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[PATCH] Input: convert hdaps to dynamic input_dev allocation.
[linux-2.6/x86.git] / drivers / net / irda / smsc-ircc2.c
bloba1d207f2fa68e0c26f54267539ab169dfd40bff0
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 device *dev, pm_message_t state);
218 static int smsc_ircc_resume(struct device *dev);
219
220 static struct device_driver smsc_ircc_driver = {
221 .name = SMSC_IRCC2_DRIVER_NAME,
222 .bus = &platform_bus_type,
223 .suspend = smsc_ircc_suspend,
224 .resume = smsc_ircc_resume,
225 };
226
227 /* Transceivers for SMSC-ircc */
228
229 static struct smsc_transceiver smsc_transceivers[] =
230 {
231 { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
232 { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
233 { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
234 { NULL, NULL }
235 };
236 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
237
238 /* SMC SuperIO chipsets definitions */
239
240 #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
241 #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
242 #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
243 #define SIR 0 /* SuperIO Chip has only slow IRDA */
244 #define FIR 4 /* SuperIO Chip has fast IRDA */
245 #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
246
247 static struct smsc_chip __initdata fdc_chips_flat[] =
248 {
249 /* Base address 0x3f0 or 0x370 */
250 { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
251 { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
252 { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
253 { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
254 { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
255 { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
256 { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
257 { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
258 { NULL }
259 };
260
261 static struct smsc_chip __initdata fdc_chips_paged[] =
262 {
263 /* Base address 0x3f0 or 0x370 */
264 { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
265 { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
266 { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
267 { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
268 { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
269 { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
270 { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
271 { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
272 { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
273 { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
274 { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
275 { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
276 { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
277 { NULL }
278 };
279
280 static struct smsc_chip __initdata lpc_chips_flat[] =
281 {
282 /* Base address 0x2E or 0x4E */
283 { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
284 { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
285 { NULL }
286 };
287
288 static struct smsc_chip __initdata lpc_chips_paged[] =
289 {
290 /* Base address 0x2E or 0x4E */
291 { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
292 { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
293 { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
294 { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
295 { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
296 { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
297 { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
298 { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
299 { NULL }
300 };
301
302 #define SMSCSIO_TYPE_FDC 1
303 #define SMSCSIO_TYPE_LPC 2
304 #define SMSCSIO_TYPE_FLAT 4
305 #define SMSCSIO_TYPE_PAGED 8
306
307 static struct smsc_chip_address __initdata possible_addresses[] =
308 {
309 { 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
310 { 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
311 { 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
312 { 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
313 { 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
314 { 0, 0 }
315 };
316
317 /* Globals */
318
319 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
320 static unsigned short dev_count;
321
322 static inline void register_bank(int iobase, int bank)
323 {
324 outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
325 iobase + IRCC_MASTER);
326 }
327
328
329 /*******************************************************************************
330 *
331 *
332 * SMSC-ircc stuff
333 *
334 *
335 *******************************************************************************/
336
337 /*
338 * Function smsc_ircc_init ()
339 *
340 * Initialize chip. Just try to find out how many chips we are dealing with
341 * and where they are
342 */
343 static int __init smsc_ircc_init(void)
344 {
345 int ret;
346
347 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
348
349 ret = driver_register(&smsc_ircc_driver);
350 if (ret) {
351 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
352 return ret;
353 }
354
355 dev_count = 0;
356
357 if (ircc_fir > 0 && ircc_sir > 0) {
358 IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
359 IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
360
361 if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq))
362 ret = -ENODEV;
363 } else {
364 ret = -ENODEV;
365
366 /* try user provided configuration register base address */
367 if (ircc_cfg > 0) {
368 IRDA_MESSAGE(" Overriding configuration address "
369 "0x%04x\n", ircc_cfg);
370 if (!smsc_superio_fdc(ircc_cfg))
371 ret = 0;
372 if (!smsc_superio_lpc(ircc_cfg))
373 ret = 0;
374 }
375
376 if (smsc_ircc_look_for_chips() > 0)
377 ret = 0;
378 }
379
