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099dc4fb DS |
1 | /* |
2 | * IPWireless 3G PCMCIA Network Driver | |
3 | * | |
4 | * Original code | |
5 | * by Stephen Blackheath <stephen@blacksapphire.com>, | |
6 | * Ben Martel <benm@symmetric.co.nz> | |
7 | * | |
8 | * Copyrighted as follows: | |
9 | * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) | |
10 | * | |
11 | * Various driver changes and rewrites, port to new kernels | |
12 | * Copyright (C) 2006-2007 Jiri Kosina | |
13 | * | |
14 | * Misc code cleanups and updates | |
15 | * Copyright (C) 2007 David Sterba | |
16 | */ | |
17 | ||
18 | #include <linux/interrupt.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/irq.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/list.h> | |
23 | #include <linux/slab.h> | |
24 | ||
25 | #include "hardware.h" | |
26 | #include "setup_protocol.h" | |
27 | #include "network.h" | |
28 | #include "main.h" | |
29 | ||
30 | static void ipw_send_setup_packet(struct ipw_hardware *hw); | |
31 | static void handle_received_SETUP_packet(struct ipw_hardware *ipw, | |
32 | unsigned int address, | |
ff3e990e | 33 | const unsigned char *data, int len, |
099dc4fb DS |
34 | int is_last); |
35 | static void ipwireless_setup_timer(unsigned long data); | |
36 | static void handle_received_CTRL_packet(struct ipw_hardware *hw, | |
ff3e990e | 37 | unsigned int channel_idx, const unsigned char *data, int len); |
099dc4fb DS |
38 | |
39 | /*#define TIMING_DIAGNOSTICS*/ | |
40 | ||
41 | #ifdef TIMING_DIAGNOSTICS | |
42 | ||
43 | static struct timing_stats { | |
44 | unsigned long last_report_time; | |
45 | unsigned long read_time; | |
46 | unsigned long write_time; | |
47 | unsigned long read_bytes; | |
48 | unsigned long write_bytes; | |
49 | unsigned long start_time; | |
50 | }; | |
51 | ||
52 | static void start_timing(void) | |
53 | { | |
54 | timing_stats.start_time = jiffies; | |
55 | } | |
56 | ||
57 | static void end_read_timing(unsigned length) | |
58 | { | |
59 | timing_stats.read_time += (jiffies - start_time); | |
60 | timing_stats.read_bytes += length + 2; | |
61 | report_timing(); | |
62 | } | |
63 | ||
64 | static void end_write_timing(unsigned length) | |
65 | { | |
66 | timing_stats.write_time += (jiffies - start_time); | |
67 | timing_stats.write_bytes += length + 2; | |
68 | report_timing(); | |
69 | } | |
70 | ||
71 | static void report_timing(void) | |
72 | { | |
73 | unsigned long since = jiffies - timing_stats.last_report_time; | |
74 | ||
75 | /* If it's been more than one second... */ | |
76 | if (since >= HZ) { | |
77 | int first = (timing_stats.last_report_time == 0); | |
78 | ||
79 | timing_stats.last_report_time = jiffies; | |
80 | if (!first) | |
81 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 82 | ": %u us elapsed - read %lu bytes in %u us, wrote %lu bytes in %u us\n", |
099dc4fb DS |
83 | jiffies_to_usecs(since), |
84 | timing_stats.read_bytes, | |
85 | jiffies_to_usecs(timing_stats.read_time), | |
86 | timing_stats.write_bytes, | |
87 | jiffies_to_usecs(timing_stats.write_time)); | |
88 | ||
89 | timing_stats.read_time = 0; | |
90 | timing_stats.write_time = 0; | |
91 | timing_stats.read_bytes = 0; | |
92 | timing_stats.write_bytes = 0; | |
93 | } | |
94 | } | |
95 | #else | |
96 | static void start_timing(void) { } | |
97 | static void end_read_timing(unsigned length) { } | |
98 | static void end_write_timing(unsigned length) { } | |
99 | #endif | |
100 | ||
101 | /* Imported IPW definitions */ | |
102 | ||
103 | #define LL_MTU_V1 318 | |
104 | #define LL_MTU_V2 250 | |
105 | #define LL_MTU_MAX (LL_MTU_V1 > LL_MTU_V2 ? LL_MTU_V1 : LL_MTU_V2) | |
106 | ||
107 | #define PRIO_DATA 2 | |
108 | #define PRIO_CTRL 1 | |
109 | #define PRIO_SETUP 0 | |
110 | ||
111 | /* Addresses */ | |
112 | #define ADDR_SETUP_PROT 0 | |
113 | ||
114 | /* Protocol ids */ | |
115 | enum { | |
116 | /* Identifier for the Com Data protocol */ | |
117 | TL_PROTOCOLID_COM_DATA = 0, | |
118 | ||
119 | /* Identifier for the Com Control protocol */ | |
120 | TL_PROTOCOLID_COM_CTRL = 1, | |
121 | ||
122 | /* Identifier for the Setup protocol */ | |
123 | TL_PROTOCOLID_SETUP = 2 | |
124 | }; | |
125 | ||
126 | /* Number of bytes in NL packet header (cannot do | |
127 | * sizeof(nl_packet_header) since it's a bitfield) */ | |
128 | #define NL_FIRST_PACKET_HEADER_SIZE 3 | |
129 | ||
130 | /* Number of bytes in NL packet header (cannot do | |
131 | * sizeof(nl_packet_header) since it's a bitfield) */ | |
132 | #define NL_FOLLOWING_PACKET_HEADER_SIZE 1 | |
133 | ||
134 | struct nl_first_packet_header { | |
099dc4fb DS |
135 | unsigned char protocol:3; |
136 | unsigned char address:3; | |
137 | unsigned char packet_rank:2; | |
099dc4fb DS |
138 | unsigned char length_lsb; |
139 | unsigned char length_msb; | |
140 | }; | |
141 | ||
142 | struct nl_packet_header { | |
099dc4fb DS |
143 | unsigned char protocol:3; |
144 | unsigned char address:3; | |
145 | unsigned char packet_rank:2; | |
099dc4fb DS |
146 | }; |
147 | ||
148 | /* Value of 'packet_rank' above */ | |
149 | #define NL_INTERMEDIATE_PACKET 0x0 | |
150 | #define NL_LAST_PACKET 0x1 | |
151 | #define NL_FIRST_PACKET 0x2 | |
152 | ||
153 | union nl_packet { | |
154 | /* Network packet header of the first packet (a special case) */ | |
155 | struct nl_first_packet_header hdr_first; | |
156 | /* Network packet header of the following packets (if any) */ | |
157 | struct nl_packet_header hdr; | |
158 | /* Complete network packet (header + data) */ | |
159 | unsigned char rawpkt[LL_MTU_MAX]; | |
160 | } __attribute__ ((__packed__)); | |
161 | ||
162 | #define HW_VERSION_UNKNOWN -1 | |
163 | #define HW_VERSION_1 1 | |
164 | #define HW_VERSION_2 2 | |
165 | ||
166 | /* IPW I/O ports */ | |
167 | #define IOIER 0x00 /* Interrupt Enable Register */ | |
168 | #define IOIR 0x02 /* Interrupt Source/ACK register */ | |
169 | #define IODCR 0x04 /* Data Control Register */ | |
170 | #define IODRR 0x06 /* Data Read Register */ | |
171 | #define IODWR 0x08 /* Data Write Register */ | |
172 | #define IOESR 0x0A /* Embedded Driver Status Register */ | |
173 | #define IORXR 0x0C /* Rx Fifo Register (Host to Embedded) */ | |
174 | #define IOTXR 0x0E /* Tx Fifo Register (Embedded to Host) */ | |
175 | ||
176 | /* I/O ports and bit definitions for version 1 of the hardware */ | |
177 | ||
178 | /* IER bits*/ | |
179 | #define IER_RXENABLED 0x1 | |
180 | #define IER_TXENABLED 0x2 | |
181 | ||
182 | /* ISR bits */ | |
183 | #define IR_RXINTR 0x1 | |
184 | #define IR_TXINTR 0x2 | |
185 | ||
186 | /* DCR bits */ | |
187 | #define DCR_RXDONE 0x1 | |
188 | #define DCR_TXDONE 0x2 | |
189 | #define DCR_RXRESET 0x4 | |
190 | #define DCR_TXRESET 0x8 | |
191 | ||
192 | /* I/O ports and bit definitions for version 2 of the hardware */ | |
193 | ||
194 | struct MEMCCR { | |
195 | unsigned short reg_config_option; /* PCCOR: Configuration Option Register */ | |
196 | unsigned short reg_config_and_status; /* PCCSR: Configuration and Status Register */ | |
197 | unsigned short reg_pin_replacement; /* PCPRR: Pin Replacemant Register */ | |
198 | unsigned short reg_socket_and_copy; /* PCSCR: Socket and Copy Register */ | |
199 | unsigned short reg_ext_status; /* PCESR: Extendend Status Register */ | |
200 | unsigned short reg_io_base; /* PCIOB: I/O Base Register */ | |
201 | }; | |
202 | ||
203 | struct MEMINFREG { | |
204 | unsigned short memreg_tx_old; /* TX Register (R/W) */ | |
205 | unsigned short pad1; | |
206 | unsigned short memreg_rx_done; /* RXDone Register (R/W) */ | |
207 | unsigned short pad2; | |
208 | unsigned short memreg_rx; /* RX Register (R/W) */ | |
209 | unsigned short pad3; | |
210 | unsigned short memreg_pc_interrupt_ack; /* PC intr Ack Register (W) */ | |
211 | unsigned short pad4; | |
212 | unsigned long memreg_card_present;/* Mask for Host to check (R) for | |
213 | * CARD_PRESENT_VALUE */ | |
214 | unsigned short memreg_tx_new; /* TX2 (new) Register (R/W) */ | |
215 | }; | |
216 | ||
099dc4fb DS |
