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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
099dc4fb DS |
2 | /* |
3 | * IPWireless 3G PCMCIA Network Driver | |
4 | * | |
5 | * Original code | |
6 | * by Stephen Blackheath <stephen@blacksapphire.com>, | |
7 | * Ben Martel <benm@symmetric.co.nz> | |
8 | * | |
9 | * Copyrighted as follows: | |
10 | * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) | |
11 | * | |
12 | * Various driver changes and rewrites, port to new kernels | |
13 | * Copyright (C) 2006-2007 Jiri Kosina | |
14 | * | |
15 | * Misc code cleanups and updates | |
16 | * Copyright (C) 2007 David Sterba | |
17 | */ | |
18 | ||
19 | #include <linux/interrupt.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/irq.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/slab.h> | |
25 | ||
26 | #include "hardware.h" | |
27 | #include "setup_protocol.h" | |
28 | #include "network.h" | |
29 | #include "main.h" | |
30 | ||
31 | static void ipw_send_setup_packet(struct ipw_hardware *hw); | |
32 | static void handle_received_SETUP_packet(struct ipw_hardware *ipw, | |
33 | unsigned int address, | |
ff3e990e | 34 | const unsigned char *data, int len, |
099dc4fb | 35 | int is_last); |
e99e88a9 | 36 | static void ipwireless_setup_timer(struct timer_list *t); |
099dc4fb | 37 | static void handle_received_CTRL_packet(struct ipw_hardware *hw, |
ff3e990e | 38 | unsigned int channel_idx, const unsigned char *data, int len); |
099dc4fb DS |
39 | |
40 | /*#define TIMING_DIAGNOSTICS*/ | |
41 | ||
42 | #ifdef TIMING_DIAGNOSTICS | |
43 | ||
44 | static struct timing_stats { | |
45 | unsigned long last_report_time; | |
46 | unsigned long read_time; | |
47 | unsigned long write_time; | |
48 | unsigned long read_bytes; | |
49 | unsigned long write_bytes; | |
50 | unsigned long start_time; | |
51 | }; | |
52 | ||
53 | static void start_timing(void) | |
54 | { | |
55 | timing_stats.start_time = jiffies; | |
56 | } | |
57 | ||
58 | static void end_read_timing(unsigned length) | |
59 | { | |
60 | timing_stats.read_time += (jiffies - start_time); | |
61 | timing_stats.read_bytes += length + 2; | |
62 | report_timing(); | |
63 | } | |
64 | ||
65 | static void end_write_timing(unsigned length) | |
66 | { | |
67 | timing_stats.write_time += (jiffies - start_time); | |
68 | timing_stats.write_bytes += length + 2; | |
69 | report_timing(); | |
70 | } | |
71 | ||
72 | static void report_timing(void) | |
73 | { | |
74 | unsigned long since = jiffies - timing_stats.last_report_time; | |
75 | ||
76 | /* If it's been more than one second... */ | |
77 | if (since >= HZ) { | |
78 | int first = (timing_stats.last_report_time == 0); | |
79 | ||
80 | timing_stats.last_report_time = jiffies; | |
81 | if (!first) | |
82 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 83 | ": %u us elapsed - read %lu bytes in %u us, wrote %lu bytes in %u us\n", |
099dc4fb DS |
84 | jiffies_to_usecs(since), |
85 | timing_stats.read_bytes, | |
86 | jiffies_to_usecs(timing_stats.read_time), | |
87 | timing_stats.write_bytes, | |
88 | jiffies_to_usecs(timing_stats.write_time)); | |
89 | ||
90 | timing_stats.read_time = 0; | |
91 | timing_stats.write_time = 0; | |
92 | timing_stats.read_bytes = 0; | |
93 | timing_stats.write_bytes = 0; | |
94 | } | |
95 | } | |
96 | #else | |
97 | static void start_timing(void) { } | |
98 | static void end_read_timing(unsigned length) { } | |
99 | static void end_write_timing(unsigned length) { } | |
100 | #endif | |
101 | ||
102 | /* Imported IPW definitions */ | |
103 | ||
104 | #define LL_MTU_V1 318 | |
105 | #define LL_MTU_V2 250 | |
106 | #define LL_MTU_MAX (LL_MTU_V1 > LL_MTU_V2 ? LL_MTU_V1 : LL_MTU_V2) | |
107 | ||
108 | #define PRIO_DATA 2 | |
109 | #define PRIO_CTRL 1 | |
110 | #define PRIO_SETUP 0 | |
111 | ||
112 | /* Addresses */ | |
113 | #define ADDR_SETUP_PROT 0 | |
114 | ||
115 | /* Protocol ids */ | |
116 | enum { | |
117 | /* Identifier for the Com Data protocol */ | |
118 | TL_PROTOCOLID_COM_DATA = 0, | |
119 | ||
120 | /* Identifier for the Com Control protocol */ | |
121 | TL_PROTOCOLID_COM_CTRL = 1, | |
122 | ||
123 | /* Identifier for the Setup protocol */ | |
124 | TL_PROTOCOLID_SETUP = 2 | |
125 | }; | |
126 | ||
127 | /* Number of bytes in NL packet header (cannot do | |
128 | * sizeof(nl_packet_header) since it's a bitfield) */ | |
129 | #define NL_FIRST_PACKET_HEADER_SIZE 3 | |
130 | ||
131 | /* Number of bytes in NL packet header (cannot do | |
132 | * sizeof(nl_packet_header) since it's a bitfield) */ | |
133 | #define NL_FOLLOWING_PACKET_HEADER_SIZE 1 | |
134 | ||
135 | struct nl_first_packet_header { | |
099dc4fb DS |
136 | unsigned char protocol:3; |
137 | unsigned char address:3; | |
138 | unsigned char packet_rank:2; | |
099dc4fb DS |
139 | unsigned char length_lsb; |
140 | unsigned char length_msb; | |
141 | }; | |
142 | ||
143 | struct nl_packet_header { | |
099dc4fb DS |
144 | unsigned char protocol:3; |
145 | unsigned char address:3; | |
146 | unsigned char packet_rank:2; | |
099dc4fb DS |
147 | }; |
148 | ||
149 | /* Value of 'packet_rank' above */ | |
150 | #define NL_INTERMEDIATE_PACKET 0x0 | |
151 | #define NL_LAST_PACKET 0x1 | |
152 | #define NL_FIRST_PACKET 0x2 | |
153 | ||
154 | union nl_packet { | |
155 | /* Network packet header of the first packet (a special case) */ | |
156 | struct nl_first_packet_header hdr_first; | |
157 | /* Network packet header of the following packets (if any) */ | |
158 | struct nl_packet_header hdr; | |
159 | /* Complete network packet (header + data) */ | |
160 | unsigned char rawpkt[LL_MTU_MAX]; | |
161 | } __attribute__ ((__packed__)); | |
162 | ||
163 | #define HW_VERSION_UNKNOWN -1 | |
164 | #define HW_VERSION_1 1 | |
165 | #define HW_VERSION_2 2 | |
166 | ||
167 | /* IPW I/O ports */ | |
168 | #define IOIER 0x00 /* Interrupt Enable Register */ | |
169 | #define IOIR 0x02 /* Interrupt Source/ACK register */ | |
170 | #define IODCR 0x04 /* Data Control Register */ | |
171 | #define IODRR 0x06 /* Data Read Register */ | |
172 | #define IODWR 0x08 /* Data Write Register */ | |
173 | #define IOESR 0x0A /* Embedded Driver Status Register */ | |
174 | #define IORXR 0x0C /* Rx Fifo Register (Host to Embedded) */ | |
175 | #define IOTXR 0x0E /* Tx Fifo Register (Embedded to Host) */ | |
176 | ||
177 | /* I/O ports and bit definitions for version 1 of the hardware */ | |
178 | ||
179 | /* IER bits*/ | |
180 | #define IER_RXENABLED 0x1 | |
181 | #define IER_TXENABLED 0x2 | |
182 | ||
183 | /* ISR bits */ | |
184 | #define IR_RXINTR 0x1 | |
185 | #define IR_TXINTR 0x2 | |
186 | ||
187 | /* DCR bits */ | |
188 | #define DCR_RXDONE 0x1 | |
189 | #define DCR_TXDONE 0x2 | |
190 | #define DCR_RXRESET 0x4 | |
191 | #define DCR_TXRESET 0x8 | |
192 | ||
193 | /* I/O ports and bit definitions for version 2 of the hardware */ | |
194 | ||
195 | struct MEMCCR { | |
196 | unsigned short reg_config_option; /* PCCOR: Configuration Option Register */ | |
197 | unsigned short reg_config_and_status; /* PCCSR: Configuration and Status Register */ | |
198 | unsigned short reg_pin_replacement; /* PCPRR: Pin Replacemant Register */ | |
199 | unsigned short reg_socket_and_copy; /* PCSCR: Socket and Copy Register */ | |
200 | unsigned short reg_ext_status; /* PCESR: Extendend Status Register */ | |
201 | unsigned short reg_io_base; /* PCIOB: I/O Base Register */ | |
202 | }; | |
203 | ||
204 | struct MEMINFREG { | |
205 | unsigned short memreg_tx_old; /* TX Register (R/W) */ | |
206 | unsigned short pad1; | |
207 | unsigned short memreg_rx_done; /* RXDone Register (R/W) */ | |
208 | unsigned short pad2; | |
209 | unsigned short memreg_rx; /* RX Register (R/W) */ | |
210 | unsigned short pad3; | |
211 | unsigned short memreg_pc_interrupt_ack; /* PC intr Ack Register (W) */ | |
212 | unsigned short pad4; | |
213 | unsigned long memreg_card_present;/* Mask for Host to check (R) for | |
214 | * CARD_PRESENT_VALUE */ | |
215 | unsigned short memreg_tx_new; /* TX2 (new) Register (R/W) */ | |
216 | }; | |
217 | ||
099dc4fb DS |
