
1496 | ||
1497 | spin_lock_irq(&lp->lock); | |
cfdfa865 MD |
1498 | SMC_SELECT_BANK(lp, 0); |
1499 | SMC_SET_RCR(lp, lp->rcr_cur_mode); | |
1da177e4 | 1500 | if (update_multicast) { |
cfdfa865 MD |
1501 | SMC_SELECT_BANK(lp, 3); |
1502 | SMC_SET_MCAST(lp, multicast_table); | |
1da177e4 | 1503 | } |
cfdfa865 | 1504 | SMC_SELECT_BANK(lp, 2); |
1da177e4 LT |
1505 | spin_unlock_irq(&lp->lock); |
1506 | } | |
1507 | ||
1508 | ||
1509 | /* | |
1510 | * Open and Initialize the board | |
1511 | * | |
1512 | * Set up everything, reset the card, etc.. | |
1513 | */ | |
1514 | static int | |
1515 | smc_open(struct net_device *dev) | |
1516 | { | |
1517 | struct smc_local *lp = netdev_priv(dev); | |
1518 | ||
1519 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
1520 | ||
1521 | /* | |
1522 | * Check that the address is valid. If its not, refuse | |
1523 | * to bring the device up. The user must specify an | |
1524 | * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx | |
1525 | */ | |
1526 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
1527 | PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__); | |
1528 | return -EINVAL; | |
1529 | } | |
1530 | ||
1531 | /* Setup the default Register Modes */ | |
1532 | lp->tcr_cur_mode = TCR_DEFAULT; | |
1533 | lp->rcr_cur_mode = RCR_DEFAULT; | |
1534 | lp->rpc_cur_mode = RPC_DEFAULT; | |
1535 | ||
1536 | /* | |
1537 | * If we are not using a MII interface, we need to | |
1538 | * monitor our own carrier signal to detect faults. | |
1539 | */ | |
1540 | if (lp->phy_type == 0) | |
1541 | lp->tcr_cur_mode |= TCR_MON_CSN; | |
1542 | ||
1543 | /* reset the hardware */ | |
1544 | smc_reset(dev); | |
1545 | smc_enable(dev); | |
1546 | ||
1547 | /* Configure the PHY, initialize the link state */ | |
1548 | if (lp->phy_type != 0) | |
6d5aefb8 | 1549 | smc_phy_configure(&lp->phy_configure); |
1da177e4 LT |
1550 | else { |
1551 | spin_lock_irq(&lp->lock); | |
1552 | smc_10bt_check_media(dev, 1); | |
1553 | spin_unlock_irq(&lp->lock); | |
1554 | } | |
1555 | ||
1556 | netif_start_queue(dev); | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * smc_close | |
1562 | * | |
1563 | * this makes the board clean up everything that it can | |
1564 | * and not talk to the outside world. Caused by | |
1565 | * an 'ifconfig ethX down' | |
1566 | */ | |
1567 | static int smc_close(struct net_device *dev) | |
1568 | { | |
1569 | struct smc_local *lp = netdev_priv(dev); | |
1570 | ||
1571 | DBG(2, "%s: %s\n", dev->name, __FUNCTION__); | |
1572 | ||
1573 | netif_stop_queue(dev); | |
1574 | netif_carrier_off(dev); | |
1575 | ||
1576 | /* clear everything */ | |
1577 | smc_shutdown(dev); | |
be83668a | 1578 | tasklet_kill(&lp->tx_task); |
1da177e4 | 1579 | smc_phy_powerdown(dev); |
1da177e4 LT |
1580 | return 0; |
1581 | } | |
1582 | ||
1da177e4 LT |
1583 | /* |
1584 | * Ethtool support | |
1585 | */ | |
1586 | static int | |
1587 | smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1588 | { | |
1589 | struct smc_local *lp = netdev_priv(dev); | |
1590 | int ret; | |
1591 | ||
1592 | cmd->maxtxpkt = 1; | |
1593 | cmd->maxrxpkt = 1; | |
1594 | ||
1595 | if (lp->phy_type != 0) { | |
1596 | spin_lock_irq(&lp->lock); | |
1597 | ret = mii_ethtool_gset(&lp->mii, cmd); | |
1598 | spin_unlock_irq(&lp->lock); | |
1599 | } else { | |
1600 | cmd->supported = SUPPORTED_10baseT_Half | | |
1601 | SUPPORTED_10baseT_Full | | |
1602 | SUPPORTED_TP | SUPPORTED_AUI; | |
1603 | ||
1604 | if (lp->ctl_rspeed == 10) | |
1605 | cmd->speed = SPEED_10; | |
1606 | else if (lp->ctl_rspeed == 100) | |
1607 | cmd->speed = SPEED_100; | |
1608 | ||
1609 | cmd->autoneg = AUTONEG_DISABLE; | |
1610 | cmd->transceiver = XCVR_INTERNAL; | |
1611 | cmd->port = 0; | |
