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1 | /********************************************************************* | |
2 | * | |
3 | * Filename: nsc-ircc.c | |
4 | * Version: 1.0 | |
5 | * Description: Driver for the NSC PC'108 and PC'338 IrDA chipsets | |
6 | * Status: Stable. | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Sat Nov 7 21:43:15 1998 | |
9 | * Modified at: Wed Mar 1 11:29:34 2000 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
11 | * | |
12 | * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no> | |
13 | * Copyright (c) 1998 Lichen Wang, <lwang@actisys.com> | |
14 | * Copyright (c) 1998 Actisys Corp., www.actisys.com | |
15 | * Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.com> | |
16 | * All Rights Reserved | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License as | |
20 | * published by the Free Software Foundation; either version 2 of | |
21 | * the License, or (at your option) any later version. | |
22 | * | |
23 | * Neither Dag Brattli nor University of Tromsø admit liability nor | |
24 | * provide warranty for any of this software. This material is | |
25 | * provided "AS-IS" and at no charge. | |
26 | * | |
27 | * Notice that all functions that needs to access the chip in _any_ | |
28 | * way, must save BSR register on entry, and restore it on exit. | |
29 | * It is _very_ important to follow this policy! | |
30 | * | |
31 | * __u8 bank; | |
32 | * | |
33 | * bank = inb(iobase+BSR); | |
34 | * | |
35 | * do_your_stuff_here(); | |
36 | * | |
37 | * outb(bank, iobase+BSR); | |
38 | * | |
39 | * If you find bugs in this file, its very likely that the same bug | |
40 | * will also be in w83977af_ir.c since the implementations are quite | |
41 | * similar. | |
42 | * | |
43 | ********************************************************************/ | |
44 | ||
45 | #include <linux/module.h> | |
46 | ||
47 | #include <linux/kernel.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/skbuff.h> | |
50 | #include <linux/netdevice.h> | |
51 | #include <linux/ioport.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/slab.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/rtnetlink.h> | |
56 | #include <linux/dma-mapping.h> | |
57 | #include <linux/pnp.h> | |
58 | #include <linux/platform_device.h> | |
59 | ||
60 | #include <asm/io.h> | |
61 | #include <asm/dma.h> | |
62 | #include <asm/byteorder.h> | |
63 | ||
64 | #include <net/irda/wrapper.h> | |
65 | #include <net/irda/irda.h> | |
66 | #include <net/irda/irda_device.h> | |
67 | ||
68 | #include "nsc-ircc.h" | |
69 | ||
70 | #define CHIP_IO_EXTENT 8 | |
71 | #define BROKEN_DONGLE_ID | |
72 | ||
73 | static char *driver_name = "nsc-ircc"; | |
74 | ||
75 | /* Power Management */ | |
76 | #define NSC_IRCC_DRIVER_NAME "nsc-ircc" | |
77 | static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state); | |
78 | static int nsc_ircc_resume(struct platform_device *dev); | |
79 | ||
80 | static struct platform_driver nsc_ircc_driver = { | |
81 | .suspend = nsc_ircc_suspend, | |
82 | .resume = nsc_ircc_resume, | |
83 | .driver = { | |
84 | .name = NSC_IRCC_DRIVER_NAME, | |
85 | }, | |
86 | }; | |
87 | ||
88 | /* Module parameters */ | |
89 | static int qos_mtt_bits = 0x07; /* 1 ms or more */ | |
90 | static int dongle_id; | |
91 | ||
92 | /* Use BIOS settions by default, but user may supply module parameters */ | |
93 | static unsigned int io[] = { ~0, ~0, ~0, ~0, ~0 }; | |
94 | static unsigned int irq[] = { 0, 0, 0, 0, 0 }; | |
95 | static unsigned int dma[] = { 0, 0, 0, 0, 0 }; | |
96 | ||
97 | static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info); | |
98 | static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info); | |
99 | static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info); | |
100 | static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info); | |
101 | static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info); | |
102 | static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info); | |
103 | #ifdef CONFIG_PNP | |
104 | static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id); | |
105 | #endif | |
106 | ||
107 | /* These are the known NSC chips */ | |
108 | static nsc_chip_t chips[] = { | |
109 | /* Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */ | |
110 | { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0, | |
111 | nsc_ircc_probe_108, nsc_ircc_init_108 }, | |
112 | { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8, | |
113 | nsc_ircc_probe_338, nsc_ircc_init_338 }, | |
114 | /* Contributed by Steffen Pingel - IBM X40 */ | |
115 | { "PC8738x", { 0x164e, 0x4e, 0x2e }, 0x20, 0xf4, 0xff, | |
116 | nsc_ircc_probe_39x, nsc_ircc_init_39x }, | |
117 | /* Contributed by Jan Frey - IBM A30/A31 */ | |
118 | { "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff, | |
119 | nsc_ircc_probe_39x, nsc_ircc_init_39x }, | |
120 | /* IBM ThinkPads using PC8738x (T60/X60/Z60) */ | |
121 | { "IBM-PC8738x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf4, 0xff, | |
122 | nsc_ircc_probe_39x, nsc_ircc_init_39x }, | |
123 | /* IBM ThinkPads using PC8394T (T43/R52/?) */ | |
124 | { "IBM-PC8394T", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf9, 0xff, | |
125 | nsc_ircc_probe_39x, nsc_ircc_init_39x }, | |
126 | { NULL } | |
127 | }; | |
128 | ||
129 | static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL, NULL }; | |
130 | ||
131 | static char *dongle_types[] = { | |
132 | "Differential serial interface", | |
133 | "Differential serial interface", | |
134 | "Reserved", | |
135 | "Reserved", | |
136 | "Sharp RY5HD01", | |
137 | "Reserved", | |
138 | "Single-ended serial interface", | |
139 | "Consumer-IR only", | |
140 | "HP HSDL-2300, HP HSDL-3600/HSDL-3610", | |
141 | "IBM31T1100 or Temic TFDS6000/TFDS6500", | |
142 | "Reserved", | |
143 | "Reserved", | |
144 | "HP HSDL-1100/HSDL-2100", | |
145 | "HP HSDL-1100/HSDL-2100", | |
146 | "Supports SIR Mode only", | |
147 | "No dongle connected", | |
148 | }; | |
149 | ||
150 | /* PNP probing */ | |
151 | static chipio_t pnp_info; | |
152 | static const struct pnp_device_id nsc_ircc_pnp_table[] = { | |
153 | { .id = "NSC6001", .driver_data = 0 }, | |
154 | { .id = "HWPC224", .driver_data = 0 }, | |
155 | { .id = "IBM0071", .driver_data = NSC_FORCE_DONGLE_TYPE9 }, | |
156 | { } | |
157 | }; | |
158 | ||
159 | MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table); | |
160 | ||
161 | static struct pnp_driver nsc_ircc_pnp_driver = { | |
162 | #ifdef CONFIG_PNP | |
163 | .name = "nsc-ircc", | |
164 | .id_table = nsc_ircc_pnp_table, | |
165 | .probe = nsc_ircc_pnp_probe, | |
166 | #endif | |
167 | }; | |
168 | ||
169 | /* Some prototypes */ | |
170 | static int nsc_ircc_open(chipio_t *info); | |
171 | static int nsc_ircc_close(struct nsc_ircc_cb *self); | |
172 | static int nsc_ircc_setup(chipio_t *info); | |
173 | static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self); | |
174 | static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self); | |
175 | static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase); | |
176 | static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev); | |
177 | static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev); | |
178 | static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size); | |
179 | static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase); | |
180 | static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud); | |
181 | static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self); | |
182 | static int nsc_ircc_read_dongle_id (int iobase); | |
183 | static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id); | |
184 | ||
185 | static int nsc_ircc_net_open(struct net_device *dev); | |
186 | static int nsc_ircc_net_close(struct net_device *dev); | |
187 | static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
188 | ||
189 | /* Globals */ | |
190 | static int pnp_registered; | |
191 | static int pnp_succeeded; | |
192 | ||
193 | /* | |
194 | * Function nsc_ircc_init () | |
195 | * | |
196 | * Initialize chip. Just try to find out how many chips we are dealing with | |
197 | * and where they are | |
198 | */ | |
199 | static int __init nsc_ircc_init(void) | |
200 | { | |
201 | chipio_t info; | |
202 | nsc_chip_t *chip; | |
203 | int ret; | |
204 | int cfg_base; | |
205 | int cfg, id; | |
206 | int reg; | |
207 | int i = 0; | |
208 | ||
209 | ret = platform_driver_register(&nsc_ircc_driver); | |
210 | if (ret) { | |
211 | IRDA_ERROR("%s, Can't register driver!\n", driver_name); | |
212 | return ret; | |
213 | } | |
214 | ||
215 | /* Register with PnP subsystem to detect disable ports */ | |
216 | ret = pnp_register_driver(&nsc_ircc_pnp_driver); | |
217 | ||
218 | if (!ret) | |
219 | pnp_registered = 1; | |
220 | ||
221 | ret = -ENODEV; | |
222 | ||
223 | /* Probe for all the NSC chipsets we know about */ | |
224 | for (chip = chips; chip->name ; chip++) { | |
225 | IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, | |
226 | chip->name); | |
227 | ||
228 | /* Try all config registers for this chip */ | |
229 | for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) { | |
230 | cfg_base = chip->cfg[cfg]; | |
231 | if (!cfg_base) | |
232 | continue; | |
233 | ||
234 | /* Read index register */ | |
235 | reg = inb(cfg_base); | |
236 | if (reg == 0xff) { | |
237 | IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, cfg_base); | |
238 | continue; | |
239 | } | |
240 | ||
241 | /* Read chip identification register */ | |
242 | outb(chip->cid_index, cfg_base); | |
243 | id = inb(cfg_base+1); | |
244 | if ((id & chip->cid_mask) == chip->cid_value) { | |
245 | IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n", | |
246 | __func__, chip->name, id & ~chip->cid_mask); | |
247 | ||
248 | /* | |
249 | * If we found a correct PnP setting, | |
250 | * we first try it. | |
251 | */ | |
252 | if (pnp_succeeded) { | |
253 | memset(&info, 0, sizeof(chipio_t)); | |
254 | info.cfg_base = cfg_base; | |
255 | info.fir_base = pnp_info.fir_base; | |
256 | info.dma = pnp_info.dma; | |
257 | info.irq = pnp_info.irq; | |