218 | #define CARD_PRESENT_VALUE (0xBEEFCAFEUL) |
219 | ||
220 | #define MEMTX_TX 0x0001 | |
221 | #define MEMRX_RX 0x0001 | |
222 | #define MEMRX_RX_DONE 0x0001 | |
223 | #define MEMRX_PCINTACKK 0x0001 | |
099dc4fb DS |
224 | |
225 | #define NL_NUM_OF_PRIORITIES 3 | |
226 | #define NL_NUM_OF_PROTOCOLS 3 | |
227 | #define NL_NUM_OF_ADDRESSES NO_OF_IPW_CHANNELS | |
228 | ||
229 | struct ipw_hardware { | |
230 | unsigned int base_port; | |
231 | short hw_version; | |
232 | unsigned short ll_mtu; | |
63c4dbd1 | 233 | spinlock_t lock; |
099dc4fb DS |
234 | |
235 | int initializing; | |
236 | int init_loops; | |
237 | struct timer_list setup_timer; | |
238 | ||
eb4e545d | 239 | /* Flag if hw is ready to send next packet */ |
099dc4fb | 240 | int tx_ready; |
eb4e545d | 241 | /* Count of pending packets to be sent */ |
099dc4fb | 242 | int tx_queued; |
eb4e545d | 243 | struct list_head tx_queue[NL_NUM_OF_PRIORITIES]; |
099dc4fb DS |
244 | |
245 | int rx_bytes_queued; | |
246 | struct list_head rx_queue; | |
247 | /* Pool of rx_packet structures that are not currently used. */ | |
248 | struct list_head rx_pool; | |
249 | int rx_pool_size; | |
250 | /* True if reception of data is blocked while userspace processes it. */ | |
251 | int blocking_rx; | |
252 | /* True if there is RX data ready on the hardware. */ | |
253 | int rx_ready; | |
254 | unsigned short last_memtx_serial; | |
255 | /* | |
256 | * Newer versions of the V2 card firmware send serial numbers in the | |
257 | * MemTX register. 'serial_number_detected' is set true when we detect | |
258 | * a non-zero serial number (indicating the new firmware). Thereafter, | |
259 | * the driver can safely ignore the Timer Recovery re-sends to avoid | |
260 | * out-of-sync problems. | |
261 | */ | |
262 | int serial_number_detected; | |
263 | struct work_struct work_rx; | |
264 | ||
265 | /* True if we are to send the set-up data to the hardware. */ | |
266 | int to_setup; | |
267 | ||
268 | /* Card has been removed */ | |
269 | int removed; | |
270 | /* Saved irq value when we disable the interrupt. */ | |
271 | int irq; | |
272 | /* True if this driver is shutting down. */ | |
273 | int shutting_down; | |
274 | /* Modem control lines */ | |
275 | unsigned int control_lines[NL_NUM_OF_ADDRESSES]; | |
276 | struct ipw_rx_packet *packet_assembler[NL_NUM_OF_ADDRESSES]; | |
277 | ||
278 | struct tasklet_struct tasklet; | |
279 | ||
280 | /* The handle for the network layer, for the sending of events to it. */ | |
281 | struct ipw_network *network; | |
282 | struct MEMINFREG __iomem *memory_info_regs; | |
283 | struct MEMCCR __iomem *memregs_CCR; | |
284 | void (*reboot_callback) (void *data); | |
285 | void *reboot_callback_data; | |
286 | ||
287 | unsigned short __iomem *memreg_tx; | |
288 | }; | |
289 | ||
290 | /* | |
291 | * Packet info structure for tx packets. | |
292 | * Note: not all the fields defined here are required for all protocols | |
293 | */ | |
294 | struct ipw_tx_packet { | |
295 | struct list_head queue; | |
296 | /* channel idx + 1 */ | |
297 | unsigned char dest_addr; | |
298 | /* SETUP, CTRL or DATA */ | |
299 | unsigned char protocol; | |
300 | /* Length of data block, which starts at the end of this structure */ | |
301 | unsigned short length; | |
302 | /* Sending state */ | |
303 | /* Offset of where we've sent up to so far */ | |
304 | unsigned long offset; | |
305 | /* Count of packet fragments, starting at 0 */ | |
306 | int fragment_count; | |
307 | ||
308 | /* Called after packet is sent and before is freed */ | |
309 | void (*packet_callback) (void *cb_data, unsigned int packet_length); | |
310 | void *callback_data; | |
311 | }; | |
312 | ||
313 | /* Signals from DTE */ | |
314 | #define COMCTRL_RTS 0 | |
315 | #define COMCTRL_DTR 1 | |
316 | ||
317 | /* Signals from DCE */ | |
318 | #define COMCTRL_CTS 2 | |
319 | #define COMCTRL_DCD 3 | |
320 | #define COMCTRL_DSR 4 | |
321 | #define COMCTRL_RI 5 | |
322 | ||
323 | struct ipw_control_packet_body { | |
324 | /* DTE signal or DCE signal */ | |
325 | unsigned char sig_no; | |
326 | /* 0: set signal, 1: clear signal */ | |
327 | unsigned char value; | |
328 | } __attribute__ ((__packed__)); | |
329 | ||
330 | struct ipw_control_packet { | |
331 | struct ipw_tx_packet header; | |
332 | struct ipw_control_packet_body body; | |
333 | }; | |
334 | ||
335 | struct ipw_rx_packet { | |
336 | struct list_head queue; | |
337 | unsigned int capacity; | |
338 | unsigned int length; | |
339 | unsigned int protocol; | |
340 | unsigned int channel_idx; | |
341 | }; | |
342 | ||
099dc4fb DS |
343 | static char *data_type(const unsigned char *buf, unsigned length) |
344 | { | |
345 | struct nl_packet_header *hdr = (struct nl_packet_header *) buf; | |
346 | ||
347 | if (length == 0) | |
348 | return " "; | |
349 | ||
350 | if (hdr->packet_rank & NL_FIRST_PACKET) { | |
351 | switch (hdr->protocol) { | |
352 | case TL_PROTOCOLID_COM_DATA: return "DATA "; | |
353 | case TL_PROTOCOLID_COM_CTRL: return "CTRL "; | |
354 | case TL_PROTOCOLID_SETUP: return "SETUP"; | |
355 | default: return "???? "; | |
356 | } | |
357 | } else | |
358 | return " "; | |
359 | } | |
360 | ||
361 | #define DUMP_MAX_BYTES 64 | |
362 | ||
363 | static void dump_data_bytes(const char *type, const unsigned char *data, | |
364 | unsigned length) | |
365 | { | |
366 | char prefix[56]; | |
367 | ||
368 | sprintf(prefix, IPWIRELESS_PCCARD_NAME ": %s %s ", | |
369 | type, data_type(data, length)); | |
370 | print_hex_dump_bytes(prefix, 0, (void *)data, | |
371 | length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES); | |
372 | } | |
373 | ||
d54c2752 DS |
374 | static void swap_packet_bitfield_to_le(unsigned char *data) |
375 | { | |
376 | #ifdef __BIG_ENDIAN_BITFIELD | |
377 | unsigned char tmp = *data, ret = 0; | |
378 | ||
379 | /* | |
380 | * transform bits from aa.bbb.ccc to ccc.bbb.aa | |
381 | */ | |
7e041abf JP |
382 | ret |= (tmp & 0xc0) >> 6; |
383 | ret |= (tmp & 0x38) >> 1; | |
384 | ret |= (tmp & 0x07) << 5; | |
d54c2752 DS |
385 | *data = ret & 0xff; |
386 | #endif | |
387 | } | |
388 | ||
389 | static void swap_packet_bitfield_from_le(unsigned char *data) | |
390 | { | |
391 | #ifdef __BIG_ENDIAN_BITFIELD | |
392 | unsigned char tmp = *data, ret = 0; | |
393 | ||
394 | /* | |
395 | * transform bits from ccc.bbb.aa to aa.bbb.ccc | |
396 | */ | |
7e041abf JP |
397 | ret |= (tmp & 0xe0) >> 5; |
398 | ret |= (tmp & 0x1c) << 1; | |
399 | ret |= (tmp & 0x03) << 6; | |
d54c2752 DS |
400 | *data = ret & 0xff; |
401 | #endif | |
402 | } | |
403 | ||
93110f69 | 404 | static void do_send_fragment(struct ipw_hardware *hw, unsigned char *data, |
099dc4fb DS |
405 | unsigned length) |
406 | { | |
d4c0deb7 | 407 | unsigned i; |
099dc4fb DS |
408 | unsigned long flags; |
409 | ||
410 | start_timing(); | |
93110f69 | 411 | BUG_ON(length > hw->ll_mtu); |
099dc4fb DS |
412 | |
413 | if (ipwireless_debug) | |
414 | dump_data_bytes("send", data, length); | |
415 | ||
63c4dbd1 | 416 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 417 | |
eb4e545d | 418 | hw->tx_ready = 0; |
d54c2752 | 419 | swap_packet_bitfield_to_le(data); |
eb4e545d | 420 | |
099dc4fb DS |
421 | if (hw->hw_version == HW_VERSION_1) { |
422 | outw((unsigned short) length, hw->base_port + IODWR); | |
423 | ||
424 | for (i = 0; i < length; i += 2) { | |
425 | unsigned short d = data[i]; | |
426 | __le16 raw_data; | |
427 | ||
d4c0deb7 | 428 | if (i + 1 < length) |
099dc4fb DS |
429 | d |= data[i + 1] << 8; |
430 | raw_data = cpu_to_le16(d); | |
431 | outw(raw_data, hw->base_port + IODWR); | |
432 | } | |
433 | ||
434 | outw(DCR_TXDONE, hw->base_port + IODCR); | |
435 | } else if (hw->hw_version == HW_VERSION_2) { | |
2e713165 | 436 | outw((unsigned short) length, hw->base_port); |
099dc4fb DS |
437 | |
438 | for (i = 0; i < length; i += 2) { | |
439 | unsigned short d = data[i]; | |
440 | __le16 raw_data; | |
441 | ||
d4c0deb7 | 442 | if (i + 1 < length) |
099dc4fb DS |
443 | d |= data[i + 1] << 8; |
444 | raw_data = cpu_to_le16(d); | |
2e713165 | 445 | outw(raw_data, hw->base_port); |
