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1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: w83977af_ir.c | |
4 | * Version: 1.0 | |
5 | * Description: FIR driver for the Winbond W83977AF Super I/O chip | |
6 | * Status: Experimental. | |
7 | * Author: Paul VanderSpek | |
8 | * Created at: Wed Nov 4 11:46:16 1998 | |
9 | * Modified at: Fri Jan 28 12:10:59 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) 1998-1999 Rebel.com | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
18 | * the License, or (at your option) any later version. | |
19 | * | |
20 | * Neither Paul VanderSpek nor Rebel.com admit liability nor provide | |
21 | * warranty for any of this software. This material is provided "AS-IS" | |
22 | * and at no charge. | |
23 | * | |
24 | * If you find bugs in this file, its very likely that the same bug | |
25 | * will also be in pc87108.c since the implementations are quite | |
26 | * similar. | |
27 | * | |
28 | * Notice that all functions that needs to access the chip in _any_ | |
29 | * way, must save BSR register on entry, and restore it on exit. | |
30 | * It is _very_ important to follow this policy! | |
31 | * | |
32 | * __u8 bank; | |
33 | * | |
34 | * bank = inb( iobase+BSR); | |
35 | * | |
36 | * do_your_stuff_here(); | |
37 | * | |
38 | * outb( bank, iobase+BSR); | |
39 | * | |
40 | ********************************************************************/ | |
41 | ||
42 | #include <linux/module.h> | |
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/types.h> | |
45 | #include <linux/skbuff.h> | |
46 | #include <linux/netdevice.h> | |
47 | #include <linux/ioport.h> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/rtnetlink.h> | |
52 | #include <linux/dma-mapping.h> | |
53 | ||
54 | #include <asm/io.h> | |
55 | #include <asm/dma.h> | |
56 | #include <asm/byteorder.h> | |
57 | ||
58 | #include <net/irda/irda.h> | |
59 | #include <net/irda/wrapper.h> | |
60 | #include <net/irda/irda_device.h> | |
61 | #include "w83977af.h" | |
62 | #include "w83977af_ir.h" | |
63 | ||
64 | #ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */ | |
65 | #undef CONFIG_NETWINDER_TX_DMA_PROBLEMS /* Not needed */ | |
66 | #define CONFIG_NETWINDER_RX_DMA_PROBLEMS /* Must have this one! */ | |
67 | #endif | |
68 | #undef CONFIG_USE_INTERNAL_TIMER /* Just cannot make that timer work */ | |
69 | #define CONFIG_USE_W977_PNP /* Currently needed */ | |
70 | #define PIO_MAX_SPEED 115200 | |
71 | ||
72 | static char *driver_name = "w83977af_ir"; | |
73 | static int qos_mtt_bits = 0x07; /* 1 ms or more */ | |
74 | ||
75 | #define CHIP_IO_EXTENT 8 | |
76 | ||
77 | static unsigned int io[] = { 0x180, ~0, ~0, ~0 }; | |
78 | #ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */ | |
79 | static unsigned int irq[] = { 6, 0, 0, 0 }; | |
80 | #else | |
81 | static unsigned int irq[] = { 11, 0, 0, 0 }; | |
82 | #endif | |
83 | static unsigned int dma[] = { 1, 0, 0, 0 }; | |
84 | static unsigned int efbase[] = { W977_EFIO_BASE, W977_EFIO2_BASE }; | |
85 | static unsigned int efio = W977_EFIO_BASE; | |
86 | ||
87 | static struct w83977af_ir *dev_self[] = { NULL, NULL, NULL, NULL}; | |
88 | ||
89 | /* Some prototypes */ | |
90 | static int w83977af_open(int i, unsigned int iobase, unsigned int irq, | |
91 | unsigned int dma); | |
92 | static int w83977af_close(struct w83977af_ir *self); | |
93 | static int w83977af_probe(int iobase, int irq, int dma); | |
94 | static int w83977af_dma_receive(struct w83977af_ir *self); | |
95 | static int w83977af_dma_receive_complete(struct w83977af_ir *self); | |
96 | static int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev); | |
97 | static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size); | |
98 | static void w83977af_dma_write(struct w83977af_ir *self, int iobase); | |
99 | static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed); | |
100 | static int w83977af_is_receiving(struct w83977af_ir *self); | |
101 | ||
102 | static int w83977af_net_open(struct net_device *dev); | |
103 | static int w83977af_net_close(struct net_device *dev); | |
104 | static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
105 | static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev); | |
106 | ||
107 | /* | |
108 | * Function w83977af_init () | |
109 | * | |
110 | * Initialize chip. Just try to find out how many chips we are dealing with | |
111 | * and where they are | |
112 | */ | |
113 | static int __init w83977af_init(void) | |
114 | { | |
115 | int i; | |
116 | ||
117 | IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); | |
118 | ||
9c3bd683 | 119 | for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) { |
1da177e4 LT |
120 | if (w83977af_open(i, io[i], irq[i], dma[i]) == 0) |
121 | return 0; | |
122 | } | |
123 | return -ENODEV; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Function w83977af_cleanup () | |
128 | * | |
129 | * Close all configured chips | |
130 | * | |
131 | */ | |
132 | static void __exit w83977af_cleanup(void) | |
133 | { | |
134 | int i; | |
135 | ||
136 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
137 | ||
9c3bd683 | 138 | for (i=0; i < ARRAY_SIZE(dev_self); i++) { |
1da177e4 LT |
139 | if (dev_self[i]) |
140 | w83977af_close(dev_self[i]); | |
141 | } | |
142 | } | |
143 | ||
144 | /* | |
145 | * Function w83977af_open (iobase, irq) | |
146 | * | |
147 | * Open driver instance | |
148 | * | |
149 | */ | |
150 | int w83977af_open(int i, unsigned int iobase, unsigned int irq, | |
151 | unsigned int dma) | |
152 | { | |