380 if (ret)
381 driver_unregister(&smsc_ircc_driver);
382
383 return ret;
384 }
385
386 /*
387 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
388 *
389 * Try to open driver instance
390 *
391 */
392 static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
393 {
394 struct smsc_ircc_cb *self;
395 struct net_device *dev;
396 int err;
397
398 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
399
400 err = smsc_ircc_present(fir_base, sir_base);
401 if (err)
402 goto err_out;
403
404 err = -ENOMEM;
405 if (dev_count >= ARRAY_SIZE(dev_self)) {
406 IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
407 goto err_out1;
408 }
409
410 /*
411 * Allocate new instance of the driver
412 */
413 dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
414 if (!dev) {
415 IRDA_WARNING("%s() can't allocate net device\n", __FUNCTION__);
416 goto err_out1;
417 }
418
419 SET_MODULE_OWNER(dev);
420
421 dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
422 #if SMSC_IRCC2_C_NET_TIMEOUT
423 dev->tx_timeout = smsc_ircc_timeout;
424 dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
425 #endif
426 dev->open = smsc_ircc_net_open;
427 dev->stop = smsc_ircc_net_close;
428 dev->do_ioctl = smsc_ircc_net_ioctl;
429 dev->get_stats = smsc_ircc_net_get_stats;
430
431 self = netdev_priv(dev);
432 self->netdev = dev;
433
434 /* Make ifconfig display some details */
435 dev->base_addr = self->io.fir_base = fir_base;
436 dev->irq = self->io.irq = irq;
437
438 /* Need to store self somewhere */
439 dev_self[dev_count] = self;
440 spin_lock_init(&self->lock);
441
442 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
443 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
444
445 self->rx_buff.head =
446 dma_alloc_coherent(NULL, self->rx_buff.truesize,
447 &self->rx_buff_dma, GFP_KERNEL);
448 if (self->rx_buff.head == NULL) {
449 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
450 driver_name);
451 goto err_out2;
452 }
453
454 self->tx_buff.head =
455 dma_alloc_coherent(NULL, self->tx_buff.truesize,
456 &self->tx_buff_dma, GFP_KERNEL);
457 if (self->tx_buff.head == NULL) {
458 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
459 driver_name);
460 goto err_out3;
461 }
462
463 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
464 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
465
466 self->rx_buff.in_frame = FALSE;
467 self->rx_buff.state = OUTSIDE_FRAME;
468 self->tx_buff.data = self->tx_buff.head;
469 self->rx_buff.data = self->rx_buff.head;
470
471 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
472 smsc_ircc_setup_qos(self);
473 smsc_ircc_init_chip(self);
474
475 if (ircc_transceiver > 0 &&
476 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
477 self->transceiver = ircc_transceiver;
478 else
479 smsc_ircc_probe_transceiver(self);
480
481 err = register_netdev(self->netdev);
482 if (err) {
483 IRDA_ERROR("%s, Network device registration failed!\n",
484 driver_name);
485 goto err_out4;
486 }
487
488 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
489 dev_count, NULL, 0);
490 if (IS_ERR(self->pldev)) {
491 err = PTR_ERR(self->pldev);
492 goto err_out5;
493 }
494 dev_set_drvdata(&self->pldev->dev, self);
495
496 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
497 dev_count++;
498
499 return 0;
500
501 err_out5:
502 unregister_netdev(self->netdev);
503
504 err_out4:
505 dma_free_coherent(NULL, self->tx_buff.truesize,
506 self->tx_buff.head, self->tx_buff_dma);
507 err_out3:
508 dma_free_coherent(NULL, self->rx_buff.truesize,
509 self->rx_buff.head, self->rx_buff_dma);
510 err_out2:
511 free_netdev(self->netdev);
512 dev_self[dev_count] = NULL;
513 err_out1:
514 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
515 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
516 err_out:
517 return err;
518 }
519
520 /*
521 * Function smsc_ircc_present(fir_base, sir_base)
522 *
523 * Check the smsc-ircc chip presence
524 *
525 */
526 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
527 {
528 unsigned char low, high, chip, config, dma, irq, version;
529
530 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
531 driver_name)) {
532 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
533 __FUNCTION__, fir_base);
534 goto out1;
535 }
536
537 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
538 driver_name)) {
539 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
540 __FUNCTION__, sir_base);
541 goto out2;
542 }
543
544 register_bank(fir_base, 3);
545
546 high = inb(fir_base + IRCC_ID_HIGH);
547 low = inb(fir_base + IRCC_ID_LOW);
548 chip = inb(fir_base + IRCC_CHIP_ID);
549 version = inb(fir_base + IRCC_VERSION);
550 config = inb(fir_base + IRCC_INTERFACE);
551 dma = config & IRCC_INTERFACE_DMA_MASK;
552 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
553
554 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
555 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
556 __FUNCTION__, fir_base);
557 goto out3;
558 }
559 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
560 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
561 chip & 0x0f, version, fir_base, sir_base, dma, irq);
562
563 return 0;
564
565 out3:
566 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
567 out2:
568 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
569 out1:
570 return -ENODEV;
571 }
572
573 /*
574 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
575 *
576 * Setup I/O
577 *
578 */
579 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
580 unsigned int fir_base, unsigned int sir_base,
581 u8 dma, u8 irq)
582 {
583 unsigned char config, chip_dma, chip_irq;
584
585 register_bank(fir_base, 3);
586 config = inb(fir_base + IRCC_INTERFACE);
587 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