099dc4fb DS |
446 | } |
447 | while ((i & 3) != 2) { | |
2e713165 | 448 | outw((unsigned short) 0xDEAD, hw->base_port); |
099dc4fb DS |
449 | i += 2; |
450 | } | |
451 | writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx); | |
452 | } | |
453 | ||
63c4dbd1 | 454 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
455 | |
456 | end_write_timing(length); | |
099dc4fb DS |
457 | } |
458 | ||
93110f69 | 459 | static void do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet) |
099dc4fb DS |
460 | { |
461 | unsigned short fragment_data_len; | |
462 | unsigned short data_left = packet->length - packet->offset; | |
463 | unsigned short header_size; | |
464 | union nl_packet pkt; | |
465 | ||
466 | header_size = | |
467 | (packet->fragment_count == 0) | |
468 | ? NL_FIRST_PACKET_HEADER_SIZE | |
469 | : NL_FOLLOWING_PACKET_HEADER_SIZE; | |
470 | fragment_data_len = hw->ll_mtu - header_size; | |
471 | if (data_left < fragment_data_len) | |
472 | fragment_data_len = data_left; | |
473 | ||
d54c2752 DS |
474 | /* |
475 | * hdr_first is now in machine bitfield order, which will be swapped | |
476 | * to le just before it goes to hw | |
477 | */ | |
099dc4fb DS |
478 | pkt.hdr_first.protocol = packet->protocol; |
479 | pkt.hdr_first.address = packet->dest_addr; | |
480 | pkt.hdr_first.packet_rank = 0; | |
481 | ||
482 | /* First packet? */ | |
483 | if (packet->fragment_count == 0) { | |
484 | pkt.hdr_first.packet_rank |= NL_FIRST_PACKET; | |
485 | pkt.hdr_first.length_lsb = (unsigned char) packet->length; | |
486 | pkt.hdr_first.length_msb = | |
487 | (unsigned char) (packet->length >> 8); | |
488 | } | |
489 | ||
490 | memcpy(pkt.rawpkt + header_size, | |
491 | ((unsigned char *) packet) + sizeof(struct ipw_tx_packet) + | |
492 | packet->offset, fragment_data_len); | |
493 | packet->offset += fragment_data_len; | |
494 | packet->fragment_count++; | |
495 | ||
496 | /* Last packet? (May also be first packet.) */ | |
497 | if (packet->offset == packet->length) | |
498 | pkt.hdr_first.packet_rank |= NL_LAST_PACKET; | |
499 | do_send_fragment(hw, pkt.rawpkt, header_size + fragment_data_len); | |
500 | ||
501 | /* If this packet has unsent data, then re-queue it. */ | |
502 | if (packet->offset < packet->length) { | |
503 | /* | |
504 | * Re-queue it at the head of the highest priority queue so | |
505 | * it goes before all other packets | |
506 | */ | |
507 | unsigned long flags; | |
508 | ||
63c4dbd1 | 509 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 510 | list_add(&packet->queue, &hw->tx_queue[0]); |
eb4e545d | 511 | hw->tx_queued++; |
63c4dbd1 | 512 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
513 | } else { |
514 | if (packet->packet_callback) | |
515 | packet->packet_callback(packet->callback_data, | |
516 | packet->length); | |
517 | kfree(packet); | |
518 | } | |
099dc4fb DS |
519 | } |
520 | ||
521 | static void ipw_setup_hardware(struct ipw_hardware *hw) | |
522 | { | |
523 | unsigned long flags; | |
524 | ||
63c4dbd1 | 525 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
526 | if (hw->hw_version == HW_VERSION_1) { |
527 | /* Reset RX FIFO */ | |
528 | outw(DCR_RXRESET, hw->base_port + IODCR); | |
529 | /* SB: Reset TX FIFO */ | |
530 | outw(DCR_TXRESET, hw->base_port + IODCR); | |
531 | ||
532 | /* Enable TX and RX interrupts. */ | |
533 | outw(IER_TXENABLED | IER_RXENABLED, hw->base_port + IOIER); | |
534 | } else { | |
535 | /* | |
536 | * Set INTRACK bit (bit 0), which means we must explicitly | |
537 | * acknowledge interrupts by clearing bit 2 of reg_config_and_status. | |
538 | */ | |
539 | unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); | |
540 | ||
541 | csr |= 1; | |
542 | writew(csr, &hw->memregs_CCR->reg_config_and_status); | |
543 | } | |
63c4dbd1 | 544 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
545 | } |
546 | ||
547 | /* | |
548 | * If 'packet' is NULL, then this function allocates a new packet, setting its | |
549 | * length to 0 and ensuring it has the specified minimum amount of free space. | |
550 | * | |
551 | * If 'packet' is not NULL, then this function enlarges it if it doesn't | |
552 | * have the specified minimum amount of free space. | |
553 | * | |
554 | */ | |
555 | static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw, | |
556 | struct ipw_rx_packet *packet, | |
557 | int minimum_free_space) | |
558 | { | |
559 | ||
560 | if (!packet) { | |
561 | unsigned long flags; | |
562 | ||
63c4dbd1 | 563 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
564 | if (!list_empty(&hw->rx_pool)) { |
565 | packet = list_first_entry(&hw->rx_pool, | |
566 | struct ipw_rx_packet, queue); | |
099dc4fb | 567 | hw->rx_pool_size--; |
63c4dbd1 | 568 | spin_unlock_irqrestore(&hw->lock, flags); |
0f38c47a | 569 | list_del(&packet->queue); |
099dc4fb | 570 | } else { |
a0138692 | 571 | const int min_capacity = |
3684a601 | 572 | ipwireless_ppp_mru(hw->network) + 2; |
099dc4fb DS |
573 | int new_capacity; |
574 | ||
63c4dbd1 | 575 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb | 576 | new_capacity = |
d4c0deb7 DS |
577 | (minimum_free_space > min_capacity |
578 | ? minimum_free_space | |
579 | : min_capacity); | |
099dc4fb DS |
580 | packet = kmalloc(sizeof(struct ipw_rx_packet) |
581 | + new_capacity, GFP_ATOMIC); | |
582 | if (!packet) | |
583 | return NULL; | |
584 | packet->capacity = new_capacity; | |
585 | } | |
586 | packet->length = 0; | |
587 | } | |
588 | ||
099dc4fb DS |
589 | if (packet->length + minimum_free_space > packet->capacity) { |
590 | struct ipw_rx_packet *old_packet = packet; | |
591 | ||
592 | packet = kmalloc(sizeof(struct ipw_rx_packet) + | |
593 | old_packet->length + minimum_free_space, | |
594 | GFP_ATOMIC); | |
43f77e91 DJ |
595 | if (!packet) { |
596 | kfree(old_packet); | |
099dc4fb | 597 | return NULL; |
43f77e91 | 598 | } |
099dc4fb DS |
599 | memcpy(packet, old_packet, |
600 | sizeof(struct ipw_rx_packet) | |
601 | + old_packet->length); | |
602 | packet->capacity = old_packet->length + minimum_free_space; | |
603 | kfree(old_packet); | |
604 | } | |
605 | ||
606 | return packet; | |
607 | } | |
608 | ||
609 | static void pool_free(struct ipw_hardware *hw, struct ipw_rx_packet *packet) | |
610 | { | |
611 | if (hw->rx_pool_size > 6) | |
612 | kfree(packet); | |
613 | else { | |
614 | hw->rx_pool_size++; | |
0f38c47a | 615 | list_add(&packet->queue, &hw->rx_pool); |
099dc4fb DS |
616 | } |
617 | } | |
618 | ||
619 | static void queue_received_packet(struct ipw_hardware *hw, | |
ff3e990e DS |
620 | unsigned int protocol, |
621 | unsigned int address, | |
622 | const unsigned char *data, int length, | |
623 | int is_last) | |
099dc4fb DS |
624 | { |
625 | unsigned int channel_idx = address - 1; | |
626 | struct ipw_rx_packet *packet = NULL; | |
627 | unsigned long flags; | |
628 | ||
629 | /* Discard packet if channel index is out of range. */ | |
630 | if (channel_idx >= NL_NUM_OF_ADDRESSES) { | |
631 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
632 | ": data packet has bad address %u\n", address); | |
633 | return; | |
634 | } | |
635 | ||
636 | /* | |
637 | * ->packet_assembler is safe to touch unlocked, this is the only place | |
638 | */ | |
639 | if (protocol == TL_PROTOCOLID_COM_DATA) { | |
640 | struct ipw_rx_packet **assem = | |
641 | &hw->packet_assembler[channel_idx]; | |
642 | ||
643 | /* | |
644 | * Create a new packet, or assembler already contains one | |
645 | * enlarge it by 'length' bytes. | |
646 | */ | |
647 | (*assem) = pool_allocate(hw, *assem, length); | |
648 | if (!(*assem)) { | |
649 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
d82603c6 | 650 | ": no memory for incoming data packet, dropped!\n"); |
099dc4fb DS |
651 | return; |
652 | } | |
653 | (*assem)->protocol = protocol; | |
654 | (*assem)->channel_idx = channel_idx; | |
655 | ||
656 | /* Append this packet data onto existing data. */ | |
657 | memcpy((unsigned char *)(*assem) + | |
658 | sizeof(struct ipw_rx_packet) | |
659 | + (*assem)->length, data, length); | |