153 | struct net_device *dev; | |
154 | struct w83977af_ir *self; | |
155 | int err; | |
156 | ||
157 | IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); | |
158 | ||
159 | /* Lock the port that we need */ | |
160 | if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) { | |
161 | IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n", | |
162 | __FUNCTION__ , iobase); | |
163 | return -ENODEV; | |
164 | } | |
165 | ||
166 | if (w83977af_probe(iobase, irq, dma) == -1) { | |
167 | err = -1; | |
168 | goto err_out; | |
169 | } | |
170 | /* | |
171 | * Allocate new instance of the driver | |
172 | */ | |
173 | dev = alloc_irdadev(sizeof(struct w83977af_ir)); | |
174 | if (dev == NULL) { | |
175 | printk( KERN_ERR "IrDA: Can't allocate memory for " | |
176 | "IrDA control block!\n"); | |
177 | err = -ENOMEM; | |
178 | goto err_out; | |
179 | } | |
180 | ||
181 | self = dev->priv; | |
182 | spin_lock_init(&self->lock); | |
183 | ||
184 | ||
185 | /* Initialize IO */ | |
186 | self->io.fir_base = iobase; | |
187 | self->io.irq = irq; | |
188 | self->io.fir_ext = CHIP_IO_EXTENT; | |
189 | self->io.dma = dma; | |
190 | self->io.fifo_size = 32; | |
191 | ||
192 | /* Initialize QoS for this device */ | |
193 | irda_init_max_qos_capabilies(&self->qos); | |
194 | ||
195 | /* The only value we must override it the baudrate */ | |
196 | ||
197 | /* FIXME: The HP HDLS-1100 does not support 1152000! */ | |
198 | self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| | |
199 | IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); | |
200 | ||
201 | /* The HP HDLS-1100 needs 1 ms according to the specs */ | |
202 | self->qos.min_turn_time.bits = qos_mtt_bits; | |
203 | irda_qos_bits_to_value(&self->qos); | |
204 | ||
205 | /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ | |
206 | self->rx_buff.truesize = 14384; | |
207 | self->tx_buff.truesize = 4000; | |
208 | ||
209 | /* Allocate memory if needed */ | |
210 | self->rx_buff.head = | |
211 | dma_alloc_coherent(NULL, self->rx_buff.truesize, | |
212 | &self->rx_buff_dma, GFP_KERNEL); | |
213 | if (self->rx_buff.head == NULL) { | |
214 | err = -ENOMEM; | |
215 | goto err_out1; | |
216 | } | |
217 | ||
218 | memset(self->rx_buff.head, 0, self->rx_buff.truesize); | |
219 | ||
220 | self->tx_buff.head = | |
221 | dma_alloc_coherent(NULL, self->tx_buff.truesize, | |
222 | &self->tx_buff_dma, GFP_KERNEL); | |
223 | if (self->tx_buff.head == NULL) { | |
224 | err = -ENOMEM; | |
225 | goto err_out2; | |
226 | } | |
227 | memset(self->tx_buff.head, 0, self->tx_buff.truesize); | |
228 | ||
229 | self->rx_buff.in_frame = FALSE; | |
230 | self->rx_buff.state = OUTSIDE_FRAME; | |
231 | self->tx_buff.data = self->tx_buff.head; | |
232 | self->rx_buff.data = self->rx_buff.head; | |
233 | self->netdev = dev; | |
234 | ||
235 | /* Keep track of module usage */ | |
236 | SET_MODULE_OWNER(dev); | |
237 | ||
238 | /* Override the network functions we need to use */ | |
239 | dev->hard_start_xmit = w83977af_hard_xmit; | |
240 | dev->open = w83977af_net_open; | |
241 | dev->stop = w83977af_net_close; | |
242 | dev->do_ioctl = w83977af_net_ioctl; | |
243 | dev->get_stats = w83977af_net_get_stats; | |
244 | ||
245 | err = register_netdev(dev); | |
246 | if (err) { | |
247 | IRDA_ERROR("%s(), register_netdevice() failed!\n", __FUNCTION__); | |
248 | goto err_out3; | |
249 | } | |
250 | IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name); | |
251 | ||
252 | /* Need to store self somewhere */ | |
253 | dev_self[i] = self; | |
254 | ||
255 | return 0; | |
256 | err_out3: | |
257 | dma_free_coherent(NULL, self->tx_buff.truesize, | |
258 | self->tx_buff.head, self->tx_buff_dma); | |
259 | err_out2: | |
260 | dma_free_coherent(NULL, self->rx_buff.truesize, | |
261 | self->rx_buff.head, self->rx_buff_dma); | |
262 | err_out1: | |
263 | free_netdev(dev); | |
264 | err_out: | |
265 | release_region(iobase, CHIP_IO_EXTENT); | |
266 | return err; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Function w83977af_close (self) | |
271 | * | |
272 | * Close driver instance | |
273 | * | |
274 | */ | |
275 | static int w83977af_close(struct w83977af_ir *self) | |
276 | { | |
277 | int iobase; | |
278 | ||
279 | IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); | |
280 | ||
281 | iobase = self->io.fir_base; | |
282 | ||
283 | #ifdef CONFIG_USE_W977_PNP | |
284 | /* enter PnP configuration mode */ | |
285 | w977_efm_enter(efio); | |
286 | ||
287 | w977_select_device(W977_DEVICE_IR, efio); | |
288 | ||
289 | /* Deactivate device */ | |
290 | w977_write_reg(0x30, 0x00, efio); | |
291 | ||
292 | w977_efm_exit(efio); | |
293 | #endif /* CONFIG_USE_W977_PNP */ | |
294 | ||
295 | /* Remove netdevice */ | |
296 | unregister_netdev(self->netdev); | |
297 | ||
298 | /* Release the PORT that this driver is using */ | |
299 | IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n", | |
300 | __FUNCTION__ , self->io.fir_base); | |
301 | release_region(self->io.fir_base, self->io.fir_ext); | |
302 | ||
303 | if (self->tx_buff.head) | |
304 | dma_free_coherent(NULL, self->tx_buff.truesize, | |
305 | self->tx_buff.head, self->tx_buff_dma); | |
306 | ||
307 | if (self->rx_buff.head) | |
308 | dma_free_coherent(NULL, self->rx_buff.truesize, | |
309 | self->rx_buff.head, self->rx_buff_dma); | |
310 | ||
311 | free_netdev(self->netdev); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | int w83977af_probe( int iobase, int irq, int dma) | |
317 | { | |
318 | int version; | |
319 | int i; | |
320 | ||
321 | for (i=0; i < 2; i++) { | |