1612 | cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF; | |
1613 | ||
1614 | ret = 0; | |
1615 | } | |
1616 | ||
1617 | return ret; | |
1618 | } | |
1619 | ||
1620 | static int | |
1621 | smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1622 | { | |
1623 | struct smc_local *lp = netdev_priv(dev); | |
1624 | int ret; | |
1625 | ||
1626 | if (lp->phy_type != 0) { | |
1627 | spin_lock_irq(&lp->lock); | |
1628 | ret = mii_ethtool_sset(&lp->mii, cmd); | |
1629 | spin_unlock_irq(&lp->lock); | |
1630 | } else { | |
1631 | if (cmd->autoneg != AUTONEG_DISABLE || | |
1632 | cmd->speed != SPEED_10 || | |
1633 | (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) || | |
1634 | (cmd->port != PORT_TP && cmd->port != PORT_AUI)) | |
1635 | return -EINVAL; | |
1636 | ||
1637 | // lp->port = cmd->port; | |
1638 | lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL; | |
1639 | ||
1640 | // if (netif_running(dev)) | |
1641 | // smc_set_port(dev); | |
1642 | ||
1643 | ret = 0; | |
1644 | } | |
1645 | ||
1646 | return ret; | |
1647 | } | |
1648 | ||
1649 | static void | |
1650 | smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1651 | { | |
1652 | strncpy(info->driver, CARDNAME, sizeof(info->driver)); | |
1653 | strncpy(info->version, version, sizeof(info->version)); | |
43cb76d9 | 1654 | strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info)); |
1da177e4 LT |
1655 | } |
1656 | ||
1657 | static int smc_ethtool_nwayreset(struct net_device *dev) | |
1658 | { | |
1659 | struct smc_local *lp = netdev_priv(dev); | |
1660 | int ret = -EINVAL; | |
1661 | ||
1662 | if (lp->phy_type != 0) { | |
1663 | spin_lock_irq(&lp->lock); | |
1664 | ret = mii_nway_restart(&lp->mii); | |
1665 | spin_unlock_irq(&lp->lock); | |
1666 | } | |
1667 | ||
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | static u32 smc_ethtool_getmsglevel(struct net_device *dev) | |
1672 | { | |
1673 | struct smc_local *lp = netdev_priv(dev); | |
1674 | return lp->msg_enable; | |
1675 | } | |
1676 | ||
1677 | static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level) | |
1678 | { | |
1679 | struct smc_local *lp = netdev_priv(dev); | |
1680 | lp->msg_enable = level; | |
1681 | } | |
1682 | ||
7282d491 | 1683 | static const struct ethtool_ops smc_ethtool_ops = { |
1da177e4 LT |
1684 | .get_settings = smc_ethtool_getsettings, |
1685 | .set_settings = smc_ethtool_setsettings, | |
1686 | .get_drvinfo = smc_ethtool_getdrvinfo, | |
1687 | ||
1688 | .get_msglevel = smc_ethtool_getmsglevel, | |
1689 | .set_msglevel = smc_ethtool_setmsglevel, | |
1690 | .nway_reset = smc_ethtool_nwayreset, | |
1691 | .get_link = ethtool_op_get_link, | |
1692 | // .get_eeprom = smc_ethtool_geteeprom, | |
1693 | // .set_eeprom = smc_ethtool_seteeprom, | |
1694 | }; | |
1695 | ||
1696 | /* | |
1697 | * smc_findirq | |
1698 | * | |
1699 | * This routine has a simple purpose -- make the SMC chip generate an | |
1700 | * interrupt, so an auto-detect routine can detect it, and find the IRQ, | |
1701 | */ | |
1702 | /* | |
1703 | * does this still work? | |
1704 | * | |
1705 | * I just deleted auto_irq.c, since it was never built... | |
1706 | * --jgarzik | |
1707 | */ | |
cfdfa865 | 1708 | static int __init smc_findirq(struct smc_local *lp) |
1da177e4 | 1709 | { |
cfdfa865 | 1710 | void __iomem *ioaddr = lp->base; |
1da177e4 LT |
1711 | int timeout = 20; |
1712 | unsigned long cookie; | |
1713 | ||
1714 | DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__); | |
1715 | ||
1716 | cookie = probe_irq_on(); | |
1717 | ||
1718 | /* | |
1719 | * What I try to do here is trigger an ALLOC_INT. This is done | |
1720 | * by allocating a small chunk of memory, which will give an interrupt | |