588 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
589
590 self->io.fir_base = fir_base;
591 self->io.sir_base = sir_base;
592 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
593 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
594 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
595 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
596
597 if (irq < 255) {
598 if (irq != chip_irq)
599 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
600 driver_name, chip_irq, irq);
601 self->io.irq = irq;
602 } else
603 self->io.irq = chip_irq;
604
605 if (dma < 255) {
606 if (dma != chip_dma)
607 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
608 driver_name, chip_dma, dma);
609 self->io.dma = dma;
610 } else
611 self->io.dma = chip_dma;
612
613 }
614
615 /*
616 * Function smsc_ircc_setup_qos(self)
617 *
618 * Setup qos
619 *
620 */
621 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
622 {
623 /* Initialize QoS for this device */
624 irda_init_max_qos_capabilies(&self->qos);
625
626 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
627 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
628
629 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
630 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
631 irda_qos_bits_to_value(&self->qos);
632 }
633
634 /*
635 * Function smsc_ircc_init_chip(self)
636 *
637 * Init chip
638 *
639 */
640 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
641 {
642 int iobase = self->io.fir_base;
643
644 register_bank(iobase, 0);
645 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
646 outb(0x00, iobase + IRCC_MASTER);
647
648 register_bank(iobase, 1);
649 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
650 iobase + IRCC_SCE_CFGA);
651
652 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
653 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
654 iobase + IRCC_SCE_CFGB);
655 #else
656 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
657 iobase + IRCC_SCE_CFGB);
658 #endif
659 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
660 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
661
662 register_bank(iobase, 4);
663 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
664
665 register_bank(iobase, 0);
666 outb(0, iobase + IRCC_LCR_A);
667
668 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
669
670 /* Power on device */
671 outb(0x00, iobase + IRCC_MASTER);
672 }
673
674 /*
675 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
676 *
677 * Process IOCTL commands for this device
678 *
679 */
680 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
681 {
682 struct if_irda_req *irq = (struct if_irda_req *) rq;
683 struct smsc_ircc_cb *self;
684 unsigned long flags;
685 int ret = 0;
686
687 IRDA_ASSERT(dev != NULL, return -1;);
688
689 self = netdev_priv(dev);
690
691 IRDA_ASSERT(self != NULL, return -1;);
692
693 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
694
695 switch (cmd) {
696 case SIOCSBANDWIDTH: /* Set bandwidth */
697 if (!capable(CAP_NET_ADMIN))
698 ret = -EPERM;
699 else {
700 /* Make sure we are the only one touching
701 * self->io.speed and the hardware - Jean II */
702 spin_lock_irqsave(&self->lock, flags);
703 smsc_ircc_change_speed(self, irq->ifr_baudrate);
704 spin_unlock_irqrestore(&self->lock, flags);
705 }
706 break;
707 case SIOCSMEDIABUSY: /* Set media busy */
708 if (!capable(CAP_NET_ADMIN)) {
709 ret = -EPERM;
710 break;
711 }
712
713 irda_device_set_media_busy(self->netdev, TRUE);
714 break;
715 case SIOCGRECEIVING: /* Check if we are receiving right now */
716 irq->ifr_receiving = smsc_ircc_is_receiving(self);
717 break;
718 #if 0
719 case SIOCSDTRRTS:
720 if (!capable(CAP_NET_ADMIN)) {
721 ret = -EPERM;
722 break;
723 }
724 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
725 break;
726 #endif
727 default:
728 ret = -EOPNOTSUPP;
729 }
730
731 return ret;
732 }
733
734 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
735 {
736 struct smsc_ircc_cb *self = netdev_priv(dev);
737
738 return &self->stats;
739 }
740
741 #if SMSC_IRCC2_C_NET_TIMEOUT
742 /*
743 * Function smsc_ircc_timeout (struct net_device *dev)
744 *
745 * The networking timeout management.
746 *
747 */
748
749 static void smsc_ircc_timeout(struct net_device *dev)
750 {
751 struct smsc_ircc_cb *self = netdev_priv(dev);
752 unsigned long flags;
753
754 IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
755 dev->name, self->io.speed);
756 spin_lock_irqsave(&self->lock, flags);
757 smsc_ircc_sir_start(self);
758 smsc_ircc_change_speed(self, self->io.speed);
759 dev->trans_start = jiffies;
760 netif_wake_queue(dev);
761 spin_unlock_irqrestore(&self->lock, flags);
762 }
763 #endif
764
765 /*
766 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
767 *
768 * Transmits the current frame until FIFO is full, then
769 * waits until the next transmit interrupt, and continues until the
770 * frame is transmitted.
771 */
772 int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
773 {
774 struct smsc_ircc_cb *self;
775 unsigned long flags;
776 s32 speed;
777
778 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
779
780 IRDA_ASSERT(dev != NULL, return 0;);
781
782 self = netdev_priv(dev);
783 IRDA_ASSERT(self != NULL, return 0;);
784
785 netif_stop_queue(dev);
786
787 /* Make sure test of self->io.speed & speed change are atomic */
788 spin_lock_irqsave(&self->lock, flags);
789
790 /* Check if we need to change the speed */
791 speed = irda_get_next_speed(skb);
792 if (speed != self->io.speed && speed != -1) {
793 /* Check for empty frame */
794 if (!skb->len) {
795 /*
796 * We send frames one by one in SIR mode (no
797 * pipelining), so at this point, if we were sending
798 * a previous frame, we just received the interrupt
799 * telling us it is finished (UART_IIR_THRI).