258 | ||
259 | if (info.fir_base < 0x2000) { | |
260 | IRDA_MESSAGE("%s, chip->init\n", driver_name); | |
261 | chip->init(chip, &info); | |
262 | } else | |
263 | chip->probe(chip, &info); | |
264 | ||
265 | if (nsc_ircc_open(&info) >= 0) | |
266 | ret = 0; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Opening based on PnP values failed. | |
271 | * Let's fallback to user values, or probe | |
272 | * the chip. | |
273 | */ | |
274 | if (ret) { | |
275 | IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name); | |
276 | memset(&info, 0, sizeof(chipio_t)); | |
277 | info.cfg_base = cfg_base; | |
278 | info.fir_base = io[i]; | |
279 | info.dma = dma[i]; | |
280 | info.irq = irq[i]; | |
281 | ||
282 | /* | |
283 | * If the user supplies the base address, then | |
284 | * we init the chip, if not we probe the values | |
285 | * set by the BIOS | |
286 | */ | |
287 | if (io[i] < 0x2000) { | |
288 | chip->init(chip, &info); | |
289 | } else | |
290 | chip->probe(chip, &info); | |
291 | ||
292 | if (nsc_ircc_open(&info) >= 0) | |
293 | ret = 0; | |
294 | } | |
295 | i++; | |
296 | } else { | |
297 | IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id); | |
298 | } | |
299 | } | |
300 | } | |
301 | ||
302 | if (ret) { | |
303 | platform_driver_unregister(&nsc_ircc_driver); | |
304 | pnp_unregister_driver(&nsc_ircc_pnp_driver); | |
305 | pnp_registered = 0; | |
306 | } | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
311 | /* | |
312 | * Function nsc_ircc_cleanup () | |
313 | * | |
314 | * Close all configured chips | |
315 | * | |
316 | */ | |
317 | static void __exit nsc_ircc_cleanup(void) | |
318 | { | |
319 | int i; | |
320 | ||
321 | for (i = 0; i < ARRAY_SIZE(dev_self); i++) { | |
322 | if (dev_self[i]) | |
323 | nsc_ircc_close(dev_self[i]); | |
324 | } | |
325 | ||
326 | platform_driver_unregister(&nsc_ircc_driver); | |
327 | ||
328 | if (pnp_registered) | |
329 | pnp_unregister_driver(&nsc_ircc_pnp_driver); | |
330 | ||
331 | pnp_registered = 0; | |
332 | } | |
333 | ||
334 | static const struct net_device_ops nsc_ircc_sir_ops = { | |
335 | .ndo_open = nsc_ircc_net_open, | |
336 | .ndo_stop = nsc_ircc_net_close, | |
337 | .ndo_start_xmit = nsc_ircc_hard_xmit_sir, | |
338 | .ndo_do_ioctl = nsc_ircc_net_ioctl, | |
339 | }; | |
340 | ||
341 | static const struct net_device_ops nsc_ircc_fir_ops = { | |
342 | .ndo_open = nsc_ircc_net_open, | |
343 | .ndo_stop = nsc_ircc_net_close, | |
344 | .ndo_start_xmit = nsc_ircc_hard_xmit_fir, | |
345 | .ndo_do_ioctl = nsc_ircc_net_ioctl, | |
346 | }; | |
347 | ||
348 | /* | |
349 | * Function nsc_ircc_open (iobase, irq) | |
350 | * | |
351 | * Open driver instance | |
352 | * | |
353 | */ | |
354 | static int __init nsc_ircc_open(chipio_t *info) | |
355 | { | |
356 | struct net_device *dev; | |
357 | struct nsc_ircc_cb *self; | |
358 | void *ret; | |
359 | int err, chip_index; | |
360 | ||
361 | IRDA_DEBUG(2, "%s()\n", __func__); | |
362 | ||
363 | ||
364 | for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) { | |
365 | if (!dev_self[chip_index]) | |
366 | break; | |
367 | } | |
368 | ||
369 | if (chip_index == ARRAY_SIZE(dev_self)) { | |
370 | IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__); | |
371 | return -ENOMEM; | |
372 | } | |
373 | ||
374 | IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name, | |
375 | info->cfg_base); | |
376 | ||
377 | if ((nsc_ircc_setup(info)) == -1) | |
378 | return -1; | |
379 | ||
380 | IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name); | |
381 | ||
382 | dev = alloc_irdadev(sizeof(struct nsc_ircc_cb)); | |
383 | if (dev == NULL) { | |
384 | IRDA_ERROR("%s(), can't allocate memory for " | |
385 | "control block!\n", __func__); | |
386 | return -ENOMEM; | |
387 | } | |
388 | ||
389 | self = netdev_priv(dev); | |
390 | self->netdev = dev; | |
391 | spin_lock_init(&self->lock); | |
392 | ||
393 | /* Need to store self somewhere */ | |
394 | dev_self[chip_index] = self; | |
395 | self->index = chip_index; | |
396 | ||
397 | /* Initialize IO */ | |
398 | self->io.cfg_base = info->cfg_base; | |
399 | self->io.fir_base = info->fir_base; | |
400 | self->io.irq = info->irq; | |
401 | self->io.fir_ext = CHIP_IO_EXTENT; | |
402 | self->io.dma = info->dma; | |
403 | self->io.fifo_size = 32; | |
404 | ||
405 | /* Reserve the ioports that we need */ | |
406 | ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name); | |
407 | if (!ret) { | |
408 | IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", | |
409 | __func__, self->io.fir_base); | |
410 | err = -ENODEV; | |
411 | goto out1; | |
412 | } | |
413 | ||
414 | /* Initialize QoS for this device */ | |
415 | irda_init_max_qos_capabilies(&self->qos); | |
416 | ||
417 | /* The only value we must override it the baudrate */ | |
418 | self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| | |
419 | IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8); | |
420 | ||
421 | self->qos.min_turn_time.bits = qos_mtt_bits; | |
422 | irda_qos_bits_to_value(&self->qos); | |
423 | ||
424 | /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ | |
425 | self->rx_buff.truesize = 14384; | |
426 | self->tx_buff.truesize = 14384; | |
427 | ||
428 | /* Allocate memory if needed */ | |
429 | self->rx_buff.head = | |
430 | dma_alloc_coherent(NULL, self->rx_buff.truesize, | |
431 | &self->rx_buff_dma, GFP_KERNEL); | |
432 | if (self->rx_buff.head == NULL) { | |
433 | err = -ENOMEM; | |
434 | goto out2; | |
435 | ||
436 | } | |
437 | memset(self->rx_buff.head, 0, self->rx_buff.truesize); | |
438 | ||
439 | self->tx_buff.head = | |
440 | dma_alloc_coherent(NULL, self->tx_buff.truesize, | |
441 | &self->tx_buff_dma, GFP_KERNEL); | |
442 | if (self->tx_buff.head == NULL) { | |
443 | err = -ENOMEM; | |
444 | goto out3; | |
445 | } | |
446 | memset(self->tx_buff.head, 0, self->tx_buff.truesize); | |
447 | ||
448 | self->rx_buff.in_frame = FALSE; | |
449 | self->rx_buff.state = OUTSIDE_FRAME; | |
450 | self->tx_buff.data = self->tx_buff.head; | |
451 | self->rx_buff.data = self->rx_buff.head; | |
452 | ||
453 | /* Reset Tx queue info */ | |
454 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; | |
455 | self->tx_fifo.tail = self->tx_buff.head; | |
456 | ||
457 | /* Override the network functions we need to use */ | |
458 | dev->netdev_ops = &nsc_ircc_sir_ops; | |
459 | ||
460 | err = register_netdev(dev); | |
461 | if (err) { | |
462 | IRDA_ERROR("%s(), register_netdev() failed!\n", __func__); | |
463 | goto out4; | |
464 | } | |
465 | IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name); | |
466 | ||
467 | /* Check if user has supplied a valid dongle id or not */ | |
468 | if ((dongle_id <= 0) || | |
469 | (dongle_id >= ARRAY_SIZE(dongle_types))) { | |
470 | dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base); | |
471 | ||
472 | IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name, | |
473 | dongle_types[dongle_id]); | |
474 | } else { | |
475 | IRDA_MESSAGE("%s, Using dongle: %s\n", driver_name, | |
476 | dongle_types[dongle_id]); | |
477 | } | |
478 | ||
479 | self->io.dongle_id = dongle_id; | |
480 | nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id); | |
481 | ||
482 | self->pldev = platform_device_register_simple(NSC_IRCC_DRIVER_NAME, | |
483 | self->index, NULL, 0); | |
484 | if (IS_ERR(self->pldev)) { | |
485 | err = PTR_ERR(self->pldev); | |
486 | goto out5; | |
487 | } | |
488 | platform_set_drvdata(self->pldev, self); | |
489 | ||
490 | return chip_index; | |
491 | ||
492 | out5: | |
493 | unregister_netdev(dev); | |
494 | out4: | |
495 | dma_free_coherent(NULL, self->tx_buff.truesize, | |
496 | self->tx_buff.head, self->tx_buff_dma); | |
497 | out3: | |
498 | dma_free_coherent(NULL, self->rx_buff.truesize, | |
499 | self->rx_buff.head, self->rx_buff_dma); | |
500 | out2: | |
501 | release_region(self->io.fir_base, self->io.fir_ext); | |
502 | out1: | |
503 | free_netdev(dev); | |
504 | dev_self[chip_index] = NULL; | |
505 | return err; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Function nsc_ircc_close (self) | |
510 | * | |
511 | * Close driver instance | |
512 | * | |
513 | */ | |
514 | static int __exit nsc_ircc_close(struct nsc_ircc_cb *self) | |
515 | { | |
516 | int iobase; | |
517 | ||
518 | IRDA_DEBUG(4, "%s()\n", __func__); | |
519 | ||
520 | IRDA_ASSERT(self != NULL, return -1;); | |
521 | ||
522 | iobase = self->io.fir_base; | |
523 | ||
524 | platform_device_unregister(self->pldev); | |
525 | ||
526 | /* Remove netdevice */ | |
527 | unregister_netdev(self->netdev); | |
528 | ||
529 | /* Release the PORT that this driver is using */ | |
530 | IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", | |
531 | __func__, self->io.fir_base); | |
532 | release_region(self->io.fir_base, self->io.fir_ext); | |
533 | ||
534 | if (self->tx_buff.head) | |
535 | dma_free_coherent(NULL, self->tx_buff.truesize, | |
536 | self->tx_buff.head, self->tx_buff_dma); | |
537 | ||
538 | if (self->rx_buff.head) | |
539 | dma_free_coherent(NULL, self->rx_buff.truesize, | |
540 | self->rx_buff.head, self->rx_buff_dma); | |
541 | ||
542 | dev_self[self->index] = NULL; | |
543 | free_netdev(self->netdev); | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma) | |
550 | * | |
551 | * Initialize the NSC '108 chip | |
552 | * | |
553 | */ | |
554 | static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info) | |
555 | { | |
556 | int cfg_base = info->cfg_base; | |
557 | __u8 temp=0; | |
558 | ||
559 | outb(2, cfg_base); /* Mode Control Register (MCTL) */ | |
560 | outb(0x00, cfg_base+1); /* Disable device */ | |
561 | ||
562 | /* Base Address and Interrupt Control Register (BAIC) */ | |
563 | outb(CFG_108_BAIC, cfg_base); | |
564 | switch (info->fir_base) { | |
565 | case 0x3e8: outb(0x14, cfg_base+1); break; | |
566 | case 0x2e8: outb(0x15, cfg_base+1); break; | |
567 | case 0x3f8: outb(0x16, cfg_base+1); break; | |
568 | case 0x2f8: outb(0x17, cfg_base+1); break; | |
569 | default: IRDA_ERROR("%s(), invalid base_address", __func__); | |
570 | } | |
571 | ||
572 | /* Control Signal Routing Register (CSRT) */ | |