660 | (*assem)->length += length; | |
661 | if (is_last) { | |
662 | packet = *assem; | |
663 | *assem = NULL; | |
664 | /* Count queued DATA bytes only */ | |
63c4dbd1 | 665 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 666 | hw->rx_bytes_queued += packet->length; |
63c4dbd1 | 667 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
668 | } |
669 | } else { | |
670 | /* If it's a CTRL packet, don't assemble, just queue it. */ | |
671 | packet = pool_allocate(hw, NULL, length); | |
672 | if (!packet) { | |
673 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
d82603c6 | 674 | ": no memory for incoming ctrl packet, dropped!\n"); |
099dc4fb DS |
675 | return; |
676 | } | |
677 | packet->protocol = protocol; | |
678 | packet->channel_idx = channel_idx; | |
679 | memcpy((unsigned char *)packet + sizeof(struct ipw_rx_packet), | |
680 | data, length); | |
681 | packet->length = length; | |
682 | } | |
683 | ||
684 | /* | |
685 | * If this is the last packet, then send the assembled packet on to the | |
686 | * network layer. | |
687 | */ | |
688 | if (packet) { | |
63c4dbd1 | 689 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
690 | list_add_tail(&packet->queue, &hw->rx_queue); |
691 | /* Block reception of incoming packets if queue is full. */ | |
692 | hw->blocking_rx = | |
d4c0deb7 | 693 | (hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE); |
099dc4fb | 694 | |
63c4dbd1 | 695 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
696 | schedule_work(&hw->work_rx); |
697 | } | |
698 | } | |
699 | ||
700 | /* | |
701 | * Workqueue callback | |
702 | */ | |
703 | static void ipw_receive_data_work(struct work_struct *work_rx) | |
704 | { | |
705 | struct ipw_hardware *hw = | |
706 | container_of(work_rx, struct ipw_hardware, work_rx); | |
707 | unsigned long flags; | |
708 | ||
63c4dbd1 | 709 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
710 | while (!list_empty(&hw->rx_queue)) { |
711 | struct ipw_rx_packet *packet = | |
712 | list_first_entry(&hw->rx_queue, | |
713 | struct ipw_rx_packet, queue); | |
714 | ||
715 | if (hw->shutting_down) | |
716 | break; | |
717 | list_del(&packet->queue); | |
718 | ||
719 | /* | |
720 | * Note: ipwireless_network_packet_received must be called in a | |
721 | * process context (i.e. via schedule_work) because the tty | |
722 | * output code can sleep in the tty_flip_buffer_push call. | |
723 | */ | |
724 | if (packet->protocol == TL_PROTOCOLID_COM_DATA) { | |
725 | if (hw->network != NULL) { | |
726 | /* If the network hasn't been disconnected. */ | |
63c4dbd1 | 727 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
728 | /* |
729 | * This must run unlocked due to tty processing | |
730 | * and mutex locking | |
731 | */ | |
732 | ipwireless_network_packet_received( | |
733 | hw->network, | |
734 | packet->channel_idx, | |
735 | (unsigned char *)packet | |
736 | + sizeof(struct ipw_rx_packet), | |
737 | packet->length); | |
63c4dbd1 | 738 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
739 | } |
740 | /* Count queued DATA bytes only */ | |
741 | hw->rx_bytes_queued -= packet->length; | |
742 | } else { | |
743 | /* | |
744 | * This is safe to be called locked, callchain does | |
745 | * not block | |
746 | */ | |
747 | handle_received_CTRL_packet(hw, packet->channel_idx, | |
748 | (unsigned char *)packet | |
749 | + sizeof(struct ipw_rx_packet), | |
750 | packet->length); | |
751 | } | |
752 | pool_free(hw, packet); | |
753 | /* | |
754 | * Unblock reception of incoming packets if queue is no longer | |
755 | * full. | |
756 | */ | |
757 | hw->blocking_rx = | |
758 | hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE; | |
759 | if (hw->shutting_down) | |
760 | break; | |
761 | } | |
63c4dbd1 | 762 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
763 | } |
764 | ||
765 | static void handle_received_CTRL_packet(struct ipw_hardware *hw, | |
766 | unsigned int channel_idx, | |
ff3e990e | 767 | const unsigned char *data, int len) |
099dc4fb | 768 | { |
ff3e990e DS |
769 | const struct ipw_control_packet_body *body = |
770 | (const struct ipw_control_packet_body *) data; | |
099dc4fb DS |
771 | unsigned int changed_mask; |
772 | ||
773 | if (len != sizeof(struct ipw_control_packet_body)) { | |
774 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
775 | ": control packet was %d bytes - wrong size!\n", | |
776 | len); | |
777 | return; | |
778 | } | |
779 | ||
780 | switch (body->sig_no) { | |
781 | case COMCTRL_CTS: | |
782 | changed_mask = IPW_CONTROL_LINE_CTS; | |
783 | break; | |
784 | case COMCTRL_DCD: | |
785 | changed_mask = IPW_CONTROL_LINE_DCD; | |
786 | break; | |
787 | case COMCTRL_DSR: | |
788 | changed_mask = IPW_CONTROL_LINE_DSR; | |
789 | break; | |
790 | case COMCTRL_RI: | |
791 | changed_mask = IPW_CONTROL_LINE_RI; | |
792 | break; | |
793 | default: | |
794 | changed_mask = 0; | |
795 | } | |
796 | ||
797 | if (changed_mask != 0) { | |
798 | if (body->value) | |
799 | hw->control_lines[channel_idx] |= changed_mask; | |
800 | else | |
801 | hw->control_lines[channel_idx] &= ~changed_mask; | |
802 | if (hw->network) | |
803 | ipwireless_network_notify_control_line_change( | |
804 | hw->network, | |
805 | channel_idx, | |
806 | hw->control_lines[channel_idx], | |
807 | changed_mask); | |
808 | } | |
809 | } | |
810 | ||
811 | static void handle_received_packet(struct ipw_hardware *hw, | |
ff3e990e | 812 | const union nl_packet *packet, |
099dc4fb DS |
813 | unsigned short len) |
814 | { | |
815 | unsigned int protocol = packet->hdr.protocol; | |
816 | unsigned int address = packet->hdr.address; | |
817 | unsigned int header_length; | |
ff3e990e | 818 | const unsigned char *data; |
099dc4fb DS |
819 | unsigned int data_len; |
820 | int is_last = packet->hdr.packet_rank & NL_LAST_PACKET; | |
821 | ||
822 | if (packet->hdr.packet_rank & NL_FIRST_PACKET) | |
823 | header_length = NL_FIRST_PACKET_HEADER_SIZE; | |
824 | else | |
825 | header_length = NL_FOLLOWING_PACKET_HEADER_SIZE; | |
826 | ||
827 | data = packet->rawpkt + header_length; | |
828 | data_len = len - header_length; | |
829 | switch (protocol) { | |
830 | case TL_PROTOCOLID_COM_DATA: | |
831 | case TL_PROTOCOLID_COM_CTRL: | |
832 | queue_received_packet(hw, protocol, address, data, data_len, | |
833 | is_last); | |
834 | break; | |
835 | case TL_PROTOCOLID_SETUP: | |
836 | handle_received_SETUP_packet(hw, address, data, data_len, | |
837 | is_last); | |
838 | break; | |
839 | } | |
840 | } | |
841 | ||
842 | static void acknowledge_data_read(struct ipw_hardware *hw) | |
843 | { | |
844 | if (hw->hw_version == HW_VERSION_1) | |
845 | outw(DCR_RXDONE, hw->base_port + IODCR); | |
846 | else | |
847 | writew(MEMRX_PCINTACKK, | |
848 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
849 | } | |
850 | ||
851 | /* | |
852 | * Retrieve a packet from the IPW hardware. | |
853 | */ | |
854 | static void do_receive_packet(struct ipw_hardware *hw) | |
855 | { | |
856 | unsigned len; | |
d4c0deb7 | 857 | unsigned i; |
099dc4fb DS |
858 | unsigned char pkt[LL_MTU_MAX]; |
859 | ||
860 | start_timing(); | |
861 | ||
862 | if (hw->hw_version == HW_VERSION_1) { | |
863 | len = inw(hw->base_port + IODRR); | |
864 | if (len > hw->ll_mtu) { | |
865 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 866 | ": received a packet of %u bytes - longer than the MTU!\n", len); |
099dc4fb DS |
867 | outw(DCR_RXDONE | DCR_RXRESET, hw->base_port + IODCR); |
868 | return; | |
869 | } | |
870 | ||
871 | for (i = 0; i < len; i += 2) { | |
872 | __le16 raw_data = inw(hw->base_port + IODRR); | |
873 | unsigned short data = le16_to_cpu(raw_data); | |
874 | ||
875 | pkt[i] = (unsigned char) data; | |
876 | pkt[i + 1] = (unsigned char) (data >> 8); | |
877 | } | |
878 | } else { | |
2e713165 | 879 | len = inw(hw->base_port); |
099dc4fb DS |
880 | if (len > hw->ll_mtu) { |
881 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
622e713e | 882 | ": received a packet of %u bytes - longer than the MTU!\n", len); |
099dc4fb DS |
883 | writew(MEMRX_PCINTACKK, |