1721 | * when done. | |
1722 | */ | |
1723 | /* enable ALLOCation interrupts ONLY */ | |
cfdfa865 MD |
1724 | SMC_SELECT_BANK(lp, 2); |
1725 | SMC_SET_INT_MASK(lp, IM_ALLOC_INT); | |
1da177e4 LT |
1726 | |
1727 | /* | |
1728 | * Allocate 512 bytes of memory. Note that the chip was just | |
1729 | * reset so all the memory is available | |
1730 | */ | |
cfdfa865 | 1731 | SMC_SET_MMU_CMD(lp, MC_ALLOC | 1); |
1da177e4 LT |
1732 | |
1733 | /* | |
1734 | * Wait until positive that the interrupt has been generated | |
1735 | */ | |
1736 | do { | |
1737 | int int_status; | |
1738 | udelay(10); | |
cfdfa865 | 1739 | int_status = SMC_GET_INT(lp); |
1da177e4 LT |
1740 | if (int_status & IM_ALLOC_INT) |
1741 | break; /* got the interrupt */ | |
1742 | } while (--timeout); | |
1743 | ||
1744 | /* | |
1745 | * there is really nothing that I can do here if timeout fails, | |
1746 | * as autoirq_report will return a 0 anyway, which is what I | |
1747 | * want in this case. Plus, the clean up is needed in both | |
1748 | * cases. | |
1749 | */ | |
1750 | ||
1751 | /* and disable all interrupts again */ | |
cfdfa865 | 1752 | SMC_SET_INT_MASK(lp, 0); |
1da177e4 LT |
1753 | |
1754 | /* and return what I found */ | |
1755 | return probe_irq_off(cookie); | |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * Function: smc_probe(unsigned long ioaddr) | |
1760 | * | |
1761 | * Purpose: | |
1762 | * Tests to see if a given ioaddr points to an SMC91x chip. | |
1763 | * Returns a 0 on success | |
1764 | * | |
1765 | * Algorithm: | |
1766 | * (1) see if the high byte of BANK_SELECT is 0x33 | |
1767 | * (2) compare the ioaddr with the base register's address | |
1768 | * (3) see if I recognize the chip ID in the appropriate register | |
1769 | * | |
1770 | * Here I do typical initialization tasks. | |
1771 | * | |
1772 | * o Initialize the structure if needed | |
1773 | * o print out my vanity message if not done so already | |
1774 | * o print out what type of hardware is detected | |
1775 | * o print out the ethernet address | |
1776 | * o find the IRQ | |
1777 | * o set up my private data | |
1778 | * o configure the dev structure with my subroutines | |
1779 | * o actually GRAB the irq. | |
1780 | * o GRAB the region | |
1781 | */ | |
e7b3dc7e RK |
1782 | static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr, |
1783 | unsigned long irq_flags) | |
1da177e4 LT |
1784 | { |
1785 | struct smc_local *lp = netdev_priv(dev); | |
1786 | static int version_printed = 0; | |
0795af57 | 1787 | int retval; |
1da177e4 LT |
1788 | unsigned int val, revision_register; |
1789 | const char *version_string; | |
0795af57 | 1790 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
1791 | |
1792 | DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__); | |
1793 | ||
1794 | /* First, see if the high byte is 0x33 */ | |
cfdfa865 | 1795 | val = SMC_CURRENT_BANK(lp); |
1da177e4 LT |
1796 | DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val); |
1797 | if ((val & 0xFF00) != 0x3300) { | |
1798 | if ((val & 0xFF) == 0x33) { | |
1799 | printk(KERN_WARNING | |
1800 | "%s: Detected possible byte-swapped interface" | |
1801 | " at IOADDR %p\n", CARDNAME, ioaddr); | |
1802 | } | |
1803 | retval = -ENODEV; | |
1804 | goto err_out; | |
1805 | } | |
1806 | ||
1807 | /* | |
1808 | * The above MIGHT indicate a device, but I need to write to | |
1809 | * further test this. | |
1810 | */ | |
cfdfa865 MD |
1811 | SMC_SELECT_BANK(lp, 0); |
1812 | val = SMC_CURRENT_BANK(lp); | |
1da177e4 LT |
1813 | if ((val & 0xFF00) != 0x3300) { |
1814 | retval = -ENODEV; | |
1815 | goto err_out; | |
1816 | } | |
1817 | ||
1818 | /* | |
1819 | * well, we've already written once, so hopefully another | |