217 | #define CARD_PRESENT_VALUE (0xBEEFCAFEUL) |
218 | ||
219 | #define MEMTX_TX 0x0001 | |
220 | #define MEMRX_RX 0x0001 | |
221 | #define MEMRX_RX_DONE 0x0001 | |
222 | #define MEMRX_PCINTACKK 0x0001 | |
099dc4fb DS |
223 | |
224 | #define NL_NUM_OF_PRIORITIES 3 | |
225 | #define NL_NUM_OF_PROTOCOLS 3 | |
226 | #define NL_NUM_OF_ADDRESSES NO_OF_IPW_CHANNELS | |
227 | ||
228 | struct ipw_hardware { | |
229 | unsigned int base_port; | |
230 | short hw_version; | |
231 | unsigned short ll_mtu; | |
63c4dbd1 | 232 | spinlock_t lock; |
099dc4fb DS |
233 | |
234 | int initializing; | |
235 | int init_loops; | |
236 | struct timer_list setup_timer; | |
237 | ||
eb4e545d | 238 | /* Flag if hw is ready to send next packet */ |
099dc4fb | 239 | int tx_ready; |
eb4e545d | 240 | /* Count of pending packets to be sent */ |
099dc4fb | 241 | int tx_queued; |
eb4e545d | 242 | struct list_head tx_queue[NL_NUM_OF_PRIORITIES]; |
099dc4fb DS |
243 | |
244 | int rx_bytes_queued; | |
245 | struct list_head rx_queue; | |
246 | /* Pool of rx_packet structures that are not currently used. */ | |
247 | struct list_head rx_pool; | |
248 | int rx_pool_size; | |
249 | /* True if reception of data is blocked while userspace processes it. */ | |
250 | int blocking_rx; | |
251 | /* True if there is RX data ready on the hardware. */ | |
252 | int rx_ready; | |
253 | unsigned short last_memtx_serial; | |
254 | /* | |
255 | * Newer versions of the V2 card firmware send serial numbers in the | |
256 | * MemTX register. 'serial_number_detected' is set true when we detect | |
257 | * a non-zero serial number (indicating the new firmware). Thereafter, | |
258 | * the driver can safely ignore the Timer Recovery re-sends to avoid | |
259 | * out-of-sync problems. | |
260 | */ | |
261 | int serial_number_detected; | |
262 | struct work_struct work_rx; | |
263 | ||
264 | /* True if we are to send the set-up data to the hardware. */ | |
265 | int to_setup; | |
266 | ||
267 | /* Card has been removed */ | |
268 | int removed; | |
269 | /* Saved irq value when we disable the interrupt. */ | |
270 | int irq; | |
271 | /* True if this driver is shutting down. */ | |
272 | int shutting_down; | |
273 | /* Modem control lines */ | |
274 | unsigned int control_lines[NL_NUM_OF_ADDRESSES]; | |
275 | struct ipw_rx_packet *packet_assembler[NL_NUM_OF_ADDRESSES]; | |
276 | ||
277 | struct tasklet_struct tasklet; | |
278 | ||
279 | /* The handle for the network layer, for the sending of events to it. */ | |
280 | struct ipw_network *network; | |
281 | struct MEMINFREG __iomem *memory_info_regs; | |
282 | struct MEMCCR __iomem *memregs_CCR; | |
283 | void (*reboot_callback) (void *data); | |
284 | void *reboot_callback_data; | |
285 | ||
286 | unsigned short __iomem *memreg_tx; | |
287 | }; | |
288 | ||
289 | /* | |
290 | * Packet info structure for tx packets. | |
291 | * Note: not all the fields defined here are required for all protocols | |
292 | */ | |
293 | struct ipw_tx_packet { | |
294 | struct list_head queue; | |
295 | /* channel idx + 1 */ | |
296 | unsigned char dest_addr; | |
297 | /* SETUP, CTRL or DATA */ | |
298 | unsigned char protocol; | |
299 | /* Length of data block, which starts at the end of this structure */ | |
300 | unsigned short length; | |
301 | /* Sending state */ | |
302 | /* Offset of where we've sent up to so far */ | |
303 | unsigned long offset; | |
304 | /* Count of packet fragments, starting at 0 */ | |
305 | int fragment_count; | |
306 | ||
307 | /* Called after packet is sent and before is freed */ | |
308 | void (*packet_callback) (void *cb_data, unsigned int packet_length); | |
309 | void *callback_data; | |
310 | }; | |
311 | ||
312 | /* Signals from DTE */ | |
313 | #define COMCTRL_RTS 0 | |
314 | #define COMCTRL_DTR 1 | |
315 | ||
316 | /* Signals from DCE */ | |
317 | #define COMCTRL_CTS 2 | |
318 | #define COMCTRL_DCD 3 | |
319 | #define COMCTRL_DSR 4 | |
320 | #define COMCTRL_RI 5 | |
321 | ||
322 | struct ipw_control_packet_body { | |
323 | /* DTE signal or DCE signal */ | |
324 | unsigned char sig_no; | |
325 | /* 0: set signal, 1: clear signal */ | |
326 | unsigned char value; | |
327 | } __attribute__ ((__packed__)); | |
328 | ||
329 | struct ipw_control_packet { | |
330 | struct ipw_tx_packet header; | |
331 | struct ipw_control_packet_body body; | |
332 | }; | |
333 | ||
334 | struct ipw_rx_packet { | |
335 | struct list_head queue; | |
336 | unsigned int capacity; | |
337 | unsigned int length; | |
338 | unsigned int protocol; | |
339 | unsigned int channel_idx; | |
340 | }; | |
341 | ||
099dc4fb DS |
342 | static char *data_type(const unsigned char *buf, unsigned length) |
343 | { | |
344 | struct nl_packet_header *hdr = (struct nl_packet_header *) buf; | |
345 | ||
346 | if (length == 0) | |
347 | return " "; | |
348 | ||
349 | if (hdr->packet_rank & NL_FIRST_PACKET) { | |
350 | switch (hdr->protocol) { | |
351 | case TL_PROTOCOLID_COM_DATA: return "DATA "; | |
352 | case TL_PROTOCOLID_COM_CTRL: return "CTRL "; | |
353 | case TL_PROTOCOLID_SETUP: return "SETUP"; | |
354 | default: return "???? "; | |
355 | } | |
356 | } else | |
357 | return " "; | |
358 | } | |
359 | ||
360 | #define DUMP_MAX_BYTES 64 | |
361 | ||
362 | static void dump_data_bytes(const char *type, const unsigned char *data, | |
363 | unsigned length) | |
364 | { | |
365 | char prefix[56]; | |
366 | ||
367 | sprintf(prefix, IPWIRELESS_PCCARD_NAME ": %s %s ", | |
368 | type, data_type(data, length)); | |
369 | print_hex_dump_bytes(prefix, 0, (void *)data, | |
370 | length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES); | |
371 | } | |
372 | ||
d54c2752 DS |
373 | static void swap_packet_bitfield_to_le(unsigned char *data) |
374 | { | |
375 | #ifdef __BIG_ENDIAN_BITFIELD | |
376 | unsigned char tmp = *data, ret = 0; | |
377 | ||
378 | /* | |
379 | * transform bits from aa.bbb.ccc to ccc.bbb.aa | |
380 | */ | |
7e041abf JP |
381 | ret |= (tmp & 0xc0) >> 6; |
382 | ret |= (tmp & 0x38) >> 1; | |
383 | ret |= (tmp & 0x07) << 5; | |
d54c2752 DS |
384 | *data = ret & 0xff; |
385 | #endif | |
386 | } | |
387 | ||
388 | static void swap_packet_bitfield_from_le(unsigned char *data) | |
389 | { | |
390 | #ifdef __BIG_ENDIAN_BITFIELD | |
391 | unsigned char tmp = *data, ret = 0; | |
392 | ||
393 | /* | |
394 | * transform bits from ccc.bbb.aa to aa.bbb.ccc | |
395 | */ | |
7e041abf JP |
396 | ret |= (tmp & 0xe0) >> 5; |
397 | ret |= (tmp & 0x1c) << 1; | |
398 | ret |= (tmp & 0x03) << 6; | |
d54c2752 DS |
399 | *data = ret & 0xff; |
400 | #endif | |
401 | } | |
402 | ||
93110f69 | 403 | static void do_send_fragment(struct ipw_hardware *hw, unsigned char *data, |
099dc4fb DS |
404 | unsigned length) |
405 | { | |
d4c0deb7 | 406 | unsigned i; |
099dc4fb DS |
407 | unsigned long flags; |
408 | ||
409 | start_timing(); | |
93110f69 | 410 | BUG_ON(length > hw->ll_mtu); |
099dc4fb DS |
411 | |
412 | if (ipwireless_debug) | |
413 | dump_data_bytes("send", data, length); | |
414 | ||
63c4dbd1 | 415 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 416 | |
eb4e545d | 417 | hw->tx_ready = 0; |
d54c2752 | 418 | swap_packet_bitfield_to_le(data); |
eb4e545d | 419 | |
099dc4fb DS |
420 | if (hw->hw_version == HW_VERSION_1) { |
421 | outw((unsigned short) length, hw->base_port + IODWR); | |
422 | ||
423 | for (i = 0; i < length; i += 2) { | |
424 | unsigned short d = data[i]; | |
425 | __le16 raw_data; | |
426 | ||
d4c0deb7 | 427 | if (i + 1 < length) |
099dc4fb DS |
428 | d |= data[i + 1] << 8; |
429 | raw_data = cpu_to_le16(d); | |
430 | outw(raw_data, hw->base_port + IODWR); | |
431 | } | |
432 | ||
433 | outw(DCR_TXDONE, hw->base_port + IODCR); | |
434 | } else if (hw->hw_version == HW_VERSION_2) { | |
2e713165 | 435 | outw((unsigned short) length, hw->base_port); |
099dc4fb DS |
436 | |
437 | for (i = 0; i < length; i += 2) { | |
438 | unsigned short d = data[i]; | |
439 | __le16 raw_data; | |
440 | ||
d4c0deb7 | 441 | if (i + 1 < length) |
099dc4fb DS |
442 | d |= data[i + 1] << 8; |