322 | IRDA_DEBUG( 0, "%s()\n", __FUNCTION__ ); | |
323 | #ifdef CONFIG_USE_W977_PNP | |
324 | /* Enter PnP configuration mode */ | |
325 | w977_efm_enter(efbase[i]); | |
326 | ||
327 | w977_select_device(W977_DEVICE_IR, efbase[i]); | |
328 | ||
329 | /* Configure PnP port, IRQ, and DMA channel */ | |
330 | w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]); | |
331 | w977_write_reg(0x61, (iobase) & 0xff, efbase[i]); | |
332 | ||
333 | w977_write_reg(0x70, irq, efbase[i]); | |
334 | #ifdef CONFIG_ARCH_NETWINDER | |
335 | /* Netwinder uses 1 higher than Linux */ | |
336 | w977_write_reg(0x74, dma+1, efbase[i]); | |
337 | #else | |
338 | w977_write_reg(0x74, dma, efbase[i]); | |
339 | #endif /*CONFIG_ARCH_NETWINDER */ | |
340 | w977_write_reg(0x75, 0x04, efbase[i]); /* Disable Tx DMA */ | |
341 | ||
342 | /* Set append hardware CRC, enable IR bank selection */ | |
343 | w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]); | |
344 | ||
345 | /* Activate device */ | |
346 | w977_write_reg(0x30, 0x01, efbase[i]); | |
347 | ||
348 | w977_efm_exit(efbase[i]); | |
349 | #endif /* CONFIG_USE_W977_PNP */ | |
350 | /* Disable Advanced mode */ | |
351 | switch_bank(iobase, SET2); | |
352 | outb(iobase+2, 0x00); | |
353 | ||
354 | /* Turn on UART (global) interrupts */ | |
355 | switch_bank(iobase, SET0); | |
356 | outb(HCR_EN_IRQ, iobase+HCR); | |
357 | ||
358 | /* Switch to advanced mode */ | |
359 | switch_bank(iobase, SET2); | |
360 | outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1); | |
361 | ||
362 | /* Set default IR-mode */ | |
363 | switch_bank(iobase, SET0); | |
364 | outb(HCR_SIR, iobase+HCR); | |
365 | ||
366 | /* Read the Advanced IR ID */ | |
367 | switch_bank(iobase, SET3); | |
368 | version = inb(iobase+AUID); | |
369 | ||
370 | /* Should be 0x1? */ | |
371 | if (0x10 == (version & 0xf0)) { | |
372 | efio = efbase[i]; | |
373 | ||
374 | /* Set FIFO size to 32 */ | |
375 | switch_bank(iobase, SET2); | |
376 | outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2); | |
377 | ||
378 | /* Set FIFO threshold to TX17, RX16 */ | |
379 | switch_bank(iobase, SET0); | |
380 | outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST| | |
381 | UFR_EN_FIFO,iobase+UFR); | |
382 | ||
383 | /* Receiver frame length */ | |
384 | switch_bank(iobase, SET4); | |
385 | outb(2048 & 0xff, iobase+6); | |
386 | outb((2048 >> 8) & 0x1f, iobase+7); | |
387 | ||
388 | /* | |
389 | * Init HP HSDL-1100 transceiver. | |
390 | * | |
391 | * Set IRX_MSL since we have 2 * receive paths IRRX, | |
392 | * and IRRXH. Clear IRSL0D since we want IRSL0 * to | |
393 | * be a input pin used for IRRXH | |
394 | * | |
395 | * IRRX pin 37 connected to receiver | |
396 | * IRTX pin 38 connected to transmitter | |
397 | * FIRRX pin 39 connected to receiver (IRSL0) | |
398 | * CIRRX pin 40 connected to pin 37 | |
399 | */ | |
400 | switch_bank(iobase, SET7); | |
401 | outb(0x40, iobase+7); | |
402 | ||
403 | IRDA_MESSAGE("W83977AF (IR) driver loaded. " | |
404 | "Version: 0x%02x\n", version); | |
405 | ||
406 | return 0; | |
407 | } else { | |
408 | /* Try next extented function register address */ | |
409 | IRDA_DEBUG( 0, "%s(), Wrong chip version", __FUNCTION__ ); | |
410 | } | |
411 | } | |
412 | return -1; | |
413 | } | |
414 | ||
415 | void w83977af_change_speed(struct w83977af_ir *self, __u32 speed) | |
416 | { | |
417 | int ir_mode = HCR_SIR; | |
418 | int iobase; | |
419 | __u8 set; | |
420 | ||
421 | iobase = self->io.fir_base; | |
422 | ||
423 | /* Update accounting for new speed */ | |
424 | self->io.speed = speed; | |
425 | ||
426 | /* Save current bank */ | |
427 | set = inb(iobase+SSR); | |
428 | ||
429 | /* Disable interrupts */ | |
430 | switch_bank(iobase, SET0); | |
431 | outb(0, iobase+ICR); | |
432 | ||
433 | /* Select Set 2 */ | |
434 | switch_bank(iobase, SET2); | |
435 | outb(0x00, iobase+ABHL); | |
436 | ||
437 | switch (speed) { | |
438 | case 9600: outb(0x0c, iobase+ABLL); break; | |
439 | case 19200: outb(0x06, iobase+ABLL); break; | |
440 | case 38400: outb(0x03, iobase+ABLL); break; | |
441 | case 57600: outb(0x02, iobase+ABLL); break; | |
442 | case 115200: outb(0x01, iobase+ABLL); break; | |
443 | case 576000: | |
444 | ir_mode = HCR_MIR_576; | |
445 | IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__ ); | |
446 | break; | |
447 | case 1152000: | |
448 | ir_mode = HCR_MIR_1152; | |
449 | IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __FUNCTION__ ); | |
450 | break; | |
451 | case 4000000: | |
452 | ir_mode = HCR_FIR; | |
453 | IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __FUNCTION__ ); | |
454 | break; | |
455 | default: | |
456 | ir_mode = HCR_FIR; | |
457 | IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __FUNCTION__ , speed); | |
458 | break; | |
459 | } | |
460 | ||
461 | /* Set speed mode */ | |
462 | switch_bank(iobase, SET0); | |
463 | outb(ir_mode, iobase+HCR); | |
464 | ||
465 | /* set FIFO size to 32 */ | |
466 | switch_bank(iobase, SET2); | |
467 | outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2); | |
468 | ||
469 | /* set FIFO threshold to TX17, RX16 */ | |
470 | switch_bank(iobase, SET0); | |
471 | outb(0x00, iobase+UFR); /* Reset */ | |
472 | outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */ | |
473 | outb(0xa7, iobase+UFR); | |
474 | ||
475 | netif_wake_queue(self->netdev); | |
476 | ||
477 | /* Enable some interrupts so we can receive frames */ | |
478 | switch_bank(iobase, SET0); | |
479 | if (speed > PIO_MAX_SPEED) { | |