800 * Therefore, waiting for the transmitter to really
801 * finish draining the fifo won't take too long.
802 * And the interrupt handler is not expected to run.
803 * - Jean II */
804 smsc_ircc_sir_wait_hw_transmitter_finish(self);
805 smsc_ircc_change_speed(self, speed);
806 spin_unlock_irqrestore(&self->lock, flags);
807 dev_kfree_skb(skb);
808 return 0;
809 }
810 self->new_speed = speed;
811 }
812
813 /* Init tx buffer */
814 self->tx_buff.data = self->tx_buff.head;
815
816 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
817 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
818 self->tx_buff.truesize);
819
820 self->stats.tx_bytes += self->tx_buff.len;
821
822 /* Turn on transmit finished interrupt. Will fire immediately! */
823 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
824
825 spin_unlock_irqrestore(&self->lock, flags);
826
827 dev_kfree_skb(skb);
828
829 return 0;
830 }
831
832 /*
833 * Function smsc_ircc_set_fir_speed (self, baud)
834 *
835 * Change the speed of the device
836 *
837 */
838 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
839 {
840 int fir_base, ir_mode, ctrl, fast;
841
842 IRDA_ASSERT(self != NULL, return;);
843 fir_base = self->io.fir_base;
844
845 self->io.speed = speed;
846
847 switch (speed) {
848 default:
849 case 576000:
850 ir_mode = IRCC_CFGA_IRDA_HDLC;
851 ctrl = IRCC_CRC;
852 fast = 0;
853 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
854 break;
855 case 1152000:
856 ir_mode = IRCC_CFGA_IRDA_HDLC;
857 ctrl = IRCC_1152 | IRCC_CRC;
858 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
859 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
860 __FUNCTION__);
861 break;
862 case 4000000:
863 ir_mode = IRCC_CFGA_IRDA_4PPM;
864 ctrl = IRCC_CRC;
865 fast = IRCC_LCR_A_FAST;
866 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
867 __FUNCTION__);
868 break;
869 }
870 #if 0
871 Now in tranceiver!
872 /* This causes an interrupt */
873 register_bank(fir_base, 0);
874 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
875 #endif
876
877 register_bank(fir_base, 1);
878 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
879
880 register_bank(fir_base, 4);
881 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
882 }
883
884 /*
885 * Function smsc_ircc_fir_start(self)
886 *
887 * Change the speed of the device
888 *
889 */
890 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
891 {
892 struct net_device *dev;
893 int fir_base;
894
895 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
896
897 IRDA_ASSERT(self != NULL, return;);
898 dev = self->netdev;
899 IRDA_ASSERT(dev != NULL, return;);
900
901 fir_base = self->io.fir_base;
902
903 /* Reset everything */
904
905 /* Install FIR transmit handler */
906 dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
907
908 /* Clear FIFO */
909 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
910
911 /* Enable interrupt */
912 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
913
914 register_bank(fir_base, 1);
915
916 /* Select the TX/RX interface */
917 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
918 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
919 fir_base + IRCC_SCE_CFGB);
920 #else
921 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
922 fir_base + IRCC_SCE_CFGB);
923 #endif
924 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
925
926 /* Enable SCE interrupts */
927 outb(0, fir_base + IRCC_MASTER);
928 register_bank(fir_base, 0);
929 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
930 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
931 }
932
933 /*
934 * Function smsc_ircc_fir_stop(self, baud)
935 *
936 * Change the speed of the device
937 *
938 */
939 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
940 {
941 int fir_base;
942
943 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
944
945 IRDA_ASSERT(self != NULL, return;);
946
947 fir_base = self->io.fir_base;
948 register_bank(fir_base, 0);
949 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
950 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
951 }
952
953
954 /*
955 * Function smsc_ircc_change_speed(self, baud)
956 *
957 * Change the speed of the device
958 *
959 * This function *must* be called with spinlock held, because it may
960 * be called from the irq handler. - Jean II
961 */
962 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