884 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
885 | return; | |
886 | } | |
887 | ||
888 | for (i = 0; i < len; i += 2) { | |
2e713165 | 889 | __le16 raw_data = inw(hw->base_port); |
099dc4fb DS |
890 | unsigned short data = le16_to_cpu(raw_data); |
891 | ||
892 | pkt[i] = (unsigned char) data; | |
893 | pkt[i + 1] = (unsigned char) (data >> 8); | |
894 | } | |
895 | ||
896 | while ((i & 3) != 2) { | |
2e713165 | 897 | inw(hw->base_port); |
099dc4fb DS |
898 | i += 2; |
899 | } | |
900 | } | |
901 | ||
902 | acknowledge_data_read(hw); | |
903 | ||
d54c2752 DS |
904 | swap_packet_bitfield_from_le(pkt); |
905 | ||
099dc4fb DS |
906 | if (ipwireless_debug) |
907 | dump_data_bytes("recv", pkt, len); | |
908 | ||
909 | handle_received_packet(hw, (union nl_packet *) pkt, len); | |
910 | ||
911 | end_read_timing(len); | |
912 | } | |
913 | ||
914 | static int get_current_packet_priority(struct ipw_hardware *hw) | |
915 | { | |
916 | /* | |
917 | * If we're initializing, don't send anything of higher priority than | |
918 | * PRIO_SETUP. The network layer therefore need not care about | |
919 | * hardware initialization - any of its stuff will simply be queued | |
920 | * until setup is complete. | |
921 | */ | |
922 | return (hw->to_setup || hw->initializing | |
d4c0deb7 | 923 | ? PRIO_SETUP + 1 : NL_NUM_OF_PRIORITIES); |
099dc4fb DS |
924 | } |
925 | ||
926 | /* | |
927 | * return 1 if something has been received from hw | |
928 | */ | |
929 | static int get_packets_from_hw(struct ipw_hardware *hw) | |
930 | { | |
931 | int received = 0; | |
932 | unsigned long flags; | |
933 | ||
63c4dbd1 | 934 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
935 | while (hw->rx_ready && !hw->blocking_rx) { |
936 | received = 1; | |
937 | hw->rx_ready--; | |
63c4dbd1 | 938 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
939 | |
940 | do_receive_packet(hw); | |
941 | ||
63c4dbd1 | 942 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 943 | } |
63c4dbd1 | 944 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
945 | |
946 | return received; | |
947 | } | |
948 | ||
949 | /* | |
950 | * Send pending packet up to given priority, prioritize SETUP data until | |
951 | * hardware is fully setup. | |
952 | * | |
953 | * return 1 if more packets can be sent | |
954 | */ | |
955 | static int send_pending_packet(struct ipw_hardware *hw, int priority_limit) | |
956 | { | |
957 | int more_to_send = 0; | |
958 | unsigned long flags; | |
959 | ||
63c4dbd1 | 960 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 961 | if (hw->tx_queued && hw->tx_ready) { |
099dc4fb DS |
962 | int priority; |
963 | struct ipw_tx_packet *packet = NULL; | |
964 | ||
099dc4fb DS |
965 | /* Pick a packet */ |
966 | for (priority = 0; priority < priority_limit; priority++) { | |
967 | if (!list_empty(&hw->tx_queue[priority])) { | |
968 | packet = list_first_entry( | |
969 | &hw->tx_queue[priority], | |
970 | struct ipw_tx_packet, | |
971 | queue); | |
972 | ||
eb4e545d | 973 | hw->tx_queued--; |
099dc4fb DS |
974 | list_del(&packet->queue); |
975 | ||
976 | break; | |
977 | } | |
978 | } | |
979 | if (!packet) { | |
980 | hw->tx_queued = 0; | |
63c4dbd1 | 981 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
982 | return 0; |
983 | } | |
eb4e545d | 984 | |
63c4dbd1 | 985 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
986 | |
987 | /* Send */ | |
988 | do_send_packet(hw, packet); | |
989 | ||
990 | /* Check if more to send */ | |
63c4dbd1 | 991 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
992 | for (priority = 0; priority < priority_limit; priority++) |
993 | if (!list_empty(&hw->tx_queue[priority])) { | |
994 | more_to_send = 1; | |
995 | break; | |
996 | } | |
997 | ||
998 | if (!more_to_send) | |
999 | hw->tx_queued = 0; | |
1000 | } | |
63c4dbd1 | 1001 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1002 | |
1003 | return more_to_send; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Send and receive all queued packets. | |
1008 | */ | |
a42a9f6a | 1009 | static void ipwireless_do_tasklet(struct tasklet_struct *t) |
099dc4fb | 1010 | { |
a42a9f6a | 1011 | struct ipw_hardware *hw = from_tasklet(hw, t, tasklet); |
099dc4fb DS |
1012 | unsigned long flags; |
1013 | ||
63c4dbd1 | 1014 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1015 | if (hw->shutting_down) { |
63c4dbd1 | 1016 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1017 | return; |
1018 | } | |
1019 | ||
1020 | if (hw->to_setup == 1) { | |
1021 | /* | |
1022 | * Initial setup data sent to hardware | |
1023 | */ | |
1024 | hw->to_setup = 2; | |
63c4dbd1 | 1025 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1026 | |
1027 | ipw_setup_hardware(hw); | |
1028 | ipw_send_setup_packet(hw); | |
1029 | ||
1030 | send_pending_packet(hw, PRIO_SETUP + 1); | |
1031 | get_packets_from_hw(hw); | |
1032 | } else { | |
1033 | int priority_limit = get_current_packet_priority(hw); | |
1034 | int again; | |
1035 | ||
63c4dbd1 | 1036 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1037 | |
1038 | do { | |
1039 | again = send_pending_packet(hw, priority_limit); | |
1040 | again |= get_packets_from_hw(hw); | |
1041 | } while (again); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * return true if the card is physically present. | |
1047 | */ | |
1048 | static int is_card_present(struct ipw_hardware *hw) | |
1049 | { | |
1050 | if (hw->hw_version == HW_VERSION_1) | |
1051 | return inw(hw->base_port + IOIR) != 0xFFFF; | |
1052 | else | |
1053 | return readl(&hw->memory_info_regs->memreg_card_present) == | |
1054 | CARD_PRESENT_VALUE; | |
1055 | } | |
1056 | ||
1057 | static irqreturn_t ipwireless_handle_v1_interrupt(int irq, | |
1058 | struct ipw_hardware *hw) | |
1059 | { | |
1060 | unsigned short irqn; | |
1061 | ||
1062 | irqn = inw(hw->base_port + IOIR); | |
1063 | ||
1064 | /* Check if card is present */ | |
1065 | if (irqn == 0xFFFF) | |
1066 | return IRQ_NONE; | |
1067 | else if (irqn != 0) { | |
1068 | unsigned short ack = 0; | |
1069 | unsigned long flags; | |
1070 | ||
1071 | /* Transmit complete. */ | |
1072 | if (irqn & IR_TXINTR) { | |
1073 | ack |= IR_TXINTR; | |
63c4dbd1 | 1074 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 1075 | hw->tx_ready = 1; |
63c4dbd1 | 1076 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1077 | } |
1078 | /* Received data */ | |
1079 | if (irqn & IR_RXINTR) { | |
1080 | ack |= IR_RXINTR; | |
63c4dbd1 | 1081 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1082 | hw->rx_ready++; |
63c4dbd1 | 1083 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1084 | } |
1085 | if (ack != 0) { | |
1086 | outw(ack, hw->base_port + IOIR); | |
1087 | tasklet_schedule(&hw->tasklet); | |
1088 | } | |
1089 | return IRQ_HANDLED; | |
1090 | } | |
1091 | return IRQ_NONE; | |
1092 | } | |
1093 | ||
1094 | static void acknowledge_pcmcia_interrupt(struct ipw_hardware *hw) | |
1095 | { | |
1096 | unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); | |
1097 | ||
1098 | csr &= 0xfffd; | |
1099 | writew(csr, &hw->memregs_CCR->reg_config_and_status); | |
1100 | } | |
1101 | ||
1102 | static irqreturn_t ipwireless_handle_v2_v3_interrupt(int irq, | |
1103 | struct ipw_hardware *hw) | |
1104 | { | |
1105 | int tx = 0; | |
1106 | int rx = 0; | |
1107 | int rx_repeat = 0; | |
1108 | int try_mem_tx_old; | |
1109 | unsigned long flags; | |
1110 | ||
1111 | do { | |
1112 | ||
1113 | unsigned short memtx = readw(hw->memreg_tx); | |
1114 | unsigned short memtx_serial; | |
1115 | unsigned short memrxdone = | |
1116 | readw(&hw->memory_info_regs->memreg_rx_done); | |
1117 | ||
1118 | try_mem_tx_old = 0; | |
1119 | ||
1120 | /* check whether the interrupt was generated by ipwireless card */ | |
1121 | if (!(memtx & MEMTX_TX) && !(memrxdone & MEMRX_RX_DONE)) { | |
1122 | ||
1123 | /* check if the card uses memreg_tx_old register */ | |
1124 | if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1125 | memtx = readw(&hw->memory_info_regs->memreg_tx_old); | |
1126 | if (memtx & MEMTX_TX) { | |