480 | outb(ICR_EFSFI, iobase+ICR); | |
481 | w83977af_dma_receive(self); | |
482 | } else | |
483 | outb(ICR_ERBRI, iobase+ICR); | |
484 | ||
485 | /* Restore SSR */ | |
486 | outb(set, iobase+SSR); | |
487 | } | |
488 | ||
489 | /* | |
490 | * Function w83977af_hard_xmit (skb, dev) | |
491 | * | |
492 | * Sets up a DMA transfer to send the current frame. | |
493 | * | |
494 | */ | |
495 | int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev) | |
496 | { | |
497 | struct w83977af_ir *self; | |
498 | __s32 speed; | |
499 | int iobase; | |
500 | __u8 set; | |
501 | int mtt; | |
502 | ||
503 | self = (struct w83977af_ir *) dev->priv; | |
504 | ||
505 | iobase = self->io.fir_base; | |
506 | ||
507 | IRDA_DEBUG(4, "%s(%ld), skb->len=%d\n", __FUNCTION__ , jiffies, | |
508 | (int) skb->len); | |
509 | ||
510 | /* Lock transmit buffer */ | |
511 | netif_stop_queue(dev); | |
512 | ||
513 | /* Check if we need to change the speed */ | |
514 | speed = irda_get_next_speed(skb); | |
515 | if ((speed != self->io.speed) && (speed != -1)) { | |
516 | /* Check for empty frame */ | |
517 | if (!skb->len) { | |
518 | w83977af_change_speed(self, speed); | |
519 | dev->trans_start = jiffies; | |
520 | dev_kfree_skb(skb); | |
521 | return 0; | |
522 | } else | |
523 | self->new_speed = speed; | |
524 | } | |
525 | ||
526 | /* Save current set */ | |
527 | set = inb(iobase+SSR); | |
528 | ||
529 | /* Decide if we should use PIO or DMA transfer */ | |
530 | if (self->io.speed > PIO_MAX_SPEED) { | |
531 | self->tx_buff.data = self->tx_buff.head; | |
d626f62b | 532 | skb_copy_from_linear_data(skb, self->tx_buff.data, skb->len); |
1da177e4 LT |
533 | self->tx_buff.len = skb->len; |
534 | ||
535 | mtt = irda_get_mtt(skb); | |
536 | #ifdef CONFIG_USE_INTERNAL_TIMER | |
537 | if (mtt > 50) { | |
538 | /* Adjust for timer resolution */ | |
539 | mtt /= 1000+1; | |
540 | ||
541 | /* Setup timer */ | |
542 | switch_bank(iobase, SET4); | |
543 | outb(mtt & 0xff, iobase+TMRL); | |
544 | outb((mtt >> 8) & 0x0f, iobase+TMRH); | |
545 | ||
546 | /* Start timer */ | |
547 | outb(IR_MSL_EN_TMR, iobase+IR_MSL); | |
548 | self->io.direction = IO_XMIT; | |
549 | ||
550 | /* Enable timer interrupt */ | |
551 | switch_bank(iobase, SET0); | |
552 | outb(ICR_ETMRI, iobase+ICR); | |
553 | } else { | |
554 | #endif | |
555 | IRDA_DEBUG(4, "%s(%ld), mtt=%d\n", __FUNCTION__ , jiffies, mtt); | |
556 | if (mtt) | |
557 | udelay(mtt); | |
558 | ||
559 | /* Enable DMA interrupt */ | |
560 | switch_bank(iobase, SET0); | |
561 | outb(ICR_EDMAI, iobase+ICR); | |
562 | w83977af_dma_write(self, iobase); | |
563 | #ifdef CONFIG_USE_INTERNAL_TIMER | |
564 | } | |
565 | #endif | |
566 | } else { | |
567 | self->tx_buff.data = self->tx_buff.head; | |
568 | self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, | |
569 | self->tx_buff.truesize); | |
570 | ||
571 | /* Add interrupt on tx low level (will fire immediately) */ | |
572 | switch_bank(iobase, SET0); | |
573 | outb(ICR_ETXTHI, iobase+ICR); | |
574 | } | |
575 | dev->trans_start = jiffies; | |
576 | dev_kfree_skb(skb); | |
577 | ||
578 | /* Restore set register */ | |
579 | outb(set, iobase+SSR); | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | /* | |
585 | * Function w83977af_dma_write (self, iobase) | |
586 | * | |
587 | * Send frame using DMA | |
588 | * | |
589 | */ | |
590 | static void w83977af_dma_write(struct w83977af_ir *self, int iobase) | |
591 | { | |
592 | __u8 set; | |
593 | #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS | |
594 | unsigned long flags; | |
595 | __u8 hcr; | |
596 | #endif | |
597 | IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__ , self->tx_buff.len); | |
598 | ||
599 | /* Save current set */ | |
600 | set = inb(iobase+SSR); | |
601 | ||
602 | /* Disable DMA */ | |
603 | switch_bank(iobase, SET0); | |
604 | outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR); | |
605 | ||
606 | /* Choose transmit DMA channel */ | |
607 | switch_bank(iobase, SET2); | |
608 | outb(ADCR1_D_CHSW|/*ADCR1_DMA_F|*/ADCR1_ADV_SL, iobase+ADCR1); | |
609 | #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS | |
610 | spin_lock_irqsave(&self->lock, flags); | |
611 | ||
612 | disable_dma(self->io.dma); | |
613 | clear_dma_ff(self->io.dma); | |
614 | set_dma_mode(self->io.dma, DMA_MODE_READ); | |
615 | set_dma_addr(self->io.dma, self->tx_buff_dma); | |
616 | set_dma_count(self->io.dma, self->tx_buff.len); | |
617 | #else | |
618 | irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len, | |
619 | DMA_MODE_WRITE); | |
620 | #endif | |
621 | self->io.direction = IO_XMIT; | |
622 | ||
623 | /* Enable DMA */ | |
624 | switch_bank(iobase, SET0); | |
625 | #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS | |
626 | hcr = inb(iobase+HCR); | |
627 | outb(hcr | HCR_EN_DMA, iobase+HCR); | |
628 | enable_dma(self->io.dma); | |
629 | spin_unlock_irqrestore(&self->lock, flags); | |
630 | #else | |
631 | outb(inb(iobase+HCR) | HCR_EN_DMA | HCR_TX_WT, iobase+HCR); | |
632 | #endif | |
633 | ||
634 | /* Restore set register */ | |
635 | outb(set, iobase+SSR); | |
636 | } | |
637 | ||
638 | /* | |
639 | * Function w83977af_pio_write (iobase, buf, len, fifo_size) | |
640 | * | |
641 | * | |
642 | * | |
643 | */ | |
644 | static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size) | |
645 | { | |
646 | int actual = 0; | |
647 | __u8 set; | |
648 | ||
649 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
650 | ||
651 | /* Save current bank */ | |
652 | set = inb(iobase+SSR); | |
653 | ||
654 | switch_bank(iobase, SET0); | |