443 | raw_data = cpu_to_le16(d); | |
2e713165 | 444 | outw(raw_data, hw->base_port); |
099dc4fb DS |
445 | } |
446 | while ((i & 3) != 2) { | |
2e713165 | 447 | outw((unsigned short) 0xDEAD, hw->base_port); |
099dc4fb DS |
448 | i += 2; |
449 | } | |
450 | writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx); | |
451 | } | |
452 | ||
63c4dbd1 | 453 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
454 | |
455 | end_write_timing(length); | |
099dc4fb DS |
456 | } |
457 | ||
93110f69 | 458 | static void do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet) |
099dc4fb DS |
459 | { |
460 | unsigned short fragment_data_len; | |
461 | unsigned short data_left = packet->length - packet->offset; | |
462 | unsigned short header_size; | |
463 | union nl_packet pkt; | |
464 | ||
465 | header_size = | |
466 | (packet->fragment_count == 0) | |
467 | ? NL_FIRST_PACKET_HEADER_SIZE | |
468 | : NL_FOLLOWING_PACKET_HEADER_SIZE; | |
469 | fragment_data_len = hw->ll_mtu - header_size; | |
470 | if (data_left < fragment_data_len) | |
471 | fragment_data_len = data_left; | |
472 | ||
d54c2752 DS |
473 | /* |
474 | * hdr_first is now in machine bitfield order, which will be swapped | |
475 | * to le just before it goes to hw | |
476 | */ | |
099dc4fb DS |
477 | pkt.hdr_first.protocol = packet->protocol; |
478 | pkt.hdr_first.address = packet->dest_addr; | |
479 | pkt.hdr_first.packet_rank = 0; | |
480 | ||
481 | /* First packet? */ | |
482 | if (packet->fragment_count == 0) { | |
483 | pkt.hdr_first.packet_rank |= NL_FIRST_PACKET; | |
484 | pkt.hdr_first.length_lsb = (unsigned char) packet->length; | |
485 | pkt.hdr_first.length_msb = | |
486 | (unsigned char) (packet->length >> 8); | |
487 | } | |
488 | ||
489 | memcpy(pkt.rawpkt + header_size, | |
490 | ((unsigned char *) packet) + sizeof(struct ipw_tx_packet) + | |
491 | packet->offset, fragment_data_len); | |
492 | packet->offset += fragment_data_len; | |
493 | packet->fragment_count++; | |
494 | ||
495 | /* Last packet? (May also be first packet.) */ | |
496 | if (packet->offset == packet->length) | |
497 | pkt.hdr_first.packet_rank |= NL_LAST_PACKET; | |
498 | do_send_fragment(hw, pkt.rawpkt, header_size + fragment_data_len); | |
499 | ||
500 | /* If this packet has unsent data, then re-queue it. */ | |
501 | if (packet->offset < packet->length) { | |
502 | /* | |
503 | * Re-queue it at the head of the highest priority queue so | |
504 | * it goes before all other packets | |
505 | */ | |
506 | unsigned long flags; | |
507 | ||
63c4dbd1 | 508 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 509 | list_add(&packet->queue, &hw->tx_queue[0]); |
eb4e545d | 510 | hw->tx_queued++; |
63c4dbd1 | 511 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
512 | } else { |
513 | if (packet->packet_callback) | |
514 | packet->packet_callback(packet->callback_data, | |
515 | packet->length); | |
516 | kfree(packet); | |
517 | } | |
099dc4fb DS |
518 | } |
519 | ||
520 | static void ipw_setup_hardware(struct ipw_hardware *hw) | |
521 | { | |
522 | unsigned long flags; | |
523 | ||
63c4dbd1 | 524 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
525 | if (hw->hw_version == HW_VERSION_1) { |
526 | /* Reset RX FIFO */ | |
527 | outw(DCR_RXRESET, hw->base_port + IODCR); | |
528 | /* SB: Reset TX FIFO */ | |
529 | outw(DCR_TXRESET, hw->base_port + IODCR); | |
530 | ||
531 | /* Enable TX and RX interrupts. */ | |
532 | outw(IER_TXENABLED | IER_RXENABLED, hw->base_port + IOIER); | |
533 | } else { | |
534 | /* | |
535 | * Set INTRACK bit (bit 0), which means we must explicitly | |
536 | * acknowledge interrupts by clearing bit 2 of reg_config_and_status. | |
537 | */ | |
538 | unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); | |
539 | ||
540 | csr |= 1; | |
541 | writew(csr, &hw->memregs_CCR->reg_config_and_status); | |
542 | } | |
63c4dbd1 | 543 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
544 | } |
545 | ||
546 | /* | |
547 | * If 'packet' is NULL, then this function allocates a new packet, setting its | |
548 | * length to 0 and ensuring it has the specified minimum amount of free space. | |
549 | * | |
550 | * If 'packet' is not NULL, then this function enlarges it if it doesn't | |
551 | * have the specified minimum amount of free space. | |
552 | * | |
553 | */ | |
554 | static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw, | |
555 | struct ipw_rx_packet *packet, | |
556 | int minimum_free_space) | |
557 | { | |
558 | ||
559 | if (!packet) { | |
560 | unsigned long flags; | |
561 | ||
63c4dbd1 | 562 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
563 | if (!list_empty(&hw->rx_pool)) { |
564 | packet = list_first_entry(&hw->rx_pool, | |
565 | struct ipw_rx_packet, queue); | |
099dc4fb | 566 | hw->rx_pool_size--; |
63c4dbd1 | 567 | spin_unlock_irqrestore(&hw->lock, flags); |
0f38c47a | 568 | list_del(&packet->queue); |
099dc4fb | 569 | } else { |
a0138692 | 570 | const int min_capacity = |
3684a601 | 571 | ipwireless_ppp_mru(hw->network) + 2; |
099dc4fb DS |
572 | int new_capacity; |
573 | ||
63c4dbd1 | 574 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb | 575 | new_capacity = |
d4c0deb7 DS |
576 | (minimum_free_space > min_capacity |
577 | ? minimum_free_space | |
578 | : min_capacity); | |
099dc4fb DS |
579 | packet = kmalloc(sizeof(struct ipw_rx_packet) |
580 | + new_capacity, GFP_ATOMIC); | |
581 | if (!packet) | |
582 | return NULL; | |
583 | packet->capacity = new_capacity; | |
584 | } | |
585 | packet->length = 0; | |
586 | } | |
587 | ||
099dc4fb DS |
588 | if (packet->length + minimum_free_space > packet->capacity) { |
589 | struct ipw_rx_packet *old_packet = packet; | |
590 | ||
591 | packet = kmalloc(sizeof(struct ipw_rx_packet) + | |
592 | old_packet->length + minimum_free_space, | |
593 | GFP_ATOMIC); | |
43f77e91 DJ |
594 | if (!packet) { |
595 | kfree(old_packet); | |
099dc4fb | 596 | return NULL; |
43f77e91 | 597 | } |
099dc4fb DS |
598 | memcpy(packet, old_packet, |
599 | sizeof(struct ipw_rx_packet) | |
600 | + old_packet->length); | |
601 | packet->capacity = old_packet->length + minimum_free_space; | |
602 | kfree(old_packet); | |
603 | } | |
604 | ||
605 | return packet; | |
606 | } | |
607 | ||
608 | static void pool_free(struct ipw_hardware *hw, struct ipw_rx_packet *packet) | |
609 | { | |
610 | if (hw->rx_pool_size > 6) | |
611 | kfree(packet); | |
612 | else { | |
613 | hw->rx_pool_size++; | |
0f38c47a | 614 | list_add(&packet->queue, &hw->rx_pool); |
099dc4fb DS |
615 | } |
616 | } | |
617 | ||
618 | static void queue_received_packet(struct ipw_hardware *hw, | |
ff3e990e DS |
619 | unsigned int protocol, |
620 | unsigned int address, | |
621 | const unsigned char *data, int length, | |
622 | int is_last) | |
099dc4fb DS |
623 | { |
624 | unsigned int channel_idx = address - 1; | |
625 | struct ipw_rx_packet *packet = NULL; | |
626 | unsigned long flags; | |
627 | ||
628 | /* Discard packet if channel index is out of range. */ | |
629 | if (channel_idx >= NL_NUM_OF_ADDRESSES) { | |
630 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
631 | ": data packet has bad address %u\n", address); | |
632 | return; | |
633 | } | |
634 | ||
635 | /* | |
636 | * ->packet_assembler is safe to touch unlocked, this is the only place | |
637 | */ | |
638 | if (protocol == TL_PROTOCOLID_COM_DATA) { | |
639 | struct ipw_rx_packet **assem = | |
640 | &hw->packet_assembler[channel_idx]; | |
641 | ||
642 | /* | |
643 | * Create a new packet, or assembler already contains one | |
644 | * enlarge it by 'length' bytes. | |
645 | */ | |
646 | (*assem) = pool_allocate(hw, *assem, length); | |
647 | if (!(*assem)) { | |
648 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
d82603c6 | 649 | ": no memory for incoming data packet, dropped!\n"); |
099dc4fb DS |
650 | return; |
651 | } | |
652 | (*assem)->protocol = protocol; | |
653 | (*assem)->channel_idx = channel_idx; | |
654 | ||
655 | /* Append this packet data onto existing data. */ | |
