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i2c-viapro: Add support for the VT8237A and VT8251
[linux/fpc-iii.git] / drivers / net / irda / smsc-ircc2.c
blobec94ecdb103dcfa508ce105a1b9e2bf805c76317
1 /*********************************************************************
2 * $Id: smsc-ircc2.c,v 1.19.2.5 2002/10/27 11:34:26 dip Exp $
3 *
4 * Description: Driver for the SMC Infrared Communications Controller
5 * Status: Experimental.
6 * Author: Daniele Peri (peri@csai.unipa.it)
7 * Created at:
8 * Modified at:
9 * Modified by:
10 *
11 * Copyright (c) 2002 Daniele Peri
12 * All Rights Reserved.
13 * Copyright (c) 2002 Jean Tourrilhes
14 *
15 *
16 * Based on smc-ircc.c:
17 *
18 * Copyright (c) 2001 Stefani Seibold
19 * Copyright (c) 1999-2001 Dag Brattli
20 * Copyright (c) 1998-1999 Thomas Davis,
21 *
22 * and irport.c:
23 *
24 * Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
25 *
26 *
27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License as
29 * published by the Free Software Foundation; either version 2 of
30 * the License, or (at your option) any later version.
31 *
32 * This program is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 * GNU General Public License for more details.
36 *
37 * You should have received a copy of the GNU General Public License
38 * along with this program; if not, write to the Free Software
39 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
40 * MA 02111-1307 USA
41 *
42 ********************************************************************/
43
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/types.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/ioport.h>
50 #include <linux/delay.h>
51 #include <linux/slab.h>
52 #include <linux/init.h>
53 #include <linux/rtnetlink.h>
54 #include <linux/serial_reg.h>
55 #include <linux/dma-mapping.h>
56 #include <linux/platform_device.h>
57
58 #include <asm/io.h>
59 #include <asm/dma.h>
60 #include <asm/byteorder.h>
61
62 #include <linux/spinlock.h>
63 #include <linux/pm.h>
64
65 #include <net/irda/wrapper.h>
66 #include <net/irda/irda.h>
67 #include <net/irda/irda_device.h>
68
69 #include "smsc-ircc2.h"
70 #include "smsc-sio.h"
71
72
73 MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
74 MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
75 MODULE_LICENSE("GPL");
76
77 static int ircc_dma = 255;
78 module_param(ircc_dma, int, 0);
79 MODULE_PARM_DESC(ircc_dma, "DMA channel");
80
81 static int ircc_irq = 255;
82 module_param(ircc_irq, int, 0);
83 MODULE_PARM_DESC(ircc_irq, "IRQ line");
84
85 static int ircc_fir;
86 module_param(ircc_fir, int, 0);
87 MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
88
89 static int ircc_sir;
90 module_param(ircc_sir, int, 0);
91 MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
92
93 static int ircc_cfg;
94 module_param(ircc_cfg, int, 0);
95 MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
96
97 static int ircc_transceiver;
98 module_param(ircc_transceiver, int, 0);
99 MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
100
101 /* Types */
102
103 struct smsc_transceiver {
104 char *name;
105 void (*set_for_speed)(int fir_base, u32 speed);
106 int (*probe)(int fir_base);
107 };
108
109 struct smsc_chip {
110 char *name;
111 #if 0
112 u8 type;
113 #endif
114 u16 flags;
115 u8 devid;
116 u8 rev;
117 };
118
119 struct smsc_chip_address {
120 unsigned int cfg_base;
121 unsigned int type;
122 };
123
124 /* Private data for each instance */
125 struct smsc_ircc_cb {
126 struct net_device *netdev; /* Yes! we are some kind of netdevice */
127 struct net_device_stats stats;
128 struct irlap_cb *irlap; /* The link layer we are binded to */
129
130 chipio_t io; /* IrDA controller information */
131 iobuff_t tx_buff; /* Transmit buffer */
132 iobuff_t rx_buff; /* Receive buffer */
133 dma_addr_t tx_buff_dma;
134 dma_addr_t rx_buff_dma;
135
136 struct qos_info qos; /* QoS capabilities for this device */
137
138 spinlock_t lock; /* For serializing operations */
139
140 __u32 new_speed;
141 __u32 flags; /* Interface flags */
142
143 int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
144 int tx_len; /* Number of frames in tx_buff */
145
146 int transceiver;
147 struct platform_device *pldev;
148 };
149
150 /* Constants */
151
152 #define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
153
154 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
155 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
156 #define SMSC_IRCC2_C_NET_TIMEOUT 0
157 #define SMSC_IRCC2_C_SIR_STOP 0
158
159 static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
160
161 /* Prototypes */
162
163 static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
164 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
165 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
166 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
167 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
168 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
169 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
170 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
171 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
172 static int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
173 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
174 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs);
175 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self);
176 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed);
177 static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, u32 speed);
178 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
179 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
180 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
181 #if SMSC_IRCC2_C_SIR_STOP
182 static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
183 #endif
184 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
185 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
186 static int smsc_ircc_net_open(struct net_device *dev);
187 static int smsc_ircc_net_close(struct net_device *dev);
188 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
189 #if SMSC_IRCC2_C_NET_TIMEOUT
190 static void smsc_ircc_timeout(struct net_device *dev);
191 #endif
192 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
193 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
194 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
195 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
196 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
197
198 /* Probing */
199 static int __init smsc_ircc_look_for_chips(void);
200 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
201 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
202 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
203 static int __init smsc_superio_fdc(unsigned short cfg_base);
204 static int __init smsc_superio_lpc(unsigned short cfg_base);
205
206 /* Transceivers specific functions */
207
208 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
209 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
210 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
211 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
212 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
213 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
214
215 /* Power Management */
216
217 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
218 static int smsc_ircc_resume(struct platform_device *dev);
219
220 static struct platform_driver smsc_ircc_driver = {
221 .suspend = smsc_ircc_suspend,
222 .resume = smsc_ircc_resume,
223 .driver = {
224 .name = SMSC_IRCC2_DRIVER_NAME,
225 },
226 };
227
228 /* Transceivers for SMSC-ircc */
229
230 static struct smsc_transceiver smsc_transceivers[] =
231 {
232 { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
233 { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
234 { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
235 { NULL, NULL }
236 };
237 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
238
239 /* SMC SuperIO chipsets definitions */
240
241 #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
242 #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
243 #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
244 #define SIR 0 /* SuperIO Chip has only slow IRDA */
245 #define FIR 4 /* SuperIO Chip has fast IRDA */
246 #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
247
248 static struct smsc_chip __initdata fdc_chips_flat[] =
249 {
250 /* Base address 0x3f0 or 0x370 */
251 { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
252 { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
253 { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
254 { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