1820 | * time won't hurt. This time, I need to switch the bank | |
1821 | * register to bank 1, so I can access the base address | |
1822 | * register | |
1823 | */ | |
cfdfa865 MD |
1824 | SMC_SELECT_BANK(lp, 1); |
1825 | val = SMC_GET_BASE(lp); | |
1da177e4 | 1826 | val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT; |
53155109 | 1827 | if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) { |
1da177e4 LT |
1828 | printk("%s: IOADDR %p doesn't match configuration (%x).\n", |
1829 | CARDNAME, ioaddr, val); | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * check if the revision register is something that I | |
1834 | * recognize. These might need to be added to later, | |
1835 | * as future revisions could be added. | |
1836 | */ | |
cfdfa865 MD |
1837 | SMC_SELECT_BANK(lp, 3); |
1838 | revision_register = SMC_GET_REV(lp); | |
1da177e4 LT |
1839 | DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register); |
1840 | version_string = chip_ids[ (revision_register >> 4) & 0xF]; | |
1841 | if (!version_string || (revision_register & 0xff00) != 0x3300) { | |
1842 | /* I don't recognize this chip, so... */ | |
1843 | printk("%s: IO %p: Unrecognized revision register 0x%04x" | |
1844 | ", Contact author.\n", CARDNAME, | |
1845 | ioaddr, revision_register); | |
1846 | ||
1847 | retval = -ENODEV; | |
1848 | goto err_out; | |
1849 | } | |
1850 | ||
1851 | /* At this point I'll assume that the chip is an SMC91x. */ | |
1852 | if (version_printed++ == 0) | |
1853 | printk("%s", version); | |
1854 | ||
1855 | /* fill in some of the fields */ | |
1856 | dev->base_addr = (unsigned long)ioaddr; | |
1857 | lp->base = ioaddr; | |
1858 | lp->version = revision_register & 0xff; | |
1859 | spin_lock_init(&lp->lock); | |
1860 | ||
1861 | /* Get the MAC address */ | |
cfdfa865 MD |
1862 | SMC_SELECT_BANK(lp, 1); |
1863 | SMC_GET_MAC_ADDR(lp, dev->dev_addr); | |
1da177e4 LT |
1864 | |
1865 | /* now, reset the chip, and put it into a known state */ | |
1866 | smc_reset(dev); | |
1867 | ||
1868 | /* | |
1869 | * If dev->irq is 0, then the device has to be banged on to see | |
1870 | * what the IRQ is. | |
1871 | * | |
1872 | * This banging doesn't always detect the IRQ, for unknown reasons. | |
1873 | * a workaround is to reset the chip and try again. | |
1874 | * | |
1875 | * Interestingly, the DOS packet driver *SETS* the IRQ on the card to | |
1876 | * be what is requested on the command line. I don't do that, mostly | |
1877 | * because the card that I have uses a non-standard method of accessing | |
1878 | * the IRQs, and because this _should_ work in most configurations. | |
1879 | * | |
1880 | * Specifying an IRQ is done with the assumption that the user knows | |
1881 | * what (s)he is doing. No checking is done!!!! | |
1882 | */ | |
1883 | if (dev->irq < 1) { | |
1884 | int trials; | |
1885 | ||
1886 | trials = 3; | |
1887 | while (trials--) { | |
cfdfa865 | 1888 | dev->irq = smc_findirq(lp); |
1da177e4 LT |
1889 | if (dev->irq) |
1890 | break; | |
1891 | /* kick the card and try again */ | |
1892 | smc_reset(dev); | |
1893 | } | |
1894 | } | |
1895 | if (dev->irq == 0) { | |
1896 | printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n", | |
1897 | dev->name); | |
1898 | retval = -ENODEV; | |
1899 | goto err_out; | |
1900 | } | |
1901 | dev->irq = irq_canonicalize(dev->irq); | |
1902 | ||
1903 | /* Fill in the fields of the device structure with ethernet values. */ | |
1904 | ether_setup(dev); | |
1905 | ||
1906 | dev->open = smc_open; | |
1907 | dev->stop = smc_close; | |
1908 | dev->hard_start_xmit = smc_hard_start_xmit; | |
1909 | dev->tx_timeout = smc_timeout; | |
1910 | dev->watchdog_timeo = msecs_to_jiffies(watchdog); | |
1da177e4 LT |