656 | memcpy((unsigned char *)(*assem) + | |
657 | sizeof(struct ipw_rx_packet) | |
658 | + (*assem)->length, data, length); | |
659 | (*assem)->length += length; | |
660 | if (is_last) { | |
661 | packet = *assem; | |
662 | *assem = NULL; | |
663 | /* Count queued DATA bytes only */ | |
63c4dbd1 | 664 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 665 | hw->rx_bytes_queued += packet->length; |
63c4dbd1 | 666 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
667 | } |
668 | } else { | |
669 | /* If it's a CTRL packet, don't assemble, just queue it. */ | |
670 | packet = pool_allocate(hw, NULL, length); | |
671 | if (!packet) { | |
672 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
d82603c6 | 673 | ": no memory for incoming ctrl packet, dropped!\n"); |
099dc4fb DS |
674 | return; |
675 | } | |
676 | packet->protocol = protocol; | |
677 | packet->channel_idx = channel_idx; | |
678 | memcpy((unsigned char *)packet + sizeof(struct ipw_rx_packet), | |
679 | data, length); | |
680 | packet->length = length; | |
681 | } | |
682 | ||
683 | /* | |
684 | * If this is the last packet, then send the assembled packet on to the | |
685 | * network layer. | |
686 | */ | |
687 | if (packet) { | |
63c4dbd1 | 688 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
689 | list_add_tail(&packet->queue, &hw->rx_queue); |
690 | /* Block reception of incoming packets if queue is full. */ | |
691 | hw->blocking_rx = | |
d4c0deb7 | 692 | (hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE); |
099dc4fb | 693 | |
63c4dbd1 | 694 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
695 | schedule_work(&hw->work_rx); |
696 | } | |
697 | } | |
698 | ||
699 | /* | |
700 | * Workqueue callback | |
701 | */ | |
702 | static void ipw_receive_data_work(struct work_struct *work_rx) | |
703 | { | |
704 | struct ipw_hardware *hw = | |
705 | container_of(work_rx, struct ipw_hardware, work_rx); | |
706 | unsigned long flags; | |
707 | ||
63c4dbd1 | 708 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
709 | while (!list_empty(&hw->rx_queue)) { |
710 | struct ipw_rx_packet *packet = | |
711 | list_first_entry(&hw->rx_queue, | |
712 | struct ipw_rx_packet, queue); | |
713 | ||
714 | if (hw->shutting_down) | |
715 | break; | |
716 | list_del(&packet->queue); | |
717 | ||
718 | /* | |
719 | * Note: ipwireless_network_packet_received must be called in a | |
720 | * process context (i.e. via schedule_work) because the tty | |
721 | * output code can sleep in the tty_flip_buffer_push call. | |
722 | */ | |
723 | if (packet->protocol == TL_PROTOCOLID_COM_DATA) { | |
724 | if (hw->network != NULL) { | |
725 | /* If the network hasn't been disconnected. */ | |
63c4dbd1 | 726 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
727 | /* |
728 | * This must run unlocked due to tty processing | |
729 | * and mutex locking | |
730 | */ | |
731 | ipwireless_network_packet_received( | |
732 | hw->network, | |
733 | packet->channel_idx, | |
734 | (unsigned char *)packet | |
735 | + sizeof(struct ipw_rx_packet), | |
736 | packet->length); | |
63c4dbd1 | 737 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
738 | } |
739 | /* Count queued DATA bytes only */ | |
740 | hw->rx_bytes_queued -= packet->length; | |
741 | } else { | |
742 | /* | |
743 | * This is safe to be called locked, callchain does | |
744 | * not block | |
745 | */ | |
746 | handle_received_CTRL_packet(hw, packet->channel_idx, | |
747 | (unsigned char *)packet | |
748 | + sizeof(struct ipw_rx_packet), | |
749 | packet->length); | |
750 | } | |
751 | pool_free(hw, packet); | |
752 | /* | |
753 | * Unblock reception of incoming packets if queue is no longer | |
754 | * full. | |
755 | */ | |
756 | hw->blocking_rx = | |
757 | hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE; | |
758 | if (hw->shutting_down) | |
759 | break; | |
760 | } | |
63c4dbd1 | 761 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
762 | } |
763 | ||
764 | static void handle_received_CTRL_packet(struct ipw_hardware *hw, | |
765 | unsigned int channel_idx, | |
ff3e990e | 766 | const unsigned char *data, int len) |
099dc4fb | 767 | { |
ff3e990e DS |
768 | const struct ipw_control_packet_body *body = |
769 | (const struct ipw_control_packet_body *) data; | |
099dc4fb DS |
770 | unsigned int changed_mask; |
771 | ||
772 | if (len != sizeof(struct ipw_control_packet_body)) { | |
773 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
774 | ": control packet was %d bytes - wrong size!\n", | |
775 | len); | |
776 | return; | |
777 | } | |
778 | ||
779 | switch (body->sig_no) { | |
780 | case COMCTRL_CTS: | |
781 | changed_mask = IPW_CONTROL_LINE_CTS; | |
782 | break; | |
783 | case COMCTRL_DCD: | |
784 | changed_mask = IPW_CONTROL_LINE_DCD; | |
785 | break; | |
786 | case COMCTRL_DSR: | |
787 | changed_mask = IPW_CONTROL_LINE_DSR; | |
788 | break; | |
789 | case COMCTRL_RI: | |
790 | changed_mask = IPW_CONTROL_LINE_RI; | |
791 | break; | |
792 | default: | |
793 | changed_mask = 0; | |
794 | } | |
795 | ||
796 | if (changed_mask != 0) { | |
797 | if (body->value) | |
798 | hw->control_lines[channel_idx] |= changed_mask; | |
799 | else | |
800 | hw->control_lines[channel_idx] &= ~changed_mask; | |
801 | if (hw->network) | |
802 | ipwireless_network_notify_control_line_change( | |
803 | hw->network, | |
804 | channel_idx, | |
805 | hw->control_lines[channel_idx], | |
806 | changed_mask); | |
807 | } | |
808 | } | |
809 | ||
810 | static void handle_received_packet(struct ipw_hardware *hw, | |
ff3e990e | 811 | const union nl_packet *packet, |
099dc4fb DS |
812 | unsigned short len) |
813 | { | |
814 | unsigned int protocol = packet->hdr.protocol; | |
815 | unsigned int address = packet->hdr.address; | |
816 | unsigned int header_length; | |
ff3e990e | 817 | const unsigned char *data; |
099dc4fb DS |
818 | unsigned int data_len; |
819 | int is_last = packet->hdr.packet_rank & NL_LAST_PACKET; | |
820 | ||
821 | if (packet->hdr.packet_rank & NL_FIRST_PACKET) | |
822 | header_length = NL_FIRST_PACKET_HEADER_SIZE; | |
823 | else | |
824 | header_length = NL_FOLLOWING_PACKET_HEADER_SIZE; | |
825 | ||
826 | data = packet->rawpkt + header_length; | |
827 | data_len = len - header_length; | |
828 | switch (protocol) { | |
829 | case TL_PROTOCOLID_COM_DATA: | |
830 | case TL_PROTOCOLID_COM_CTRL: | |
831 | queue_received_packet(hw, protocol, address, data, data_len, | |
832 | is_last); | |
833 | break; | |
834 | case TL_PROTOCOLID_SETUP: | |
835 | handle_received_SETUP_packet(hw, address, data, data_len, | |
836 | is_last); | |
837 | break; | |
838 | } | |
839 | } | |
840 | ||
841 | static void acknowledge_data_read(struct ipw_hardware *hw) | |
842 | { | |
843 | if (hw->hw_version == HW_VERSION_1) | |
844 | outw(DCR_RXDONE, hw->base_port + IODCR); | |
845 | else | |
846 | writew(MEMRX_PCINTACKK, | |
847 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
848 | } | |
849 | ||
850 | /* | |
851 | * Retrieve a packet from the IPW hardware. | |
852 | */ | |
853 | static void do_receive_packet(struct ipw_hardware *hw) | |
854 | { | |
855 | unsigned len; | |
d4c0deb7 | 856 | unsigned i; |
099dc4fb DS |
857 | unsigned char pkt[LL_MTU_MAX]; |
858 | ||
859 | start_timing(); | |
860 | ||
861 | if (hw->hw_version == HW_VERSION_1) { | |
862 | len = inw(hw->base_port + IODRR); | |
863 | if (len > hw->ll_mtu) { | |
864 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 865 | ": received a packet of %u bytes - longer than the MTU!\n", len); |
099dc4fb DS |
866 | outw(DCR_RXDONE | DCR_RXRESET, hw->base_port + IODCR); |
867 | return; | |
868 | } | |
869 | ||
870 | for (i = 0; i < len; i += 2) { | |
871 | __le16 raw_data = inw(hw->base_port + IODRR); | |
872 | unsigned short data = le16_to_cpu(raw_data); | |
873 | ||
874 | pkt[i] = (unsigned char) data; | |
875 | pkt[i + 1] = (unsigned char) (data >> 8); | |
876 | } | |
877 | } else { | |
2e713165 | 878 | len = inw(hw->base_port); |
099dc4fb DS |
879 | if (len > hw->ll_mtu) { |