963 {
964 struct net_device *dev;
965 int last_speed_was_sir;
966
967 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);
968
969 IRDA_ASSERT(self != NULL, return;);
970 dev = self->netdev;
971
972 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
973
974 #if 0
975 /* Temp Hack */
976 speed= 1152000;
977 self->io.speed = speed;
978 last_speed_was_sir = 0;
979 smsc_ircc_fir_start(self);
980 #endif
981
982 if (self->io.speed == 0)
983 smsc_ircc_sir_start(self);
984
985 #if 0
986 if (!last_speed_was_sir) speed = self->io.speed;
987 #endif
988
989 if (self->io.speed != speed)
990 smsc_ircc_set_transceiver_for_speed(self, speed);
991
992 self->io.speed = speed;
993
994 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
995 if (!last_speed_was_sir) {
996 smsc_ircc_fir_stop(self);
997 smsc_ircc_sir_start(self);
998 }
999 smsc_ircc_set_sir_speed(self, speed);
1000 } else {
1001 if (last_speed_was_sir) {
1002 #if SMSC_IRCC2_C_SIR_STOP
1003 smsc_ircc_sir_stop(self);
1004 #endif
1005 smsc_ircc_fir_start(self);
1006 }
1007 smsc_ircc_set_fir_speed(self, speed);
1008
1009 #if 0
1010 self->tx_buff.len = 10;
1011 self->tx_buff.data = self->tx_buff.head;
1012
1013 smsc_ircc_dma_xmit(self, 4000);
1014 #endif
1015 /* Be ready for incoming frames */
1016 smsc_ircc_dma_receive(self);
1017 }
1018
1019 netif_wake_queue(dev);
1020 }
1021
1022 /*
1023 * Function smsc_ircc_set_sir_speed (self, speed)
1024 *
1025 * Set speed of IrDA port to specified baudrate
1026 *
1027 */
1028 void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1029 {
1030 int iobase;
1031 int fcr; /* FIFO control reg */
1032 int lcr; /* Line control reg */
1033 int divisor;
1034
1035 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __FUNCTION__, speed);
1036
1037 IRDA_ASSERT(self != NULL, return;);
1038 iobase = self->io.sir_base;
1039
1040 /* Update accounting for new speed */
1041 self->io.speed = speed;
1042
1043 /* Turn off interrupts */
1044 outb(0, iobase + UART_IER);
1045
1046 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1047
1048 fcr = UART_FCR_ENABLE_FIFO;
1049
1050 /*
1051 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1052 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1053 * about this timeout since it will always be fast enough.
1054 */
1055 fcr |= self->io.speed < 38400 ?
1056 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1057
1058 /* IrDA ports use 8N1 */
1059 lcr = UART_LCR_WLEN8;
1060
1061 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1062 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1063 outb(divisor >> 8, iobase + UART_DLM);
1064 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1065 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1066
1067 /* Turn on interrups */
1068 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1069
1070 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __FUNCTION__, speed);
1071 }
1072
1073
1074 /*
1075 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1076 *
1077 * Transmit the frame!
1078 *
1079 */
1080 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1081 {
1082 struct smsc_ircc_cb *self;
1083 unsigned long flags;
1084 s32 speed;
1085 int mtt;
1086
1087 IRDA_ASSERT(dev != NULL, return 0;);
1088 self = netdev_priv(dev);
1089 IRDA_ASSERT(self != NULL, return 0;);
1090
1091 netif_stop_queue(dev);
1092
1093 /* Make sure test of self->io.speed & speed change are atomic */
1094 spin_lock_irqsave(&self->lock, flags);
1095
1096 /* Check if we need to change the speed after this frame */
1097 speed = irda_get_next_speed(skb);
1098 if (speed != self->io.speed && speed != -1) {
1099 /* Check for empty frame */
1100 if (!skb->len) {
1101 /* Note : you should make sure that speed changes
1102 * are not going to corrupt any outgoing frame.
1103 * Look at nsc-ircc for the gory details - Jean II */
1104 smsc_ircc_change_speed(self, speed);
1105 spin_unlock_irqrestore(&self->lock, flags);
1106 dev_kfree_skb(skb);
1107 return 0;
1108 }
1109
1110 self->new_speed = speed;
1111 }
1112
1113 memcpy(self->tx_buff.head, skb->data, skb->len);
1114
1115 self->tx_buff.len = skb->len;
1116 self->tx_buff.data = self->tx_buff.head;
1117
1118 mtt = irda_get_mtt(skb);
1119 if (mtt) {
1120 int bofs;
1121
1122 /*
1123 * Compute how many BOFs (STA or PA's) we need to waste the
1124 * min turn time given the speed of the link.