1911 | dev->set_multicast_list = smc_set_multicast_list; |
1912 | dev->ethtool_ops = &smc_ethtool_ops; | |
1913 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1914 | dev->poll_controller = smc_poll_controller; | |
1915 | #endif | |
1916 | ||
1917 | tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev); | |
6d5aefb8 DH |
1918 | INIT_WORK(&lp->phy_configure, smc_phy_configure); |
1919 | lp->dev = dev; | |
1da177e4 LT |
1920 | lp->mii.phy_id_mask = 0x1f; |
1921 | lp->mii.reg_num_mask = 0x1f; | |
1922 | lp->mii.force_media = 0; | |
1923 | lp->mii.full_duplex = 0; | |
1924 | lp->mii.dev = dev; | |
1925 | lp->mii.mdio_read = smc_phy_read; | |
1926 | lp->mii.mdio_write = smc_phy_write; | |
1927 | ||
1928 | /* | |
1929 | * Locate the phy, if any. | |
1930 | */ | |
1931 | if (lp->version >= (CHIP_91100 << 4)) | |
1932 | smc_phy_detect(dev); | |
1933 | ||
99e1baf8 NP |
1934 | /* then shut everything down to save power */ |
1935 | smc_shutdown(dev); | |
1936 | smc_phy_powerdown(dev); | |
1937 | ||
1da177e4 LT |
1938 | /* Set default parameters */ |
1939 | lp->msg_enable = NETIF_MSG_LINK; | |
1940 | lp->ctl_rfduplx = 0; | |
1941 | lp->ctl_rspeed = 10; | |
1942 | ||
1943 | if (lp->version >= (CHIP_91100 << 4)) { | |
1944 | lp->ctl_rfduplx = 1; | |
1945 | lp->ctl_rspeed = 100; | |
1946 | } | |
1947 | ||
1948 | /* Grab the IRQ */ | |
e7b3dc7e | 1949 | retval = request_irq(dev->irq, &smc_interrupt, irq_flags, dev->name, dev); |
1da177e4 LT |
1950 | if (retval) |
1951 | goto err_out; | |
1952 | ||
1da177e4 LT |
1953 | #ifdef SMC_USE_PXA_DMA |
1954 | { | |
1955 | int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW, | |
1956 | smc_pxa_dma_irq, NULL); | |
1957 | if (dma >= 0) | |
1958 | dev->dma = dma; | |
1959 | } | |
1960 | #endif | |
1961 | ||
1962 | retval = register_netdev(dev); | |
1963 | if (retval == 0) { | |
1964 | /* now, print out the card info, in a short format.. */ | |
1965 | printk("%s: %s (rev %d) at %p IRQ %d", | |
1966 | dev->name, version_string, revision_register & 0x0f, | |
1967 | lp->base, dev->irq); | |
1968 | ||
1969 | if (dev->dma != (unsigned char)-1) | |
1970 | printk(" DMA %d", dev->dma); | |
1971 | ||
1972 | printk("%s%s\n", nowait ? " [nowait]" : "", | |
1973 | THROTTLE_TX_PKTS ? " [throttle_tx]" : ""); | |
1974 | ||
1975 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
1976 | printk("%s: Invalid ethernet MAC address. Please " | |
1977 | "set using ifconfig\n", dev->name); | |
1978 | } else { | |
1979 | /* Print the Ethernet address */ | |
0795af57 JP |
1980 | printk("%s: Ethernet addr: %s\n", |
1981 | dev->name, print_mac(mac, dev->dev_addr)); | |
1da177e4 LT |
1982 | } |
1983 | ||
1984 | if (lp->phy_type == 0) { | |
1985 | PRINTK("%s: No PHY found\n", dev->name); | |
1986 | } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) { | |
1987 | PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name); | |
1988 | } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) { | |
1989 | PRINTK("%s: PHY LAN83C180\n", dev->name); | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | err_out: | |
1994 | #ifdef SMC_USE_PXA_DMA | |
1995 | if (retval && dev->dma != (unsigned char)-1) | |
1996 | pxa_free_dma(dev->dma); | |
1997 | #endif | |
1998 | return retval; | |
1999 | } | |
2000 | ||
2001 | static int smc_enable_device(struct platform_device *pdev) | |
2002 | { | |
3e947943 MD |
2003 | struct net_device *ndev = platform_get_drvdata(pdev); |
2004 | struct smc_local *lp = netdev_priv(ndev); | |
1da177e4 LT |
2005 | unsigned long flags; |
2006 | unsigned char ecor, ecsr; | |
2007 | void __iomem *addr; | |
2008 | struct resource * res; | |
2009 | ||
2010 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib"); | |