880 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 881 | ": received a packet of %u bytes - longer than the MTU!\n", len); |
099dc4fb DS |
882 | writew(MEMRX_PCINTACKK, |
883 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
884 | return; | |
885 | } | |
886 | ||
887 | for (i = 0; i < len; i += 2) { | |
2e713165 | 888 | __le16 raw_data = inw(hw->base_port); |
099dc4fb DS |
889 | unsigned short data = le16_to_cpu(raw_data); |
890 | ||
891 | pkt[i] = (unsigned char) data; | |
892 | pkt[i + 1] = (unsigned char) (data >> 8); | |
893 | } | |
894 | ||
895 | while ((i & 3) != 2) { | |
2e713165 | 896 | inw(hw->base_port); |
099dc4fb DS |
897 | i += 2; |
898 | } | |
899 | } | |
900 | ||
901 | acknowledge_data_read(hw); | |
902 | ||
d54c2752 DS |
903 | swap_packet_bitfield_from_le(pkt); |
904 | ||
099dc4fb DS |
905 | if (ipwireless_debug) |
906 | dump_data_bytes("recv", pkt, len); | |
907 | ||
908 | handle_received_packet(hw, (union nl_packet *) pkt, len); | |
909 | ||
910 | end_read_timing(len); | |
911 | } | |
912 | ||
913 | static int get_current_packet_priority(struct ipw_hardware *hw) | |
914 | { | |
915 | /* | |
916 | * If we're initializing, don't send anything of higher priority than | |
917 | * PRIO_SETUP. The network layer therefore need not care about | |
918 | * hardware initialization - any of its stuff will simply be queued | |
919 | * until setup is complete. | |
920 | */ | |
921 | return (hw->to_setup || hw->initializing | |
d4c0deb7 | 922 | ? PRIO_SETUP + 1 : NL_NUM_OF_PRIORITIES); |
099dc4fb DS |
923 | } |
924 | ||
925 | /* | |
926 | * return 1 if something has been received from hw | |
927 | */ | |
928 | static int get_packets_from_hw(struct ipw_hardware *hw) | |
929 | { | |
930 | int received = 0; | |
931 | unsigned long flags; | |
932 | ||
63c4dbd1 | 933 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
934 | while (hw->rx_ready && !hw->blocking_rx) { |
935 | received = 1; | |
936 | hw->rx_ready--; | |
63c4dbd1 | 937 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
938 | |
939 | do_receive_packet(hw); | |
940 | ||
63c4dbd1 | 941 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 942 | } |
63c4dbd1 | 943 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
944 | |
945 | return received; | |
946 | } | |
947 | ||
948 | /* | |
949 | * Send pending packet up to given priority, prioritize SETUP data until | |
950 | * hardware is fully setup. | |
951 | * | |
952 | * return 1 if more packets can be sent | |
953 | */ | |
954 | static int send_pending_packet(struct ipw_hardware *hw, int priority_limit) | |
955 | { | |
956 | int more_to_send = 0; | |
957 | unsigned long flags; | |
958 | ||
63c4dbd1 | 959 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 960 | if (hw->tx_queued && hw->tx_ready) { |
099dc4fb DS |
961 | int priority; |
962 | struct ipw_tx_packet *packet = NULL; | |
963 | ||
099dc4fb DS |
964 | /* Pick a packet */ |
965 | for (priority = 0; priority < priority_limit; priority++) { | |
966 | if (!list_empty(&hw->tx_queue[priority])) { | |
967 | packet = list_first_entry( | |
968 | &hw->tx_queue[priority], | |
969 | struct ipw_tx_packet, | |
970 | queue); | |
971 | ||
eb4e545d | 972 | hw->tx_queued--; |
099dc4fb DS |
973 | list_del(&packet->queue); |
974 | ||
975 | break; | |
976 | } | |
977 | } | |
978 | if (!packet) { | |
979 | hw->tx_queued = 0; | |
63c4dbd1 | 980 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
981 | return 0; |
982 | } | |
eb4e545d | 983 | |
63c4dbd1 | 984 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
985 | |
986 | /* Send */ | |
987 | do_send_packet(hw, packet); | |
988 | ||
989 | /* Check if more to send */ | |
63c4dbd1 | 990 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
991 | for (priority = 0; priority < priority_limit; priority++) |
992 | if (!list_empty(&hw->tx_queue[priority])) { | |
993 | more_to_send = 1; | |
994 | break; | |
995 | } | |
996 | ||
997 | if (!more_to_send) | |
998 | hw->tx_queued = 0; | |
999 | } | |
63c4dbd1 | 1000 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1001 | |
1002 | return more_to_send; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Send and receive all queued packets. | |
1007 | */ | |
1008 | static void ipwireless_do_tasklet(unsigned long hw_) | |
1009 | { | |
1010 | struct ipw_hardware *hw = (struct ipw_hardware *) hw_; | |
1011 | unsigned long flags; | |
1012 | ||
63c4dbd1 | 1013 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1014 | if (hw->shutting_down) { |
63c4dbd1 | 1015 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1016 | return; |
1017 | } | |
1018 | ||
1019 | if (hw->to_setup == 1) { | |
1020 | /* | |
1021 | * Initial setup data sent to hardware | |
1022 | */ | |
1023 | hw->to_setup = 2; | |
63c4dbd1 | 1024 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1025 | |
1026 | ipw_setup_hardware(hw); | |
1027 | ipw_send_setup_packet(hw); | |
1028 | ||
1029 | send_pending_packet(hw, PRIO_SETUP + 1); | |
1030 | get_packets_from_hw(hw); | |
1031 | } else { | |
1032 | int priority_limit = get_current_packet_priority(hw); | |
1033 | int again; | |
1034 | ||
63c4dbd1 | 1035 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1036 | |
1037 | do { | |
1038 | again = send_pending_packet(hw, priority_limit); | |
1039 | again |= get_packets_from_hw(hw); | |
1040 | } while (again); | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * return true if the card is physically present. | |
1046 | */ | |
1047 | static int is_card_present(struct ipw_hardware *hw) | |
1048 | { | |
1049 | if (hw->hw_version == HW_VERSION_1) | |
1050 | return inw(hw->base_port + IOIR) != 0xFFFF; | |
1051 | else | |
1052 | return readl(&hw->memory_info_regs->memreg_card_present) == | |
1053 | CARD_PRESENT_VALUE; | |
1054 | } | |
1055 | ||
1056 | static irqreturn_t ipwireless_handle_v1_interrupt(int irq, | |
1057 | struct ipw_hardware *hw) | |
1058 | { | |
1059 | unsigned short irqn; | |
1060 | ||
1061 | irqn = inw(hw->base_port + IOIR); | |
1062 | ||
1063 | /* Check if card is present */ | |
1064 | if (irqn == 0xFFFF) | |
1065 | return IRQ_NONE; | |
1066 | else if (irqn != 0) { | |
1067 | unsigned short ack = 0; | |
1068 | unsigned long flags; | |
1069 | ||
1070 | /* Transmit complete. */ | |
1071 | if (irqn & IR_TXINTR) { | |
1072 | ack |= IR_TXINTR; | |
63c4dbd1 | 1073 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 1074 | hw->tx_ready = 1; |
63c4dbd1 | 1075 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1076 | } |
1077 | /* Received data */ | |
1078 | if (irqn & IR_RXINTR) { | |
1079 | ack |= IR_RXINTR; | |
63c4dbd1 | 1080 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1081 | hw->rx_ready++; |
63c4dbd1 | 1082 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1083 | } |
1084 | if (ack != 0) { | |
1085 | outw(ack, hw->base_port + IOIR); | |
1086 | tasklet_schedule(&hw->tasklet); | |
1087 | } | |
1088 | return IRQ_HANDLED; | |
1089 | } | |
1090 | return IRQ_NONE; | |
1091 | } | |
1092 | ||
1093 | static void acknowledge_pcmcia_interrupt(struct ipw_hardware *hw) | |
1094 | { | |
1095 | unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); | |
1096 | ||
1097 | csr &= 0xfffd; | |
1098 | writew(csr, &hw->memregs_CCR->reg_config_and_status); | |
1099 | } | |
1100 | ||
1101 | static irqreturn_t ipwireless_handle_v2_v3_interrupt(int irq, | |
1102 | struct ipw_hardware *hw) | |
1103 | { | |
1104 | int tx = 0; | |
1105 | int rx = 0; | |
1106 | int rx_repeat = 0; | |
1107 | int try_mem_tx_old; | |
1108 | unsigned long flags; | |
1109 | ||
1110 | do { | |
1111 | ||
1112 | unsigned short memtx = readw(hw->memreg_tx); | |
1113 | unsigned short memtx_serial; | |
1114 | unsigned short memrxdone = | |
1115 | readw(&hw->memory_info_regs->memreg_rx_done); | |
1116 | ||
1117 | try_mem_tx_old = 0; | |
1118 | ||
1119 | /* check whether the interrupt was generated by ipwireless card */ | |
1120 | if (!(memtx & MEMTX_TX) && !(memrxdone & MEMRX_RX_DONE)) { | |
1121 | ||
1122 | /* check if the card uses memreg_tx_old register */ | |
