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-rw-r--r--drivers/tty/ipwireless/hardware.c1764
1 files changed, 1764 insertions, 0 deletions
diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c
new file mode 100644
index 000000000000..0aeb5a38d296
--- /dev/null
+++ b/drivers/tty/ipwireless/hardware.c
@@ -0,0 +1,1764 @@
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
30static void ipw_send_setup_packet(struct ipw_hardware *hw);
31static void handle_received_SETUP_packet(struct ipw_hardware *ipw,
32 unsigned int address,
33 const unsigned char *data, int len,
34 int is_last);
35static void ipwireless_setup_timer(unsigned long data);
36static void handle_received_CTRL_packet(struct ipw_hardware *hw,
37 unsigned int channel_idx, const unsigned char *data, int len);
38
39/*#define TIMING_DIAGNOSTICS*/
40
41#ifdef TIMING_DIAGNOSTICS
42
43static 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
52static void start_timing(void)
53{
54 timing_stats.start_time = jiffies;
55}
56
57static 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
64static 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
71static 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
82 ": %u us elapsed - read %lu bytes in %u us, wrote %lu bytes in %u us\n",
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
96static void start_timing(void) { }
97static void end_read_timing(unsigned length) { }
98static 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 */
115enum {
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
134struct nl_first_packet_header {
135 unsigned char protocol:3;
136 unsigned char address:3;
137 unsigned char packet_rank:2;
138 unsigned char length_lsb;
139 unsigned char length_msb;
140};
141
142struct nl_packet_header {
143 unsigned char protocol:3;
144 unsigned char address:3;
145 unsigned char packet_rank:2;
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
153union 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
194struct 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
203struct 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
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
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
228struct ipw_hardware {
229 unsigned int base_port;
230 short hw_version;
231 unsigned short ll_mtu;
232 spinlock_t lock;
233
234 int initializing;
235 int init_loops;
236 struct timer_list setup_timer;
237
238 /* Flag if hw is ready to send next packet */
239 int tx_ready;
240 /* Count of pending packets to be sent */
241 int tx_queued;
242 struct list_head tx_queue[NL_NUM_OF_PRIORITIES];
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 */
293struct 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
322struct 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
329struct ipw_control_packet {
330 struct ipw_tx_packet header;
331 struct ipw_control_packet_body body;
332};
333
334struct 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
342static 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
362static 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
373static 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 */
381 ret |= tmp & 0xc0 >> 6;
382 ret |= tmp & 0x38 >> 1;
383 ret |= tmp & 0x07 << 5;
384 *data = ret & 0xff;
385#endif
386}
387
388static 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 */
396 ret |= tmp & 0xe0 >> 5;
397 ret |= tmp & 0x1c << 1;
398 ret |= tmp & 0x03 << 6;
399 *data = ret & 0xff;
400#endif
401}
402
403static void do_send_fragment(struct ipw_hardware *hw, unsigned char *data,
404 unsigned length)
405{
406 unsigned i;
407 unsigned long flags;
408
409 start_timing();
410 BUG_ON(length > hw->ll_mtu);
411
412 if (ipwireless_debug)
413 dump_data_bytes("send", data, length);
414
415 spin_lock_irqsave(&hw->lock, flags);
416
417 hw->tx_ready = 0;
418 swap_packet_bitfield_to_le(data);
419
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
427 if (i + 1 < length)
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) {
435 outw((unsigned short) length, hw->base_port);
436
437 for (i = 0; i < length; i += 2) {
438 unsigned short d = data[i];
439 __le16 raw_data;
440
441 if (i + 1 < length)
442 d |= data[i + 1] << 8;
443 raw_data = cpu_to_le16(d);
444 outw(raw_data, hw->base_port);
445 }
446 while ((i & 3) != 2) {
447 outw((unsigned short) 0xDEAD, hw->base_port);
448 i += 2;
449 }
450 writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx);
451 }
452
453 spin_unlock_irqrestore(&hw->lock, flags);
454
455 end_write_timing(length);
456}
457
458static void do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet)
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
473 /*
474 * hdr_first is now in machine bitfield order, which will be swapped
475 * to le just before it goes to hw
476 */
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
508 spin_lock_irqsave(&hw->lock, flags);
509 list_add(&packet->queue, &hw->tx_queue[0]);
510 hw->tx_queued++;
511 spin_unlock_irqrestore(&hw->lock, flags);
512 } else {
513 if (packet->packet_callback)
514 packet->packet_callback(packet->callback_data,
515 packet->length);
516 kfree(packet);
517 }
518}
519
520static void ipw_setup_hardware(struct ipw_hardware *hw)
521{
522 unsigned long flags;
523
524 spin_lock_irqsave(&hw->lock, flags);
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 }
543 spin_unlock_irqrestore(&hw->lock, flags);
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 */