2011 | if (!res) | |
2012 | return 0; | |
2013 | ||
2014 | /* | |
2015 | * Map the attribute space. This is overkill, but clean. | |
2016 | */ | |
2017 | addr = ioremap(res->start, ATTRIB_SIZE); | |
2018 | if (!addr) | |
2019 | return -ENOMEM; | |
2020 | ||
2021 | /* | |
2022 | * Reset the device. We must disable IRQs around this | |
2023 | * since a reset causes the IRQ line become active. | |
2024 | */ | |
2025 | local_irq_save(flags); | |
2026 | ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET; | |
2027 | writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT)); | |
2028 | readb(addr + (ECOR << SMC_IO_SHIFT)); | |
2029 | ||
2030 | /* | |
2031 | * Wait 100us for the chip to reset. | |
2032 | */ | |
2033 | udelay(100); | |
2034 | ||
2035 | /* | |
2036 | * The device will ignore all writes to the enable bit while | |
2037 | * reset is asserted, even if the reset bit is cleared in the | |
2038 | * same write. Must clear reset first, then enable the device. | |
2039 | */ | |
2040 | writeb(ecor, addr + (ECOR << SMC_IO_SHIFT)); | |
2041 | writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT)); | |
2042 | ||
2043 | /* | |
2044 | * Set the appropriate byte/word mode. | |
2045 | */ | |
2046 | ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8; | |
3e947943 | 2047 | if (!SMC_16BIT(lp)) |
09779c6d | 2048 | ecsr |= ECSR_IOIS8; |
1da177e4 LT |
2049 | writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT)); |
2050 | local_irq_restore(flags); | |
2051 | ||
2052 | iounmap(addr); | |
2053 | ||
2054 | /* | |
2055 | * Wait for the chip to wake up. We could poll the control | |
2056 | * register in the main register space, but that isn't mapped | |
2057 | * yet. We know this is going to take 750us. | |
2058 | */ | |
2059 | msleep(1); | |
2060 | ||
2061 | return 0; | |
2062 | } | |
2063 | ||
2064 | static int smc_request_attrib(struct platform_device *pdev) | |
2065 | { | |
2066 | struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib"); | |
2067 | ||
2068 | if (!res) | |
2069 | return 0; | |
2070 | ||
2071 | if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME)) | |
2072 | return -EBUSY; | |
2073 | ||
2074 | return 0; | |
2075 | } | |
2076 | ||
2077 | static void smc_release_attrib(struct platform_device *pdev) | |
2078 | { | |
2079 | struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib"); | |
2080 | ||
2081 | if (res) | |
2082 | release_mem_region(res->start, ATTRIB_SIZE); | |
2083 | } | |
2084 | ||
09779c6d | 2085 | static inline void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev) |
1da177e4 | 2086 | { |
09779c6d NP |
2087 | if (SMC_CAN_USE_DATACS) { |
2088 | struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32"); | |
2089 | struct smc_local *lp = netdev_priv(ndev); | |
1da177e4 | 2090 | |
09779c6d NP |
2091 | if (!res) |
2092 | return; | |
1da177e4 | 2093 | |
09779c6d NP |
2094 | if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) { |
2095 | printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME); | |
2096 | return; | |
2097 | } | |
1da177e4 | 2098 | |
09779c6d NP |
2099 | lp->datacs = ioremap(res->start, SMC_DATA_EXTENT); |
2100 | } | |
1da177e4 LT |
2101 | } |
2102 | ||
2103 | static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev) | |
2104 | { | |
09779c6d NP |
2105 | if (SMC_CAN_USE_DATACS) { |
2106 | struct smc_local *lp = netdev_priv(ndev); | |
2107 | struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32"); | |
1da177e4 | 2108 | |
09779c6d NP |
2109 | if (lp->datacs) |
2110 | iounmap(lp->datacs); | |
1da177e4 | 2111 | |
09779c6d | 2112 | lp->datacs = NULL; |
1da177e4 | 2113 | |
09779c6d NP |
2114 | if (res) |
2115 | release_mem_region(res->start, SMC_DATA_EXTENT); | |