573 | switch (info->irq) { | |
574 | case 3: temp = 0x01; break; | |
575 | case 4: temp = 0x02; break; | |
576 | case 5: temp = 0x03; break; | |
577 | case 7: temp = 0x04; break; | |
578 | case 9: temp = 0x05; break; | |
579 | case 11: temp = 0x06; break; | |
580 | case 15: temp = 0x07; break; | |
581 | default: IRDA_ERROR("%s(), invalid irq", __func__); | |
582 | } | |
583 | outb(CFG_108_CSRT, cfg_base); | |
584 | ||
585 | switch (info->dma) { | |
586 | case 0: outb(0x08+temp, cfg_base+1); break; | |
587 | case 1: outb(0x10+temp, cfg_base+1); break; | |
588 | case 3: outb(0x18+temp, cfg_base+1); break; | |
589 | default: IRDA_ERROR("%s(), invalid dma", __func__); | |
590 | } | |
591 | ||
592 | outb(CFG_108_MCTL, cfg_base); /* Mode Control Register (MCTL) */ | |
593 | outb(0x03, cfg_base+1); /* Enable device */ | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Function nsc_ircc_probe_108 (chip, info) | |
600 | * | |
601 | * | |
602 | * | |
603 | */ | |
604 | static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info) | |
605 | { | |
606 | int cfg_base = info->cfg_base; | |
607 | int reg; | |
608 | ||
609 | /* Read address and interrupt control register (BAIC) */ | |
610 | outb(CFG_108_BAIC, cfg_base); | |
611 | reg = inb(cfg_base+1); | |
612 | ||
613 | switch (reg & 0x03) { | |
614 | case 0: | |
615 | info->fir_base = 0x3e8; | |
616 | break; | |
617 | case 1: | |
618 | info->fir_base = 0x2e8; | |
619 | break; | |
620 | case 2: | |
621 | info->fir_base = 0x3f8; | |
622 | break; | |
623 | case 3: | |
624 | info->fir_base = 0x2f8; | |
625 | break; | |
626 | } | |
627 | info->sir_base = info->fir_base; | |
628 | IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, | |
629 | info->fir_base); | |
630 | ||
631 | /* Read control signals routing register (CSRT) */ | |
632 | outb(CFG_108_CSRT, cfg_base); | |
633 | reg = inb(cfg_base+1); | |
634 | ||
635 | switch (reg & 0x07) { | |
636 | case 0: | |
637 | info->irq = -1; | |
638 | break; | |
639 | case 1: | |
640 | info->irq = 3; | |
641 | break; | |
642 | case 2: | |
643 | info->irq = 4; | |
644 | break; | |
645 | case 3: | |
646 | info->irq = 5; | |
647 | break; | |
648 | case 4: | |
649 | info->irq = 7; | |
650 | break; | |
651 | case 5: | |
652 | info->irq = 9; | |
653 | break; | |
654 | case 6: | |
655 | info->irq = 11; | |
656 | break; | |
657 | case 7: | |
658 | info->irq = 15; | |
659 | break; | |
660 | } | |
661 | IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq); | |
662 | ||
663 | /* Currently we only read Rx DMA but it will also be used for Tx */ | |
664 | switch ((reg >> 3) & 0x03) { | |
665 | case 0: | |
666 | info->dma = -1; | |
667 | break; | |
668 | case 1: | |
669 | info->dma = 0; | |
670 | break; | |
671 | case 2: | |
672 | info->dma = 1; | |
673 | break; | |
674 | case 3: | |
675 | info->dma = 3; | |
676 | break; | |
677 | } | |
678 | IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma); | |
679 | ||
680 | /* Read mode control register (MCTL) */ | |
681 | outb(CFG_108_MCTL, cfg_base); | |
682 | reg = inb(cfg_base+1); | |
683 | ||
684 | info->enabled = reg & 0x01; | |
685 | info->suspended = !((reg >> 1) & 0x01); | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Function nsc_ircc_init_338 (chip, info) | |
692 | * | |
693 | * Initialize the NSC '338 chip. Remember that the 87338 needs two | |
694 | * consecutive writes to the data registers while CPU interrupts are | |
695 | * disabled. The 97338 does not require this, but shouldn't be any | |
696 | * harm if we do it anyway. | |
697 | */ | |
698 | static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info) | |
699 | { | |
700 | /* No init yet */ | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /* | |
706 | * Function nsc_ircc_probe_338 (chip, info) | |
707 | * | |
708 | * | |
709 | * | |
710 | */ | |
711 | static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info) | |
712 | { | |
713 | int cfg_base = info->cfg_base; | |
714 | int reg, com = 0; | |
715 | int pnp; | |
716 | ||
717 | /* Read funtion enable register (FER) */ | |
718 | outb(CFG_338_FER, cfg_base); | |
719 | reg = inb(cfg_base+1); | |
720 | ||
721 | info->enabled = (reg >> 2) & 0x01; | |
722 | ||
723 | /* Check if we are in Legacy or PnP mode */ | |
724 | outb(CFG_338_PNP0, cfg_base); | |
725 | reg = inb(cfg_base+1); | |
726 | ||
727 | pnp = (reg >> 3) & 0x01; | |
728 | if (pnp) { | |
729 | IRDA_DEBUG(2, "(), Chip is in PnP mode\n"); | |
730 | outb(0x46, cfg_base); | |
731 | reg = (inb(cfg_base+1) & 0xfe) << 2; | |
732 | ||
733 | outb(0x47, cfg_base); | |
734 | reg |= ((inb(cfg_base+1) & 0xfc) << 8); | |
735 | ||
736 | info->fir_base = reg; | |
737 | } else { | |
738 | /* Read function address register (FAR) */ | |
739 | outb(CFG_338_FAR, cfg_base); | |
740 | reg = inb(cfg_base+1); | |
741 | ||
742 | switch ((reg >> 4) & 0x03) { | |
743 | case 0: | |
744 | info->fir_base = 0x3f8; | |
745 | break; | |
746 | case 1: | |
747 | info->fir_base = 0x2f8; | |
748 | break; | |
749 | case 2: | |
750 | com = 3; | |
751 | break; | |
752 | case 3: | |
753 | com = 4; | |
754 | break; | |
755 | } | |
756 | ||
757 | if (com) { | |
758 | switch ((reg >> 6) & 0x03) { | |
759 | case 0: | |
760 | if (com == 3) | |
761 | info->fir_base = 0x3e8; | |
762 | else | |
763 | info->fir_base = 0x2e8; | |
764 | break; | |
765 | case 1: | |
766 | if (com == 3) | |
767 | info->fir_base = 0x338; | |
768 | else | |
769 | info->fir_base = 0x238; | |
770 | break; | |
771 | case 2: | |
772 | if (com == 3) | |
773 | info->fir_base = 0x2e8; | |
774 | else | |
775 | info->fir_base = 0x2e0; | |
776 | break; | |
777 | case 3: | |
778 | if (com == 3) | |
779 | info->fir_base = 0x220; | |
780 | else | |
781 | info->fir_base = 0x228; | |
782 | break; | |
783 | } | |
784 | } | |
785 | } | |
786 | info->sir_base = info->fir_base; | |
787 | ||
788 | /* Read PnP register 1 (PNP1) */ | |
789 | outb(CFG_338_PNP1, cfg_base); | |
790 | reg = inb(cfg_base+1); | |
791 | ||
792 | info->irq = reg >> 4; | |
793 | ||
794 | /* Read PnP register 3 (PNP3) */ | |
795 | outb(CFG_338_PNP3, cfg_base); | |
796 | reg = inb(cfg_base+1); | |
797 | ||
798 | info->dma = (reg & 0x07) - 1; | |
799 | ||
800 | /* Read power and test register (PTR) */ | |
801 | outb(CFG_338_PTR, cfg_base); | |
802 | reg = inb(cfg_base+1); | |
803 | ||
804 | info->suspended = reg & 0x01; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | ||
810 | /* | |
811 | * Function nsc_ircc_init_39x (chip, info) | |
812 | * | |
813 | * Now that we know it's a '39x (see probe below), we need to | |
814 | * configure it so we can use it. | |
815 | * | |
816 | * The NSC '338 chip is a Super I/O chip with a "bank" architecture, | |
817 | * the configuration of the different functionality (serial, parallel, | |
818 | * floppy...) are each in a different bank (Logical Device Number). | |
819 | * The base address, irq and dma configuration registers are common | |
820 | * to all functionalities (index 0x30 to 0x7F). | |
821 | * There is only one configuration register specific to the | |
822 | * serial port, CFG_39X_SPC. | |
823 | * JeanII | |
824 | * | |
825 | * Note : this code was written by Jan Frey <janfrey@web.de> | |
826 | */ | |
827 | static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info) | |
828 | { | |
829 | int cfg_base = info->cfg_base; | |
830 | int enabled; | |
831 | ||
832 | /* User is sure about his config... accept it. */ | |
833 | IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): " | |
834 | "io=0x%04x, irq=%d, dma=%d\n", | |
835 | __func__, info->fir_base, info->irq, info->dma); | |
836 | ||
837 | /* Access bank for SP2 */ | |
838 | outb(CFG_39X_LDN, cfg_base); | |
839 | outb(0x02, cfg_base+1); | |
840 | ||
841 | /* Configure SP2 */ | |
842 | ||
843 | /* We want to enable the device if not enabled */ | |
844 | outb(CFG_39X_ACT, cfg_base); | |
845 | enabled = inb(cfg_base+1) & 0x01; | |
846 | ||
847 | if (!enabled) { | |
848 | /* Enable the device */ | |
849 | outb(CFG_39X_SIOCF1, cfg_base); | |
850 | outb(0x01, cfg_base+1); | |
851 | /* May want to update info->enabled. Jean II */ | |
852 | } | |
853 | ||
854 | /* Enable UART bank switching (bit 7) ; Sets the chip to normal | |
855 | * power mode (wake up from sleep mode) (bit 1) */ | |
856 | outb(CFG_39X_SPC, cfg_base); | |
857 | outb(0x82, cfg_base+1); | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | /* | |
863 | * Function nsc_ircc_probe_39x (chip, info) | |
864 | * | |
865 | * Test if we really have a '39x chip at the given address | |
866 | * | |
867 | * Note : this code was written by Jan Frey <janfrey@web.de> | |
868 | */ | |
869 | static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info) | |
870 | { | |
871 | int cfg_base = info->cfg_base; | |
872 | int reg1, reg2, irq, irqt, dma1, dma2; | |
873 | int enabled, susp; | |
874 | ||
875 | IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n", | |
876 | __func__, cfg_base); | |
877 | ||
878 | /* This function should be executed with irq off to avoid | |
879 | * another driver messing with the Super I/O bank - Jean II */ | |
880 | ||
881 | /* Access bank for SP2 */ | |
882 | outb(CFG_39X_LDN, cfg_base); | |
883 | outb(0x02, cfg_base+1); | |
884 | ||
885 | /* Read infos about SP2 ; store in info struct */ | |
886 | outb(CFG_39X_BASEH, cfg_base); | |
887 | reg1 = inb(cfg_base+1); | |
888 | outb(CFG_39X_BASEL, cfg_base); | |
889 | reg2 = inb(cfg_base+1); | |
890 | info->fir_base = (reg1 << 8) | reg2; | |
891 | ||
892 | outb(CFG_39X_IRQNUM, cfg_base); | |
893 | irq = inb(cfg_base+1); | |
894 | outb(CFG_39X_IRQSEL, cfg_base); | |
895 | irqt = inb(cfg_base+1); | |
896 | info->irq = irq; | |
897 | ||
898 | outb(CFG_39X_DMA0, cfg_base); | |
899 | dma1 = inb(cfg_base+1); | |
900 | outb(CFG_39X_DMA1, cfg_base); | |
901 | dma2 = inb(cfg_base+1); | |
902 | info->dma = dma1 -1; | |
903 | ||
904 | outb(CFG_39X_ACT, cfg_base); | |
905 | info->enabled = enabled = inb(cfg_base+1) & 0x01; | |
906 | ||
907 | outb(CFG_39X_SPC, cfg_base); | |
908 | susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1); | |
909 | ||