255 { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
256 { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
257 { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
258 { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
259 { NULL }
260 };
261
262 static struct smsc_chip __initdata fdc_chips_paged[] =
263 {
264 /* Base address 0x3f0 or 0x370 */
265 { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
266 { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
267 { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
268 { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
269 { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
270 { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
271 { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
272 { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
273 { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
274 { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
275 { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
276 { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
277 { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
278 { NULL }
279 };
280
281 static struct smsc_chip __initdata lpc_chips_flat[] =
282 {
283 /* Base address 0x2E or 0x4E */
284 { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
285 { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
286 { NULL }
287 };
288
289 static struct smsc_chip __initdata lpc_chips_paged[] =
290 {
291 /* Base address 0x2E or 0x4E */
292 { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
293 { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
294 { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
295 { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
296 { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
297 { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
298 { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
299 { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
300 { NULL }
301 };
302
303 #define SMSCSIO_TYPE_FDC 1
304 #define SMSCSIO_TYPE_LPC 2
305 #define SMSCSIO_TYPE_FLAT 4
306 #define SMSCSIO_TYPE_PAGED 8
307
308 static struct smsc_chip_address __initdata possible_addresses[] =
309 {
310 { 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
311 { 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
312 { 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
313 { 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
314 { 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
315 { 0, 0 }
316 };
317
318 /* Globals */
319
320 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
321 static unsigned short dev_count;
322
323 static inline void register_bank(int iobase, int bank)
324 {
325 outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
326 iobase + IRCC_MASTER);
327 }
328
329
330 /*******************************************************************************
331 *
332 *
333 * SMSC-ircc stuff
334 *
335 *
336 *******************************************************************************/
337
338 /*
339 * Function smsc_ircc_init ()
340 *
341 * Initialize chip. Just try to find out how many chips we are dealing with
342 * and where they are
343 */
344 static int __init smsc_ircc_init(void)
345 {
346 int ret;
347
348 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
349
350 ret = platform_driver_register(&smsc_ircc_driver);
351 if (ret) {
352 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
353 return ret;
354 }
355
356 dev_count = 0;
357
358 if (ircc_fir > 0 && ircc_sir > 0) {
359 IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
360 IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
361
362 if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq))
363 ret = -ENODEV;
364 } else {
365 ret = -ENODEV;
366
367 /* try user provided configuration register base address */
368 if (ircc_cfg > 0) {
369 IRDA_MESSAGE(" Overriding configuration address "
370 "0x%04x\n", ircc_cfg);
371 if (!smsc_superio_fdc(ircc_cfg))
372 ret = 0;
373 if (!smsc_superio_lpc(ircc_cfg))
374 ret = 0;
375 }
376
377 if (smsc_ircc_look_for_chips() > 0)
378 ret = 0;
379 }
380
381 if (ret)
382 platform_driver_unregister(&smsc_ircc_driver);
383
384 return ret;
385 }
386
387 /*
388 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
389 *
390 * Try to open driver instance
391 *
392 */
393 static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
394 {
395 struct smsc_ircc_cb *self;
396 struct net_device *dev;
397 int err;
398
399 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
400
401 err = smsc_ircc_present(fir_base, sir_base);
402 if (err)
403 goto err_out;
404
405 err = -ENOMEM;
406 if (dev_count >= ARRAY_SIZE(dev_self)) {
407 IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
408 goto err_out1;
409 }
410
411 /*
412 * Allocate new instance of the driver
413 */
414 dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
415 if (!dev) {
416 IRDA_WARNING("%s() can't allocate net device\n", __FUNCTION__);
417 goto err_out1;
418 }
419
420 SET_MODULE_OWNER(dev);
421
422 dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
423 #if SMSC_IRCC2_C_NET_TIMEOUT
424 dev->tx_timeout = smsc_ircc_timeout;
425 dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
426 #endif
427 dev->open = smsc_ircc_net_open;
428 dev->stop = smsc_ircc_net_close;
429 dev->do_ioctl = smsc_ircc_net_ioctl;
430 dev->get_stats = smsc_ircc_net_get_stats;
431
432 self = netdev_priv(dev);
433 self->netdev = dev;
434
435 /* Make ifconfig display some details */
436 dev->base_addr = self->io.fir_base = fir_base;
437 dev->irq = self->io.irq = irq;
438
439 /* Need to store self somewhere */
440 dev_self[dev_count] = self;
441 spin_lock_init(&self->lock);
442
443 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
444 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
445
446 self->rx_buff.head =
447 dma_alloc_coherent(NULL, self->rx_buff.truesize,
448 &self->rx_buff_dma, GFP_KERNEL);
449 if (self->rx_buff.head == NULL) {
450 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
451 driver_name);
452 goto err_out2;
453 }
454
455 self->tx_buff.head =
456 dma_alloc_coherent(NULL, self->tx_buff.truesize,
457 &self->tx_buff_dma, GFP_KERNEL);
458 if (self->tx_buff.head == NULL) {
459 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
460 driver_name);
461 goto err_out3;
462 }
463
464 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
465 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
466
467 self->rx_buff.in_frame = FALSE;
468 self->rx_buff.state = OUTSIDE_FRAME;
469 self->tx_buff.data = self->tx_buff.head;
470 self->rx_buff.data = self->rx_buff.head;
471
472 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
473 smsc_ircc_setup_qos(self);
474 smsc_ircc_init_chip(self);
475
476 if (ircc_transceiver > 0 &&
477 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
478 self->transceiver = ircc_transceiver;
479 else
480 smsc_ircc_probe_transceiver(self);
481
482 err = register_netdev(self->netdev);
483 if (err) {
484 IRDA_ERROR("%s, Network device registration failed!\n",
485 driver_name);
486 goto err_out4;
487 }
488
489 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
490 dev_count, NULL, 0);
491 if (IS_ERR(self->pldev)) {
492 err = PTR_ERR(self->pldev);
493 goto err_out5;
494 }
495 platform_set_drvdata(self->pldev, self);
496
497 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
498 dev_count++;
499
500 return 0;
501
502 err_out5:
503 unregister_netdev(self->netdev);
504
505 err_out4:
506 dma_free_coherent(NULL, self->tx_buff.truesize,
507 self->tx_buff.head, self->tx_buff_dma);
508 err_out3:
509 dma_free_coherent(NULL, self->rx_buff.truesize,
510 self->rx_buff.head, self->rx_buff_dma);
511 err_out2:
512 free_netdev(self->netdev);
513 dev_self[dev_count] = NULL;
514 err_out1:
515 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
516 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
517 err_out:
518 return err;
519 }
520
521 /*
522 * Function smsc_ircc_present(fir_base, sir_base)
523 *
524 * Check the smsc-ircc chip presence
525 *
526 */
527 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
528 {
529 unsigned char low, high, chip, config, dma, irq, version;
530
531 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
532 driver_name)) {
533 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
534 __FUNCTION__, fir_base);
535 goto out1;
536 }
537
538 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
539 driver_name)) {
540 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
541 __FUNCTION__, sir_base);
542 goto out2;
543 }
544
545 register_bank(fir_base, 3);
546
547 high = inb(fir_base + IRCC_ID_HIGH);
548 low = inb(fir_base + IRCC_ID_LOW);
549 chip = inb(fir_base + IRCC_CHIP_ID);
550 version = inb(fir_base + IRCC_VERSION);