554static 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
562 spin_lock_irqsave(&hw->lock, flags);
563 if (!list_empty(&hw->rx_pool)) {
564 packet = list_first_entry(&hw->rx_pool,
565 struct ipw_rx_packet, queue);
566 hw->rx_pool_size--;
567 spin_unlock_irqrestore(&hw->lock, flags);
568 list_del(&packet->queue);
569 } else {
570 const int min_capacity =
571 ipwireless_ppp_mru(hw->network) + 2;
572 int new_capacity;
573
574 spin_unlock_irqrestore(&hw->lock, flags);
575 new_capacity =
576 (minimum_free_space > min_capacity
577 ? minimum_free_space
578 : min_capacity);
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
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);
594 if (!packet) {
595 kfree(old_packet);
596 return NULL;
597 }
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
608static 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++;
614 list_add(&packet->queue, &hw->rx_pool);
615 }
616}
617
618static void queue_received_packet(struct ipw_hardware *hw,
619 unsigned int protocol,
620 unsigned int address,
621 const unsigned char *data, int length,
622 int is_last)
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
649 ": no memory for incomming data packet, dropped!\n");
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 */
664 spin_lock_irqsave(&hw->lock, flags);
665 hw->rx_bytes_queued += packet->length;
666 spin_unlock_irqrestore(&hw->lock, flags);
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
673 ": no memory for incomming ctrl packet, dropped!\n");
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) {
688 spin_lock_irqsave(&hw->lock, flags);
689 list_add_tail(&packet->queue, &hw->rx_queue);
690 /* Block reception of incoming packets if queue is full. */
691 hw->blocking_rx =
692 (hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE);
693
694 spin_unlock_irqrestore(&hw->lock, flags);
695 schedule_work(&hw->work_rx);
696 }
697}
698
699/*
700 * Workqueue callback
701 */
702static 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
708 spin_lock_irqsave(&hw->lock, flags);
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. */
726 spin_unlock_irqrestore(&hw->lock, flags);
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);
737 spin_lock_irqsave(&hw->lock, flags);
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 }
761 spin_unlock_irqrestore(&hw->lock, flags);
762}
763
764static void handle_received_CTRL_packet(struct ipw_hardware *hw,
765 unsigned int channel_idx,
766 const unsigned char *data, int len)
767{
768 const struct ipw_control_packet_body *body =
769 (const struct ipw_control_packet_body *) data;
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
810static void handle_received_packet(struct ipw_hardware *hw,
811 const union nl_packet *packet,
812 unsigned short len)
813{
814 unsigned int protocol = packet->hdr.protocol;
815 unsigned int address = packet->hdr.address;
816 unsigned int header_length;
817 const unsigned char *data;
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
841static 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 */
853static void do_receive_packet(struct ipw_hardware *hw)
854{
855 unsigned len;
856 unsigned i;
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
865 ": received a packet of %u bytes - longer than the MTU!\n", len);
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 {
878 len = inw(hw->base_port);
879 if (len > hw->ll_mtu) {
880 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
881 ": received a packet of %u bytes - longer than the MTU!\n", len);
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) {
888 __le16 raw_data = inw(hw->base_port);
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) {
896 inw(hw->base_port);
897 i += 2;
898 }
899 }
900
901 acknowledge_data_read(hw);
902
903 swap_packet_bitfield_from_le(pkt);
904
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
913static 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
922 ? PRIO_SETUP + 1 : NL_NUM_OF_PRIORITIES);
923}
924
925/*
926 * return 1 if something has been received from hw
927 */
928static int get_packets_from_hw(struct ipw_hardware *hw)
929{
930 int received = 0;
931 unsigned long flags;
932
933 spin_lock_irqsave(&hw->lock, flags);
934 while (hw->rx_ready && !hw->blocking_rx) {
935 received = 1;
936 hw->rx_ready--;
937 spin_unlock_irqrestore(&hw->lock, flags);
938
939 do_receive_packet(hw);
940
941 spin_lock_irqsave(&hw->lock, flags);
942 }
943 spin_unlock_irqrestore(&hw->lock, flags);
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 */
954static int send_pending_packet(struct ipw_hardware *hw, int priority_limit)
955{
956 int more_to_send = 0;
957 unsigned long flags;
958
959 spin_lock_irqsave(&hw->lock, flags);
960 if (hw->tx_queued && hw->tx_ready) {
961 int priority;
962 struct ipw_tx_packet *packet = NULL;
963
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
972 hw->tx_queued--;
973 list_del(&packet->queue);
974
975 break;
976 }
977 }
978 if (!packet) {
979 hw->tx_queued = 0;
980 spin_unlock_irqrestore(&hw->lock, flags);
981 return 0;
982 }
983
984 spin_unlock_irqrestore(&hw->lock, flags);
985
986 /* Send */
987 do_send_packet(hw, packet);
988
989 /* Check if more to send */
990 spin_lock_irqsave(&hw->lock, flags);
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 }
1000 spin_unlock_irqrestore(&hw->lock, flags);
1001
1002 return more_to_send;
1003}
1004
1005/*
1006 * Send and receive all queued packets.