910 | IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __func__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp); | |
911 | ||
912 | /* Configure SP2 */ | |
913 | ||
914 | /* We want to enable the device if not enabled */ | |
915 | outb(CFG_39X_ACT, cfg_base); | |
916 | enabled = inb(cfg_base+1) & 0x01; | |
917 | ||
918 | if (!enabled) { | |
919 | /* Enable the device */ | |
920 | outb(CFG_39X_SIOCF1, cfg_base); | |
921 | outb(0x01, cfg_base+1); | |
922 | /* May want to update info->enabled. Jean II */ | |
923 | } | |
924 | ||
925 | /* Enable UART bank switching (bit 7) ; Sets the chip to normal | |
926 | * power mode (wake up from sleep mode) (bit 1) */ | |
927 | outb(CFG_39X_SPC, cfg_base); | |
928 | outb(0x82, cfg_base+1); | |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
933 | #ifdef CONFIG_PNP | |
934 | /* PNP probing */ | |
935 | static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id) | |
936 | { | |
937 | memset(&pnp_info, 0, sizeof(chipio_t)); | |
938 | pnp_info.irq = -1; | |
939 | pnp_info.dma = -1; | |
940 | pnp_succeeded = 1; | |
941 | ||
942 | if (id->driver_data & NSC_FORCE_DONGLE_TYPE9) | |
943 | dongle_id = 0x9; | |
944 | ||
945 | /* There doesn't seem to be any way of getting the cfg_base. | |
946 | * On my box, cfg_base is in the PnP descriptor of the | |
947 | * motherboard. Oh well... Jean II */ | |
948 | ||
949 | if (pnp_port_valid(dev, 0) && | |
950 | !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) | |
951 | pnp_info.fir_base = pnp_port_start(dev, 0); | |
952 | ||
953 | if (pnp_irq_valid(dev, 0) && | |
954 | !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) | |
955 | pnp_info.irq = pnp_irq(dev, 0); | |
956 | ||
957 | if (pnp_dma_valid(dev, 0) && | |
958 | !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) | |
959 | pnp_info.dma = pnp_dma(dev, 0); | |
960 | ||
961 | IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n", | |
962 | __func__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma); | |
963 | ||
964 | if((pnp_info.fir_base == 0) || | |
965 | (pnp_info.irq == -1) || (pnp_info.dma == -1)) { | |
966 | /* Returning an error will disable the device. Yuck ! */ | |
967 | //return -EINVAL; | |
968 | pnp_succeeded = 0; | |
969 | } | |
970 | ||
971 | return 0; | |
972 | } | |
973 | #endif | |
974 | ||
975 | /* | |
976 | * Function nsc_ircc_setup (info) | |
977 | * | |
978 | * Returns non-negative on success. | |
979 | * | |
980 | */ | |
981 | static int nsc_ircc_setup(chipio_t *info) | |
982 | { | |
983 | int version; | |
984 | int iobase = info->fir_base; | |
985 | ||
986 | /* Read the Module ID */ | |
987 | switch_bank(iobase, BANK3); | |
988 | version = inb(iobase+MID); | |
989 | ||
990 | IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n", | |
991 | __func__, driver_name, version); | |
992 | ||
993 | /* Should be 0x2? */ | |
994 | if (0x20 != (version & 0xf0)) { | |
995 | IRDA_ERROR("%s, Wrong chip version %02x\n", | |
996 | driver_name, version); | |
997 | return -1; | |
998 | } | |
999 | ||
1000 | /* Switch to advanced mode */ | |
1001 | switch_bank(iobase, BANK2); | |
1002 | outb(ECR1_EXT_SL, iobase+ECR1); | |
1003 | switch_bank(iobase, BANK0); | |
1004 | ||
1005 | /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */ | |
1006 | switch_bank(iobase, BANK0); | |
1007 | outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR); | |
1008 | ||
1009 | outb(0x03, iobase+LCR); /* 8 bit word length */ | |
1010 | outb(MCR_SIR, iobase+MCR); /* Start at SIR-mode, also clears LSR*/ | |
1011 | ||
1012 | /* Set FIFO size to 32 */ | |
1013 | switch_bank(iobase, BANK2); | |
1014 | outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); | |
1015 | ||
1016 | /* IRCR2: FEND_MD is not set */ | |
1017 | switch_bank(iobase, BANK5); | |
1018 | outb(0x02, iobase+4); | |
1019 | ||
1020 | /* Make sure that some defaults are OK */ | |
1021 | switch_bank(iobase, BANK6); | |
1022 | outb(0x20, iobase+0); /* Set 32 bits FIR CRC */ | |
1023 | outb(0x0a, iobase+1); /* Set MIR pulse width */ | |
1024 | outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */ | |
1025 | outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */ | |
1026 | ||
1027 | /* Enable receive interrupts */ | |
1028 | switch_bank(iobase, BANK0); | |
1029 | outb(IER_RXHDL_IE, iobase+IER); | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Function nsc_ircc_read_dongle_id (void) | |
1036 | * | |
1037 | * Try to read dongle indentification. This procedure needs to be executed | |
1038 | * once after power-on/reset. It also needs to be used whenever you suspect | |
1039 | * that the user may have plugged/unplugged the IrDA Dongle. | |
1040 | */ | |
1041 | static int nsc_ircc_read_dongle_id (int iobase) | |
1042 | { | |
1043 | int dongle_id; | |
1044 | __u8 bank; | |
1045 | ||
1046 | bank = inb(iobase+BSR); | |
1047 | ||
1048 | /* Select Bank 7 */ | |
1049 | switch_bank(iobase, BANK7); | |
1050 | ||
1051 | /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */ | |
1052 | outb(0x00, iobase+7); | |
1053 | ||
1054 | /* ID0, 1, and 2 are pulled up/down very slowly */ | |
1055 | udelay(50); | |
1056 | ||
1057 | /* IRCFG1: read the ID bits */ | |
1058 | dongle_id = inb(iobase+4) & 0x0f; | |
1059 | ||
1060 | #ifdef BROKEN_DONGLE_ID | |
1061 | if (dongle_id == 0x0a) | |
1062 | dongle_id = 0x09; | |
1063 | #endif | |
1064 | /* Go back to bank 0 before returning */ | |
1065 | switch_bank(iobase, BANK0); | |
1066 | ||
1067 | outb(bank, iobase+BSR); | |
1068 | ||
1069 | return dongle_id; | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Function nsc_ircc_init_dongle_interface (iobase, dongle_id) | |
1074 | * | |
1075 | * This function initializes the dongle for the transceiver that is | |
1076 | * used. This procedure needs to be executed once after | |
1077 | * power-on/reset. It also needs to be used whenever you suspect that | |
1078 | * the dongle is changed. | |
1079 | */ | |
1080 | static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id) | |
1081 | { | |
1082 | int bank; | |
1083 | ||
1084 | /* Save current bank */ | |
1085 | bank = inb(iobase+BSR); | |
1086 | ||
1087 | /* Select Bank 7 */ | |
1088 | switch_bank(iobase, BANK7); | |
1089 | ||
1090 | /* IRCFG4: set according to dongle_id */ | |
1091 | switch (dongle_id) { | |
1092 | case 0x00: /* same as */ | |
1093 | case 0x01: /* Differential serial interface */ | |
1094 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1095 | __func__, dongle_types[dongle_id]); | |
1096 | break; | |
1097 | case 0x02: /* same as */ | |
1098 | case 0x03: /* Reserved */ | |
1099 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1100 | __func__, dongle_types[dongle_id]); | |
1101 | break; | |
1102 | case 0x04: /* Sharp RY5HD01 */ | |
1103 | break; | |
1104 | case 0x05: /* Reserved, but this is what the Thinkpad reports */ | |
1105 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1106 | __func__, dongle_types[dongle_id]); | |
1107 | break; | |
1108 | case 0x06: /* Single-ended serial interface */ | |
1109 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1110 | __func__, dongle_types[dongle_id]); | |
1111 | break; | |
1112 | case 0x07: /* Consumer-IR only */ | |
1113 | IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", | |
1114 | __func__, dongle_types[dongle_id]); | |
1115 | break; | |
1116 | case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ | |
1117 | IRDA_DEBUG(0, "%s(), %s\n", | |
1118 | __func__, dongle_types[dongle_id]); | |
1119 | break; | |
1120 | case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ | |
1121 | outb(0x28, iobase+7); /* Set irsl[0-2] as output */ | |
1122 | break; | |
1123 | case 0x0A: /* same as */ | |
1124 | case 0x0B: /* Reserved */ | |
1125 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1126 | __func__, dongle_types[dongle_id]); | |
1127 | break; | |
1128 | case 0x0C: /* same as */ | |
1129 | case 0x0D: /* HP HSDL-1100/HSDL-2100 */ | |
1130 | /* | |
1131 | * Set irsl0 as input, irsl[1-2] as output, and separate | |
1132 | * inputs are used for SIR and MIR/FIR | |
1133 | */ | |
1134 | outb(0x48, iobase+7); | |
1135 | break; | |
1136 | case 0x0E: /* Supports SIR Mode only */ | |
1137 | outb(0x28, iobase+7); /* Set irsl[0-2] as output */ | |
1138 | break; | |
1139 | case 0x0F: /* No dongle connected */ | |
1140 | IRDA_DEBUG(0, "%s(), %s\n", | |
1141 | __func__, dongle_types[dongle_id]); | |
1142 | ||
1143 | switch_bank(iobase, BANK0); | |
1144 | outb(0x62, iobase+MCR); | |
1145 | break; | |
1146 | default: | |
1147 | IRDA_DEBUG(0, "%s(), invalid dongle_id %#x", | |
1148 | __func__, dongle_id); | |
1149 | } | |
1150 | ||
1151 | /* IRCFG1: IRSL1 and 2 are set to IrDA mode */ | |
1152 | outb(0x00, iobase+4); | |
1153 | ||
1154 | /* Restore bank register */ | |
1155 | outb(bank, iobase+BSR); | |
1156 | ||
1157 | } /* set_up_dongle_interface */ | |
1158 | ||
1159 | /* | |
1160 | * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id) | |
1161 | * | |
1162 | * Change speed of the attach dongle | |
1163 | * | |
1164 | */ | |
1165 | static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id) | |
1166 | { | |
1167 | __u8 bank; | |
1168 | ||
1169 | /* Save current bank */ | |
1170 | bank = inb(iobase+BSR); | |
1171 | ||
1172 | /* Select Bank 7 */ | |
1173 | switch_bank(iobase, BANK7); | |
1174 | ||
1175 | /* IRCFG1: set according to dongle_id */ | |
1176 | switch (dongle_id) { | |
1177 | case 0x00: /* same as */ | |
1178 | case 0x01: /* Differential serial interface */ | |
1179 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1180 | __func__, dongle_types[dongle_id]); | |
1181 | break; | |
1182 | case 0x02: /* same as */ | |
1183 | case 0x03: /* Reserved */ | |
1184 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1185 | __func__, dongle_types[dongle_id]); | |
1186 | break; | |
1187 | case 0x04: /* Sharp RY5HD01 */ | |
1188 | break; | |
1189 | case 0x05: /* Reserved */ | |
1190 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1191 | __func__, dongle_types[dongle_id]); | |
1192 | break; | |
1193 | case 0x06: /* Single-ended serial interface */ | |
1194 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1195 | __func__, dongle_types[dongle_id]); | |