551 config = inb(fir_base + IRCC_INTERFACE);
552 dma = config & IRCC_INTERFACE_DMA_MASK;
553 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
554
555 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
556 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
557 __FUNCTION__, fir_base);
558 goto out3;
559 }
560 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
561 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
562 chip & 0x0f, version, fir_base, sir_base, dma, irq);
563
564 return 0;
565
566 out3:
567 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
568 out2:
569 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
570 out1:
571 return -ENODEV;
572 }
573
574 /*
575 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
576 *
577 * Setup I/O
578 *
579 */
580 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
581 unsigned int fir_base, unsigned int sir_base,
582 u8 dma, u8 irq)
583 {
584 unsigned char config, chip_dma, chip_irq;
585
586 register_bank(fir_base, 3);
587 config = inb(fir_base + IRCC_INTERFACE);
588 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
589 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
590
591 self->io.fir_base = fir_base;
592 self->io.sir_base = sir_base;
593 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
594 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
595 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
596 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
597
598 if (irq < 255) {
599 if (irq != chip_irq)
600 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
601 driver_name, chip_irq, irq);
602 self->io.irq = irq;
603 } else
604 self->io.irq = chip_irq;
605
606 if (dma < 255) {
607 if (dma != chip_dma)
608 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
609 driver_name, chip_dma, dma);
610 self->io.dma = dma;
611 } else
612 self->io.dma = chip_dma;
613
614 }
615
616 /*
617 * Function smsc_ircc_setup_qos(self)
618 *
619 * Setup qos
620 *
621 */
622 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
623 {
624 /* Initialize QoS for this device */
625 irda_init_max_qos_capabilies(&self->qos);
626
627 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
628 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
629
630 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
631 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
632 irda_qos_bits_to_value(&self->qos);
633 }
634
635 /*
636 * Function smsc_ircc_init_chip(self)
637 *
638 * Init chip
639 *
640 */
641 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
642 {
643 int iobase = self->io.fir_base;
644
645 register_bank(iobase, 0);
646 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
647 outb(0x00, iobase + IRCC_MASTER);
648
649 register_bank(iobase, 1);
650 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
651 iobase + IRCC_SCE_CFGA);
652
653 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
654 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
655 iobase + IRCC_SCE_CFGB);
656 #else
657 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
658 iobase + IRCC_SCE_CFGB);
659 #endif
660 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
661 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
662
663 register_bank(iobase, 4);
664 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
665
666 register_bank(iobase, 0);
667 outb(0, iobase + IRCC_LCR_A);
668
669 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
670
671 /* Power on device */
672 outb(0x00, iobase + IRCC_MASTER);
673 }
674
675 /*
676 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
677 *
678 * Process IOCTL commands for this device
679 *
680 */
681 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
682 {
683 struct if_irda_req *irq = (struct if_irda_req *) rq;
684 struct smsc_ircc_cb *self;
685 unsigned long flags;
686 int ret = 0;
687
688 IRDA_ASSERT(dev != NULL, return -1;);
689
690 self = netdev_priv(dev);
691
692 IRDA_ASSERT(self != NULL, return -1;);
693
694 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
695
696 switch (cmd) {
697 case SIOCSBANDWIDTH: /* Set bandwidth */
698 if (!capable(CAP_NET_ADMIN))
699 ret = -EPERM;
700 else {
701 /* Make sure we are the only one touching
702 * self->io.speed and the hardware - Jean II */
703 spin_lock_irqsave(&self->lock, flags);
704 smsc_ircc_change_speed(self, irq->ifr_baudrate);
705 spin_unlock_irqrestore(&self->lock, flags);
706 }
707 break;
708 case SIOCSMEDIABUSY: /* Set media busy */
709 if (!capable(CAP_NET_ADMIN)) {
710 ret = -EPERM;
711 break;
712 }
713
714 irda_device_set_media_busy(self->netdev, TRUE);
715 break;
716 case SIOCGRECEIVING: /* Check if we are receiving right now */
717 irq->ifr_receiving = smsc_ircc_is_receiving(self);
718 break;
719 #if 0
720 case SIOCSDTRRTS:
721 if (!capable(CAP_NET_ADMIN)) {
722 ret = -EPERM;
723 break;
724 }
725 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
726 break;
727 #endif
728 default:
729 ret = -EOPNOTSUPP;
730 }
731
732 return ret;
733 }
734
735 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
736 {
737 struct smsc_ircc_cb *self = netdev_priv(dev);
738
739 return &self->stats;
740 }
741
742 #if SMSC_IRCC2_C_NET_TIMEOUT
743 /*
744 * Function smsc_ircc_timeout (struct net_device *dev)
745 *
746 * The networking timeout management.
747 *
748 */
749
750 static void smsc_ircc_timeout(struct net_device *dev)
751 {
752 struct smsc_ircc_cb *self = netdev_priv(dev);
753 unsigned long flags;
754
755 IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
756 dev->name, self->io.speed);
757 spin_lock_irqsave(&self->lock, flags);
758 smsc_ircc_sir_start(self);
759 smsc_ircc_change_speed(self, self->io.speed);
760 dev->trans_start = jiffies;
761 netif_wake_queue(dev);
762 spin_unlock_irqrestore(&self->lock, flags);
763 }
764 #endif
765
766 /*
767 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
768 *
769 * Transmits the current frame until FIFO is full, then
770 * waits until the next transmit interrupt, and continues until the
771 * frame is transmitted.
772 */
773 int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
774 {
775 struct smsc_ircc_cb *self;
776 unsigned long flags;
777 s32 speed;
778
779 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
780
781 IRDA_ASSERT(dev != NULL, return 0;);
782
783 self = netdev_priv(dev);
784 IRDA_ASSERT(self != NULL, return 0;);
785
786 netif_stop_queue(dev);
787
788 /* Make sure test of self->io.speed & speed change are atomic */
789 spin_lock_irqsave(&self->lock, flags);
790
791 /* Check if we need to change the speed */
792 speed = irda_get_next_speed(skb);
793 if (speed != self->io.speed && speed != -1) {
794 /* Check for empty frame */
795 if (!skb->len) {
796 /*
797 * We send frames one by one in SIR mode (no
798 * pipelining), so at this point, if we were sending
799 * a previous frame, we just received the interrupt
800 * telling us it is finished (UART_IIR_THRI).
801 * Therefore, waiting for the transmitter to really
802 * finish draining the fifo won't take too long.
803 * And the interrupt handler is not expected to run.
804 * - Jean II */
805 smsc_ircc_sir_wait_hw_transmitter_finish(self);
806 smsc_ircc_change_speed(self, speed);
807 spin_unlock_irqrestore(&self->lock, flags);
808 dev_kfree_skb(skb);
809 return 0;
810 }
811 self->new_speed = speed;
812 }
813
814 /* Init tx buffer */
815 self->tx_buff.data = self->tx_buff.head;
816
817 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
818 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
819 self->tx_buff.truesize);
820
821 self->stats.tx_bytes += self->tx_buff.len;
822
823 /* Turn on transmit finished interrupt. Will fire immediately! */
824 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
825
826 spin_unlock_irqrestore(&self->lock, flags);
827
828 dev_kfree_skb(skb);
829
830 return 0;
831 }
832
833 /*
834 * Function smsc_ircc_set_fir_speed (self, baud)
835 *
836 * Change the speed of the device
837 *
838 */
839 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
840 {
841 int fir_base, ir_mode, ctrl, fast;
842
843 IRDA_ASSERT(self != NULL, return;);
844 fir_base = self->io.fir_base;
845
846 self->io.speed = speed;
847
848 switch (speed) {
849 default:
850 case 576000:
851 ir_mode = IRCC_CFGA_IRDA_HDLC;
852 ctrl = IRCC_CRC;
853 fast = 0;
854 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
855 break;
856 case 1152000:
857 ir_mode = IRCC_CFGA_IRDA_HDLC;
858 ctrl = IRCC_1152 | IRCC_CRC;
859 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
860 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
861 __FUNCTION__);
862 break;
863 case 4000000:
864 ir_mode = IRCC_CFGA_IRDA_4PPM;
865 ctrl = IRCC_CRC;
866 fast = IRCC_LCR_A_FAST;
867 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
868 __FUNCTION__);
869 break;