655 | if (!(inb_p(iobase+USR) & USR_TSRE)) { | |
656 | IRDA_DEBUG(4, | |
657 | "%s(), warning, FIFO not empty yet!\n", __FUNCTION__ ); | |
658 | ||
659 | fifo_size -= 17; | |
660 | IRDA_DEBUG(4, "%s(), %d bytes left in tx fifo\n", | |
661 | __FUNCTION__ , fifo_size); | |
662 | } | |
663 | ||
664 | /* Fill FIFO with current frame */ | |
665 | while ((fifo_size-- > 0) && (actual < len)) { | |
666 | /* Transmit next byte */ | |
667 | outb(buf[actual++], iobase+TBR); | |
668 | } | |
669 | ||
670 | IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n", | |
671 | __FUNCTION__ , fifo_size, actual, len); | |
672 | ||
673 | /* Restore bank */ | |
674 | outb(set, iobase+SSR); | |
675 | ||
676 | return actual; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Function w83977af_dma_xmit_complete (self) | |
681 | * | |
682 | * The transfer of a frame in finished. So do the necessary things | |
683 | * | |
684 | * | |
685 | */ | |
686 | static void w83977af_dma_xmit_complete(struct w83977af_ir *self) | |
687 | { | |
688 | int iobase; | |
689 | __u8 set; | |
690 | ||
691 | IRDA_DEBUG(4, "%s(%ld)\n", __FUNCTION__ , jiffies); | |
692 | ||
693 | IRDA_ASSERT(self != NULL, return;); | |
694 | ||
695 | iobase = self->io.fir_base; | |
696 | ||
697 | /* Save current set */ | |
698 | set = inb(iobase+SSR); | |
699 | ||
700 | /* Disable DMA */ | |
701 | switch_bank(iobase, SET0); | |
702 | outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR); | |
703 | ||
704 | /* Check for underrrun! */ | |
705 | if (inb(iobase+AUDR) & AUDR_UNDR) { | |
706 | IRDA_DEBUG(0, "%s(), Transmit underrun!\n", __FUNCTION__ ); | |
707 | ||
708 | self->stats.tx_errors++; | |
709 | self->stats.tx_fifo_errors++; | |
710 | ||
711 | /* Clear bit, by writing 1 to it */ | |
712 | outb(AUDR_UNDR, iobase+AUDR); | |
713 | } else | |
714 | self->stats.tx_packets++; | |
715 | ||
716 | ||
717 | if (self->new_speed) { | |
718 | w83977af_change_speed(self, self->new_speed); | |
719 | self->new_speed = 0; | |
720 | } | |
721 | ||
722 | /* Unlock tx_buff and request another frame */ | |
723 | /* Tell the network layer, that we want more frames */ | |
724 | netif_wake_queue(self->netdev); | |
725 | ||
726 | /* Restore set */ | |
727 | outb(set, iobase+SSR); | |
728 | } | |
729 | ||
730 | /* | |
731 | * Function w83977af_dma_receive (self) | |
732 | * | |
733 | * Get ready for receiving a frame. The device will initiate a DMA | |
734 | * if it starts to receive a frame. | |
735 | * | |
736 | */ | |
737 | int w83977af_dma_receive(struct w83977af_ir *self) | |
738 | { | |
739 | int iobase; | |
740 | __u8 set; | |
741 | #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS | |
742 | unsigned long flags; | |
743 | __u8 hcr; | |
744 | #endif | |
745 | IRDA_ASSERT(self != NULL, return -1;); | |
746 | ||
747 | IRDA_DEBUG(4, "%s\n", __FUNCTION__ ); | |
748 | ||
749 | iobase= self->io.fir_base; | |
750 | ||
751 | /* Save current set */ | |
752 | set = inb(iobase+SSR); | |
753 | ||
754 | /* Disable DMA */ | |
755 | switch_bank(iobase, SET0); | |
756 | outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR); | |
757 | ||
758 | /* Choose DMA Rx, DMA Fairness, and Advanced mode */ | |
759 | switch_bank(iobase, SET2); | |
760 | outb((inb(iobase+ADCR1) & ~ADCR1_D_CHSW)/*|ADCR1_DMA_F*/|ADCR1_ADV_SL, | |
761 | iobase+ADCR1); | |
762 | ||
763 | self->io.direction = IO_RECV; | |
764 | self->rx_buff.data = self->rx_buff.head; | |
765 | ||
766 | #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS | |
767 | spin_lock_irqsave(&self->lock, flags); | |
768 | ||
769 | disable_dma(self->io.dma); | |
770 | clear_dma_ff(self->io.dma); | |
771 | set_dma_mode(self->io.dma, DMA_MODE_READ); | |
772 | set_dma_addr(self->io.dma, self->rx_buff_dma); | |
773 | set_dma_count(self->io.dma, self->rx_buff.truesize); | |
774 | #else | |
775 | irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize, | |
776 | DMA_MODE_READ); | |
777 | #endif | |
778 | /* | |
779 | * Reset Rx FIFO. This will also flush the ST_FIFO, it's very | |
780 | * important that we don't reset the Tx FIFO since it might not | |
781 | * be finished transmitting yet | |
782 | */ | |
783 | switch_bank(iobase, SET0); | |
784 | outb(UFR_RXTL|UFR_TXTL|UFR_RXF_RST|UFR_EN_FIFO, iobase+UFR); | |
785 | self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0; | |
786 | ||
787 | /* Enable DMA */ | |
788 | switch_bank(iobase, SET0); | |
789 | #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS | |
790 | hcr = inb(iobase+HCR); | |
791 | outb(hcr | HCR_EN_DMA, iobase+HCR); | |
792 | enable_dma(self->io.dma); | |
793 | spin_unlock_irqrestore(&self->lock, flags); | |
794 | #else | |
795 | outb(inb(iobase+HCR) | HCR_EN_DMA, iobase+HCR); | |
796 | #endif | |
797 | /* Restore set */ | |
798 | outb(set, iobase+SSR); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Function w83977af_receive_complete (self) | |
805 | * | |
806 | * Finished with receiving a frame | |
807 | * | |
808 | */ | |
809 | int w83977af_dma_receive_complete(struct w83977af_ir *self) | |
810 | { | |
811 | struct sk_buff *skb; | |
812 | struct st_fifo *st_fifo; | |
813 | int len; | |
814 | int iobase; | |
815 | __u8 set; | |
816 | __u8 status; | |
817 | ||
818 | IRDA_DEBUG(4, "%s\n", __FUNCTION__ ); | |
819 | ||
820 | st_fifo = &self->st_fifo; | |
821 | ||
822 | iobase = self->io.fir_base; | |
823 | ||
824 | /* Save current set */ | |
825 | set = inb(iobase+SSR); | |
826 | ||
827 | iobase = self->io.fir_base; | |
828 | ||
829 | /* Read status FIFO */ | |