1123 | if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1124 | memtx = readw(&hw->memory_info_regs->memreg_tx_old); | |
1125 | if (memtx & MEMTX_TX) { | |
1126 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1127 | ": Using memreg_tx_old\n"); | |
1128 | hw->memreg_tx = | |
1129 | &hw->memory_info_regs->memreg_tx_old; | |
1130 | } else { | |
1131 | return IRQ_NONE; | |
1132 | } | |
d4c0deb7 | 1133 | } else |
099dc4fb | 1134 | return IRQ_NONE; |
099dc4fb DS |
1135 | } |
1136 | ||
1137 | /* | |
1138 | * See if the card is physically present. Note that while it is | |
1139 | * powering up, it appears not to be present. | |
1140 | */ | |
1141 | if (!is_card_present(hw)) { | |
1142 | acknowledge_pcmcia_interrupt(hw); | |
1143 | return IRQ_HANDLED; | |
1144 | } | |
1145 | ||
1146 | memtx_serial = memtx & (unsigned short) 0xff00; | |
1147 | if (memtx & MEMTX_TX) { | |
1148 | writew(memtx_serial, hw->memreg_tx); | |
1149 | ||
1150 | if (hw->serial_number_detected) { | |
1151 | if (memtx_serial != hw->last_memtx_serial) { | |
1152 | hw->last_memtx_serial = memtx_serial; | |
63c4dbd1 | 1153 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1154 | hw->rx_ready++; |
63c4dbd1 | 1155 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1156 | rx = 1; |
1157 | } else | |
1158 | /* Ignore 'Timer Recovery' duplicates. */ | |
1159 | rx_repeat = 1; | |
1160 | } else { | |
1161 | /* | |
1162 | * If a non-zero serial number is seen, then enable | |
1163 | * serial number checking. | |
1164 | */ | |
1165 | if (memtx_serial != 0) { | |
1166 | hw->serial_number_detected = 1; | |
1167 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1168 | ": memreg_tx serial num detected\n"); | |
1169 | ||
63c4dbd1 | 1170 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1171 | hw->rx_ready++; |
63c4dbd1 | 1172 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1173 | } |
1174 | rx = 1; | |
1175 | } | |
1176 | } | |
1177 | if (memrxdone & MEMRX_RX_DONE) { | |
1178 | writew(0, &hw->memory_info_regs->memreg_rx_done); | |
63c4dbd1 | 1179 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 1180 | hw->tx_ready = 1; |
63c4dbd1 | 1181 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1182 | tx = 1; |
1183 | } | |
1184 | if (tx) | |
1185 | writew(MEMRX_PCINTACKK, | |
1186 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
1187 | ||
1188 | acknowledge_pcmcia_interrupt(hw); | |
1189 | ||
1190 | if (tx || rx) | |
1191 | tasklet_schedule(&hw->tasklet); | |
1192 | else if (!rx_repeat) { | |
1193 | if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1194 | if (hw->serial_number_detected) | |
1195 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
1196 | ": spurious interrupt - new_tx mode\n"); | |
1197 | else { | |
1198 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
622e713e | 1199 | ": no valid memreg_tx value - switching to the old memreg_tx\n"); |
099dc4fb DS |
1200 | hw->memreg_tx = |
1201 | &hw->memory_info_regs->memreg_tx_old; | |
1202 | try_mem_tx_old = 1; | |
1203 | } | |
1204 | } else | |
1205 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
1206 | ": spurious interrupt - old_tx mode\n"); | |
1207 | } | |
1208 | ||
1209 | } while (try_mem_tx_old == 1); | |
1210 | ||
1211 | return IRQ_HANDLED; | |
1212 | } | |
1213 | ||
2fc5577e | 1214 | irqreturn_t ipwireless_interrupt(int irq, void *dev_id) |
099dc4fb | 1215 | { |
5fa9167a | 1216 | struct ipw_dev *ipw = dev_id; |
099dc4fb | 1217 | |
5fa9167a DB |
1218 | if (ipw->hardware->hw_version == HW_VERSION_1) |
1219 | return ipwireless_handle_v1_interrupt(irq, ipw->hardware); | |
099dc4fb | 1220 | else |
5fa9167a | 1221 | return ipwireless_handle_v2_v3_interrupt(irq, ipw->hardware); |
099dc4fb DS |
1222 | } |
1223 | ||
1224 | static void flush_packets_to_hw(struct ipw_hardware *hw) | |
1225 | { | |
1226 | int priority_limit; | |
1227 | unsigned long flags; | |
1228 | ||
63c4dbd1 | 1229 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1230 | priority_limit = get_current_packet_priority(hw); |
63c4dbd1 | 1231 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1232 | |
1233 | while (send_pending_packet(hw, priority_limit)); | |
1234 | } | |
1235 | ||
1236 | static void send_packet(struct ipw_hardware *hw, int priority, | |
1237 | struct ipw_tx_packet *packet) | |
1238 | { | |
1239 | unsigned long flags; | |
1240 | ||
63c4dbd1 | 1241 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1242 | list_add_tail(&packet->queue, &hw->tx_queue[priority]); |
eb4e545d | 1243 | hw->tx_queued++; |
63c4dbd1 | 1244 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1245 | |
1246 | flush_packets_to_hw(hw); | |
1247 | } | |
1248 | ||
1249 | /* Create data packet, non-atomic allocation */ | |
1250 | static void *alloc_data_packet(int data_size, | |
1251 | unsigned char dest_addr, | |
1252 | unsigned char protocol) | |
1253 | { | |
1254 | struct ipw_tx_packet *packet = kzalloc( | |
1255 | sizeof(struct ipw_tx_packet) + data_size, | |
1256 | GFP_ATOMIC); | |
1257 | ||
1258 | if (!packet) | |
1259 | return NULL; | |
1260 | ||
1261 | INIT_LIST_HEAD(&packet->queue); | |
1262 | packet->dest_addr = dest_addr; | |
1263 | packet->protocol = protocol; | |
1264 | packet->length = data_size; | |
1265 | ||
1266 | return packet; | |
1267 | } | |
1268 | ||
1269 | static void *alloc_ctrl_packet(int header_size, | |
1270 | unsigned char dest_addr, | |
1271 | unsigned char protocol, | |
1272 | unsigned char sig_no) | |
1273 | { | |
1274 | /* | |
1275 | * sig_no is located right after ipw_tx_packet struct in every | |
1276 | * CTRL or SETUP packets, we can use ipw_control_packet as a | |
1277 | * common struct | |
1278 | */ | |
1279 | struct ipw_control_packet *packet = kzalloc(header_size, GFP_ATOMIC); | |
1280 | ||
1281 | if (!packet) | |
1282 | return NULL; | |
1283 | ||
1284 | INIT_LIST_HEAD(&packet->header.queue); | |
1285 | packet->header.dest_addr = dest_addr; | |
1286 | packet->header.protocol = protocol; | |
1287 | packet->header.length = header_size - sizeof(struct ipw_tx_packet); | |
1288 | packet->body.sig_no = sig_no; | |
1289 | ||
1290 | return packet; | |
1291 | } | |
1292 | ||
1293 | int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx, | |
ff3e990e | 1294 | const unsigned char *data, unsigned int length, |
099dc4fb DS |
1295 | void (*callback) (void *cb, unsigned int length), |
1296 | void *callback_data) | |
1297 | { | |
1298 | struct ipw_tx_packet *packet; | |
1299 | ||
d4c0deb7 DS |
1300 | packet = alloc_data_packet(length, (channel_idx + 1), |
1301 | TL_PROTOCOLID_COM_DATA); | |
099dc4fb DS |
1302 | if (!packet) |
1303 | return -ENOMEM; | |
1304 | packet->packet_callback = callback; | |
1305 | packet->callback_data = callback_data; | |
d4c0deb7 DS |
1306 | memcpy((unsigned char *) packet + sizeof(struct ipw_tx_packet), data, |
1307 | length); | |
099dc4fb DS |
1308 | |
1309 | send_packet(hw, PRIO_DATA, packet); | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | static int set_control_line(struct ipw_hardware *hw, int prio, | |
1314 | unsigned int channel_idx, int line, int state) | |
1315 | { | |
1316 | struct ipw_control_packet *packet; | |
1317 | int protocolid = TL_PROTOCOLID_COM_CTRL; | |
1318 | ||
1319 | if (prio == PRIO_SETUP) | |
1320 | protocolid = TL_PROTOCOLID_SETUP; | |
1321 | ||
1322 | packet = alloc_ctrl_packet(sizeof(struct ipw_control_packet), | |
d4c0deb7 | 1323 | (channel_idx + 1), protocolid, line); |
099dc4fb DS |
1324 | if (!packet) |
1325 | return -ENOMEM; | |
1326 | packet->header.length = sizeof(struct ipw_control_packet_body); | |
d4c0deb7 | 1327 | packet->body.value = (state == 0 ? 0 : 1); |
099dc4fb DS |
1328 | send_packet(hw, prio, &packet->header); |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | static int set_DTR(struct ipw_hardware *hw, int priority, | |
1334 | unsigned int channel_idx, int state) | |
1335 | { | |
1336 | if (state != 0) | |
1337 | hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_DTR; | |
1338 | else | |
1339 | hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_DTR; | |