870 }
871 #if 0
872 Now in tranceiver!
873 /* This causes an interrupt */
874 register_bank(fir_base, 0);
875 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
876 #endif
877
878 register_bank(fir_base, 1);
879 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
880
881 register_bank(fir_base, 4);
882 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
883 }
884
885 /*
886 * Function smsc_ircc_fir_start(self)
887 *
888 * Change the speed of the device
889 *
890 */
891 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
892 {
893 struct net_device *dev;
894 int fir_base;
895
896 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
897
898 IRDA_ASSERT(self != NULL, return;);
899 dev = self->netdev;
900 IRDA_ASSERT(dev != NULL, return;);
901
902 fir_base = self->io.fir_base;
903
904 /* Reset everything */
905
906 /* Install FIR transmit handler */
907 dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
908
909 /* Clear FIFO */
910 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
911
912 /* Enable interrupt */
913 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
914
915 register_bank(fir_base, 1);
916
917 /* Select the TX/RX interface */
918 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
919 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
920 fir_base + IRCC_SCE_CFGB);
921 #else
922 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
923 fir_base + IRCC_SCE_CFGB);
924 #endif
925 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
926
927 /* Enable SCE interrupts */
928 outb(0, fir_base + IRCC_MASTER);
929 register_bank(fir_base, 0);
930 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
931 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
932 }
933
934 /*
935 * Function smsc_ircc_fir_stop(self, baud)
936 *
937 * Change the speed of the device
938 *
939 */
940 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
941 {
942 int fir_base;
943
944 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
945
946 IRDA_ASSERT(self != NULL, return;);
947
948 fir_base = self->io.fir_base;
949 register_bank(fir_base, 0);
950 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
951 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
952 }
953
954
955 /*
956 * Function smsc_ircc_change_speed(self, baud)
957 *
958 * Change the speed of the device
959 *
960 * This function *must* be called with spinlock held, because it may
961 * be called from the irq handler. - Jean II
962 */
963 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
964 {
965 struct net_device *dev;
966 int last_speed_was_sir;
967
968 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);
969
970 IRDA_ASSERT(self != NULL, return;);
971 dev = self->netdev;
972
973 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
974
975 #if 0
976 /* Temp Hack */
977 speed= 1152000;
978 self->io.speed = speed;
979 last_speed_was_sir = 0;
980 smsc_ircc_fir_start(self);
981 #endif
982
983 if (self->io.speed == 0)
984 smsc_ircc_sir_start(self);
985
986 #if 0
987 if (!last_speed_was_sir) speed = self->io.speed;
988 #endif
989
990 if (self->io.speed != speed)
991 smsc_ircc_set_transceiver_for_speed(self, speed);
992
993 self->io.speed = speed;
994
995 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
996 if (!last_speed_was_sir) {
997 smsc_ircc_fir_stop(self);
998 smsc_ircc_sir_start(self);
999 }
1000 smsc_ircc_set_sir_speed(self, speed);
1001 } else {
1002 if (last_speed_was_sir) {
1003 #if SMSC_IRCC2_C_SIR_STOP
1004 smsc_ircc_sir_stop(self);
1005 #endif
1006 smsc_ircc_fir_start(self);
1007 }
1008 smsc_ircc_set_fir_speed(self, speed);
1009
1010 #if 0
1011 self->tx_buff.len = 10;
1012 self->tx_buff.data = self->tx_buff.head;
1013
1014 smsc_ircc_dma_xmit(self, 4000);
1015 #endif
1016 /* Be ready for incoming frames */
1017 smsc_ircc_dma_receive(self);
1018 }
1019
1020 netif_wake_queue(dev);
1021 }
1022
1023 /*
1024 * Function smsc_ircc_set_sir_speed (self, speed)
1025 *
1026 * Set speed of IrDA port to specified baudrate
1027 *
1028 */
1029 void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1030 {
1031 int iobase;
1032 int fcr; /* FIFO control reg */
1033 int lcr; /* Line control reg */
1034 int divisor;
1035
1036 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __FUNCTION__, speed);
1037
1038 IRDA_ASSERT(self != NULL, return;);
1039 iobase = self->io.sir_base;
1040
1041 /* Update accounting for new speed */
1042 self->io.speed = speed;
1043
1044 /* Turn off interrupts */
1045 outb(0, iobase + UART_IER);
1046
1047 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1048
1049 fcr = UART_FCR_ENABLE_FIFO;
1050
1051 /*
1052 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1053 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1054 * about this timeout since it will always be fast enough.
1055 */
1056 fcr |= self->io.speed < 38400 ?
1057 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1058
1059 /* IrDA ports use 8N1 */
1060 lcr = UART_LCR_WLEN8;
1061
1062 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1063 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1064 outb(divisor >> 8, iobase + UART_DLM);
1065 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1066 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1067
1068 /* Turn on interrups */
1069 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1070
1071 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __FUNCTION__, speed);
1072 }
1073
1074
1075 /*
1076 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1077 *
1078 * Transmit the frame!
1079 *
1080 */
1081 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1082 {
1083 struct smsc_ircc_cb *self;
1084 unsigned long flags;
1085 s32 speed;
1086 int mtt;
1087
1088 IRDA_ASSERT(dev != NULL, return 0;);
1089 self = netdev_priv(dev);
1090 IRDA_ASSERT(self != NULL, return 0;);
1091
1092 netif_stop_queue(dev);
1093
1094 /* Make sure test of self->io.speed & speed change are atomic */
1095 spin_lock_irqsave(&self->lock, flags);
1096
1097 /* Check if we need to change the speed after this frame */
1098 speed = irda_get_next_speed(skb);
1099 if (speed != self->io.speed && speed != -1) {
1100 /* Check for empty frame */
1101 if (!skb->len) {
1102 /* Note : you should make sure that speed changes
1103 * are not going to corrupt any outgoing frame.
1104 * Look at nsc-ircc for the gory details - Jean II */
1105 smsc_ircc_change_speed(self, speed);
1106 spin_unlock_irqrestore(&self->lock, flags);
1107 dev_kfree_skb(skb);
1108 return 0;
1109 }
1110
1111 self->new_speed = speed;
1112 }
1113
1114 memcpy(self->tx_buff.head, skb->data, skb->len);
1115
1116 self->tx_buff.len = skb->len;
1117 self->tx_buff.data = self->tx_buff.head;
1118
1119 mtt = irda_get_mtt(skb);
1120 if (mtt) {
1121 int bofs;
1122
1123 /*
1124 * Compute how many BOFs (STA or PA's) we need to waste the
1125 * min turn time given the speed of the link.
1126 */
1127 bofs = mtt * (self->io.speed / 1000) / 8000;
1128 if (bofs > 4095)
1129 bofs = 4095;
1130
1131 smsc_ircc_dma_xmit(self, bofs);
1132 } else {
1133 /* Transmit frame */
1134 smsc_ircc_dma_xmit(self, 0);
1135 }
1136
1137 spin_unlock_irqrestore(&self->lock, flags);
1138 dev_kfree_skb(skb);
1139
1140 return 0;
1141 }
1142
1143 /*
1144 * Function smsc_ircc_dma_xmit (self, bofs)
1145 *
1146 * Transmit data using DMA
1147 *
1148 */
1149 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1150 {
1151 int iobase = self->io.fir_base;
1152 u8 ctrl;
1153
1154 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1155 #if 1
1156 /* Disable Rx */
1157 register_bank(iobase, 0);
1158 outb(0x00, iobase + IRCC_LCR_B);
1159 #endif
1160 register_bank(iobase, 1);
1161 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1162 iobase + IRCC_SCE_CFGB);
1163
1164 self->io.direction = IO_XMIT;
1165
1166 /* Set BOF additional count for generating the min turn time */
1167 register_bank(iobase, 4);
1168 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1169 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1170 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1171
1172 /* Set max Tx frame size */
1173 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1174 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1175
1176 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1177
1178 /* Enable burst mode chip Tx DMA */
1179 register_bank(iobase, 1);
1180 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1181 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1182
1183 /* Setup DMA controller (must be done after enabling chip DMA) */
1184 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1185 DMA_TX_MODE);
1186
1187 /* Enable interrupt */
1188
1189 register_bank(iobase, 0);
1190 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1191 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1192
1193 /* Enable transmit */
1194 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1195 }
1196
1197 /*
1198 * Function smsc_ircc_dma_xmit_complete (self)
1199 *
1200 * The transfer of a frame in finished. This function will only be called
1201 * by the interrupt handler
1202 *
1203 */
1204 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1205 {
1206 int iobase = self->io.fir_base;
1207
1208 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1209 #if 0
1210 /* Disable Tx */
1211 register_bank(iobase, 0);
1212 outb(0x00, iobase + IRCC_LCR_B);
1213 #endif
1214 register_bank(iobase, 1);
1215 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1216 iobase + IRCC_SCE_CFGB);
1217
1218 /* Check for underrun! */
1219 register_bank(iobase, 0);
1220 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1221 self->stats.tx_errors++;
1222 self->stats.tx_fifo_errors++;
1223
1224 /* Reset error condition */
1225 register_bank(iobase, 0);
1226 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1227 outb(0x00, iobase + IRCC_MASTER);
1228 } else {
1229 self->stats.tx_packets++;
1230 self->stats.tx_bytes += self->tx_buff.len;
1231 }
1232
1233 /* Check if it's time to change the speed */
1234 if (self->new_speed) {
1235 smsc_ircc_change_speed(self, self->new_speed);
1236 self->new_speed = 0;
1237 }
1238
1239 netif_wake_queue(self->netdev);
1240 }
1241
1242 /*
1243 * Function smsc_ircc_dma_receive(self)
1244 *
1245 * Get ready for receiving a frame. The device will initiate a DMA
1246 * if it starts to receive a frame.