830 | switch_bank(iobase, SET5); | |
831 | while ((status = inb(iobase+FS_FO)) & FS_FO_FSFDR) { | |
832 | st_fifo->entries[st_fifo->tail].status = status; | |
833 | ||
834 | st_fifo->entries[st_fifo->tail].len = inb(iobase+RFLFL); | |
835 | st_fifo->entries[st_fifo->tail].len |= inb(iobase+RFLFH) << 8; | |
836 | ||
837 | st_fifo->tail++; | |
838 | st_fifo->len++; | |
839 | } | |
840 | ||
841 | while (st_fifo->len) { | |
842 | /* Get first entry */ | |
843 | status = st_fifo->entries[st_fifo->head].status; | |
844 | len = st_fifo->entries[st_fifo->head].len; | |
845 | st_fifo->head++; | |
846 | st_fifo->len--; | |
847 | ||
848 | /* Check for errors */ | |
849 | if (status & FS_FO_ERR_MSK) { | |
850 | if (status & FS_FO_LST_FR) { | |
851 | /* Add number of lost frames to stats */ | |
852 | self->stats.rx_errors += len; | |
853 | } else { | |
854 | /* Skip frame */ | |
855 | self->stats.rx_errors++; | |
856 | ||
857 | self->rx_buff.data += len; | |
858 | ||
859 | if (status & FS_FO_MX_LEX) | |
860 | self->stats.rx_length_errors++; | |
861 | ||
862 | if (status & FS_FO_PHY_ERR) | |
863 | self->stats.rx_frame_errors++; | |
864 | ||
865 | if (status & FS_FO_CRC_ERR) | |
866 | self->stats.rx_crc_errors++; | |
867 | } | |
868 | /* The errors below can be reported in both cases */ | |
869 | if (status & FS_FO_RX_OV) | |
870 | self->stats.rx_fifo_errors++; | |
871 | ||
872 | if (status & FS_FO_FSF_OV) | |
873 | self->stats.rx_fifo_errors++; | |
874 | ||
875 | } else { | |
876 | /* Check if we have transferred all data to memory */ | |
877 | switch_bank(iobase, SET0); | |
878 | if (inb(iobase+USR) & USR_RDR) { | |
879 | #ifdef CONFIG_USE_INTERNAL_TIMER | |
880 | /* Put this entry back in fifo */ | |
881 | st_fifo->head--; | |
882 | st_fifo->len++; | |
883 | st_fifo->entries[st_fifo->head].status = status; | |
884 | st_fifo->entries[st_fifo->head].len = len; | |
885 | ||
886 | /* Restore set register */ | |
887 | outb(set, iobase+SSR); | |
888 | ||
889 | return FALSE; /* I'll be back! */ | |
890 | #else | |
891 | udelay(80); /* Should be enough!? */ | |
892 | #endif | |
893 | } | |
894 | ||
895 | skb = dev_alloc_skb(len+1); | |
896 | if (skb == NULL) { | |
897 | printk(KERN_INFO | |
898 | "%s(), memory squeeze, dropping frame.\n", __FUNCTION__); | |
899 | /* Restore set register */ | |
900 | outb(set, iobase+SSR); | |
901 | ||
902 | return FALSE; | |
903 | } | |
904 | ||
905 | /* Align to 20 bytes */ | |
906 | skb_reserve(skb, 1); | |
907 | ||
908 | /* Copy frame without CRC */ | |
909 | if (self->io.speed < 4000000) { | |
910 | skb_put(skb, len-2); | |
27d7ff46 ACM |
911 | skb_copy_to_linear_data(skb, |
912 | self->rx_buff.data, | |
913 | len - 2); | |
1da177e4 LT |
914 | } else { |
915 | skb_put(skb, len-4); | |
27d7ff46 ACM |
916 | skb_copy_to_linear_data(skb, |
917 | self->rx_buff.data, | |
918 | len - 4); | |
1da177e4 LT |
919 | } |
920 | ||
921 | /* Move to next frame */ | |
922 | self->rx_buff.data += len; | |
923 | self->stats.rx_packets++; | |
924 | ||
925 | skb->dev = self->netdev; | |
459a98ed | 926 | skb_reset_mac_header(skb); |
1da177e4 LT |
927 | skb->protocol = htons(ETH_P_IRDA); |
928 | netif_rx(skb); | |
929 | self->netdev->last_rx = jiffies; | |
930 | } | |
931 | } | |
932 | /* Restore set register */ | |
933 | outb(set, iobase+SSR); | |
934 | ||
935 | return TRUE; | |
936 | } | |
937 | ||
938 | /* | |
939 | * Function pc87108_pio_receive (self) | |
940 | * | |
941 | * Receive all data in receiver FIFO | |
942 | * | |
943 | */ | |
944 | static void w83977af_pio_receive(struct w83977af_ir *self) | |
945 | { | |
946 | __u8 byte = 0x00; | |
947 | int iobase; | |
948 | ||
949 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
950 | ||
951 | IRDA_ASSERT(self != NULL, return;); | |
952 | ||
953 | iobase = self->io.fir_base; | |
954 | ||
955 | /* Receive all characters in Rx FIFO */ | |
956 | do { | |
957 | byte = inb(iobase+RBR); | |
958 | async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, | |
959 | byte); | |
960 | } while (inb(iobase+USR) & USR_RDR); /* Data available */ | |
961 | } | |
962 | ||
963 | /* | |
964 | * Function w83977af_sir_interrupt (self, eir) | |
965 | * | |
966 | * Handle SIR interrupt | |
967 | * | |
968 | */ | |
969 | static __u8 w83977af_sir_interrupt(struct w83977af_ir *self, int isr) | |
970 | { | |
971 | int actual; | |
972 | __u8 new_icr = 0; | |
973 | __u8 set; | |
974 | int iobase; | |
975 | ||
976 | IRDA_DEBUG(4, "%s(), isr=%#x\n", __FUNCTION__ , isr); | |
977 | ||
978 | iobase = self->io.fir_base; | |
979 | /* Transmit FIFO low on data */ | |
980 | if (isr & ISR_TXTH_I) { | |
981 | /* Write data left in transmit buffer */ | |
982 | actual = w83977af_pio_write(self->io.fir_base, | |
983 | self->tx_buff.data, | |
984 | self->tx_buff.len, | |
985 | self->io.fifo_size); | |
986 | ||
987 | self->tx_buff.data += actual; | |
988 | self->tx_buff.len -= actual; | |
989 | ||
990 | self->io.direction = IO_XMIT; | |
991 | ||
992 | /* Check if finished */ | |
993 | if (self->tx_buff.len > 0) { | |
994 | new_icr |= ICR_ETXTHI; | |
995 | } else { | |
996 | set = inb(iobase+SSR); | |
997 | switch_bank(iobase, SET0); | |
998 | outb(AUDR_SFEND, iobase+AUDR); | |
999 | outb(set, iobase+SSR); | |
1000 | ||
1001 | self->stats.tx_packets++; | |
1002 | ||
1003 | /* Feed me more packets */ | |
1004 | netif_wake_queue(self->netdev); | |
1005 | new_icr |= ICR_ETBREI; | |
1006 | } | |
1007 | } | |
1008 | /* Check if transmission has completed */ | |
1009 | if (isr & ISR_TXEMP_I) { | |
1010 | /* Check if we need to change the speed? */ | |