1196 | break; | |
1197 | case 0x07: /* Consumer-IR only */ | |
1198 | IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", | |
1199 | __func__, dongle_types[dongle_id]); | |
1200 | break; | |
1201 | case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ | |
1202 | IRDA_DEBUG(0, "%s(), %s\n", | |
1203 | __func__, dongle_types[dongle_id]); | |
1204 | outb(0x00, iobase+4); | |
1205 | if (speed > 115200) | |
1206 | outb(0x01, iobase+4); | |
1207 | break; | |
1208 | case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ | |
1209 | outb(0x01, iobase+4); | |
1210 | ||
1211 | if (speed == 4000000) { | |
1212 | /* There was a cli() there, but we now are already | |
1213 | * under spin_lock_irqsave() - JeanII */ | |
1214 | outb(0x81, iobase+4); | |
1215 | outb(0x80, iobase+4); | |
1216 | } else | |
1217 | outb(0x00, iobase+4); | |
1218 | break; | |
1219 | case 0x0A: /* same as */ | |
1220 | case 0x0B: /* Reserved */ | |
1221 | IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", | |
1222 | __func__, dongle_types[dongle_id]); | |
1223 | break; | |
1224 | case 0x0C: /* same as */ | |
1225 | case 0x0D: /* HP HSDL-1100/HSDL-2100 */ | |
1226 | break; | |
1227 | case 0x0E: /* Supports SIR Mode only */ | |
1228 | break; | |
1229 | case 0x0F: /* No dongle connected */ | |
1230 | IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", | |
1231 | __func__, dongle_types[dongle_id]); | |
1232 | ||
1233 | switch_bank(iobase, BANK0); | |
1234 | outb(0x62, iobase+MCR); | |
1235 | break; | |
1236 | default: | |
1237 | IRDA_DEBUG(0, "%s(), invalid data_rate\n", __func__); | |
1238 | } | |
1239 | /* Restore bank register */ | |
1240 | outb(bank, iobase+BSR); | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Function nsc_ircc_change_speed (self, baud) | |
1245 | * | |
1246 | * Change the speed of the device | |
1247 | * | |
1248 | * This function *must* be called with irq off and spin-lock. | |
1249 | */ | |
1250 | static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed) | |
1251 | { | |
1252 | struct net_device *dev = self->netdev; | |
1253 | __u8 mcr = MCR_SIR; | |
1254 | int iobase; | |
1255 | __u8 bank; | |
1256 | __u8 ier; /* Interrupt enable register */ | |
1257 | ||
1258 | IRDA_DEBUG(2, "%s(), speed=%d\n", __func__, speed); | |
1259 | ||
1260 | IRDA_ASSERT(self != NULL, return 0;); | |
1261 | ||
1262 | iobase = self->io.fir_base; | |
1263 | ||
1264 | /* Update accounting for new speed */ | |
1265 | self->io.speed = speed; | |
1266 | ||
1267 | /* Save current bank */ | |
1268 | bank = inb(iobase+BSR); | |
1269 | ||
1270 | /* Disable interrupts */ | |
1271 | switch_bank(iobase, BANK0); | |
1272 | outb(0, iobase+IER); | |
1273 | ||
1274 | /* Select Bank 2 */ | |
1275 | switch_bank(iobase, BANK2); | |
1276 | ||
1277 | outb(0x00, iobase+BGDH); | |
1278 | switch (speed) { | |
1279 | case 9600: outb(0x0c, iobase+BGDL); break; | |
1280 | case 19200: outb(0x06, iobase+BGDL); break; | |
1281 | case 38400: outb(0x03, iobase+BGDL); break; | |
1282 | case 57600: outb(0x02, iobase+BGDL); break; | |
1283 | case 115200: outb(0x01, iobase+BGDL); break; | |
1284 | case 576000: | |
1285 | switch_bank(iobase, BANK5); | |
1286 | ||
1287 | /* IRCR2: MDRS is set */ | |
1288 | outb(inb(iobase+4) | 0x04, iobase+4); | |
1289 | ||
1290 | mcr = MCR_MIR; | |
1291 | IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__); | |
1292 | break; | |
1293 | case 1152000: | |
1294 | mcr = MCR_MIR; | |
1295 | IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__); | |
1296 | break; | |
1297 | case 4000000: | |
1298 | mcr = MCR_FIR; | |
1299 | IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__); | |
1300 | break; | |
1301 | default: | |
1302 | mcr = MCR_FIR; | |
1303 | IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", | |
1304 | __func__, speed); | |
1305 | break; | |
1306 | } | |
1307 | ||
1308 | /* Set appropriate speed mode */ | |
1309 | switch_bank(iobase, BANK0); | |
1310 | outb(mcr | MCR_TX_DFR, iobase+MCR); | |
1311 | ||
1312 | /* Give some hits to the transceiver */ | |
1313 | nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id); | |
1314 | ||
1315 | /* Set FIFO threshold to TX17, RX16 */ | |
1316 | switch_bank(iobase, BANK0); | |
1317 | outb(0x00, iobase+FCR); | |
1318 | outb(FCR_FIFO_EN, iobase+FCR); | |
1319 | outb(FCR_RXTH| /* Set Rx FIFO threshold */ | |
1320 | FCR_TXTH| /* Set Tx FIFO threshold */ | |
1321 | FCR_TXSR| /* Reset Tx FIFO */ | |
1322 | FCR_RXSR| /* Reset Rx FIFO */ | |
1323 | FCR_FIFO_EN, /* Enable FIFOs */ | |
1324 | iobase+FCR); | |
1325 | ||
1326 | /* Set FIFO size to 32 */ | |
1327 | switch_bank(iobase, BANK2); | |
1328 | outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); | |
1329 | ||
1330 | /* Enable some interrupts so we can receive frames */ | |
1331 | switch_bank(iobase, BANK0); | |
1332 | if (speed > 115200) { | |
1333 | /* Install FIR xmit handler */ | |
1334 | dev->netdev_ops = &nsc_ircc_fir_ops; | |
1335 | ier = IER_SFIF_IE; | |
1336 | nsc_ircc_dma_receive(self); | |
1337 | } else { | |
1338 | /* Install SIR xmit handler */ | |
1339 | dev->netdev_ops = &nsc_ircc_sir_ops; | |
1340 | ier = IER_RXHDL_IE; | |
1341 | } | |
1342 | /* Set our current interrupt mask */ | |
1343 | outb(ier, iobase+IER); | |
1344 | ||
1345 | /* Restore BSR */ | |
1346 | outb(bank, iobase+BSR); | |
1347 | ||
1348 | /* Make sure interrupt handlers keep the proper interrupt mask */ | |
1349 | return(ier); | |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * Function nsc_ircc_hard_xmit (skb, dev) | |
1354 | * | |
1355 | * Transmit the frame! | |
1356 | * | |
1357 | */ | |
1358 | static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev) | |
1359 | { | |
1360 | struct nsc_ircc_cb *self; | |
1361 | unsigned long flags; | |
1362 | int iobase; | |
1363 | __s32 speed; | |
1364 | __u8 bank; | |
1365 | ||
1366 | self = netdev_priv(dev); | |
1367 | ||
1368 | IRDA_ASSERT(self != NULL, return 0;); | |
1369 | ||
1370 | iobase = self->io.fir_base; | |
1371 | ||
1372 | netif_stop_queue(dev); | |
1373 | ||
1374 | /* Make sure tests *& speed change are atomic */ | |
1375 | spin_lock_irqsave(&self->lock, flags); | |
1376 | ||
1377 | /* Check if we need to change the speed */ | |
1378 | speed = irda_get_next_speed(skb); | |
1379 | if ((speed != self->io.speed) && (speed != -1)) { | |
1380 | /* Check for empty frame. */ | |
1381 | if (!skb->len) { | |
1382 | /* If we just sent a frame, we get called before | |
1383 | * the last bytes get out (because of the SIR FIFO). | |
1384 | * If this is the case, let interrupt handler change | |
1385 | * the speed itself... Jean II */ | |
1386 | if (self->io.direction == IO_RECV) { | |
1387 | nsc_ircc_change_speed(self, speed); | |
1388 | /* TODO : For SIR->SIR, the next packet | |
1389 | * may get corrupted - Jean II */ | |
1390 | netif_wake_queue(dev); | |
1391 | } else { | |
1392 | self->new_speed = speed; | |
1393 | /* Queue will be restarted after speed change | |
1394 | * to make sure packets gets through the | |
1395 | * proper xmit handler - Jean II */ | |
1396 | } | |
1397 | dev->trans_start = jiffies; | |
1398 | spin_unlock_irqrestore(&self->lock, flags); | |
1399 | dev_kfree_skb(skb); | |
1400 | return NETDEV_TX_OK; | |
1401 | } else | |
1402 | self->new_speed = speed; | |
1403 | } | |
1404 | ||
1405 | /* Save current bank */ | |
1406 | bank = inb(iobase+BSR); | |
1407 | ||
1408 | self->tx_buff.data = self->tx_buff.head; | |
1409 | ||
1410 | self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, | |
1411 | self->tx_buff.truesize); | |
1412 | ||
1413 | dev->stats.tx_bytes += self->tx_buff.len; | |
1414 | ||
1415 | /* Add interrupt on tx low level (will fire immediately) */ | |
1416 | switch_bank(iobase, BANK0); | |
1417 | outb(IER_TXLDL_IE, iobase+IER); | |
1418 | ||
1419 | /* Restore bank register */ | |
1420 | outb(bank, iobase+BSR); | |
1421 | ||
1422 | dev->trans_start = jiffies; | |
1423 | spin_unlock_irqrestore(&self->lock, flags); | |
1424 | ||
1425 | dev_kfree_skb(skb); | |
1426 | ||
1427 | return NETDEV_TX_OK; | |
1428 | } | |
1429 | ||
1430 | static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev) | |
1431 | { | |
1432 | struct nsc_ircc_cb *self; | |
1433 | unsigned long flags; | |
1434 | int iobase; | |
1435 | __s32 speed; | |
1436 | __u8 bank; | |
1437 | int mtt, diff; | |
1438 | ||
1439 | self = netdev_priv(dev); | |
1440 | iobase = self->io.fir_base; | |
1441 | ||
1442 | netif_stop_queue(dev); | |
1443 | ||
1444 | /* Make sure tests *& speed change are atomic */ | |
1445 | spin_lock_irqsave(&self->lock, flags); | |
1446 | ||
1447 | /* Check if we need to change the speed */ | |
1448 | speed = irda_get_next_speed(skb); | |
1449 | if ((speed != self->io.speed) && (speed != -1)) { | |
1450 | /* Check for empty frame. */ | |
1451 | if (!skb->len) { | |
1452 | /* If we are currently transmitting, defer to | |
1453 | * interrupt handler. - Jean II */ | |
1454 | if(self->tx_fifo.len == 0) { | |
1455 | nsc_ircc_change_speed(self, speed); | |
1456 | netif_wake_queue(dev); | |
1457 | } else { | |
1458 | self->new_speed = speed; | |
1459 | /* Keep queue stopped : | |
1460 | * the speed change operation may change the | |
1461 | * xmit handler, and we want to make sure | |
1462 | * the next packet get through the proper | |
1463 | * Tx path, so block the Tx queue until | |
1464 | * the speed change has been done. | |
1465 | * Jean II */ | |
1466 | } | |
1467 | dev->trans_start = jiffies; | |
1468 | spin_unlock_irqrestore(&self->lock, flags); | |
1469 | dev_kfree_skb(skb); | |
1470 | return NETDEV_TX_OK; | |
1471 | } else { | |
1472 | /* Change speed after current frame */ | |
1473 | self->new_speed = speed; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | /* Save current bank */ | |
1478 | bank = inb(iobase+BSR); | |
1479 | ||
1480 | /* Register and copy this frame to DMA memory */ | |
1481 | self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail; | |
1482 | self->tx_fifo.queue[self->tx_fifo.free].len = skb->len; | |
1483 | self->tx_fifo.tail += skb->len; | |
1484 | ||