1247 *
1248 */
1249 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1250 {
1251 int iobase = self->io.fir_base;
1252 #if 0
1253 /* Turn off chip DMA */
1254 register_bank(iobase, 1);
1255 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1256 iobase + IRCC_SCE_CFGB);
1257 #endif
1258
1259 /* Disable Tx */
1260 register_bank(iobase, 0);
1261 outb(0x00, iobase + IRCC_LCR_B);
1262
1263 /* Turn off chip DMA */
1264 register_bank(iobase, 1);
1265 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1266 iobase + IRCC_SCE_CFGB);
1267
1268 self->io.direction = IO_RECV;
1269 self->rx_buff.data = self->rx_buff.head;
1270
1271 /* Set max Rx frame size */
1272 register_bank(iobase, 4);
1273 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1274 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1275
1276 /* Setup DMA controller */
1277 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1278 DMA_RX_MODE);
1279
1280 /* Enable burst mode chip Rx DMA */
1281 register_bank(iobase, 1);
1282 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1283 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1284
1285 /* Enable interrupt */
1286 register_bank(iobase, 0);
1287 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1288 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1289
1290 /* Enable receiver */
1291 register_bank(iobase, 0);
1292 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1293 iobase + IRCC_LCR_B);
1294
1295 return 0;
1296 }
1297
1298 /*
1299 * Function smsc_ircc_dma_receive_complete(self)
1300 *
1301 * Finished with receiving frames
1302 *
1303 */
1304 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1305 {
1306 struct sk_buff *skb;
1307 int len, msgcnt, lsr;
1308 int iobase = self->io.fir_base;
1309
1310 register_bank(iobase, 0);
1311
1312 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1313 #if 0
1314 /* Disable Rx */
1315 register_bank(iobase, 0);
1316 outb(0x00, iobase + IRCC_LCR_B);
1317 #endif
1318 register_bank(iobase, 0);
1319 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1320 lsr= inb(iobase + IRCC_LSR);
1321 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1322
1323 IRDA_DEBUG(2, "%s: dma count = %d\n", __FUNCTION__,
1324 get_dma_residue(self->io.dma));
1325
1326 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1327
1328 /* Look for errors */
1329 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1330 self->stats.rx_errors++;
1331 if (lsr & IRCC_LSR_FRAME_ERROR)
1332 self->stats.rx_frame_errors++;
1333 if (lsr & IRCC_LSR_CRC_ERROR)
1334 self->stats.rx_crc_errors++;
1335 if (lsr & IRCC_LSR_SIZE_ERROR)
1336 self->stats.rx_length_errors++;
1337 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1338 self->stats.rx_length_errors++;
1339 return;
1340 }
1341
1342 /* Remove CRC */
1343 len -= self->io.speed < 4000000 ? 2 : 4;
1344
1345 if (len < 2 || len > 2050) {
1346 IRDA_WARNING("%s(), bogus len=%d\n", __FUNCTION__, len);
1347 return;
1348 }
1349 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
1350
1351 skb = dev_alloc_skb(len + 1);
1352 if (!skb) {
1353 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1354 __FUNCTION__);
1355 return;
1356 }
1357 /* Make sure IP header gets aligned */
1358 skb_reserve(skb, 1);
1359
1360 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1361 self->stats.rx_packets++;
1362 self->stats.rx_bytes += len;
1363
1364 skb->dev = self->netdev;
1365 skb->mac.raw = skb->data;
1366 skb->protocol = htons(ETH_P_IRDA);
1367 netif_rx(skb);
1368 }
1369
1370 /*
1371 * Function smsc_ircc_sir_receive (self)
1372 *
1373 * Receive one frame from the infrared port
1374 *
1375 */
1376 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1377 {
1378 int boguscount = 0;
1379 int iobase;
1380
1381 IRDA_ASSERT(self != NULL, return;);
1382
1383 iobase = self->io.sir_base;
1384
1385 /*
1386 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1387 * async_unwrap_char will deliver all found frames
1388 */
1389 do {
1390 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
1391 inb(iobase + UART_RX));
1392
1393 /* Make sure we don't stay here to long */
1394 if (boguscount++ > 32) {
1395 IRDA_DEBUG(2, "%s(), breaking!\n", __FUNCTION__);
1396 break;
1397 }
1398 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1399 }
1400
1401
1402 /*
1403 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1404 *
1405 * An interrupt from the chip has arrived. Time to do some work
1406 *
1407 */
1408 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1409 {
1410 struct net_device *dev = (struct net_device *) dev_id;
1411 struct smsc_ircc_cb *self;
1412 int iobase, iir, lcra, lsr;
1413 irqreturn_t ret = IRQ_NONE;
1414
1415 if (dev == NULL) {
1416 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1417 driver_name, irq);
1418 goto irq_ret;
1419 }
1420
1421 self = netdev_priv(dev);
1422 IRDA_ASSERT(self != NULL, return IRQ_NONE;);
1423
1424 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1425 spin_lock(&self->lock);
1426
1427 /* Check if we should use the SIR interrupt handler */
1428 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1429 ret = smsc_ircc_interrupt_sir(dev);
1430 goto irq_ret_unlock;
1431 }
1432
1433 iobase = self->io.fir_base;
1434
1435 register_bank(iobase, 0);
1436 iir = inb(iobase + IRCC_IIR);
1437 if (iir == 0)
1438 goto irq_ret_unlock;
1439 ret = IRQ_HANDLED;
1440
1441 /* Disable interrupts */
1442 outb(0, iobase + IRCC_IER);
1443 lcra = inb(iobase + IRCC_LCR_A);
1444 lsr = inb(iobase + IRCC_LSR);
1445
1446 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __FUNCTION__, iir);
1447
1448 if (iir & IRCC_IIR_EOM) {
1449 if (self->io.direction == IO_RECV)
1450 smsc_ircc_dma_receive_complete(self);
1451 else
1452 smsc_ircc_dma_xmit_complete(self);
1453
1454 smsc_ircc_dma_receive(self);
1455 }
1456
1457 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1458 /*printk(KERN_WARNING "%s(): Active Frame\n", __FUNCTION__);*/
1459 }
1460
1461 /* Enable interrupts again */
1462
1463 register_bank(iobase, 0);
1464 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1465
1466 irq_ret_unlock:
1467 spin_unlock(&self->lock);
1468 irq_ret:
1469 return ret;
1470 }
1471
1472 /*
1473 * Function irport_interrupt_sir (irq, dev_id, regs)
1474 *
1475 * Interrupt handler for SIR modes
1476 */
1477 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1478 {
1479 struct smsc_ircc_cb *self = netdev_priv(dev);
1480 int boguscount = 0;
1481 int iobase;
1482 int iir, lsr;
1483
1484 /* Already locked comming here in smsc_ircc_interrupt() */
1485 /*spin_lock(&self->lock);*/
1486
1487 iobase = self->io.sir_base;
1488
1489 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1490 if (iir == 0)
1491 return IRQ_NONE;
1492 while (iir) {
1493 /* Clear interrupt */
1494 lsr = inb(iobase + UART_LSR);
1495
1496 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1497 __FUNCTION__, iir, lsr, iobase);
1498
1499 switch (iir) {
1500 case UART_IIR_RLSI:
1501 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
1502 break;
1503 case UART_IIR_RDI:
1504 /* Receive interrupt */
1505 smsc_ircc_sir_receive(self);
1506 break;
1507 case UART_IIR_THRI:
1508 if (lsr & UART_LSR_THRE)
1509 /* Transmitter ready for data */
1510 smsc_ircc_sir_write_wakeup(self);
1511 break;
1512 default:
1513 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1514 __FUNCTION__, iir);
1515 break;
1516 }
1517
1518 /* Make sure we don't stay here to long */
1519 if (boguscount++ > 100)
1520 break;
1521
1522 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1523 }
1524 /*spin_unlock(&self->lock);*/
1525 return IRQ_HANDLED;
1526 }
1527
1528
1529 #if 0 /* unused */
1530 /*
1531 * Function ircc_is_receiving (self)
1532 *
1533 * Return TRUE is we are currently receiving a frame
1534 *
1535 */
1536 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1537 {
1538 int status = FALSE;
1539 /* int iobase; */
1540
1541 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1542
1543 IRDA_ASSERT(self != NULL, return FALSE;);
1544