1011 | if (self->new_speed) { | |
1012 | IRDA_DEBUG(2, | |
1013 | "%s(), Changing speed!\n", __FUNCTION__ ); | |
1014 | w83977af_change_speed(self, self->new_speed); | |
1015 | self->new_speed = 0; | |
1016 | } | |
1017 | ||
1018 | /* Turn around and get ready to receive some data */ | |
1019 | self->io.direction = IO_RECV; | |
1020 | new_icr |= ICR_ERBRI; | |
1021 | } | |
1022 | ||
1023 | /* Rx FIFO threshold or timeout */ | |
1024 | if (isr & ISR_RXTH_I) { | |
1025 | w83977af_pio_receive(self); | |
1026 | ||
1027 | /* Keep receiving */ | |
1028 | new_icr |= ICR_ERBRI; | |
1029 | } | |
1030 | return new_icr; | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Function pc87108_fir_interrupt (self, eir) | |
1035 | * | |
1036 | * Handle MIR/FIR interrupt | |
1037 | * | |
1038 | */ | |
1039 | static __u8 w83977af_fir_interrupt(struct w83977af_ir *self, int isr) | |
1040 | { | |
1041 | __u8 new_icr = 0; | |
1042 | __u8 set; | |
1043 | int iobase; | |
1044 | ||
1045 | iobase = self->io.fir_base; | |
1046 | set = inb(iobase+SSR); | |
1047 | ||
1048 | /* End of frame detected in FIFO */ | |
1049 | if (isr & (ISR_FEND_I|ISR_FSF_I)) { | |
1050 | if (w83977af_dma_receive_complete(self)) { | |
1051 | ||
1052 | /* Wait for next status FIFO interrupt */ | |
1053 | new_icr |= ICR_EFSFI; | |
1054 | } else { | |
1055 | /* DMA not finished yet */ | |
1056 | ||
1057 | /* Set timer value, resolution 1 ms */ | |
1058 | switch_bank(iobase, SET4); | |
1059 | outb(0x01, iobase+TMRL); /* 1 ms */ | |
1060 | outb(0x00, iobase+TMRH); | |
1061 | ||
1062 | /* Start timer */ | |
1063 | outb(IR_MSL_EN_TMR, iobase+IR_MSL); | |
1064 | ||
1065 | new_icr |= ICR_ETMRI; | |
1066 | } | |
1067 | } | |
1068 | /* Timer finished */ | |
1069 | if (isr & ISR_TMR_I) { | |
1070 | /* Disable timer */ | |
1071 | switch_bank(iobase, SET4); | |
1072 | outb(0, iobase+IR_MSL); | |
1073 | ||
1074 | /* Clear timer event */ | |
1075 | /* switch_bank(iobase, SET0); */ | |
1076 | /* outb(ASCR_CTE, iobase+ASCR); */ | |
1077 | ||
1078 | /* Check if this is a TX timer interrupt */ | |
1079 | if (self->io.direction == IO_XMIT) { | |
1080 | w83977af_dma_write(self, iobase); | |
1081 | ||
1082 | new_icr |= ICR_EDMAI; | |
1083 | } else { | |
1084 | /* Check if DMA has now finished */ | |
1085 | w83977af_dma_receive_complete(self); | |
1086 | ||
1087 | new_icr |= ICR_EFSFI; | |
1088 | } | |
1089 | } | |
1090 | /* Finished with DMA */ | |
1091 | if (isr & ISR_DMA_I) { | |
1092 | w83977af_dma_xmit_complete(self); | |
1093 | ||
1094 | /* Check if there are more frames to be transmitted */ | |
1095 | /* if (irda_device_txqueue_empty(self)) { */ | |
1096 | ||
1097 | /* Prepare for receive | |
1098 | * | |
1099 | * ** Netwinder Tx DMA likes that we do this anyway ** | |
1100 | */ | |
1101 | w83977af_dma_receive(self); | |
1102 | new_icr = ICR_EFSFI; | |
1103 | /* } */ | |
1104 | } | |
1105 | ||
1106 | /* Restore set */ | |
1107 | outb(set, iobase+SSR); | |
1108 | ||
1109 | return new_icr; | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * Function w83977af_interrupt (irq, dev_id, regs) | |
1114 | * | |
1115 | * An interrupt from the chip has arrived. Time to do some work | |
1116 | * | |
1117 | */ | |
7d12e780 | 1118 | static irqreturn_t w83977af_interrupt(int irq, void *dev_id) |
1da177e4 | 1119 | { |
c31f28e7 | 1120 | struct net_device *dev = dev_id; |
1da177e4 LT |
1121 | struct w83977af_ir *self; |
1122 | __u8 set, icr, isr; | |
1123 | int iobase; | |
1124 | ||
c31f28e7 | 1125 | self = dev->priv; |
1da177e4 LT |
1126 | |
1127 | iobase = self->io.fir_base; | |
1128 | ||
1129 | /* Save current bank */ | |
1130 | set = inb(iobase+SSR); | |
1131 | switch_bank(iobase, SET0); | |
1132 | ||
1133 | icr = inb(iobase+ICR); | |
1134 | isr = inb(iobase+ISR) & icr; /* Mask out the interesting ones */ | |
1135 | ||
1136 | outb(0, iobase+ICR); /* Disable interrupts */ | |
1137 | ||
1138 | if (isr) { | |
1139 | /* Dispatch interrupt handler for the current speed */ | |
1140 | if (self->io.speed > PIO_MAX_SPEED ) | |
1141 | icr = w83977af_fir_interrupt(self, isr); | |
1142 | else | |
1143 | icr = w83977af_sir_interrupt(self, isr); | |
1144 | } | |
1145 | ||
1146 | outb(icr, iobase+ICR); /* Restore (new) interrupts */ | |
1147 | outb(set, iobase+SSR); /* Restore bank register */ | |
1148 | return IRQ_RETVAL(isr); | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Function w83977af_is_receiving (self) | |
1153 | * | |
1154 | * Return TRUE is we are currently receiving a frame | |
1155 | * | |
1156 | */ | |
1157 | static int w83977af_is_receiving(struct w83977af_ir *self) | |
1158 | { | |
1159 | int status = FALSE; | |
1160 | int iobase; | |
1161 | __u8 set; | |
1162 | ||
1163 | IRDA_ASSERT(self != NULL, return FALSE;); | |
1164 | ||
1165 | if (self->io.speed > 115200) { | |
1166 | iobase = self->io.fir_base; | |
1167 | ||
1168 | /* Check if rx FIFO is not empty */ | |
1169 | set = inb(iobase+SSR); | |
1170 | switch_bank(iobase, SET2); | |
1171 | if ((inb(iobase+RXFDTH) & 0x3f) != 0) { | |
1172 | /* We are receiving something */ | |
1173 | status = TRUE; | |
1174 | } | |
1175 | outb(set, iobase+SSR); | |
1176 | } else | |
1177 | status = (self->rx_buff.state != OUTSIDE_FRAME); | |
1178 | ||
1179 | return status; | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * Function w83977af_net_open (dev) | |
1184 | * | |
1185 | * Start the device | |
1186 | * | |
1187 | */ | |
1188 | static int w83977af_net_open(struct net_device *dev) | |
1189 | { | |
1190 | struct w83977af_ir *self; | |