1127 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1128 | ": Using memreg_tx_old\n"); | |
1129 | hw->memreg_tx = | |
1130 | &hw->memory_info_regs->memreg_tx_old; | |
1131 | } else { | |
1132 | return IRQ_NONE; | |
1133 | } | |
d4c0deb7 | 1134 | } else |
099dc4fb | 1135 | return IRQ_NONE; |
099dc4fb DS |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * See if the card is physically present. Note that while it is | |
1140 | * powering up, it appears not to be present. | |
1141 | */ | |
1142 | if (!is_card_present(hw)) { | |
1143 | acknowledge_pcmcia_interrupt(hw); | |
1144 | return IRQ_HANDLED; | |
1145 | } | |
1146 | ||
1147 | memtx_serial = memtx & (unsigned short) 0xff00; | |
1148 | if (memtx & MEMTX_TX) { | |
1149 | writew(memtx_serial, hw->memreg_tx); | |
1150 | ||
1151 | if (hw->serial_number_detected) { | |
1152 | if (memtx_serial != hw->last_memtx_serial) { | |
1153 | hw->last_memtx_serial = memtx_serial; | |
63c4dbd1 | 1154 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1155 | hw->rx_ready++; |
63c4dbd1 | 1156 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1157 | rx = 1; |
1158 | } else | |
1159 | /* Ignore 'Timer Recovery' duplicates. */ | |
1160 | rx_repeat = 1; | |
1161 | } else { | |
1162 | /* | |
1163 | * If a non-zero serial number is seen, then enable | |
1164 | * serial number checking. | |
1165 | */ | |
1166 | if (memtx_serial != 0) { | |
1167 | hw->serial_number_detected = 1; | |
1168 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1169 | ": memreg_tx serial num detected\n"); | |
1170 | ||
63c4dbd1 | 1171 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1172 | hw->rx_ready++; |
63c4dbd1 | 1173 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1174 | } |
1175 | rx = 1; | |
1176 | } | |
1177 | } | |
1178 | if (memrxdone & MEMRX_RX_DONE) { | |
1179 | writew(0, &hw->memory_info_regs->memreg_rx_done); | |
63c4dbd1 | 1180 | spin_lock_irqsave(&hw->lock, flags); |
eb4e545d | 1181 | hw->tx_ready = 1; |
63c4dbd1 | 1182 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1183 | tx = 1; |
1184 | } | |
1185 | if (tx) | |
1186 | writew(MEMRX_PCINTACKK, | |
1187 | &hw->memory_info_regs->memreg_pc_interrupt_ack); | |
1188 | ||
1189 | acknowledge_pcmcia_interrupt(hw); | |
1190 | ||
1191 | if (tx || rx) | |
1192 | tasklet_schedule(&hw->tasklet); | |
1193 | else if (!rx_repeat) { | |
1194 | if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1195 | if (hw->serial_number_detected) | |
1196 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
1197 | ": spurious interrupt - new_tx mode\n"); | |
1198 | else { | |
1199 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
622e713e | 1200 | ": no valid memreg_tx value - switching to the old memreg_tx\n"); |
099dc4fb DS |
1201 | hw->memreg_tx = |
1202 | &hw->memory_info_regs->memreg_tx_old; | |
1203 | try_mem_tx_old = 1; | |
1204 | } | |
1205 | } else | |
1206 | printk(KERN_WARNING IPWIRELESS_PCCARD_NAME | |
1207 | ": spurious interrupt - old_tx mode\n"); | |
1208 | } | |
1209 | ||
1210 | } while (try_mem_tx_old == 1); | |
1211 | ||
1212 | return IRQ_HANDLED; | |
1213 | } | |
1214 | ||
2fc5577e | 1215 | irqreturn_t ipwireless_interrupt(int irq, void *dev_id) |
099dc4fb | 1216 | { |
5fa9167a | 1217 | struct ipw_dev *ipw = dev_id; |
099dc4fb | 1218 | |
5fa9167a DB |
1219 | if (ipw->hardware->hw_version == HW_VERSION_1) |
1220 | return ipwireless_handle_v1_interrupt(irq, ipw->hardware); | |
099dc4fb | 1221 | else |
5fa9167a | 1222 | return ipwireless_handle_v2_v3_interrupt(irq, ipw->hardware); |
099dc4fb DS |
1223 | } |
1224 | ||
1225 | static void flush_packets_to_hw(struct ipw_hardware *hw) | |
1226 | { | |
1227 | int priority_limit; | |
1228 | unsigned long flags; | |
1229 | ||
63c4dbd1 | 1230 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1231 | priority_limit = get_current_packet_priority(hw); |
63c4dbd1 | 1232 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1233 | |
1234 | while (send_pending_packet(hw, priority_limit)); | |
1235 | } | |
1236 | ||
1237 | static void send_packet(struct ipw_hardware *hw, int priority, | |
1238 | struct ipw_tx_packet *packet) | |
1239 | { | |
1240 | unsigned long flags; | |
1241 | ||
63c4dbd1 | 1242 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb | 1243 | list_add_tail(&packet->queue, &hw->tx_queue[priority]); |
eb4e545d | 1244 | hw->tx_queued++; |
63c4dbd1 | 1245 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1246 | |
1247 | flush_packets_to_hw(hw); | |
1248 | } | |
1249 | ||
1250 | /* Create data packet, non-atomic allocation */ | |
1251 | static void *alloc_data_packet(int data_size, | |
1252 | unsigned char dest_addr, | |
1253 | unsigned char protocol) | |
1254 | { | |
1255 | struct ipw_tx_packet *packet = kzalloc( | |
1256 | sizeof(struct ipw_tx_packet) + data_size, | |
1257 | GFP_ATOMIC); | |
1258 | ||
1259 | if (!packet) | |
1260 | return NULL; | |
1261 | ||
1262 | INIT_LIST_HEAD(&packet->queue); | |
1263 | packet->dest_addr = dest_addr; | |
1264 | packet->protocol = protocol; | |
1265 | packet->length = data_size; | |
1266 | ||
1267 | return packet; | |
1268 | } | |
1269 | ||
1270 | static void *alloc_ctrl_packet(int header_size, | |
1271 | unsigned char dest_addr, | |
1272 | unsigned char protocol, | |
1273 | unsigned char sig_no) | |
1274 | { | |
1275 | /* | |
1276 | * sig_no is located right after ipw_tx_packet struct in every | |
1277 | * CTRL or SETUP packets, we can use ipw_control_packet as a | |
1278 | * common struct | |
1279 | */ | |
1280 | struct ipw_control_packet *packet = kzalloc(header_size, GFP_ATOMIC); | |
1281 | ||
1282 | if (!packet) | |
1283 | return NULL; | |
1284 | ||
1285 | INIT_LIST_HEAD(&packet->header.queue); | |
1286 | packet->header.dest_addr = dest_addr; | |
1287 | packet->header.protocol = protocol; | |
1288 | packet->header.length = header_size - sizeof(struct ipw_tx_packet); | |
1289 | packet->body.sig_no = sig_no; | |
1290 | ||
1291 | return packet; | |
1292 | } | |
1293 | ||
1294 | int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx, | |
ff3e990e | 1295 | const unsigned char *data, unsigned int length, |
099dc4fb DS |
1296 | void (*callback) (void *cb, unsigned int length), |
1297 | void *callback_data) | |
1298 | { | |
1299 | struct ipw_tx_packet *packet; | |
1300 | ||
d4c0deb7 DS |
1301 | packet = alloc_data_packet(length, (channel_idx + 1), |
1302 | TL_PROTOCOLID_COM_DATA); | |
099dc4fb DS |
1303 | if (!packet) |
1304 | return -ENOMEM; | |
1305 | packet->packet_callback = callback; | |
1306 | packet->callback_data = callback_data; | |
d4c0deb7 DS |
1307 | memcpy((unsigned char *) packet + sizeof(struct ipw_tx_packet), data, |
1308 | length); | |
099dc4fb DS |
1309 | |
1310 | send_packet(hw, PRIO_DATA, packet); | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int set_control_line(struct ipw_hardware *hw, int prio, | |
1315 | unsigned int channel_idx, int line, int state) | |
1316 | { | |
1317 | struct ipw_control_packet *packet; | |
1318 | int protocolid = TL_PROTOCOLID_COM_CTRL; | |
1319 | ||
1320 | if (prio == PRIO_SETUP) | |
1321 | protocolid = TL_PROTOCOLID_SETUP; | |
1322 | ||
1323 | packet = alloc_ctrl_packet(sizeof(struct ipw_control_packet), | |
d4c0deb7 | 1324 | (channel_idx + 1), protocolid, line); |
099dc4fb DS |
1325 | if (!packet) |
1326 | return -ENOMEM; | |
1327 | packet->header.length = sizeof(struct ipw_control_packet_body); | |
d4c0deb7 | 1328 | packet->body.value = (state == 0 ? 0 : 1); |
099dc4fb DS |
1329 | send_packet(hw, prio, &packet->header); |
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | ||
1334 | static int set_DTR(struct ipw_hardware *hw, int priority, | |
1335 | unsigned int channel_idx, int state) | |
1336 | { | |
1337 | if (state != 0) | |
1338 | hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_DTR; | |
1339 | else | |
1340 | hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_DTR; | |
1341 | ||
1342 | return set_control_line(hw, priority, channel_idx, COMCTRL_DTR, state); | |
1343 | } | |
1344 | ||
1345 | static int set_RTS(struct ipw_hardware *hw, int priority, | |