1545 IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
1546 get_dma_residue(self->io.dma));
1547
1548 status = (self->rx_buff.state != OUTSIDE_FRAME);
1549
1550 return status;
1551 }
1552 #endif /* unused */
1553
1554 static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1555 {
1556 int error;
1557
1558 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1559 self->netdev->name, self->netdev);
1560 if (error)
1561 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1562 __FUNCTION__, self->io.irq, error);
1563
1564 return error;
1565 }
1566
1567 static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1568 {
1569 unsigned long flags;
1570
1571 spin_lock_irqsave(&self->lock, flags);
1572
1573 self->io.speed = 0;
1574 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1575
1576 spin_unlock_irqrestore(&self->lock, flags);
1577 }
1578
1579 static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1580 {
1581 int iobase = self->io.fir_base;
1582 unsigned long flags;
1583
1584 spin_lock_irqsave(&self->lock, flags);
1585
1586 register_bank(iobase, 0);
1587 outb(0, iobase + IRCC_IER);
1588 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1589 outb(0x00, iobase + IRCC_MASTER);
1590
1591 spin_unlock_irqrestore(&self->lock, flags);
1592 }
1593
1594
1595 /*
1596 * Function smsc_ircc_net_open (dev)
1597 *
1598 * Start the device
1599 *
1600 */
1601 static int smsc_ircc_net_open(struct net_device *dev)
1602 {
1603 struct smsc_ircc_cb *self;
1604 char hwname[16];
1605
1606 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1607
1608 IRDA_ASSERT(dev != NULL, return -1;);
1609 self = netdev_priv(dev);
1610 IRDA_ASSERT(self != NULL, return 0;);
1611
1612 if (self->io.suspended) {
1613 IRDA_DEBUG(0, "%s(), device is suspended\n", __FUNCTION__);
1614 return -EAGAIN;
1615 }
1616
1617 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1618 (void *) dev)) {
1619 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1620 __FUNCTION__, self->io.irq);
1621 return -EAGAIN;
1622 }
1623
1624 smsc_ircc_start_interrupts(self);
1625
1626 /* Give self a hardware name */
1627 /* It would be cool to offer the chip revision here - Jean II */
1628 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1629
1630 /*
1631 * Open new IrLAP layer instance, now that everything should be
1632 * initialized properly
1633 */
1634 self->irlap = irlap_open(dev, &self->qos, hwname);
1635
1636 /*
1637 * Always allocate the DMA channel after the IRQ,
1638 * and clean up on failure.
1639 */
1640 if (request_dma(self->io.dma, dev->name)) {
1641 smsc_ircc_net_close(dev);
1642
1643 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1644 __FUNCTION__, self->io.dma);
1645 return -EAGAIN;
1646 }
1647
1648 netif_start_queue(dev);
1649
1650 return 0;
1651 }
1652
1653 /*
1654 * Function smsc_ircc_net_close (dev)
1655 *
1656 * Stop the device
1657 *
1658 */
1659 static int smsc_ircc_net_close(struct net_device *dev)
1660 {
1661 struct smsc_ircc_cb *self;
1662
1663 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1664
1665 IRDA_ASSERT(dev != NULL, return -1;);
1666 self = netdev_priv(dev);
1667 IRDA_ASSERT(self != NULL, return 0;);
1668
1669 /* Stop device */
1670 netif_stop_queue(dev);
1671
1672 /* Stop and remove instance of IrLAP */
1673 if (self->irlap)
1674 irlap_close(self->irlap);
1675 self->irlap = NULL;
1676
1677 smsc_ircc_stop_interrupts(self);
1678
1679 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1680 if (!self->io.suspended)
1681 free_irq(self->io.irq, dev);
1682
1683 disable_dma(self->io.dma);
1684 free_dma(self->io.dma);
1685
1686 return 0;
1687 }
1688
1689 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
1690 {
1691 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1692
1693 if (!self->io.suspended) {
1694 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1695
1696 rtnl_lock();
1697 if (netif_running(self->netdev)) {
1698 netif_device_detach(self->netdev);
1699 smsc_ircc_stop_interrupts(self);
1700 free_irq(self->io.irq, self->netdev);
1701 disable_dma(self->io.dma);
1702 }
1703 self->io.suspended = 1;
1704 rtnl_unlock();
1705 }
1706
1707 return 0;
1708 }
1709
1710 static int smsc_ircc_resume(struct platform_device *dev)
1711 {
1712 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1713
1714 if (self->io.suspended) {
1715 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1716
1717 rtnl_lock();
1718 smsc_ircc_init_chip(self);
1719 if (netif_running(self->netdev)) {
1720 if (smsc_ircc_request_irq(self)) {
1721 /*
1722 * Don't fail resume process, just kill this
1723 * network interface
1724 */
1725 unregister_netdevice(self->netdev);
1726 } else {
1727 enable_dma(self->io.dma);
1728 smsc_ircc_start_interrupts(self);
1729 netif_device_attach(self->netdev);
1730 }
1731 }
1732 self->io.suspended = 0;
1733 rtnl_unlock();
1734 }
1735 return 0;
1736 }
1737
1738 /*
1739 * Function smsc_ircc_close (self)
1740 *
1741 * Close driver instance
1742 *
1743 */
1744 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1745 {
1746 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1747
1748 IRDA_ASSERT(self != NULL, return -1;);
1749
1750 platform_device_unregister(self->pldev);
1751
1752 /* Remove netdevice */
1753 unregister_netdev(self->netdev);
1754
1755 smsc_ircc_stop_interrupts(self);
1756
1757 /* Release the PORTS that this driver is using */
1758 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1759 self->io.fir_base);
1760
1761 release_region(self->io.fir_base, self->io.fir_ext);
1762
1763 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1764 self->io.sir_base);
1765
1766 release_region(self->io.sir_base, self->io.sir_ext);
1767
1768 if (self->tx_buff.head)
1769 dma_free_coherent(NULL, self->tx_buff.truesize,
1770 self->tx_buff.head, self->tx_buff_dma);
1771
1772 if (self->rx_buff.head)
1773 dma_free_coherent(NULL, self->rx_buff.truesize,
1774 self->rx_buff.head, self->rx_buff_dma);
1775
1776 free_netdev(self->netdev);
1777
1778 return 0;
1779 }
1780
1781 static void __exit smsc_ircc_cleanup(void)
1782 {
1783 int i;
1784
1785 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1786
1787 for (i = 0; i < 2; i++) {
1788 if (dev_self[i])
1789 smsc_ircc_close(dev_self[i]);
1790 }
1791
1792 platform_driver_unregister(&smsc_ircc_driver);
1793 }
1794
1795 /*
1796 * Start SIR operations
1797 *
1798 * This function *must* be called with spinlock held, because it may
1799 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1800 */
1801 void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1802 {
1803 struct net_device *dev;
1804 int fir_base, sir_base;
1805
1806 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1807
1808 IRDA_ASSERT(self != NULL, return;);
1809 dev = self->netdev;
1810 IRDA_ASSERT(dev != NULL, return;);
1811 dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
1812
1813 fir_base = self->io.fir_base;
1814 sir_base = self->io.sir_base;
1815
1816 /* Reset everything */
1817 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1818
1819 #if SMSC_IRCC2_C_SIR_STOP
1820 /*smsc_ircc_sir_stop(self);*/
1821 #endif
1822
1823 register_bank(fir_base, 1);
1824 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1825
1826 /* Initialize UART */
1827 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1828 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1829
1830 /* Turn on interrups */
1831 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1832
1833 IRDA_DEBUG(3, "%s() - exit\n", __FUNCTION__);
1834
1835 outb(0x00, fir_base + IRCC_MASTER);
1836 }
1837
1838 #if SMSC_IRCC2_C_SIR_STOP
1839 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1840 {
1841 int iobase;
1842
1843 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1844 iobase = self->io.sir_base;
1845
1846 /* Reset UART */
1847 outb(0, iobase + UART_MCR);
1848
1849 /* Turn off interrupts */
1850 outb(0, iobase + UART_IER);
1851 }
1852 #endif
1853
1854 /*
1855 * Function smsc_sir_write_wakeup (self)
1856 *
1857 * Called by the SIR interrupt handler when there's room for more data.