1485 | dev->stats.tx_bytes += skb->len; | |
1486 | ||
1487 | skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start, | |
1488 | skb->len); | |
1489 | self->tx_fifo.len++; | |
1490 | self->tx_fifo.free++; | |
1491 | ||
1492 | /* Start transmit only if there is currently no transmit going on */ | |
1493 | if (self->tx_fifo.len == 1) { | |
1494 | /* Check if we must wait the min turn time or not */ | |
1495 | mtt = irda_get_mtt(skb); | |
1496 | if (mtt) { | |
1497 | /* Check how much time we have used already */ | |
1498 | do_gettimeofday(&self->now); | |
1499 | diff = self->now.tv_usec - self->stamp.tv_usec; | |
1500 | if (diff < 0) | |
1501 | diff += 1000000; | |
1502 | ||
1503 | /* Check if the mtt is larger than the time we have | |
1504 | * already used by all the protocol processing | |
1505 | */ | |
1506 | if (mtt > diff) { | |
1507 | mtt -= diff; | |
1508 | ||
1509 | /* | |
1510 | * Use timer if delay larger than 125 us, and | |
1511 | * use udelay for smaller values which should | |
1512 | * be acceptable | |
1513 | */ | |
1514 | if (mtt > 125) { | |
1515 | /* Adjust for timer resolution */ | |
1516 | mtt = mtt / 125; | |
1517 | ||
1518 | /* Setup timer */ | |
1519 | switch_bank(iobase, BANK4); | |
1520 | outb(mtt & 0xff, iobase+TMRL); | |
1521 | outb((mtt >> 8) & 0x0f, iobase+TMRH); | |
1522 | ||
1523 | /* Start timer */ | |
1524 | outb(IRCR1_TMR_EN, iobase+IRCR1); | |
1525 | self->io.direction = IO_XMIT; | |
1526 | ||
1527 | /* Enable timer interrupt */ | |
1528 | switch_bank(iobase, BANK0); | |
1529 | outb(IER_TMR_IE, iobase+IER); | |
1530 | ||
1531 | /* Timer will take care of the rest */ | |
1532 | goto out; | |
1533 | } else | |
1534 | udelay(mtt); | |
1535 | } | |
1536 | } | |
1537 | /* Enable DMA interrupt */ | |
1538 | switch_bank(iobase, BANK0); | |
1539 | outb(IER_DMA_IE, iobase+IER); | |
1540 | ||
1541 | /* Transmit frame */ | |
1542 | nsc_ircc_dma_xmit(self, iobase); | |
1543 | } | |
1544 | out: | |
1545 | /* Not busy transmitting anymore if window is not full, | |
1546 | * and if we don't need to change speed */ | |
1547 | if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) | |
1548 | netif_wake_queue(self->netdev); | |
1549 | ||
1550 | /* Restore bank register */ | |
1551 | outb(bank, iobase+BSR); | |
1552 | ||
1553 | dev->trans_start = jiffies; | |
1554 | spin_unlock_irqrestore(&self->lock, flags); | |
1555 | dev_kfree_skb(skb); | |
1556 | ||
1557 | return NETDEV_TX_OK; | |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * Function nsc_ircc_dma_xmit (self, iobase) | |
1562 | * | |
1563 | * Transmit data using DMA | |
1564 | * | |
1565 | */ | |
1566 | static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase) | |
1567 | { | |
1568 | int bsr; | |
1569 | ||
1570 | /* Save current bank */ | |
1571 | bsr = inb(iobase+BSR); | |
1572 | ||
1573 | /* Disable DMA */ | |
1574 | switch_bank(iobase, BANK0); | |
1575 | outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); | |
1576 | ||
1577 | self->io.direction = IO_XMIT; | |
1578 | ||
1579 | /* Choose transmit DMA channel */ | |
1580 | switch_bank(iobase, BANK2); | |
1581 | outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); | |
1582 | ||
1583 | irda_setup_dma(self->io.dma, | |
1584 | ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start - | |
1585 | self->tx_buff.head) + self->tx_buff_dma, | |
1586 | self->tx_fifo.queue[self->tx_fifo.ptr].len, | |
1587 | DMA_TX_MODE); | |
1588 | ||
1589 | /* Enable DMA and SIR interaction pulse */ | |
1590 | switch_bank(iobase, BANK0); | |
1591 | outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR); | |
1592 | ||
1593 | /* Restore bank register */ | |
1594 | outb(bsr, iobase+BSR); | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * Function nsc_ircc_pio_xmit (self, iobase) | |
1599 | * | |
1600 | * Transmit data using PIO. Returns the number of bytes that actually | |
1601 | * got transferred | |
1602 | * | |
1603 | */ | |
1604 | static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size) | |
1605 | { | |
1606 | int actual = 0; | |
1607 | __u8 bank; | |
1608 | ||
1609 | IRDA_DEBUG(4, "%s()\n", __func__); | |
1610 | ||
1611 | /* Save current bank */ | |
1612 | bank = inb(iobase+BSR); | |
1613 | ||
1614 | switch_bank(iobase, BANK0); | |
1615 | if (!(inb_p(iobase+LSR) & LSR_TXEMP)) { | |
1616 | IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n", | |
1617 | __func__); | |
1618 | ||
1619 | /* FIFO may still be filled to the Tx interrupt threshold */ | |
1620 | fifo_size -= 17; | |
1621 | } | |
1622 | ||
1623 | /* Fill FIFO with current frame */ | |
1624 | while ((fifo_size-- > 0) && (actual < len)) { | |
1625 | /* Transmit next byte */ | |
1626 | outb(buf[actual++], iobase+TXD); | |
1627 | } | |
1628 | ||
1629 | IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n", | |
1630 | __func__, fifo_size, actual, len); | |
1631 | ||
1632 | /* Restore bank */ | |
1633 | outb(bank, iobase+BSR); | |
1634 | ||
1635 | return actual; | |
1636 | } | |
1637 | ||
1638 | /* | |
1639 | * Function nsc_ircc_dma_xmit_complete (self) | |
1640 | * | |
1641 | * The transfer of a frame in finished. This function will only be called | |
1642 | * by the interrupt handler | |
1643 | * | |
1644 | */ | |
1645 | static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self) | |
1646 | { | |
1647 | int iobase; | |
1648 | __u8 bank; | |
1649 | int ret = TRUE; | |
1650 | ||
1651 | IRDA_DEBUG(2, "%s()\n", __func__); | |
1652 | ||
1653 | iobase = self->io.fir_base; | |
1654 | ||
1655 | /* Save current bank */ | |
1656 | bank = inb(iobase+BSR); | |
1657 | ||
1658 | /* Disable DMA */ | |
1659 | switch_bank(iobase, BANK0); | |
1660 | outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); | |
1661 | ||
1662 | /* Check for underrrun! */ | |
1663 | if (inb(iobase+ASCR) & ASCR_TXUR) { | |
1664 | self->netdev->stats.tx_errors++; | |
1665 | self->netdev->stats.tx_fifo_errors++; | |
1666 | ||
1667 | /* Clear bit, by writing 1 into it */ | |
1668 | outb(ASCR_TXUR, iobase+ASCR); | |
1669 | } else { | |
1670 | self->netdev->stats.tx_packets++; | |
1671 | } | |
1672 | ||
1673 | /* Finished with this frame, so prepare for next */ | |
1674 | self->tx_fifo.ptr++; | |
1675 | self->tx_fifo.len--; | |
1676 | ||
1677 | /* Any frames to be sent back-to-back? */ | |
1678 | if (self->tx_fifo.len) { | |
1679 | nsc_ircc_dma_xmit(self, iobase); | |
1680 | ||
1681 | /* Not finished yet! */ | |
1682 | ret = FALSE; | |
1683 | } else { | |
1684 | /* Reset Tx FIFO info */ | |
1685 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; | |
1686 | self->tx_fifo.tail = self->tx_buff.head; | |
1687 | } | |
1688 | ||
1689 | /* Make sure we have room for more frames and | |
1690 | * that we don't need to change speed */ | |
1691 | if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) { | |
1692 | /* Not busy transmitting anymore */ | |
1693 | /* Tell the network layer, that we can accept more frames */ | |
1694 | netif_wake_queue(self->netdev); | |
1695 | } | |
1696 | ||
1697 | /* Restore bank */ | |
1698 | outb(bank, iobase+BSR); | |
1699 | ||
1700 | return ret; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * Function nsc_ircc_dma_receive (self) | |
1705 | * | |
1706 | * Get ready for receiving a frame. The device will initiate a DMA | |
1707 | * if it starts to receive a frame. | |
1708 | * | |
1709 | */ | |
1710 | static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self) | |
1711 | { | |
1712 | int iobase; | |
1713 | __u8 bsr; | |
1714 | ||
1715 | iobase = self->io.fir_base; | |
1716 | ||
1717 | /* Reset Tx FIFO info */ | |
1718 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; | |
1719 | self->tx_fifo.tail = self->tx_buff.head; | |
1720 | ||
1721 | /* Save current bank */ | |
1722 | bsr = inb(iobase+BSR); | |
1723 | ||
1724 | /* Disable DMA */ | |
1725 | switch_bank(iobase, BANK0); | |
1726 | outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); | |
1727 | ||
1728 | /* Choose DMA Rx, DMA Fairness, and Advanced mode */ | |
1729 | switch_bank(iobase, BANK2); | |
1730 | outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); | |
1731 | ||
1732 | self->io.direction = IO_RECV; | |
1733 | self->rx_buff.data = self->rx_buff.head; | |
1734 | ||
1735 | /* Reset Rx FIFO. This will also flush the ST_FIFO */ | |
1736 | switch_bank(iobase, BANK0); | |
1737 | outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR); | |
1738 | ||
1739 | self->st_fifo.len = self->st_fifo.pending_bytes = 0; | |
1740 | self->st_fifo.tail = self->st_fifo.head = 0; | |
1741 | ||
1742 | irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize, | |
1743 | DMA_RX_MODE); | |
1744 | ||
1745 | /* Enable DMA */ | |
1746 | switch_bank(iobase, BANK0); | |
1747 | outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR); | |
1748 | ||
1749 | /* Restore bank register */ | |
1750 | outb(bsr, iobase+BSR); | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | /* | |
1756 | * Function nsc_ircc_dma_receive_complete (self) | |
1757 | * | |
1758 | * Finished with receiving frames | |
1759 | * | |
1760 | * | |
1761 | */ | |
1762 | static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase) | |
1763 | { | |
1764 | struct st_fifo *st_fifo; | |
1765 | struct sk_buff *skb; | |
1766 | __u8 status; | |
1767 | __u8 bank; | |
1768 | int len; | |
1769 | ||
1770 | st_fifo = &self->st_fifo; | |
1771 | ||
1772 | /* Save current bank */ | |
1773 | bank = inb(iobase+BSR); | |
1774 | ||
1775 | /* Read all entries in status FIFO */ | |
1776 | switch_bank(iobase, BANK5); | |
1777 | while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) { | |
1778 | /* We must empty the status FIFO no matter what */ | |
1779 | len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8); | |
1780 | ||
1781 | if (st_fifo->tail >= MAX_RX_WINDOW) { | |
1782 | IRDA_DEBUG(0, "%s(), window is full!\n", __func__); | |
1783 | continue; | |
1784 | } | |
1785 | ||
1786 | st_fifo->entries[st_fifo->tail].status = status; | |
1787 | st_fifo->entries[st_fifo->tail].len = len; | |
1788 | st_fifo->pending_bytes += len; | |
1789 | st_fifo->tail++; | |
1790 | st_fifo->len++; | |
1791 | } | |