1346 | unsigned int channel_idx, int state) | |
1347 | { | |
1348 | if (state != 0) | |
1349 | hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_RTS; | |
1350 | else | |
1351 | hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_RTS; | |
1352 | ||
1353 | return set_control_line(hw, priority, channel_idx, COMCTRL_RTS, state); | |
1354 | } | |
1355 | ||
1356 | int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx, | |
1357 | int state) | |
1358 | { | |
1359 | return set_DTR(hw, PRIO_CTRL, channel_idx, state); | |
1360 | } | |
1361 | ||
1362 | int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx, | |
1363 | int state) | |
1364 | { | |
1365 | return set_RTS(hw, PRIO_CTRL, channel_idx, state); | |
1366 | } | |
1367 | ||
1368 | struct ipw_setup_get_version_query_packet { | |
1369 | struct ipw_tx_packet header; | |
1370 | struct tl_setup_get_version_qry body; | |
1371 | }; | |
1372 | ||
1373 | struct ipw_setup_config_packet { | |
1374 | struct ipw_tx_packet header; | |
1375 | struct tl_setup_config_msg body; | |
1376 | }; | |
1377 | ||
1378 | struct ipw_setup_config_done_packet { | |
1379 | struct ipw_tx_packet header; | |
1380 | struct tl_setup_config_done_msg body; | |
1381 | }; | |
1382 | ||
1383 | struct ipw_setup_open_packet { | |
1384 | struct ipw_tx_packet header; | |
1385 | struct tl_setup_open_msg body; | |
1386 | }; | |
1387 | ||
1388 | struct ipw_setup_info_packet { | |
1389 | struct ipw_tx_packet header; | |
1390 | struct tl_setup_info_msg body; | |
1391 | }; | |
1392 | ||
1393 | struct ipw_setup_reboot_msg_ack { | |
1394 | struct ipw_tx_packet header; | |
1395 | struct TlSetupRebootMsgAck body; | |
1396 | }; | |
1397 | ||
1398 | /* This handles the actual initialization of the card */ | |
1399 | static void __handle_setup_get_version_rsp(struct ipw_hardware *hw) | |
1400 | { | |
1401 | struct ipw_setup_config_packet *config_packet; | |
1402 | struct ipw_setup_config_done_packet *config_done_packet; | |
1403 | struct ipw_setup_open_packet *open_packet; | |
1404 | struct ipw_setup_info_packet *info_packet; | |
1405 | int port; | |
1406 | unsigned int channel_idx; | |
1407 | ||
1408 | /* generate config packet */ | |
1409 | for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { | |
1410 | config_packet = alloc_ctrl_packet( | |
1411 | sizeof(struct ipw_setup_config_packet), | |
1412 | ADDR_SETUP_PROT, | |
1413 | TL_PROTOCOLID_SETUP, | |
1414 | TL_SETUP_SIGNO_CONFIG_MSG); | |
1415 | if (!config_packet) | |
1416 | goto exit_nomem; | |
1417 | config_packet->header.length = sizeof(struct tl_setup_config_msg); | |
1418 | config_packet->body.port_no = port; | |
1419 | config_packet->body.prio_data = PRIO_DATA; | |
1420 | config_packet->body.prio_ctrl = PRIO_CTRL; | |
1421 | send_packet(hw, PRIO_SETUP, &config_packet->header); | |
1422 | } | |
1423 | config_done_packet = alloc_ctrl_packet( | |
1424 | sizeof(struct ipw_setup_config_done_packet), | |
1425 | ADDR_SETUP_PROT, | |
1426 | TL_PROTOCOLID_SETUP, | |
1427 | TL_SETUP_SIGNO_CONFIG_DONE_MSG); | |
1428 | if (!config_done_packet) | |
1429 | goto exit_nomem; | |
1430 | config_done_packet->header.length = sizeof(struct tl_setup_config_done_msg); | |
1431 | send_packet(hw, PRIO_SETUP, &config_done_packet->header); | |
1432 | ||
1433 | /* generate open packet */ | |
1434 | for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { | |
1435 | open_packet = alloc_ctrl_packet( | |
1436 | sizeof(struct ipw_setup_open_packet), | |
1437 | ADDR_SETUP_PROT, | |
1438 | TL_PROTOCOLID_SETUP, | |
1439 | TL_SETUP_SIGNO_OPEN_MSG); | |
1440 | if (!open_packet) | |
1441 | goto exit_nomem; | |
1442 | open_packet->header.length = sizeof(struct tl_setup_open_msg); | |
1443 | open_packet->body.port_no = port; | |
1444 | send_packet(hw, PRIO_SETUP, &open_packet->header); | |
1445 | } | |
1446 | for (channel_idx = 0; | |
1447 | channel_idx < NL_NUM_OF_ADDRESSES; channel_idx++) { | |
1448 | int ret; | |
1449 | ||
1450 | ret = set_DTR(hw, PRIO_SETUP, channel_idx, | |
1451 | (hw->control_lines[channel_idx] & | |
1452 | IPW_CONTROL_LINE_DTR) != 0); | |
1453 | if (ret) { | |
1454 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1455 | ": error setting DTR (%d)\n", ret); | |
1456 | return; | |
1457 | } | |
1458 | ||
52df3d5b | 1459 | ret = set_RTS(hw, PRIO_SETUP, channel_idx, |
099dc4fb DS |
1460 | (hw->control_lines [channel_idx] & |
1461 | IPW_CONTROL_LINE_RTS) != 0); | |
1462 | if (ret) { | |
1463 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1464 | ": error setting RTS (%d)\n", ret); | |
1465 | return; | |
1466 | } | |
1467 | } | |
1468 | /* | |
1469 | * For NDIS we assume that we are using sync PPP frames, for COM async. | |
1470 | * This driver uses NDIS mode too. We don't bother with translation | |
1471 | * from async -> sync PPP. | |
1472 | */ | |
1473 | info_packet = alloc_ctrl_packet(sizeof(struct ipw_setup_info_packet), | |
1474 | ADDR_SETUP_PROT, | |
1475 | TL_PROTOCOLID_SETUP, | |
1476 | TL_SETUP_SIGNO_INFO_MSG); | |
1477 | if (!info_packet) | |
1478 | goto exit_nomem; | |
1479 | info_packet->header.length = sizeof(struct tl_setup_info_msg); | |
1480 | info_packet->body.driver_type = NDISWAN_DRIVER; | |
1481 | info_packet->body.major_version = NDISWAN_DRIVER_MAJOR_VERSION; | |
1482 | info_packet->body.minor_version = NDISWAN_DRIVER_MINOR_VERSION; | |
1483 | send_packet(hw, PRIO_SETUP, &info_packet->header); | |
1484 | ||
1485 | /* Initialization is now complete, so we clear the 'to_setup' flag */ | |
1486 | hw->to_setup = 0; | |
1487 | ||
1488 | return; | |
1489 | ||
1490 | exit_nomem: | |
1491 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
1492 | ": not enough memory to alloc control packet\n"); | |
1493 | hw->to_setup = -1; | |
1494 | } | |
1495 | ||
1496 | static void handle_setup_get_version_rsp(struct ipw_hardware *hw, | |
1497 | unsigned char vers_no) | |
1498 | { | |
1499 | del_timer(&hw->setup_timer); | |
1500 | hw->initializing = 0; | |
1501 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": card is ready.\n"); | |
1502 | ||
1503 | if (vers_no == TL_SETUP_VERSION) | |
1504 | __handle_setup_get_version_rsp(hw); | |
1505 | else | |
622e713e | 1506 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME |
099dc4fb DS |
1507 | ": invalid hardware version no %u\n", |
1508 | (unsigned int) vers_no); | |
1509 | } | |
1510 | ||
1511 | static void ipw_send_setup_packet(struct ipw_hardware *hw) | |
1512 | { | |
1513 | struct ipw_setup_get_version_query_packet *ver_packet; | |
1514 | ||
1515 | ver_packet = alloc_ctrl_packet( | |
1516 | sizeof(struct ipw_setup_get_version_query_packet), | |
1517 | ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, | |
1518 | TL_SETUP_SIGNO_GET_VERSION_QRY); | |
7dd50e20 Y |
1519 | if (!ver_packet) |
1520 | return; | |
099dc4fb DS |
1521 | ver_packet->header.length = sizeof(struct tl_setup_get_version_qry); |
1522 | ||
1523 | /* | |
1524 | * Response is handled in handle_received_SETUP_packet | |
1525 | */ | |
1526 | send_packet(hw, PRIO_SETUP, &ver_packet->header); | |
1527 | } | |
1528 | ||
1529 | static void handle_received_SETUP_packet(struct ipw_hardware *hw, | |
1530 | unsigned int address, | |
ff3e990e | 1531 | const unsigned char *data, int len, |
099dc4fb DS |
1532 | int is_last) |
1533 | { | |
ff3e990e | 1534 | const union ipw_setup_rx_msg *rx_msg = (const union ipw_setup_rx_msg *) data; |
099dc4fb DS |
1535 | |
1536 | if (address != ADDR_SETUP_PROT) { | |
1537 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1538 | ": setup packet has bad address %d\n", address); | |
1539 | return; | |
1540 | } | |
1541 | ||
1542 | switch (rx_msg->sig_no) { | |
1543 | case TL_SETUP_SIGNO_GET_VERSION_RSP: | |
1544 | if (hw->to_setup) | |
1545 | handle_setup_get_version_rsp(hw, | |
1546 | rx_msg->version_rsp_msg.version); | |
1547 | break; | |
1548 | ||
1549 | case TL_SETUP_SIGNO_OPEN_MSG: | |
1550 | if (ipwireless_debug) { | |
1551 | unsigned int channel_idx = rx_msg->open_msg.port_no - 1; | |
1552 | ||
1553 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1554 | ": OPEN_MSG [channel %u] reply received\n", | |