1125 */
1126 bofs = mtt * (self->io.speed / 1000) / 8000;
1127 if (bofs > 4095)
1128 bofs = 4095;
1129
1130 smsc_ircc_dma_xmit(self, bofs);
1131 } else {
1132 /* Transmit frame */
1133 smsc_ircc_dma_xmit(self, 0);
1134 }
1135
1136 spin_unlock_irqrestore(&self->lock, flags);
1137 dev_kfree_skb(skb);
1138
1139 return 0;
1140 }
1141
1142 /*
1143 * Function smsc_ircc_dma_xmit (self, bofs)
1144 *
1145 * Transmit data using DMA
1146 *
1147 */
1148 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1149 {
1150 int iobase = self->io.fir_base;
1151 u8 ctrl;
1152
1153 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1154 #if 1
1155 /* Disable Rx */
1156 register_bank(iobase, 0);
1157 outb(0x00, iobase + IRCC_LCR_B);
1158 #endif
1159 register_bank(iobase, 1);
1160 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1161 iobase + IRCC_SCE_CFGB);
1162
1163 self->io.direction = IO_XMIT;
1164
1165 /* Set BOF additional count for generating the min turn time */
1166 register_bank(iobase, 4);
1167 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1168 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1169 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1170
1171 /* Set max Tx frame size */
1172 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1173 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1174
1175 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1176
1177 /* Enable burst mode chip Tx DMA */
1178 register_bank(iobase, 1);
1179 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1180 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1181
1182 /* Setup DMA controller (must be done after enabling chip DMA) */
1183 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1184 DMA_TX_MODE);
1185
1186 /* Enable interrupt */
1187
1188 register_bank(iobase, 0);
1189 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1190 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1191
1192 /* Enable transmit */
1193 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1194 }
1195
1196 /*
1197 * Function smsc_ircc_dma_xmit_complete (self)
1198 *
1199 * The transfer of a frame in finished. This function will only be called
1200 * by the interrupt handler
1201 *
1202 */
1203 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1204 {
1205 int iobase = self->io.fir_base;
1206
1207 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1208 #if 0
1209 /* Disable Tx */
1210 register_bank(iobase, 0);
1211 outb(0x00, iobase + IRCC_LCR_B);
1212 #endif
1213 register_bank(iobase, 1);
1214 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1215 iobase + IRCC_SCE_CFGB);
1216
1217 /* Check for underrun! */
1218 register_bank(iobase, 0);
1219 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1220 self->stats.tx_errors++;
1221 self->stats.tx_fifo_errors++;
1222
1223 /* Reset error condition */
1224 register_bank(iobase, 0);
1225 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1226 outb(0x00, iobase + IRCC_MASTER);
1227 } else {
1228 self->stats.tx_packets++;
1229 self->stats.tx_bytes += self->tx_buff.len;
1230 }
1231
1232 /* Check if it's time to change the speed */
1233 if (self->new_speed) {
1234 smsc_ircc_change_speed(self, self->new_speed);
1235 self->new_speed = 0;
1236 }
1237
1238 netif_wake_queue(self->netdev);
1239 }
1240
1241 /*
1242 * Function smsc_ircc_dma_receive(self)
1243 *
1244 * Get ready for receiving a frame. The device will initiate a DMA
1245 * if it starts to receive a frame.
1246 *
1247 */
1248 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1249 {
1250 int iobase = self->io.fir_base;
1251 #if 0
1252 /* Turn off chip DMA */
1253 register_bank(iobase, 1);
1254 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1255 iobase + IRCC_SCE_CFGB);
1256 #endif
1257
1258 /* Disable Tx */
1259 register_bank(iobase, 0);
1260 outb(0x00, iobase + IRCC_LCR_B);
1261
1262 /* Turn off chip DMA */
1263 register_bank(iobase, 1);
1264 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1265 iobase + IRCC_SCE_CFGB);
1266
1267 self->io.direction = IO_RECV;
1268 self->rx_buff.data = self->rx_buff.head;
1269
1270 /* Set max Rx frame size */
1271 register_bank(iobase, 4);
1272 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1273 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1274
1275 /* Setup DMA controller */
1276 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1277 DMA_RX_MODE);
1278
1279 /* Enable burst mode chip Rx DMA */
1280 register_bank(iobase, 1);
1281 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1282 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1283
1284 /* Enable interrupt */
1285 register_bank(iobase, 0);
1286 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1287 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1288
1289 /* Enable receiver */
1290 register_bank(iobase, 0);
1291 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1292 iobase + IRCC_LCR_B);
1293
1294 return 0;
1295 }
1296
1297 /*
1298 * Function smsc_ircc_dma_receive_complete(self)
1299 *
1300 * Finished with receiving frames
1301 *
1302 */
1303 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1304 {