1007 */
1008static void ipwireless_do_tasklet(unsigned long hw_)
1009{
1010 struct ipw_hardware *hw = (struct ipw_hardware *) hw_;
1011 unsigned long flags;
1012
1013 spin_lock_irqsave(&hw->lock, flags);
1014 if (hw->shutting_down) {
1015 spin_unlock_irqrestore(&hw->lock, flags);
1016 return;
1017 }
1018
1019 if (hw->to_setup == 1) {
1020 /*
1021 * Initial setup data sent to hardware
1022 */
1023 hw->to_setup = 2;
1024 spin_unlock_irqrestore(&hw->lock, flags);
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
1035 spin_unlock_irqrestore(&hw->lock, flags);
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 */
1047static 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
1056static 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;
1073 spin_lock_irqsave(&hw->lock, flags);
1074 hw->tx_ready = 1;
1075 spin_unlock_irqrestore(&hw->lock, flags);
1076 }
1077 /* Received data */
1078 if (irqn & IR_RXINTR) {
1079 ack |= IR_RXINTR;
1080 spin_lock_irqsave(&hw->lock, flags);
1081 hw->rx_ready++;
1082 spin_unlock_irqrestore(&hw->lock, flags);
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
1093static 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
1101static 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 }
1133 } else
1134 return IRQ_NONE;
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;
1153 spin_lock_irqsave(&hw->lock, flags);
1154 hw->rx_ready++;
1155 spin_unlock_irqrestore(&hw->lock, flags);
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
1170 spin_lock_irqsave(&hw->lock, flags);
1171 hw->rx_ready++;
1172 spin_unlock_irqrestore(&hw->lock, flags);
1173 }
1174 rx = 1;
1175 }
1176 }
1177 if (memrxdone & MEMRX_RX_DONE) {
1178 writew(0, &hw->memory_info_regs->memreg_rx_done);
1179 spin_lock_irqsave(&hw->lock, flags);
1180 hw->tx_ready = 1;
1181 spin_unlock_irqrestore(&hw->lock, flags);
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
1199 ": no valid memreg_tx value - switching to the old memreg_tx\n");
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
1214irqreturn_t ipwireless_interrupt(int irq, void *dev_id)
1215{
1216 struct ipw_dev *ipw = dev_id;
1217
1218 if (ipw->hardware->hw_version == HW_VERSION_1)
1219 return ipwireless_handle_v1_interrupt(irq, ipw->hardware);
1220 else
1221 return ipwireless_handle_v2_v3_interrupt(irq, ipw->hardware);
1222}
1223
1224static void flush_packets_to_hw(struct ipw_hardware *hw)
1225{
1226 int priority_limit;
1227 unsigned long flags;
1228
1229 spin_lock_irqsave(&hw->lock, flags);
1230 priority_limit = get_current_packet_priority(hw);
1231 spin_unlock_irqrestore(&hw->lock, flags);
1232
1233 while (send_pending_packet(hw, priority_limit));
1234}
1235
1236static void send_packet(struct ipw_hardware *hw, int priority,
1237 struct ipw_tx_packet *packet)
1238{
1239 unsigned long flags;
1240
1241 spin_lock_irqsave(&hw->lock, flags);
1242 list_add_tail(&packet->queue, &hw->tx_queue[priority]);
1243 hw->tx_queued++;
1244 spin_unlock_irqrestore(&hw->lock, flags);
1245
1246 flush_packets_to_hw(hw);
1247}
1248
1249/* Create data packet, non-atomic allocation */
1250static 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
1269static 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
1293int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx,
1294 const unsigned char *data, unsigned int length,
1295 void (*callback) (void *cb, unsigned int length),
1296 void *callback_data)
1297{
1298 struct ipw_tx_packet *packet;
1299
1300 packet = alloc_data_packet(length, (channel_idx + 1),
1301 TL_PROTOCOLID_COM_DATA);
1302 if (!packet)
1303 return -ENOMEM;
1304 packet->packet_callback = callback;
1305 packet->callback_data = callback_data;
1306 memcpy((unsigned char *) packet + sizeof(struct ipw_tx_packet), data,
1307 length);
1308
1309 send_packet(hw, PRIO_DATA, packet);
1310 return 0;
1311}
1312
1313static 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),