1555 | channel_idx); | |
1556 | } | |
1557 | break; | |
1558 | ||
1559 | case TL_SETUP_SIGNO_INFO_MSG_ACK: | |
1560 | if (ipwireless_debug) | |
1561 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1562 | ": card successfully configured as NDISWAN\n"); | |
1563 | break; | |
1564 | ||
1565 | case TL_SETUP_SIGNO_REBOOT_MSG: | |
1566 | if (hw->to_setup) | |
1567 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1568 | ": Setup not completed - ignoring reboot msg\n"); | |
1569 | else { | |
1570 | struct ipw_setup_reboot_msg_ack *packet; | |
1571 | ||
1572 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
1573 | ": Acknowledging REBOOT message\n"); | |
1574 | packet = alloc_ctrl_packet( | |
1575 | sizeof(struct ipw_setup_reboot_msg_ack), | |
1576 | ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, | |
1577 | TL_SETUP_SIGNO_REBOOT_MSG_ACK); | |
76bbdcb3 SM |
1578 | if (!packet) { |
1579 | pr_err(IPWIRELESS_PCCARD_NAME | |
1580 | ": Not enough memory to send reboot packet"); | |
1581 | break; | |
1582 | } | |
099dc4fb DS |
1583 | packet->header.length = |
1584 | sizeof(struct TlSetupRebootMsgAck); | |
1585 | send_packet(hw, PRIO_SETUP, &packet->header); | |
1586 | if (hw->reboot_callback) | |
1587 | hw->reboot_callback(hw->reboot_callback_data); | |
1588 | } | |
1589 | break; | |
1590 | ||
1591 | default: | |
1592 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1593 | ": unknown setup message %u received\n", | |
1594 | (unsigned int) rx_msg->sig_no); | |
1595 | } | |
1596 | } | |
1597 | ||
1598 | static void do_close_hardware(struct ipw_hardware *hw) | |
1599 | { | |
1600 | unsigned int irqn; | |
1601 | ||
1602 | if (hw->hw_version == HW_VERSION_1) { | |
1603 | /* Disable TX and RX interrupts. */ | |
1604 | outw(0, hw->base_port + IOIER); | |
1605 | ||
1606 | /* Acknowledge any outstanding interrupt requests */ | |
1607 | irqn = inw(hw->base_port + IOIR); | |
1608 | if (irqn & IR_TXINTR) | |
1609 | outw(IR_TXINTR, hw->base_port + IOIR); | |
1610 | if (irqn & IR_RXINTR) | |
1611 | outw(IR_RXINTR, hw->base_port + IOIR); | |
1612 | ||
1613 | synchronize_irq(hw->irq); | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | struct ipw_hardware *ipwireless_hardware_create(void) | |
1618 | { | |
1619 | int i; | |
1620 | struct ipw_hardware *hw = | |
1621 | kzalloc(sizeof(struct ipw_hardware), GFP_KERNEL); | |
1622 | ||
1623 | if (!hw) | |
1624 | return NULL; | |
1625 | ||
1626 | hw->irq = -1; | |
1627 | hw->initializing = 1; | |
1628 | hw->tx_ready = 1; | |
1629 | hw->rx_bytes_queued = 0; | |
1630 | hw->rx_pool_size = 0; | |
1631 | hw->last_memtx_serial = (unsigned short) 0xffff; | |
1632 | for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) | |
1633 | INIT_LIST_HEAD(&hw->tx_queue[i]); | |
1634 | ||
1635 | INIT_LIST_HEAD(&hw->rx_queue); | |
1636 | INIT_LIST_HEAD(&hw->rx_pool); | |
63c4dbd1 | 1637 | spin_lock_init(&hw->lock); |
a42a9f6a | 1638 | tasklet_setup(&hw->tasklet, ipwireless_do_tasklet); |
099dc4fb | 1639 | INIT_WORK(&hw->work_rx, ipw_receive_data_work); |
e99e88a9 | 1640 | timer_setup(&hw->setup_timer, ipwireless_setup_timer, 0); |
099dc4fb DS |
1641 | |
1642 | return hw; | |
1643 | } | |
1644 | ||
1645 | void ipwireless_init_hardware_v1(struct ipw_hardware *hw, | |
1646 | unsigned int base_port, | |
1647 | void __iomem *attr_memory, | |
1648 | void __iomem *common_memory, | |
1649 | int is_v2_card, | |
1650 | void (*reboot_callback) (void *data), | |
1651 | void *reboot_callback_data) | |
1652 | { | |
1653 | if (hw->removed) { | |
1654 | hw->removed = 0; | |
1655 | enable_irq(hw->irq); | |
1656 | } | |
1657 | hw->base_port = base_port; | |
d4c0deb7 DS |
1658 | hw->hw_version = (is_v2_card ? HW_VERSION_2 : HW_VERSION_1); |
1659 | hw->ll_mtu = (hw->hw_version == HW_VERSION_1 ? LL_MTU_V1 : LL_MTU_V2); | |
099dc4fb DS |
1660 | hw->memregs_CCR = (struct MEMCCR __iomem *) |
1661 | ((unsigned short __iomem *) attr_memory + 0x200); | |
1662 | hw->memory_info_regs = (struct MEMINFREG __iomem *) common_memory; | |
1663 | hw->memreg_tx = &hw->memory_info_regs->memreg_tx_new; | |
1664 | hw->reboot_callback = reboot_callback; | |
1665 | hw->reboot_callback_data = reboot_callback_data; | |
1666 | } | |
1667 | ||
1668 | void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw) | |
1669 | { | |
1670 | hw->initializing = 1; | |
1671 | hw->init_loops = 0; | |
1672 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1673 | ": waiting for card to start up...\n"); | |
e99e88a9 | 1674 | ipwireless_setup_timer(&hw->setup_timer); |
099dc4fb DS |
1675 | } |
1676 | ||
e99e88a9 | 1677 | static void ipwireless_setup_timer(struct timer_list *t) |
099dc4fb | 1678 | { |
e99e88a9 | 1679 | struct ipw_hardware *hw = from_timer(hw, t, setup_timer); |
099dc4fb DS |
1680 | |
1681 | hw->init_loops++; | |
1682 | ||
1683 | if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY && | |
1684 | hw->hw_version == HW_VERSION_2 && | |
1685 | hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { | |
1686 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1687 | ": failed to startup using TX2, trying TX\n"); | |
1688 | ||
1689 | hw->memreg_tx = &hw->memory_info_regs->memreg_tx_old; | |
1690 | hw->init_loops = 0; | |
1691 | } | |
1692 | /* Give up after a certain number of retries */ | |
1693 | if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY) { | |
1694 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
1695 | ": card failed to start up!\n"); | |
1696 | hw->initializing = 0; | |
1697 | } else { | |
1698 | /* Do not attempt to write to the board if it is not present. */ | |
1699 | if (is_card_present(hw)) { | |
1700 | unsigned long flags; | |
1701 | ||
63c4dbd1 | 1702 | spin_lock_irqsave(&hw->lock, flags); |
099dc4fb DS |
1703 | hw->to_setup = 1; |
1704 | hw->tx_ready = 1; | |
63c4dbd1 | 1705 | spin_unlock_irqrestore(&hw->lock, flags); |
099dc4fb DS |
1706 | tasklet_schedule(&hw->tasklet); |
1707 | } | |
1708 | ||
1709 | mod_timer(&hw->setup_timer, | |
1710 | jiffies + msecs_to_jiffies(TL_SETUP_VERSION_QRY_TMO)); | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * Stop any interrupts from executing so that, once this function returns, | |
1716 | * other layers of the driver can be sure they won't get any more callbacks. | |
1717 | * Thus must be called on a proper process context. | |
1718 | */ | |
1719 | void ipwireless_stop_interrupts(struct ipw_hardware *hw) | |
1720 | { | |
1721 | if (!hw->shutting_down) { | |
1722 | /* Tell everyone we are going down. */ | |
1723 | hw->shutting_down = 1; | |
1724 | del_timer(&hw->setup_timer); | |
1725 | ||
1726 | /* Prevent the hardware from sending any more interrupts */ | |
1727 | do_close_hardware(hw); | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | void ipwireless_hardware_free(struct ipw_hardware *hw) | |
1732 | { | |
1733 | int i; | |
1734 | struct ipw_rx_packet *rp, *rq; | |
1735 | struct ipw_tx_packet *tp, *tq; | |
1736 | ||
1737 | ipwireless_stop_interrupts(hw); | |
1738 | ||
43829731 | 1739 | flush_work(&hw->work_rx); |
099dc4fb DS |
1740 | |
1741 | for (i = 0; i < NL_NUM_OF_ADDRESSES; i++) | |
f3c8279d | 1742 | kfree(hw->packet_assembler[i]); |
099dc4fb DS |
1743 | |
1744 | for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) | |
1745 | list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) { | |
1746 | list_del(&tp->queue); | |
1747 | kfree(tp); | |
1748 | } | |
1749 | ||
1750 | list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) { | |
1751 | list_del(&rp->queue); | |
1752 | kfree(rp); | |
1753 | } | |
1754 | ||
1755 | list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) { | |
1756 | list_del(&rp->queue); | |
1757 | kfree(rp); | |
1758 | } | |
1759 | kfree(hw); | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * Associate the specified network with this hardware, so it will receive events | |
1764 | * from it. | |
1765 | */ | |
1766 | void ipwireless_associate_network(struct ipw_hardware *hw, | |
1767 | struct ipw_network *network) | |
1768 | { | |
1769 | hw->network = network; | |
1770 | } |