1858 * If we have more packets to send, we send them here.
1859 *
1860 */
1861 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1862 {
1863 int actual = 0;
1864 int iobase;
1865 int fcr;
1866
1867 IRDA_ASSERT(self != NULL, return;);
1868
1869 IRDA_DEBUG(4, "%s\n", __FUNCTION__);
1870
1871 iobase = self->io.sir_base;
1872
1873 /* Finished with frame? */
1874 if (self->tx_buff.len > 0) {
1875 /* Write data left in transmit buffer */
1876 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1877 self->tx_buff.data, self->tx_buff.len);
1878 self->tx_buff.data += actual;
1879 self->tx_buff.len -= actual;
1880 } else {
1881
1882 /*if (self->tx_buff.len ==0) {*/
1883
1884 /*
1885 * Now serial buffer is almost free & we can start
1886 * transmission of another packet. But first we must check
1887 * if we need to change the speed of the hardware
1888 */
1889 if (self->new_speed) {
1890 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1891 __FUNCTION__, self->new_speed);
1892 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1893 smsc_ircc_change_speed(self, self->new_speed);
1894 self->new_speed = 0;
1895 } else {
1896 /* Tell network layer that we want more frames */
1897 netif_wake_queue(self->netdev);
1898 }
1899 self->stats.tx_packets++;
1900
1901 if (self->io.speed <= 115200) {
1902 /*
1903 * Reset Rx FIFO to make sure that all reflected transmit data
1904 * is discarded. This is needed for half duplex operation
1905 */
1906 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
1907 fcr |= self->io.speed < 38400 ?
1908 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1909
1910 outb(fcr, iobase + UART_FCR);
1911
1912 /* Turn on receive interrupts */
1913 outb(UART_IER_RDI, iobase + UART_IER);
1914 }
1915 }
1916 }
1917
1918 /*
1919 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
1920 *
1921 * Fill Tx FIFO with transmit data
1922 *
1923 */
1924 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1925 {
1926 int actual = 0;
1927
1928 /* Tx FIFO should be empty! */
1929 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
1930 IRDA_WARNING("%s(), failed, fifo not empty!\n", __FUNCTION__);
1931 return 0;
1932 }
1933
1934 /* Fill FIFO with current frame */
1935 while (fifo_size-- > 0 && actual < len) {
1936 /* Transmit next byte */
1937 outb(buf[actual], iobase + UART_TX);
1938 actual++;
1939 }
1940 return actual;
1941 }
1942
1943 /*
1944 * Function smsc_ircc_is_receiving (self)
1945 *
1946 * Returns true is we are currently receiving data
1947 *
1948 */
1949 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
1950 {
1951 return (self->rx_buff.state != OUTSIDE_FRAME);
1952 }
1953
1954
1955 /*
1956 * Function smsc_ircc_probe_transceiver(self)
1957 *
1958 * Tries to find the used Transceiver
1959 *
1960 */
1961 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
1962 {
1963 unsigned int i;
1964
1965 IRDA_ASSERT(self != NULL, return;);
1966
1967 for (i = 0; smsc_transceivers[i].name != NULL; i++)
1968 if (smsc_transceivers[i].probe(self->io.fir_base)) {
1969 IRDA_MESSAGE(" %s transceiver found\n",
1970 smsc_transceivers[i].name);
1971 self->transceiver= i + 1;
1972 return;
1973 }
1974
1975 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
1976 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
1977
1978 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
1979 }
1980
1981
1982 /*
1983 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
1984 *
1985 * Set the transceiver according to the speed
1986 *
1987 */
1988 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
1989 {
1990 unsigned int trx;
1991
1992 trx = self->transceiver;
1993 if (trx > 0)
1994 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
1995 }
1996
1997 /*
1998 * Function smsc_ircc_wait_hw_transmitter_finish ()
1999 *
2000 * Wait for the real end of HW transmission
2001 *
2002 * The UART is a strict FIFO, and we get called only when we have finished
2003 * pushing data to the FIFO, so the maximum amount of time we must wait
2004 * is only for the FIFO to drain out.
2005 *
2006 * We use a simple calibrated loop. We may need to adjust the loop
2007 * delay (udelay) to balance I/O traffic and latency. And we also need to
2008 * adjust the maximum timeout.
2009 * It would probably be better to wait for the proper interrupt,
2010 * but it doesn't seem to be available.
2011 *
2012 * We can't use jiffies or kernel timers because :
2013 * 1) We are called from the interrupt handler, which disable softirqs,
2014 * so jiffies won't be increased
2015 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2016 * want to wait that long to detect stuck hardware.