1305 struct sk_buff *skb;
1306 int len, msgcnt, lsr;
1307 int iobase = self->io.fir_base;
1308
1309 register_bank(iobase, 0);
1310
1311 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1312 #if 0
1313 /* Disable Rx */
1314 register_bank(iobase, 0);
1315 outb(0x00, iobase + IRCC_LCR_B);
1316 #endif
1317 register_bank(iobase, 0);
1318 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1319 lsr= inb(iobase + IRCC_LSR);
1320 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1321
1322 IRDA_DEBUG(2, "%s: dma count = %d\n", __FUNCTION__,
1323 get_dma_residue(self->io.dma));
1324
1325 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1326
1327 /* Look for errors */
1328 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1329 self->stats.rx_errors++;
1330 if (lsr & IRCC_LSR_FRAME_ERROR)
1331 self->stats.rx_frame_errors++;
1332 if (lsr & IRCC_LSR_CRC_ERROR)
1333 self->stats.rx_crc_errors++;
1334 if (lsr & IRCC_LSR_SIZE_ERROR)
1335 self->stats.rx_length_errors++;
1336 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1337 self->stats.rx_length_errors++;
1338 return;
1339 }
1340
1341 /* Remove CRC */
1342 len -= self->io.speed < 4000000 ? 2 : 4;
1343
1344 if (len < 2 || len > 2050) {
1345 IRDA_WARNING("%s(), bogus len=%d\n", __FUNCTION__, len);
1346 return;
1347 }
1348 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
1349
1350 skb = dev_alloc_skb(len + 1);
1351 if (!skb) {
1352 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1353 __FUNCTION__);
1354 return;
1355 }
1356 /* Make sure IP header gets aligned */
1357 skb_reserve(skb, 1);
1358
1359 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1360 self->stats.rx_packets++;
1361 self->stats.rx_bytes += len;
1362
1363 skb->dev = self->netdev;
1364 skb->mac.raw = skb->data;
1365 skb->protocol = htons(ETH_P_IRDA);
1366 netif_rx(skb);
1367 }
1368
1369 /*
1370 * Function smsc_ircc_sir_receive (self)
1371 *
1372 * Receive one frame from the infrared port
1373 *
1374 */
1375 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1376 {
1377 int boguscount = 0;
1378 int iobase;
1379
1380 IRDA_ASSERT(self != NULL, return;);
1381
1382 iobase = self->io.sir_base;
1383
1384 /*
1385 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1386 * async_unwrap_char will deliver all found frames
1387 */
1388 do {
1389 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
1390 inb(iobase + UART_RX));
1391
1392 /* Make sure we don't stay here to long */
1393 if (boguscount++ > 32) {
1394 IRDA_DEBUG(2, "%s(), breaking!\n", __FUNCTION__);
1395 break;
1396 }
1397 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1398 }
1399
1400
1401 /*
1402 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1403 *
1404 * An interrupt from the chip has arrived. Time to do some work
1405 *
1406 */
1407 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1408 {
1409 struct net_device *dev = (struct net_device *) dev_id;
1410 struct smsc_ircc_cb *self;
1411 int iobase, iir, lcra, lsr;
1412 irqreturn_t ret = IRQ_NONE;
1413
1414 if (dev == NULL) {
1415 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1416 driver_name, irq);
1417 goto irq_ret;
1418 }
1419
1420 self = netdev_priv(dev);
1421 IRDA_ASSERT(self != NULL, return IRQ_NONE;);
1422
1423 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1424 spin_lock(&self->lock);
1425
1426 /* Check if we should use the SIR interrupt handler */
1427 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1428 ret = smsc_ircc_interrupt_sir(dev);
1429 goto irq_ret_unlock;
1430 }
1431
1432 iobase = self->io.fir_base;
1433
1434 register_bank(iobase, 0);
1435 iir = inb(iobase + IRCC_IIR);
1436 if (iir == 0)
1437 goto irq_ret_unlock;
1438 ret = IRQ_HANDLED;
1439
1440 /* Disable interrupts */
1441 outb(0, iobase + IRCC_IER);
1442 lcra = inb(iobase + IRCC_LCR_A);
1443 lsr = inb(iobase + IRCC_LSR);
1444
1445 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __FUNCTION__, iir);
1446
1447 if (iir & IRCC_IIR_EOM) {
1448 if (self->io.direction == IO_RECV)
1449 smsc_ircc_dma_receive_complete(self);
1450 else
1451 smsc_ircc_dma_xmit_complete(self);
1452
1453 smsc_ircc_dma_receive(self);
1454 }
1455
1456 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1457 /*printk(KERN_WARNING "%s(): Active Frame\n", __FUNCTION__);*/
1458 }
1459
1460 /* Enable interrupts again */
1461
1462 register_bank(iobase, 0);
1463 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1464
1465 irq_ret_unlock:
1466 spin_unlock(&self->lock);
1467 irq_ret:
1468 return ret;
1469 }
1470
1471 /*
1472 * Function irport_interrupt_sir (irq, dev_id, regs)
1473 *
1474 * Interrupt handler for SIR modes
1475 */
1476 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1477 {
1478 struct smsc_ircc_cb *self = netdev_priv(dev);
1479 int boguscount = 0;
1480 int iobase;
1481 int iir, lsr;
1482
1483 /* Already locked comming here in smsc_ircc_interrupt() */
1484 /*spin_lock(&self->lock);*/
1485
1486 iobase = self->io.sir_base;
1487
1488 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1489 if (iir == 0)
1490 return IRQ_NONE;
1491 while (iir) {
1492 /* Clear interrupt */
1493 lsr = inb(iobase + UART_LSR);
1494