1323 (channel_idx + 1), protocolid, line);
1324 if (!packet)
1325 return -ENOMEM;
1326 packet->header.length = sizeof(struct ipw_control_packet_body);
1327 packet->body.value = (state == 0 ? 0 : 1);
1328 send_packet(hw, prio, &packet->header);
1329 return 0;
1330}
1331
1332
1333static 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
1344static 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
1355int 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
1361int 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
1367struct ipw_setup_get_version_query_packet {
1368 struct ipw_tx_packet header;
1369 struct tl_setup_get_version_qry body;
1370};
1371
1372struct ipw_setup_config_packet {
1373 struct ipw_tx_packet header;
1374 struct tl_setup_config_msg body;
1375};
1376
1377struct ipw_setup_config_done_packet {
1378 struct ipw_tx_packet header;
1379 struct tl_setup_config_done_msg body;
1380};
1381
1382struct ipw_setup_open_packet {
1383 struct ipw_tx_packet header;
1384 struct tl_setup_open_msg body;
1385};
1386
1387struct ipw_setup_info_packet {
1388 struct ipw_tx_packet header;
1389 struct tl_setup_info_msg body;
1390};
1391
1392struct 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 */
1398static 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
1458 set_RTS(hw, PRIO_SETUP, channel_idx,
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
1489exit_nomem:
1490 printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1491 ": not enough memory to alloc control packet\n");
1492 hw->to_setup = -1;
1493}
1494
1495static 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
1505 printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1506 ": invalid hardware version no %u\n",
1507 (unsigned int) vers_no);
1508}
1509
1510static 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
1526static void handle_received_SETUP_packet(struct ipw_hardware *hw,
1527 unsigned int address,
1528 const unsigned char *data, int len,
1529 int is_last)
1530{
1531 const union ipw_setup_rx_msg *rx_msg = (const union ipw_setup_rx_msg *) data;
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
1590static 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
1609struct 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);
1629 spin_lock_init(&hw->lock);
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
1638void 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;
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);
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
1661void 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
1670static 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
1695 spin_lock_irqsave(&hw->lock, flags);
1696 hw->to_setup = 1;
1697 hw->tx_ready = 1;
1698 spin_unlock_irqrestore(&hw->lock, flags);
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 */
1712void 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
1724void 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
1732 flush_work_sync(&hw->work_rx);
1733
1734 for (i = 0; i < NL_NUM_OF_ADDRESSES; i++)
1735 if (hw->packet_assembler[i] != NULL)
1736 kfree(hw->packet_assembler[i]);
1737
1738 for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
1739 list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) {
1740 list_del(&tp->queue);
1741 kfree(tp);
1742 }
1743
1744 list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) {
1745 list_del(&rp->queue);
1746 kfree(rp);
1747 }
1748
1749 list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) {
1750 list_del(&rp->queue);
1751 kfree(rp);
1752 }
1753 kfree(hw);
1754}
1755
1756/*
1757 * Associate the specified network with this hardware, so it will receive events
1758 * from it.
1759 */
1760void ipwireless_associate_network(struct ipw_hardware *hw,
1761 struct ipw_network *network)
1762{
1763 hw->network = network;
1764}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 23:38:19 -0400