2017 * Jean II
2018 */
2019
2020 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2021 {
2022 int iobase = self->io.sir_base;
2023 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2024
2025 /* Calibrated busy loop */
2026 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2027 udelay(1);
2028
2029 if (count == 0)
2030 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__);
2031 }
2032
2033
2034 /* PROBING
2035 *
2036 *
2037 */
2038
2039 static int __init smsc_ircc_look_for_chips(void)
2040 {
2041 struct smsc_chip_address *address;
2042 char *type;
2043 unsigned int cfg_base, found;
2044
2045 found = 0;
2046 address = possible_addresses;
2047
2048 while (address->cfg_base) {
2049 cfg_base = address->cfg_base;
2050
2051 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __FUNCTION__, cfg_base, address->type);*/
2052
2053 if (address->type & SMSCSIO_TYPE_FDC) {
2054 type = "FDC";
2055 if (address->type & SMSCSIO_TYPE_FLAT)
2056 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2057 found++;
2058
2059 if (address->type & SMSCSIO_TYPE_PAGED)
2060 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2061 found++;
2062 }
2063 if (address->type & SMSCSIO_TYPE_LPC) {
2064 type = "LPC";
2065 if (address->type & SMSCSIO_TYPE_FLAT)
2066 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2067 found++;
2068
2069 if (address->type & SMSCSIO_TYPE_PAGED)
2070 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2071 found++;
2072 }
2073 address++;
2074 }
2075 return found;
2076 }
2077
2078 /*
2079 * Function smsc_superio_flat (chip, base, type)
2080 *
2081 * Try to get configuration of a smc SuperIO chip with flat register model
2082 *
2083 */
2084 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2085 {
2086 unsigned short firbase, sirbase;
2087 u8 mode, dma, irq;
2088 int ret = -ENODEV;
2089
2090 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2091
2092 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2093 return ret;
2094
2095 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2096 mode = inb(cfgbase + 1);
2097
2098 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __FUNCTION__, mode);*/
2099
2100 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2101 IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
2102
2103 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2104 sirbase = inb(cfgbase + 1) << 2;
2105
2106 /* FIR iobase */
2107 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2108 firbase = inb(cfgbase + 1) << 3;
2109
2110 /* DMA */
2111 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2112 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2113
2114 /* IRQ */
2115 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2116 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2117
2118 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __FUNCTION__, firbase, sirbase, dma, irq, mode);
2119
2120 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2121 ret = 0;
2122
2123 /* Exit configuration */
2124 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2125
2126 return ret;
2127 }
2128
2129 /*
2130 * Function smsc_superio_paged (chip, base, type)
2131 *
2132 * Try to get configuration of a smc SuperIO chip with paged register model
2133 *
2134 */
2135 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2136 {
2137 unsigned short fir_io, sir_io;
2138 int ret = -ENODEV;
2139
2140 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2141
2142 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2143 return ret;
2144
2145 /* Select logical device (UART2) */
2146 outb(0x07, cfg_base);
2147 outb(0x05, cfg_base + 1);
2148
2149 /* SIR iobase */
2150 outb(0x60, cfg_base);
2151 sir_io = inb(cfg_base + 1) << 8;
2152 outb(0x61, cfg_base);
2153 sir_io |= inb(cfg_base + 1);
2154
2155 /* Read FIR base */
2156 outb(0x62, cfg_base);
2157 fir_io = inb(cfg_base + 1) << 8;
2158 outb(0x63, cfg_base);
2159 fir_io |= inb(cfg_base + 1);
2160 outb(0x2b, cfg_base); /* ??? */
2161
2162 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2163 ret = 0;
2164
2165 /* Exit configuration */
2166 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2167
2168 return ret;
2169 }
2170
2171
2172 static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2173 {
2174 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2175
2176 outb(reg, cfg_base);
2177 return inb(cfg_base) != reg ? -1 : 0;
2178 }
2179
2180 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2181 {
2182 u8 devid, xdevid, rev;
2183
2184 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2185
2186 /* Leave configuration */
2187
2188 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2189
2190 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2191 return NULL;
2192
2193 outb(reg, cfg_base);
2194
2195 xdevid = inb(cfg_base + 1);
2196
2197 /* Enter configuration */
2198
2199 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2200
2201 #if 0
2202 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2203 return NULL;
2204 #endif
2205
2206 /* probe device ID */
2207
2208 if (smsc_access(cfg_base, reg))
2209 return NULL;
2210
2211 devid = inb(cfg_base + 1);
2212
2213 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2214 return NULL;
2215
2216 /* probe revision ID */
2217
2218 if (smsc_access(cfg_base, reg + 1))
2219 return NULL;
2220
2221 rev = inb(cfg_base + 1);
2222
2223 if (rev >= 128) /* i think this will make no sense */
2224 return NULL;
2225
2226 if (devid == xdevid) /* protection against false positives */
2227 return NULL;
2228
2229 /* Check for expected device ID; are there others? */
2230
2231 while (chip->devid != devid) {
2232
2233 chip++;
2234
2235 if (chip->name == NULL)
2236 return NULL;
2237 }
2238
2239 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2240 devid, rev, cfg_base, type, chip->name);
2241
2242 if (chip->rev > rev) {
2243 IRDA_MESSAGE("Revision higher than expected\n");
2244 return NULL;
2245 }
2246
2247 if (chip->flags & NoIRDA)
2248 IRDA_MESSAGE("chipset does not support IRDA\n");
2249
2250 return chip;
2251 }
2252
2253 static int __init smsc_superio_fdc(unsigned short cfg_base)
2254 {
2255 int ret = -1;
2256
2257 if (!request_region(cfg_base, 2, driver_name)) {
2258 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2259 __FUNCTION__, cfg_base);
2260 } else {
2261 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2262 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2263 ret = 0;
2264
2265 release_region(cfg_base, 2);
2266 }
2267
2268 return ret;
2269 }
2270
2271 static int __init smsc_superio_lpc(unsigned short cfg_base)
2272 {
2273 int ret = -1;
2274
2275 if (!request_region(cfg_base, 2, driver_name)) {
2276 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2277 __FUNCTION__, cfg_base);
2278 } else {
2279 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2280 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2281 ret = 0;
2282
2283 release_region(cfg_base, 2);
2284 }
2285 return ret;
2286 }
2287
2288 /************************************************
2289 *
2290 * Transceivers specific functions
2291 *
2292 ************************************************/
2293
2294
2295 /*
2296 * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2297 *
2298 * Program transceiver through smsc-ircc ATC circuitry
2299 *
2300 */
2301
2302 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2303 {
2304 unsigned long jiffies_now, jiffies_timeout;
2305 u8 val;
2306
2307 jiffies_now = jiffies;
2308 jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2309
2310 /* ATC */
2311 register_bank(fir_base, 4);
2312 outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
2313 fir_base + IRCC_ATC);
2314
2315 while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
2316 !time_after(jiffies, jiffies_timeout))
2317 /* empty */;
2318
2319 if (val)
2320 IRDA_WARNING("%s(): ATC: 0x%02x\n", __FUNCTION__,
2321 inb(fir_base + IRCC_ATC));
2322 }
2323
2324 /*
2325 * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2326 *
2327 * Probe transceiver smsc-ircc ATC circuitry
2328 *
2329 */
2330
2331 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2332 {
2333 return 0;
2334 }
2335
2336 /*
2337 * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2338 *
2339 * Set transceiver
2340 *
2341 */
2342
2343 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2344 {
2345 u8 fast_mode;
2346
2347 switch (speed) {
2348 default:
2349 case 576000 :
2350 fast_mode = 0;
2351 break;
2352 case 1152000 :
2353 case 4000000 :
2354 fast_mode = IRCC_LCR_A_FAST;
2355 break;
2356 }
2357 register_bank(fir_base, 0);
2358 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2359 }
2360
2361 /*
2362 * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2363 *
2364 * Probe transceiver
2365 *
2366 */
2367
2368 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2369 {
2370 return 0;
2371 }
2372
2373 /*
2374 * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2375 *
2376 * Set transceiver
2377 *
2378 */
2379
2380 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
2381 {
2382 u8 fast_mode;
2383
2384 switch (speed) {
2385 default:
2386 case 576000 :
2387 fast_mode = 0;
2388 break;
2389 case 1152000 :
2390 case 4000000 :
2391 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
2392 break;
2393
2394 }
2395 /* This causes an interrupt */
2396 register_bank(fir_base, 0);
2397 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2398 }
2399
2400 /*
2401 * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
2402 *
2403 * Probe transceiver
2404 *
2405 */
2406
2407 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
2408 {
2409 return 0;
2410 }
2411
2412
2413 module_init(smsc_ircc_init);
2414 module_exit(smsc_ircc_cleanup);
Linux with added FPC-III support