2116 | } | |
1da177e4 | 2117 | } |
1da177e4 LT |
2118 | |
2119 | /* | |
2120 | * smc_init(void) | |
2121 | * Input parameters: | |
2122 | * dev->base_addr == 0, try to find all possible locations | |
2123 | * dev->base_addr > 0x1ff, this is the address to check | |
2124 | * dev->base_addr == <anything else>, return failure code | |
2125 | * | |
2126 | * Output: | |
2127 | * 0 --> there is a device | |
2128 | * anything else, error | |
2129 | */ | |
3ae5eaec | 2130 | static int smc_drv_probe(struct platform_device *pdev) |
1da177e4 | 2131 | { |
3e947943 MD |
2132 | struct smc91x_platdata *pd = pdev->dev.platform_data; |
2133 | struct smc_local *lp; | |
1da177e4 | 2134 | struct net_device *ndev; |
e7b3dc7e | 2135 | struct resource *res, *ires; |
1da177e4 LT |
2136 | unsigned int __iomem *addr; |
2137 | int ret; | |
2138 | ||
2139 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs"); | |
2140 | if (!res) | |
2141 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2142 | if (!res) { | |
2143 | ret = -ENODEV; | |
2144 | goto out; | |
2145 | } | |
2146 | ||
2147 | ||
2148 | if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) { | |
2149 | ret = -EBUSY; | |
2150 | goto out; | |
2151 | } | |
2152 | ||
2153 | ndev = alloc_etherdev(sizeof(struct smc_local)); | |
2154 | if (!ndev) { | |
2155 | printk("%s: could not allocate device.\n", CARDNAME); | |
2156 | ret = -ENOMEM; | |
2157 | goto out_release_io; | |
2158 | } | |
3ae5eaec | 2159 | SET_NETDEV_DEV(ndev, &pdev->dev); |
1da177e4 | 2160 | |
3e947943 MD |
2161 | /* get configuration from platform data, only allow use of |
2162 | * bus width if both SMC_CAN_USE_xxx and SMC91X_USE_xxx are set. | |
2163 | */ | |
2164 | ||
2165 | lp = netdev_priv(ndev); | |
2166 | lp->cfg.irq_flags = SMC_IRQ_FLAGS; | |
2167 | ||
2168 | #ifdef SMC_DYNAMIC_BUS_CONFIG | |
2169 | if (pd) | |
2170 | memcpy(&lp->cfg, pd, sizeof(lp->cfg)); | |
2171 | else { | |
2172 | lp->cfg.flags = SMC91X_USE_8BIT; | |
2173 | lp->cfg.flags |= SMC91X_USE_16BIT; | |
2174 | lp->cfg.flags |= SMC91X_USE_32BIT; | |
2175 | } | |
2176 | ||
2177 | lp->cfg.flags &= ~(SMC_CAN_USE_8BIT ? 0 : SMC91X_USE_8BIT); | |
2178 | lp->cfg.flags &= ~(SMC_CAN_USE_16BIT ? 0 : SMC91X_USE_16BIT); | |
2179 | lp->cfg.flags &= ~(SMC_CAN_USE_32BIT ? 0 : SMC91X_USE_32BIT); | |
2180 | #endif | |
2181 | ||
1da177e4 | 2182 | ndev->dma = (unsigned char)-1; |
e7b3dc7e RK |
2183 | |
2184 | ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2185 | if (!ires) { | |
48944738 DV |
2186 | ret = -ENODEV; |
2187 | goto out_free_netdev; | |
2188 | } | |
1da177e4 | 2189 | |
e7b3dc7e RK |
2190 | ndev->irq = ires->start; |
2191 | if (SMC_IRQ_FLAGS == -1) | |
3e947943 | 2192 | lp->cfg.irq_flags = ires->flags & IRQF_TRIGGER_MASK; |
e7b3dc7e | 2193 | |
1da177e4 LT |
2194 | ret = smc_request_attrib(pdev); |
2195 | if (ret) | |
2196 | goto out_free_netdev; | |
2197 | #if defined(CONFIG_SA1100_ASSABET) | |
2198 | NCR_0 |= NCR_ENET_OSC_EN; | |
2199 | #endif | |
3e947943 | 2200 | platform_set_drvdata(pdev, ndev); |
1da177e4 LT |
2201 | ret = smc_enable_device(pdev); |
2202 | if (ret) | |
2203 | goto out_release_attrib; | |
2204 | ||
2205 | addr = ioremap(res->start, SMC_IO_EXTENT); | |
2206 | if (!addr) { | |
2207 | ret = -ENOMEM; | |
2208 | goto out_release_attrib; | |
2209 | } | |
2210 | ||
1da177e4 | 2211 | #ifdef SMC_USE_PXA_DMA |
073ac8fd | 2212 | { |
1da177e4 | 2213 | struct smc_local *lp = netdev_priv(ndev); |
073ac8fd | 2214 | lp->device = &pdev->dev; |
1da177e4 LT |
2215 | lp->physaddr = res->start; |
2216 | } | |
2217 | #endif | |
2218 | ||
3e947943 | 2219 | ret = smc_probe(ndev, addr, lp->cfg.irq_flags); |
073ac8fd RK |
2220 | if (ret != 0) |
2221 | goto out_iounmap; | |
2222 | ||