1191 | int iobase; | |
1192 | char hwname[32]; | |
1193 | __u8 set; | |
1194 | ||
1195 | IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); | |
1196 | ||
1197 | IRDA_ASSERT(dev != NULL, return -1;); | |
1198 | self = (struct w83977af_ir *) dev->priv; | |
1199 | ||
1200 | IRDA_ASSERT(self != NULL, return 0;); | |
1201 | ||
1202 | iobase = self->io.fir_base; | |
1203 | ||
1204 | if (request_irq(self->io.irq, w83977af_interrupt, 0, dev->name, | |
1205 | (void *) dev)) { | |
1206 | return -EAGAIN; | |
1207 | } | |
1208 | /* | |
1209 | * Always allocate the DMA channel after the IRQ, | |
1210 | * and clean up on failure. | |
1211 | */ | |
1212 | if (request_dma(self->io.dma, dev->name)) { | |
1213 | free_irq(self->io.irq, self); | |
1214 | return -EAGAIN; | |
1215 | } | |
1216 | ||
1217 | /* Save current set */ | |
1218 | set = inb(iobase+SSR); | |
1219 | ||
1220 | /* Enable some interrupts so we can receive frames again */ | |
1221 | switch_bank(iobase, SET0); | |
1222 | if (self->io.speed > 115200) { | |
1223 | outb(ICR_EFSFI, iobase+ICR); | |
1224 | w83977af_dma_receive(self); | |
1225 | } else | |
1226 | outb(ICR_ERBRI, iobase+ICR); | |
1227 | ||
1228 | /* Restore bank register */ | |
1229 | outb(set, iobase+SSR); | |
1230 | ||
1231 | /* Ready to play! */ | |
1232 | netif_start_queue(dev); | |
1233 | ||
1234 | /* Give self a hardware name */ | |
1235 | sprintf(hwname, "w83977af @ 0x%03x", self->io.fir_base); | |
1236 | ||
1237 | /* | |
1238 | * Open new IrLAP layer instance, now that everything should be | |
1239 | * initialized properly | |
1240 | */ | |
1241 | self->irlap = irlap_open(dev, &self->qos, hwname); | |
1242 | ||
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * Function w83977af_net_close (dev) | |
1248 | * | |
1249 | * Stop the device | |
1250 | * | |
1251 | */ | |
1252 | static int w83977af_net_close(struct net_device *dev) | |
1253 | { | |
1254 | struct w83977af_ir *self; | |
1255 | int iobase; | |
1256 | __u8 set; | |
1257 | ||
1258 | IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); | |
1259 | ||
1260 | IRDA_ASSERT(dev != NULL, return -1;); | |
1261 | ||
1262 | self = (struct w83977af_ir *) dev->priv; | |
1263 | ||
1264 | IRDA_ASSERT(self != NULL, return 0;); | |
1265 | ||
1266 | iobase = self->io.fir_base; | |
1267 | ||
1268 | /* Stop device */ | |
1269 | netif_stop_queue(dev); | |
1270 | ||
1271 | /* Stop and remove instance of IrLAP */ | |
1272 | if (self->irlap) | |
1273 | irlap_close(self->irlap); | |
1274 | self->irlap = NULL; | |
1275 | ||
1276 | disable_dma(self->io.dma); | |
1277 | ||
1278 | /* Save current set */ | |
1279 | set = inb(iobase+SSR); | |
1280 | ||
1281 | /* Disable interrupts */ | |
1282 | switch_bank(iobase, SET0); | |
1283 | outb(0, iobase+ICR); | |
1284 | ||
1285 | free_irq(self->io.irq, dev); | |
1286 | free_dma(self->io.dma); | |
1287 | ||
1288 | /* Restore bank register */ | |
1289 | outb(set, iobase+SSR); | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | /* | |
1295 | * Function w83977af_net_ioctl (dev, rq, cmd) | |
1296 | * | |
1297 | * Process IOCTL commands for this device | |
1298 | * | |
1299 | */ | |
1300 | static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1301 | { | |
1302 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
1303 | struct w83977af_ir *self; | |
1304 | unsigned long flags; | |
1305 | int ret = 0; | |
1306 | ||
1307 | IRDA_ASSERT(dev != NULL, return -1;); | |
1308 | ||
1309 | self = dev->priv; | |
1310 | ||
1311 | IRDA_ASSERT(self != NULL, return -1;); | |
1312 | ||
1313 | IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd); | |
1314 | ||
1315 | spin_lock_irqsave(&self->lock, flags); | |
1316 | ||
1317 | switch (cmd) { | |
1318 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
1319 | if (!capable(CAP_NET_ADMIN)) { | |
1320 | ret = -EPERM; | |
1321 | goto out; | |
1322 | } | |
1323 | w83977af_change_speed(self, irq->ifr_baudrate); | |
1324 | break; | |
1325 | case SIOCSMEDIABUSY: /* Set media busy */ | |
1326 | if (!capable(CAP_NET_ADMIN)) { | |
1327 | ret = -EPERM; | |
1328 | goto out; | |
1329 | } | |
1330 | irda_device_set_media_busy(self->netdev, TRUE); | |
1331 | break; | |
1332 | case SIOCGRECEIVING: /* Check if we are receiving right now */ | |
1333 | irq->ifr_receiving = w83977af_is_receiving(self); | |
1334 | break; | |
1335 | default: | |
1336 | ret = -EOPNOTSUPP; | |
1337 | } | |
1338 | out: | |
1339 | spin_unlock_irqrestore(&self->lock, flags); | |
1340 | return ret; | |
1341 | } | |
1342 | ||
1343 | static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev) | |
1344 | { | |
1345 | struct w83977af_ir *self = (struct w83977af_ir *) dev->priv; | |
1346 | ||
1347 | return &self->stats; | |
1348 | } | |
1349 | ||
1350 | MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); | |
1351 | MODULE_DESCRIPTION("Winbond W83977AF IrDA Device Driver"); | |
1352 | MODULE_LICENSE("GPL"); | |
1353 | ||
1354 | ||
1355 | module_param(qos_mtt_bits, int, 0); | |
1356 | MODULE_PARM_DESC(qos_mtt_bits, "Mimimum Turn Time"); | |
1357 | module_param_array(io, int, NULL, 0); | |
1358 | MODULE_PARM_DESC(io, "Base I/O addresses"); | |
1359 | module_param_array(irq, int, NULL, 0); | |
1360 | MODULE_PARM_DESC(irq, "IRQ lines"); | |
1361 | ||
1362 | /* | |
1363 | * Function init_module (void) | |
1364 | * | |
1365 | * | |
1366 | * | |
1367 | */ | |
1368 | module_init(w83977af_init); | |
1369 | ||
1370 | /* | |
1371 | * Function cleanup_module (void) | |
1372 | * | |
1373 | * | |
1374 | * | |
1375 | */ | |
1376 | module_exit(w83977af_cleanup); |