1792 | /* Try to process all entries in status FIFO */ | |
1793 | while (st_fifo->len > 0) { | |
1794 | /* Get first entry */ | |
1795 | status = st_fifo->entries[st_fifo->head].status; | |
1796 | len = st_fifo->entries[st_fifo->head].len; | |
1797 | st_fifo->pending_bytes -= len; | |
1798 | st_fifo->head++; | |
1799 | st_fifo->len--; | |
1800 | ||
1801 | /* Check for errors */ | |
1802 | if (status & FRM_ST_ERR_MSK) { | |
1803 | if (status & FRM_ST_LOST_FR) { | |
1804 | /* Add number of lost frames to stats */ | |
1805 | self->netdev->stats.rx_errors += len; | |
1806 | } else { | |
1807 | /* Skip frame */ | |
1808 | self->netdev->stats.rx_errors++; | |
1809 | ||
1810 | self->rx_buff.data += len; | |
1811 | ||
1812 | if (status & FRM_ST_MAX_LEN) | |
1813 | self->netdev->stats.rx_length_errors++; | |
1814 | ||
1815 | if (status & FRM_ST_PHY_ERR) | |
1816 | self->netdev->stats.rx_frame_errors++; | |
1817 | ||
1818 | if (status & FRM_ST_BAD_CRC) | |
1819 | self->netdev->stats.rx_crc_errors++; | |
1820 | } | |
1821 | /* The errors below can be reported in both cases */ | |
1822 | if (status & FRM_ST_OVR1) | |
1823 | self->netdev->stats.rx_fifo_errors++; | |
1824 | ||
1825 | if (status & FRM_ST_OVR2) | |
1826 | self->netdev->stats.rx_fifo_errors++; | |
1827 | } else { | |
1828 | /* | |
1829 | * First we must make sure that the frame we | |
1830 | * want to deliver is all in main memory. If we | |
1831 | * cannot tell, then we check if the Rx FIFO is | |
1832 | * empty. If not then we will have to take a nap | |
1833 | * and try again later. | |
1834 | */ | |
1835 | if (st_fifo->pending_bytes < self->io.fifo_size) { | |
1836 | switch_bank(iobase, BANK0); | |
1837 | if (inb(iobase+LSR) & LSR_RXDA) { | |
1838 | /* Put this entry back in fifo */ | |
1839 | st_fifo->head--; | |
1840 | st_fifo->len++; | |
1841 | st_fifo->pending_bytes += len; | |
1842 | st_fifo->entries[st_fifo->head].status = status; | |
1843 | st_fifo->entries[st_fifo->head].len = len; | |
1844 | /* | |
1845 | * DMA not finished yet, so try again | |
1846 | * later, set timer value, resolution | |
1847 | * 125 us | |
1848 | */ | |
1849 | switch_bank(iobase, BANK4); | |
1850 | outb(0x02, iobase+TMRL); /* x 125 us */ | |
1851 | outb(0x00, iobase+TMRH); | |
1852 | ||
1853 | /* Start timer */ | |
1854 | outb(IRCR1_TMR_EN, iobase+IRCR1); | |
1855 | ||
1856 | /* Restore bank register */ | |
1857 | outb(bank, iobase+BSR); | |
1858 | ||
1859 | return FALSE; /* I'll be back! */ | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * Remember the time we received this frame, so we can | |
1865 | * reduce the min turn time a bit since we will know | |
1866 | * how much time we have used for protocol processing | |
1867 | */ | |
1868 | do_gettimeofday(&self->stamp); | |
1869 | ||
1870 | skb = dev_alloc_skb(len+1); | |
1871 | if (skb == NULL) { | |
1872 | IRDA_WARNING("%s(), memory squeeze, " | |
1873 | "dropping frame.\n", | |
1874 | __func__); | |
1875 | self->netdev->stats.rx_dropped++; | |
1876 | ||
1877 | /* Restore bank register */ | |
1878 | outb(bank, iobase+BSR); | |
1879 | ||
1880 | return FALSE; | |
1881 | } | |
1882 | ||
1883 | /* Make sure IP header gets aligned */ | |
1884 | skb_reserve(skb, 1); | |
1885 | ||
1886 | /* Copy frame without CRC */ | |
1887 | if (self->io.speed < 4000000) { | |
1888 | skb_put(skb, len-2); | |
1889 | skb_copy_to_linear_data(skb, | |
1890 | self->rx_buff.data, | |
1891 | len - 2); | |
1892 | } else { | |
1893 | skb_put(skb, len-4); | |
1894 | skb_copy_to_linear_data(skb, | |
1895 | self->rx_buff.data, | |
1896 | len - 4); | |
1897 | } | |
1898 | ||
1899 | /* Move to next frame */ | |
1900 | self->rx_buff.data += len; | |
1901 | self->netdev->stats.rx_bytes += len; | |
1902 | self->netdev->stats.rx_packets++; | |
1903 | ||
1904 | skb->dev = self->netdev; | |
1905 | skb_reset_mac_header(skb); | |
1906 | skb->protocol = htons(ETH_P_IRDA); | |
1907 | netif_rx(skb); | |
1908 | } | |
1909 | } | |
1910 | /* Restore bank register */ | |
1911 | outb(bank, iobase+BSR); | |
1912 | ||
1913 | return TRUE; | |
1914 | } | |
1915 | ||
1916 | /* | |
1917 | * Function nsc_ircc_pio_receive (self) | |
1918 | * | |
1919 | * Receive all data in receiver FIFO | |
1920 | * | |
1921 | */ | |
1922 | static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self) | |
1923 | { | |
1924 | __u8 byte; | |
1925 | int iobase; | |
1926 | ||
1927 | iobase = self->io.fir_base; | |
1928 | ||
1929 | /* Receive all characters in Rx FIFO */ | |
1930 | do { | |
1931 | byte = inb(iobase+RXD); | |
1932 | async_unwrap_char(self->netdev, &self->netdev->stats, | |
1933 | &self->rx_buff, byte); | |
1934 | } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */ | |
1935 | } | |
1936 | ||
1937 | /* | |
1938 | * Function nsc_ircc_sir_interrupt (self, eir) | |
1939 | * | |
1940 | * Handle SIR interrupt | |
1941 | * | |
1942 | */ | |
1943 | static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir) | |
1944 | { | |
1945 | int actual; | |
1946 | ||
1947 | /* Check if transmit FIFO is low on data */ | |
1948 | if (eir & EIR_TXLDL_EV) { | |
1949 | /* Write data left in transmit buffer */ | |
1950 | actual = nsc_ircc_pio_write(self->io.fir_base, | |
1951 | self->tx_buff.data, | |
1952 | self->tx_buff.len, | |
1953 | self->io.fifo_size); | |
1954 | self->tx_buff.data += actual; | |
1955 | self->tx_buff.len -= actual; | |
1956 | ||
1957 | self->io.direction = IO_XMIT; | |
1958 | ||
1959 | /* Check if finished */ | |
1960 | if (self->tx_buff.len > 0) | |
1961 | self->ier = IER_TXLDL_IE; | |
1962 | else { | |
1963 | ||
1964 | self->netdev->stats.tx_packets++; | |
1965 | netif_wake_queue(self->netdev); | |
1966 | self->ier = IER_TXEMP_IE; | |
1967 | } | |
1968 | ||
1969 | } | |
1970 | /* Check if transmission has completed */ | |
1971 | if (eir & EIR_TXEMP_EV) { | |
1972 | /* Turn around and get ready to receive some data */ | |
1973 | self->io.direction = IO_RECV; | |
1974 | self->ier = IER_RXHDL_IE; | |
1975 | /* Check if we need to change the speed? | |
1976 | * Need to be after self->io.direction to avoid race with | |
1977 | * nsc_ircc_hard_xmit_sir() - Jean II */ | |
1978 | if (self->new_speed) { | |
1979 | IRDA_DEBUG(2, "%s(), Changing speed!\n", __func__); | |
1980 | self->ier = nsc_ircc_change_speed(self, | |
1981 | self->new_speed); | |
1982 | self->new_speed = 0; | |
1983 | netif_wake_queue(self->netdev); | |
1984 | ||
1985 | /* Check if we are going to FIR */ | |
1986 | if (self->io.speed > 115200) { | |
1987 | /* No need to do anymore SIR stuff */ | |
1988 | return; | |
1989 | } | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | /* Rx FIFO threshold or timeout */ | |
1994 | if (eir & EIR_RXHDL_EV) { | |
1995 | nsc_ircc_pio_receive(self); | |
1996 | ||
1997 | /* Keep receiving */ | |
1998 | self->ier = IER_RXHDL_IE; | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Function nsc_ircc_fir_interrupt (self, eir) | |
2004 | * | |
2005 | * Handle MIR/FIR interrupt | |
2006 | * | |
2007 | */ | |
2008 | static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase, | |
2009 | int eir) | |
2010 | { | |
2011 | __u8 bank; | |
2012 | ||
2013 | bank = inb(iobase+BSR); | |
2014 | ||
2015 | /* Status FIFO event*/ | |
2016 | if (eir & EIR_SFIF_EV) { | |
2017 | /* Check if DMA has finished */ | |
2018 | if (nsc_ircc_dma_receive_complete(self, iobase)) { | |
2019 | /* Wait for next status FIFO interrupt */ | |
2020 | self->ier = IER_SFIF_IE; | |
2021 | } else { | |
2022 | self->ier = IER_SFIF_IE | IER_TMR_IE; | |
2023 | } | |
2024 | } else if (eir & EIR_TMR_EV) { /* Timer finished */ | |
2025 | /* Disable timer */ | |
2026 | switch_bank(iobase, BANK4); | |
2027 | outb(0, iobase+IRCR1); | |
2028 | ||
2029 | /* Clear timer event */ | |
2030 | switch_bank(iobase, BANK0); | |
2031 | outb(ASCR_CTE, iobase+ASCR); | |
2032 | ||
2033 | /* Check if this is a Tx timer interrupt */ | |
2034 | if (self->io.direction == IO_XMIT) { | |
2035 | nsc_ircc_dma_xmit(self, iobase); | |
2036 | ||
2037 | /* Interrupt on DMA */ | |
2038 | self->ier = IER_DMA_IE; | |
2039 | } else { | |
2040 | /* Check (again) if DMA has finished */ | |
2041 | if (nsc_ircc_dma_receive_complete(self, iobase)) { | |
2042 | self->ier = IER_SFIF_IE; | |
2043 | } else { | |
2044 | self->ier = IER_SFIF_IE | IER_TMR_IE; | |
2045 | } | |
2046 | } | |
2047 | } else if (eir & EIR_DMA_EV) { | |
2048 | /* Finished with all transmissions? */ | |
2049 | if (nsc_ircc_dma_xmit_complete(self)) { | |
2050 | if(self->new_speed != 0) { | |
2051 | /* As we stop the Tx queue, the speed change | |
2052 | * need to be done when the Tx fifo is | |
2053 | * empty. Ask for a Tx done interrupt */ | |
2054 | self->ier = IER_TXEMP_IE; | |
2055 | } else { | |
2056 | /* Check if there are more frames to be | |
2057 | * transmitted */ | |
2058 | if (irda_device_txqueue_empty(self->netdev)) { | |
2059 | /* Prepare for receive */ | |
2060 | nsc_ircc_dma_receive(self); | |
2061 | self->ier = IER_SFIF_IE; | |
2062 | } else | |
2063 | IRDA_WARNING("%s(), potential " | |
2064 | "Tx queue lockup !\n", | |
2065 | __func__); | |
2066 | } | |
2067 | } else { | |
2068 | /* Not finished yet, so interrupt on DMA again */ | |
2069 | self->ier = IER_DMA_IE; | |
2070 | } | |
2071 | } else if (eir & EIR_TXEMP_EV) { | |
2072 | /* The Tx FIFO has totally drained out, so now we can change | |
2073 | * the speed... - Jean II */ | |
2074 | self->ier = nsc_ircc_change_speed(self, self->new_speed); | |
2075 | self->new_speed = 0; | |
2076 | netif_wake_queue(self->netdev); | |
2077 | /* Note : nsc_ircc_change_speed() restarted Rx fifo */ | |
2078 | } | |
2079 | ||
2080 | outb(bank, iobase+BSR); | |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * Function nsc_ircc_interrupt (irq, dev_id, regs) | |
2085 | * | |
2086 | * An interrupt from the chip has arrived. Time to do some work | |
2087 | * | |
2088 | */ | |
2089 | static irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id) | |
2090 | { | |
2091 | struct net_device *dev = dev_id; | |
2092 | struct nsc_ircc_cb *self; | |
2093 | __u8 bsr, eir; | |
2094 | int iobase; | |
2095 | ||
2096 | self = netdev_priv(dev); | |