1da177e4 LT |
2223 | smc_request_datacs(pdev, ndev); |
2224 | ||
2225 | return 0; | |
2226 | ||
2227 | out_iounmap: | |
3ae5eaec | 2228 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
2229 | iounmap(addr); |
2230 | out_release_attrib: | |
2231 | smc_release_attrib(pdev); | |
2232 | out_free_netdev: | |
2233 | free_netdev(ndev); | |
2234 | out_release_io: | |
2235 | release_mem_region(res->start, SMC_IO_EXTENT); | |
2236 | out: | |
2237 | printk("%s: not found (%d).\n", CARDNAME, ret); | |
2238 | ||
2239 | return ret; | |
2240 | } | |
2241 | ||
3ae5eaec | 2242 | static int smc_drv_remove(struct platform_device *pdev) |
1da177e4 | 2243 | { |
3ae5eaec | 2244 | struct net_device *ndev = platform_get_drvdata(pdev); |
1da177e4 LT |
2245 | struct smc_local *lp = netdev_priv(ndev); |
2246 | struct resource *res; | |
2247 | ||
3ae5eaec | 2248 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
2249 | |
2250 | unregister_netdev(ndev); | |
2251 | ||
2252 | free_irq(ndev->irq, ndev); | |
2253 | ||
2254 | #ifdef SMC_USE_PXA_DMA | |
2255 | if (ndev->dma != (unsigned char)-1) | |
2256 | pxa_free_dma(ndev->dma); | |
2257 | #endif | |
2258 | iounmap(lp->base); | |
2259 | ||
2260 | smc_release_datacs(pdev,ndev); | |
2261 | smc_release_attrib(pdev); | |
2262 | ||
2263 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs"); | |
2264 | if (!res) | |
2265 | platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2266 | release_mem_region(res->start, SMC_IO_EXTENT); | |
2267 | ||
2268 | free_netdev(ndev); | |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
3ae5eaec | 2273 | static int smc_drv_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 2274 | { |
3ae5eaec | 2275 | struct net_device *ndev = platform_get_drvdata(dev); |
1da177e4 | 2276 | |
9480e307 | 2277 | if (ndev) { |
1da177e4 LT |
2278 | if (netif_running(ndev)) { |
2279 | netif_device_detach(ndev); | |
2280 | smc_shutdown(ndev); | |
2281 | smc_phy_powerdown(ndev); | |
2282 | } | |
2283 | } | |
2284 | return 0; | |
2285 | } | |
2286 | ||
3ae5eaec | 2287 | static int smc_drv_resume(struct platform_device *dev) |
1da177e4 | 2288 | { |
3ae5eaec | 2289 | struct net_device *ndev = platform_get_drvdata(dev); |
1da177e4 | 2290 | |
9480e307 | 2291 | if (ndev) { |
1da177e4 | 2292 | struct smc_local *lp = netdev_priv(ndev); |
3ae5eaec | 2293 | smc_enable_device(dev); |
1da177e4 LT |
2294 | if (netif_running(ndev)) { |
2295 | smc_reset(ndev); | |
2296 | smc_enable(ndev); | |
2297 | if (lp->phy_type != 0) | |
6d5aefb8 | 2298 | smc_phy_configure(&lp->phy_configure); |
1da177e4 LT |
2299 | netif_device_attach(ndev); |
2300 | } | |
2301 | } | |
2302 | return 0; | |
2303 | } | |
2304 | ||
3ae5eaec | 2305 | static struct platform_driver smc_driver = { |
1da177e4 LT |
2306 | .probe = smc_drv_probe, |
2307 | .remove = smc_drv_remove, | |
2308 | .suspend = smc_drv_suspend, | |
2309 | .resume = smc_drv_resume, | |
3ae5eaec RK |
2310 | .driver = { |
2311 | .name = CARDNAME, | |
72abb461 | 2312 | .owner = THIS_MODULE, |
3ae5eaec | 2313 | }, |
1da177e4 LT |
2314 | }; |
2315 | ||
2316 | static int __init smc_init(void) | |
2317 | { | |
2318 | #ifdef MODULE | |
2319 | #ifdef CONFIG_ISA | |
2320 | if (io == -1) | |
6aa20a22 | 2321 | printk(KERN_WARNING |
1da177e4 LT |
2322 | "%s: You shouldn't use auto-probing with insmod!\n", |
2323 | CARDNAME); | |
2324 | #endif | |
2325 | #endif | |
2326 | ||
3ae5eaec | 2327 | return platform_driver_register(&smc_driver); |
1da177e4 LT |
2328 | } |
2329 | ||
2330 | static void __exit smc_cleanup(void) | |
2331 | { | |
3ae5eaec | 2332 | platform_driver_unregister(&smc_driver); |
1da177e4 LT |
2333 | } |
2334 | ||
2335 | module_init(smc_init); | |
2336 | module_exit(smc_cleanup); |