1340 | ||
1341 | return set_control_line(hw, priority, channel_idx, COMCTRL_DTR, state); | |
1342 | } | |
1343 | ||
1344 | static int set_RTS(struct ipw_hardware *hw, int priority, | |
1345 | unsigned int channel_idx, int state) | |
1346 | { | |
1347 | if (state != 0) | |
1348 | hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_RTS; | |
1349 | else | |
1350 | hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_RTS; | |
1351 | ||
1352 | return set_control_line(hw, priority, channel_idx, COMCTRL_RTS, state); | |
1353 | } | |
1354 | ||
1355 | int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx, | |
1356 | int state) | |
1357 | { | |
1358 | return set_DTR(hw, PRIO_CTRL, channel_idx, state); | |
1359 | } | |
1360 | ||
1361 | int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx, | |
1362 | int state) | |
1363 | { | |
1364 | return set_RTS(hw, PRIO_CTRL, channel_idx, state); | |
1365 | } | |
1366 | ||
1367 | struct ipw_setup_get_version_query_packet { | |
1368 | struct ipw_tx_packet header; | |
1369 | struct tl_setup_get_version_qry body; | |
1370 | }; | |
1371 | ||
1372 | struct ipw_setup_config_packet { | |
1373 | struct ipw_tx_packet header; | |
1374 | struct tl_setup_config_msg body; | |
1375 | }; | |
1376 | ||
1377 | struct ipw_setup_config_done_packet { | |
1378 | struct ipw_tx_packet header; | |
1379 | struct tl_setup_config_done_msg body; | |
1380 | }; | |
1381 | ||
1382 | struct ipw_setup_open_packet { | |
1383 | struct ipw_tx_packet header; | |
1384 | struct tl_setup_open_msg body; | |
1385 | }; | |
1386 | ||
1387 | struct ipw_setup_info_packet { | |
1388 | struct ipw_tx_packet header; | |
1389 | struct tl_setup_info_msg body; | |
1390 | }; | |
1391 | ||
1392 | struct ipw_setup_reboot_msg_ack { | |
1393 | struct ipw_tx_packet header; | |
1394 | struct TlSetupRebootMsgAck body; | |
1395 | }; | |
1396 | ||
1397 | /* This handles the actual initialization of the card */ | |
1398 | static void __handle_setup_get_version_rsp(struct ipw_hardware *hw) | |
1399 | { | |
1400 | struct ipw_setup_config_packet *config_packet; | |
1401 | struct ipw_setup_config_done_packet *config_done_packet; | |
1402 | struct ipw_setup_open_packet *open_packet; | |
1403 | struct ipw_setup_info_packet *info_packet; | |
1404 | int port; | |
1405 | unsigned int channel_idx; | |
1406 | ||
1407 | /* generate config packet */ | |
1408 | for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { | |
1409 | config_packet = alloc_ctrl_packet( | |
1410 | sizeof(struct ipw_setup_config_packet), | |
1411 | ADDR_SETUP_PROT, | |
1412 | TL_PROTOCOLID_SETUP, | |
1413 | TL_SETUP_SIGNO_CONFIG_MSG); | |
1414 | if (!config_packet) | |
1415 | goto exit_nomem; | |
1416 | config_packet->header.length = sizeof(struct tl_setup_config_msg); | |
1417 | config_packet->body.port_no = port; | |
1418 | config_packet->body.prio_data = PRIO_DATA; | |
1419 | config_packet->body.prio_ctrl = PRIO_CTRL; | |
1420 | send_packet(hw, PRIO_SETUP, &config_packet->header); | |
1421 | } | |
1422 | config_done_packet = alloc_ctrl_packet( | |
1423 | sizeof(struct ipw_setup_config_done_packet), | |
1424 | ADDR_SETUP_PROT, | |
1425 | TL_PROTOCOLID_SETUP, | |
1426 | TL_SETUP_SIGNO_CONFIG_DONE_MSG); | |
1427 | if (!config_done_packet) | |
1428 | goto exit_nomem; | |
1429 | config_done_packet->header.length = sizeof(struct tl_setup_config_done_msg); | |
1430 | send_packet(hw, PRIO_SETUP, &config_done_packet->header); | |
1431 | ||
1432 | /* generate open packet */ | |
1433 | for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { | |
1434 | open_packet = alloc_ctrl_packet( | |
1435 | sizeof(struct ipw_setup_open_packet), | |
1436 | ADDR_SETUP_PROT, | |
1437 | TL_PROTOCOLID_SETUP, | |
1438 | TL_SETUP_SIGNO_OPEN_MSG); | |
1439 | if (!open_packet) | |
1440 | goto exit_nomem; | |
1441 | open_packet->header.length = sizeof(struct tl_setup_open_msg); | |
1442 | open_packet->body.port_no = port; | |
1443 | send_packet(hw, PRIO_SETUP, &open_packet->header); | |
1444 | } | |
1445 | for (channel_idx = 0; | |
1446 | channel_idx < NL_NUM_OF_ADDRESSES; channel_idx++) { | |
1447 | int ret; | |
1448 | ||
1449 | ret = set_DTR(hw, PRIO_SETUP, channel_idx, | |
1450 | (hw->control_lines[channel_idx] & | |
1451 | IPW_CONTROL_LINE_DTR) != 0); | |
1452 | if (ret) { | |
1453 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1454 | ": error setting DTR (%d)\n", ret); | |
1455 | return; | |
1456 | } | |
1457 | ||
52df3d5b | 1458 | ret = set_RTS(hw, PRIO_SETUP, channel_idx, |
099dc4fb DS |
1459 | (hw->control_lines [channel_idx] & |
1460 | IPW_CONTROL_LINE_RTS) != 0); | |
1461 | if (ret) { | |
1462 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1463 | ": error setting RTS (%d)\n", ret); | |
1464 | return; | |
1465 | } | |
1466 | } | |
1467 | /* | |
1468 | * For NDIS we assume that we are using sync PPP frames, for COM async. | |
1469 | * This driver uses NDIS mode too. We don't bother with translation | |
1470 | * from async -> sync PPP. | |
1471 | */ | |
1472 | info_packet = alloc_ctrl_packet(sizeof(struct ipw_setup_info_packet), | |
1473 | ADDR_SETUP_PROT, | |
1474 | TL_PROTOCOLID_SETUP, | |
1475 | TL_SETUP_SIGNO_INFO_MSG); | |
1476 | if (!info_packet) | |
1477 | goto exit_nomem; | |
1478 | info_packet->header.length = sizeof(struct tl_setup_info_msg); | |
1479 | info_packet->body.driver_type = NDISWAN_DRIVER; | |
1480 | info_packet->body.major_version = NDISWAN_DRIVER_MAJOR_VERSION; | |
1481 | info_packet->body.minor_version = NDISWAN_DRIVER_MINOR_VERSION; | |
1482 | send_packet(hw, PRIO_SETUP, &info_packet->header); | |
1483 | ||
1484 | /* Initialization is now complete, so we clear the 'to_setup' flag */ | |
1485 | hw->to_setup = 0; | |
1486 | ||
1487 | return; | |
1488 | ||
1489 | exit_nomem: | |
1490 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1491 | ": not enough memory to alloc control packet\n"); | |
1492 | hw->to_setup = -1; | |
1493 | } | |
1494 | ||
1495 | static void handle_setup_get_version_rsp(struct ipw_hardware *hw, | |
1496 | unsigned char vers_no) | |
1497 | { | |
1498 | del_timer(&hw->setup_timer); | |
1499 | hw->initializing = 0; | |
1500 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": card is ready.\n"); | |
1501 | ||
1502 | if (vers_no == TL_SETUP_VERSION) | |
1503 | __handle_setup_get_version_rsp(hw); | |
1504 | else | |
622e713e | 1505 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME |
099dc4fb DS |
1506 | ": invalid hardware version no %u\n", |
1507 | (unsigned int) vers_no); | |
1508 | } | |
1509 | ||
1510 | static void ipw_send_setup_packet(struct ipw_hardware *hw) | |
1511 | { | |
1512 | struct ipw_setup_get_version_query_packet *ver_packet; | |
1513 | ||
1514 | ver_packet = alloc_ctrl_packet( | |
1515 | sizeof(struct ipw_setup_get_version_query_packet), | |
1516 | ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, | |
1517 | TL_SETUP_SIGNO_GET_VERSION_QRY); | |
1518 | ver_packet->header.length = sizeof(struct tl_setup_get_version_qry); | |
1519 | ||
1520 | /* | |
1521 | * Response is handled in handle_received_SETUP_packet | |
1522 | */ | |
1523 | send_packet(hw, PRIO_SETUP, &ver_packet->header); | |
1524 | } | |
1525 | ||
1526 | static void handle_received_SETUP_packet(struct ipw_hardware *hw, | |
1527 | unsigned int address, | |
ff3e990e | 1528 | const unsigned char *data, int len, |
099dc4fb DS |
1529 | int is_last) |
1530 | { | |
ff3e990e | 1531 | const union ipw_setup_rx_msg *rx_msg = (const union ipw_setup_rx_msg *) data; |
099dc4fb DS |
1532 | |
1533 | if (address != ADDR_SETUP_PROT) { | |
1534 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1535 | ": setup packet has bad address %d\n", address); | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | switch (rx_msg->sig_no) { | |
1540 | case TL_SETUP_SIGNO_GET_VERSION_RSP: | |
1541 | if (hw->to_setup) | |
1542 | handle_setup_get_version_rsp(hw, | |
1543 | rx_msg->version_rsp_msg.version); | |
1544 | break; | |
1545 | ||
1546 | case TL_SETUP_SIGNO_OPEN_MSG: | |
1547 | if (ipwireless_debug) { | |