2097 | ||
2098 | spin_lock(&self->lock); | |
2099 | ||
2100 | iobase = self->io.fir_base; | |
2101 | ||
2102 | bsr = inb(iobase+BSR); /* Save current bank */ | |
2103 | ||
2104 | switch_bank(iobase, BANK0); | |
2105 | self->ier = inb(iobase+IER); | |
2106 | eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */ | |
2107 | ||
2108 | outb(0, iobase+IER); /* Disable interrupts */ | |
2109 | ||
2110 | if (eir) { | |
2111 | /* Dispatch interrupt handler for the current speed */ | |
2112 | if (self->io.speed > 115200) | |
2113 | nsc_ircc_fir_interrupt(self, iobase, eir); | |
2114 | else | |
2115 | nsc_ircc_sir_interrupt(self, eir); | |
2116 | } | |
2117 | ||
2118 | outb(self->ier, iobase+IER); /* Restore interrupts */ | |
2119 | outb(bsr, iobase+BSR); /* Restore bank register */ | |
2120 | ||
2121 | spin_unlock(&self->lock); | |
2122 | return IRQ_RETVAL(eir); | |
2123 | } | |
2124 | ||
2125 | /* | |
2126 | * Function nsc_ircc_is_receiving (self) | |
2127 | * | |
2128 | * Return TRUE is we are currently receiving a frame | |
2129 | * | |
2130 | */ | |
2131 | static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self) | |
2132 | { | |
2133 | unsigned long flags; | |
2134 | int status = FALSE; | |
2135 | int iobase; | |
2136 | __u8 bank; | |
2137 | ||
2138 | IRDA_ASSERT(self != NULL, return FALSE;); | |
2139 | ||
2140 | spin_lock_irqsave(&self->lock, flags); | |
2141 | ||
2142 | if (self->io.speed > 115200) { | |
2143 | iobase = self->io.fir_base; | |
2144 | ||
2145 | /* Check if rx FIFO is not empty */ | |
2146 | bank = inb(iobase+BSR); | |
2147 | switch_bank(iobase, BANK2); | |
2148 | if ((inb(iobase+RXFLV) & 0x3f) != 0) { | |
2149 | /* We are receiving something */ | |
2150 | status = TRUE; | |
2151 | } | |
2152 | outb(bank, iobase+BSR); | |
2153 | } else | |
2154 | status = (self->rx_buff.state != OUTSIDE_FRAME); | |
2155 | ||
2156 | spin_unlock_irqrestore(&self->lock, flags); | |
2157 | ||
2158 | return status; | |
2159 | } | |
2160 | ||
2161 | /* | |
2162 | * Function nsc_ircc_net_open (dev) | |
2163 | * | |
2164 | * Start the device | |
2165 | * | |
2166 | */ | |
2167 | static int nsc_ircc_net_open(struct net_device *dev) | |
2168 | { | |
2169 | struct nsc_ircc_cb *self; | |
2170 | int iobase; | |
2171 | char hwname[32]; | |
2172 | __u8 bank; | |
2173 | ||
2174 | IRDA_DEBUG(4, "%s()\n", __func__); | |
2175 | ||
2176 | IRDA_ASSERT(dev != NULL, return -1;); | |
2177 | self = netdev_priv(dev); | |
2178 | ||
2179 | IRDA_ASSERT(self != NULL, return 0;); | |
2180 | ||
2181 | iobase = self->io.fir_base; | |
2182 | ||
2183 | if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) { | |
2184 | IRDA_WARNING("%s, unable to allocate irq=%d\n", | |
2185 | driver_name, self->io.irq); | |
2186 | return -EAGAIN; | |
2187 | } | |
2188 | /* | |
2189 | * Always allocate the DMA channel after the IRQ, and clean up on | |
2190 | * failure. | |
2191 | */ | |
2192 | if (request_dma(self->io.dma, dev->name)) { | |
2193 | IRDA_WARNING("%s, unable to allocate dma=%d\n", | |
2194 | driver_name, self->io.dma); | |
2195 | free_irq(self->io.irq, dev); | |
2196 | return -EAGAIN; | |
2197 | } | |
2198 | ||
2199 | /* Save current bank */ | |
2200 | bank = inb(iobase+BSR); | |
2201 | ||
2202 | /* turn on interrupts */ | |
2203 | switch_bank(iobase, BANK0); | |
2204 | outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER); | |
2205 | ||
2206 | /* Restore bank register */ | |
2207 | outb(bank, iobase+BSR); | |
2208 | ||
2209 | /* Ready to play! */ | |
2210 | netif_start_queue(dev); | |
2211 | ||
2212 | /* Give self a hardware name */ | |
2213 | sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base); | |
2214 | ||
2215 | /* | |
2216 | * Open new IrLAP layer instance, now that everything should be | |
2217 | * initialized properly | |
2218 | */ | |
2219 | self->irlap = irlap_open(dev, &self->qos, hwname); | |
2220 | ||
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | /* | |
2225 | * Function nsc_ircc_net_close (dev) | |
2226 | * | |
2227 | * Stop the device | |
2228 | * | |
2229 | */ | |
2230 | static int nsc_ircc_net_close(struct net_device *dev) | |
2231 | { | |
2232 | struct nsc_ircc_cb *self; | |
2233 | int iobase; | |
2234 | __u8 bank; | |
2235 | ||
2236 | IRDA_DEBUG(4, "%s()\n", __func__); | |
2237 | ||
2238 | IRDA_ASSERT(dev != NULL, return -1;); | |
2239 | ||
2240 | self = netdev_priv(dev); | |
2241 | IRDA_ASSERT(self != NULL, return 0;); | |
2242 | ||
2243 | /* Stop device */ | |
2244 | netif_stop_queue(dev); | |
2245 | ||
2246 | /* Stop and remove instance of IrLAP */ | |
2247 | if (self->irlap) | |
2248 | irlap_close(self->irlap); | |
2249 | self->irlap = NULL; | |
2250 | ||
2251 | iobase = self->io.fir_base; | |
2252 | ||
2253 | disable_dma(self->io.dma); | |
2254 | ||
2255 | /* Save current bank */ | |
2256 | bank = inb(iobase+BSR); | |
2257 | ||
2258 | /* Disable interrupts */ | |
2259 | switch_bank(iobase, BANK0); | |
2260 | outb(0, iobase+IER); | |
2261 | ||
2262 | free_irq(self->io.irq, dev); | |
2263 | free_dma(self->io.dma); | |
2264 | ||
2265 | /* Restore bank register */ | |
2266 | outb(bank, iobase+BSR); | |
2267 | ||
2268 | return 0; | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * Function nsc_ircc_net_ioctl (dev, rq, cmd) | |
2273 | * | |
2274 | * Process IOCTL commands for this device | |
2275 | * | |
2276 | */ | |
2277 | static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
2278 | { | |
2279 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
2280 | struct nsc_ircc_cb *self; | |
2281 | unsigned long flags; | |
2282 | int ret = 0; | |
2283 | ||
2284 | IRDA_ASSERT(dev != NULL, return -1;); | |
2285 | ||
2286 | self = netdev_priv(dev); | |
2287 | ||
2288 | IRDA_ASSERT(self != NULL, return -1;); | |
2289 | ||
2290 | IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd); | |
2291 | ||
2292 | switch (cmd) { | |
2293 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
2294 | if (!capable(CAP_NET_ADMIN)) { | |
2295 | ret = -EPERM; | |
2296 | break; | |
2297 | } | |
2298 | spin_lock_irqsave(&self->lock, flags); | |
2299 | nsc_ircc_change_speed(self, irq->ifr_baudrate); | |
2300 | spin_unlock_irqrestore(&self->lock, flags); | |
2301 | break; | |
2302 | case SIOCSMEDIABUSY: /* Set media busy */ | |
2303 | if (!capable(CAP_NET_ADMIN)) { | |
2304 | ret = -EPERM; | |
2305 | break; | |
2306 | } | |
2307 | irda_device_set_media_busy(self->netdev, TRUE); | |
2308 | break; | |
2309 | case SIOCGRECEIVING: /* Check if we are receiving right now */ | |
2310 | /* This is already protected */ | |
2311 | irq->ifr_receiving = nsc_ircc_is_receiving(self); | |
2312 | break; | |
2313 | default: | |
2314 | ret = -EOPNOTSUPP; | |
2315 | } | |
2316 | return ret; | |
2317 | } | |
2318 | ||
2319 | static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state) | |
2320 | { | |
2321 | struct nsc_ircc_cb *self = platform_get_drvdata(dev); | |
2322 | int bank; | |
2323 | unsigned long flags; | |
2324 | int iobase = self->io.fir_base; | |
2325 | ||
2326 | if (self->io.suspended) | |
2327 | return 0; | |
2328 | ||
2329 | IRDA_DEBUG(1, "%s, Suspending\n", driver_name); | |
2330 | ||
2331 | rtnl_lock(); | |
2332 | if (netif_running(self->netdev)) { | |
2333 | netif_device_detach(self->netdev); | |
2334 | spin_lock_irqsave(&self->lock, flags); | |
2335 | /* Save current bank */ | |
2336 | bank = inb(iobase+BSR); | |
2337 | ||
2338 | /* Disable interrupts */ | |
2339 | switch_bank(iobase, BANK0); | |
2340 | outb(0, iobase+IER); | |
2341 | ||
2342 | /* Restore bank register */ | |
2343 | outb(bank, iobase+BSR); | |
2344 | ||
2345 | spin_unlock_irqrestore(&self->lock, flags); | |
2346 | free_irq(self->io.irq, self->netdev); | |
2347 | disable_dma(self->io.dma); | |
2348 | } | |
2349 | self->io.suspended = 1; | |
2350 | rtnl_unlock(); | |
2351 | ||
2352 | return 0; | |
2353 | } | |
2354 | ||
2355 | static int nsc_ircc_resume(struct platform_device *dev) | |
2356 | { | |
2357 | struct nsc_ircc_cb *self = platform_get_drvdata(dev); | |
2358 | unsigned long flags; | |
2359 | ||
2360 | if (!self->io.suspended) | |
2361 | return 0; | |
2362 | ||
2363 | IRDA_DEBUG(1, "%s, Waking up\n", driver_name); | |
2364 | ||
2365 | rtnl_lock(); | |
2366 | nsc_ircc_setup(&self->io); | |
2367 | nsc_ircc_init_dongle_interface(self->io.fir_base, self->io.dongle_id); | |
2368 | ||
2369 | if (netif_running(self->netdev)) { | |
2370 | if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, | |
2371 | self->netdev->name, self->netdev)) { | |
2372 | IRDA_WARNING("%s, unable to allocate irq=%d\n", | |
2373 | driver_name, self->io.irq); | |
2374 | ||
2375 | /* | |
2376 | * Don't fail resume process, just kill this | |
2377 | * network interface | |
2378 | */ | |
2379 | unregister_netdevice(self->netdev); | |
2380 | } else { | |
2381 | spin_lock_irqsave(&self->lock, flags); | |
2382 | nsc_ircc_change_speed(self, self->io.speed); | |
2383 | spin_unlock_irqrestore(&self->lock, flags); | |
2384 | netif_device_attach(self->netdev); | |
2385 | } | |
2386 | ||
2387 | } else { | |
2388 | spin_lock_irqsave(&self->lock, flags); | |
2389 | nsc_ircc_change_speed(self, 9600); | |
2390 | spin_unlock_irqrestore(&self->lock, flags); | |
2391 | } | |
2392 | self->io.suspended = 0; | |
2393 | rtnl_unlock(); | |
2394 | ||
2395 | return 0; | |
2396 | } | |
2397 | ||
2398 | MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); | |
2399 | MODULE_DESCRIPTION("NSC IrDA Device Driver"); | |
2400 | MODULE_LICENSE("GPL"); | |
2401 | ||
2402 | ||
2403 | module_param(qos_mtt_bits, int, 0); | |
2404 | MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); | |
2405 | module_param_array(io, int, NULL, 0); | |
2406 | MODULE_PARM_DESC(io, "Base I/O addresses"); | |
2407 | module_param_array(irq, int, NULL, 0); | |
2408 | MODULE_PARM_DESC(irq, "IRQ lines"); | |
2409 | module_param_array(dma, int, NULL, 0); | |
2410 | MODULE_PARM_DESC(dma, "DMA channels"); | |
2411 | module_param(dongle_id, int, 0); | |
2412 | MODULE_PARM_DESC(dongle_id, "Type-id of used dongle"); | |
2413 | ||
2414 | module_init(nsc_ircc_init); | |
2415 | module_exit(nsc_ircc_cleanup); | |
2416 |