1548 | unsigned int channel_idx = rx_msg->open_msg.port_no - 1; | |
1549 | ||
1550 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1551 | ": OPEN_MSG [channel %u] reply received\n", | |
1552 | channel_idx); | |
1553 | } | |
1554 | break; | |
1555 | ||
1556 | case TL_SETUP_SIGNO_INFO_MSG_ACK: | |
1557 | if (ipwireless_debug) | |
1558 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1559 | ": card successfully configured as NDISWAN\n"); | |
1560 | break; | |
1561 | ||
1562 | case TL_SETUP_SIGNO_REBOOT_MSG: | |
1563 | if (hw->to_setup) | |
1564 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1565 | ": Setup not completed - ignoring reboot msg\n"); | |
1566 | else { | |
1567 | struct ipw_setup_reboot_msg_ack *packet; | |
1568 | ||
1569 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1570 | ": Acknowledging REBOOT message\n"); | |
1571 | packet = alloc_ctrl_packet( | |
1572 | sizeof(struct ipw_setup_reboot_msg_ack), | |
1573 | ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, | |
1574 | TL_SETUP_SIGNO_REBOOT_MSG_ACK); | |
1575 | packet->header.length = | |
1576 | sizeof(struct TlSetupRebootMsgAck); | |
1577 | send_packet(hw, PRIO_SETUP, &packet->header); | |
1578 | if (hw->reboot_callback) | |
1579 | hw->reboot_callback(hw->reboot_callback_data); | |
1580 | } | |
1581 | break; | |
1582 | ||
1583 | default: | |
1584 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1585 | ": unknown setup message %u received\n", | |
1586 | (unsigned int) rx_msg->sig_no); | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | static void do_close_hardware(struct ipw_hardware *hw) | |
1591 | { | |
1592 | unsigned int irqn; | |
1593 | ||
1594 | if (hw->hw_version == HW_VERSION_1) { | |
1595 | /* Disable TX and RX interrupts. */ | |
1596 | outw(0, hw->base_port + IOIER); | |
1597 | ||
1598 | /* Acknowledge any outstanding interrupt requests */ | |
1599 | irqn = inw(hw->base_port + IOIR); | |
1600 | if (irqn & IR_TXINTR) | |
1601 | outw(IR_TXINTR, hw->base_port + IOIR); | |
1602 | if (irqn & IR_RXINTR) | |
1603 | outw(IR_RXINTR, hw->base_port + IOIR); | |
1604 | ||
1605 | synchronize_irq(hw->irq); | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | struct ipw_hardware *ipwireless_hardware_create(void) | |
1610 | { | |
1611 | int i; | |
1612 | struct ipw_hardware *hw = | |
1613 | kzalloc(sizeof(struct ipw_hardware), GFP_KERNEL); | |
1614 | ||
1615 | if (!hw) | |
1616 | return NULL; | |
1617 | ||
1618 | hw->irq = -1; | |
1619 | hw->initializing = 1; | |
1620 | hw->tx_ready = 1; | |
1621 | hw->rx_bytes_queued = 0; | |
1622 | hw->rx_pool_size = 0; | |
1623 | hw->last_memtx_serial = (unsigned short) 0xffff; | |
1624 | for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) | |
1625 | INIT_LIST_HEAD(&hw->tx_queue[i]); | |
1626 | ||
1627 | INIT_LIST_HEAD(&hw->rx_queue); | |
1628 | INIT_LIST_HEAD(&hw->rx_pool); | |
63c4dbd1 | 1629 | spin_lock_init(&hw->lock); |
099dc4fb DS |
1630 | tasklet_init(&hw->tasklet, ipwireless_do_tasklet, (unsigned long) hw); |
1631 | INIT_WORK(&hw->work_rx, ipw_receive_data_work); | |
1632 | setup_timer(&hw->setup_timer, ipwireless_setup_timer, | |
1633 | (unsigned long) hw); | |
1634 | ||
1635 | return hw; | |
1636 | } | |
1637 | ||
1638 | void ipwireless_init_hardware_v1(struct ipw_hardware *hw, | |
1639 | unsigned int base_port, | |
1640 | void __iomem *attr_memory, | |
1641 | void __iomem *common_memory, | |
1642 | int is_v2_card, | |
1643 | void (*reboot_callback) (void *data), | |
1644 | void *reboot_callback_data) | |
1645 | { | |
1646 | if (hw->removed) { | |
1647 | hw->removed = 0; | |
1648 | enable_irq(hw->irq); | |
1649 | } | |
1650 | hw->base_port = base_port; | |
d4c0deb7 DS |
1651 | hw->hw_version = (is_v2_card ? HW_VERSION_2 : HW_VERSION_1); |
1652 | hw->ll_mtu = (hw->hw_version == HW_VERSION_1 ? LL_MTU_V1 : LL_MTU_V2); | |
099dc4fb DS |
1653 | hw->memregs_CCR = (struct MEMCCR __iomem *) |
1654 | ((unsigned short __iomem *) attr_memory + 0x200); | |
1655 | hw->memory_info_regs = (struct MEMINFREG __iomem *) common_memory; | |
1656 | hw->memreg_tx = &hw->memory_info_regs->memreg_tx_new; | |
1657 | hw->reboot_callback = reboot_callback; | |
1658 | hw->reboot_callback_data = reboot_callback_data; | |
1659 | } | |
1660 | ||
1661 | void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw) | |
1662 | { | |
1663 | hw->initializing = 1; | |
1664 | hw->init_loops = 0; | |
1665 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1666 | ": waiting for card to start up...\n"); | |
1667 | ipwireless_setup_timer((unsigned long) hw); | |
1668 | } | |
1669 | ||
1670 | static void ipwireless_setup_timer(unsigned long data) | |
1671 | { | |
1672 | struct ipw_hardware *hw = (struct ipw_hardware *) data; | |
1673 | ||
1674 | hw->init_loops++; | |
1675 | ||
1676 | if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY && | |
1677 | hw->hw_version == HW_VERSION_2 && | |
1678 | hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1679 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1680 | ": failed to startup using TX2, trying TX\n"); | |
1681 | ||
1682 | hw->memreg_tx = &hw->memory_info_regs->memreg_tx_old; | |
1683 | hw->init_loops = 0; | |
1684 | } | |
1685 | /* Give up after a certain number of retries */ | |
1686 | if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY) { | |
1687 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1688 | ": card failed to start up!\n"); | |
1689 | hw->initializing = 0; | |
1690 | } else { | |
1691 | /* Do not attempt to write to the board if it is not present. */ | |
1692 | if (is_card_present(hw)) { | |
1693 | unsigned long flags; | |
1694 | ||
63c4dbd1 | 1695 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
1696 | hw->to_setup = 1; |
1697 | hw->tx_ready = 1; | |
63c4dbd1 | 1698 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1699 | tasklet_schedule(&hw->tasklet); |
1700 | } | |
1701 | ||
1702 | mod_timer(&hw->setup_timer, | |
1703 | jiffies + msecs_to_jiffies(TL_SETUP_VERSION_QRY_TMO)); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * Stop any interrupts from executing so that, once this function returns, | |
1709 | * other layers of the driver can be sure they won't get any more callbacks. | |
1710 | * Thus must be called on a proper process context. | |
1711 | */ | |
1712 | void ipwireless_stop_interrupts(struct ipw_hardware *hw) | |
1713 | { | |
1714 | if (!hw->shutting_down) { | |
1715 | /* Tell everyone we are going down. */ | |
1716 | hw->shutting_down = 1; | |
1717 | del_timer(&hw->setup_timer); | |
1718 | ||
1719 | /* Prevent the hardware from sending any more interrupts */ | |
1720 | do_close_hardware(hw); | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | void ipwireless_hardware_free(struct ipw_hardware *hw) | |
1725 | { | |
1726 | int i; | |
1727 | struct ipw_rx_packet *rp, *rq; | |
1728 | struct ipw_tx_packet *tp, *tq; | |
1729 | ||
1730 | ipwireless_stop_interrupts(hw); | |
1731 | ||
43829731 | 1732 | flush_work(&hw->work_rx); |
099dc4fb DS |
1733 | |
1734 | for (i = 0; i < NL_NUM_OF_ADDRESSES; i++) | |
f3c8279d | 1735 | kfree(hw->packet_assembler[i]); |
099dc4fb DS |
1736 | |
1737 | for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) | |
1738 | list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) { | |
1739 | list_del(&tp->queue); | |
1740 | kfree(tp); | |
1741 | } | |
1742 | ||
1743 | list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) { | |
1744 | list_del(&rp->queue); | |
1745 | kfree(rp); | |
1746 | } | |
1747 | ||
1748 | list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) { | |
1749 | list_del(&rp->queue); | |
1750 | kfree(rp); | |
1751 | } | |
1752 | kfree(hw); | |
1753 | } | |
1754 | ||
1755 | /* | |
1756 | * Associate the specified network with this hardware, so it will receive events | |
1757 | * from it. | |
1758 | */ | |
1759 | void ipwireless_associate_network(struct ipw_hardware *hw, | |
1760 | struct ipw_network *network) | |
1761 | { | |
1762 | hw->network = network; | |
1763 | } |