1495 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1496 __FUNCTION__, iir, lsr, iobase);
1497
1498 switch (iir) {
1499 case UART_IIR_RLSI:
1500 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
1501 break;
1502 case UART_IIR_RDI:
1503 /* Receive interrupt */
1504 smsc_ircc_sir_receive(self);
1505 break;
1506 case UART_IIR_THRI:
1507 if (lsr & UART_LSR_THRE)
1508 /* Transmitter ready for data */
1509 smsc_ircc_sir_write_wakeup(self);
1510 break;
1511 default:
1512 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1513 __FUNCTION__, iir);
1514 break;
1515 }
1516
1517 /* Make sure we don't stay here to long */
1518 if (boguscount++ > 100)
1519 break;
1520
1521 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1522 }
1523 /*spin_unlock(&self->lock);*/
1524 return IRQ_HANDLED;
1525 }
1526
1527
1528 #if 0 /* unused */
1529 /*
1530 * Function ircc_is_receiving (self)
1531 *
1532 * Return TRUE is we are currently receiving a frame
1533 *
1534 */
1535 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1536 {
1537 int status = FALSE;
1538 /* int iobase; */
1539
1540 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1541
1542 IRDA_ASSERT(self != NULL, return FALSE;);
1543
1544 IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
1545 get_dma_residue(self->io.dma));
1546
1547 status = (self->rx_buff.state != OUTSIDE_FRAME);
1548
1549 return status;
1550 }
1551 #endif /* unused */
1552
1553 static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1554 {
1555 int error;
1556
1557 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1558 self->netdev->name, self->netdev);
1559 if (error)
1560 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1561 __FUNCTION__, self->io.irq, error);
1562
1563 return error;
1564 }
1565
1566 static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1567 {
1568 unsigned long flags;
1569
1570 spin_lock_irqsave(&self->lock, flags);
1571
1572 self->io.speed = 0;
1573 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1574
1575 spin_unlock_irqrestore(&self->lock, flags);
1576 }
1577
1578 static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1579 {
1580 int iobase = self->io.fir_base;
1581 unsigned long flags;
1582
1583 spin_lock_irqsave(&self->lock, flags);
1584
1585 register_bank(iobase, 0);
1586 outb(0, iobase + IRCC_IER);
1587 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1588 outb(0x00, iobase + IRCC_MASTER);
1589
1590 spin_unlock_irqrestore(&self->lock, flags);
1591 }
1592
1593
1594 /*
1595 * Function smsc_ircc_net_open (dev)
1596 *
1597 * Start the device
1598 *
1599 */
1600 static int smsc_ircc_net_open(struct net_device *dev)
1601 {
1602 struct smsc_ircc_cb *self;
1603 char hwname[16];
1604
1605 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1606
1607 IRDA_ASSERT(dev != NULL, return -1;);
1608 self = netdev_priv(dev);
1609 IRDA_ASSERT(self != NULL, return 0;);
1610
1611 if (self->io.suspended) {
1612 IRDA_DEBUG(0, "%s(), device is suspended\n", __FUNCTION__);
1613 return -EAGAIN;
1614 }
1615
1616 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1617 (void *) dev)) {
1618 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1619 __FUNCTION__, self->io.irq);
1620 return -EAGAIN;
1621 }
1622
1623 smsc_ircc_start_interrupts(self);
1624
1625 /* Give self a hardware name */
1626 /* It would be cool to offer the chip revision here - Jean II */
1627 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1628
1629 /*
1630 * Open new IrLAP layer instance, now that everything should be
1631 * initialized properly
1632 */
1633 self->irlap = irlap_open(dev, &self->qos, hwname);
1634
1635 /*
1636 * Always allocate the DMA channel after the IRQ,
1637 * and clean up on failure.
1638 */
1639 if (request_dma(self->io.dma, dev->name)) {
1640 smsc_ircc_net_close(dev);
1641
1642 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1643 __FUNCTION__, self->io.dma);
1644 return -EAGAIN;
1645 }
1646
1647 netif_start_queue(dev);
1648
1649 return 0;
1650 }
1651
1652 /*
1653 * Function smsc_ircc_net_close (dev)
1654 *
1655 * Stop the device
1656 *
1657 */
1658 static int smsc_ircc_net_close(struct net_device *dev)
1659 {
1660 struct smsc_ircc_cb *self;
1661
1662 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1663
1664 IRDA_ASSERT(dev != NULL, return -1;);
1665 self = netdev_priv(dev);
1666 IRDA_ASSERT(self != NULL, return 0;);
1667
1668 /* Stop device */
1669 netif_stop_queue(dev);
1670
1671 /* Stop and remove instance of IrLAP */
1672 if (self->irlap)
1673 irlap_close(self->irlap);
1674 self->irlap = NULL;
1675
1676 smsc_ircc_stop_interrupts(self);
1677
1678 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1679 if (!self->io.suspended)
1680 free_irq(self->io.irq, dev);
1681
1682 disable_dma(self->io.dma);
1683 free_dma(self->io.dma);
1684
1685 return 0;
1686 }
1687
1688 static int smsc_ircc_suspend(struct device *dev, pm_message_t state)
1689 {
1690 struct smsc_ircc_cb *self = dev_get_drvdata(dev);
1691
1692 if (!self->io.suspended) {
1693 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1694
1695 rtnl_lock();
1696 if (netif_running(self->netdev)) {
1697 netif_device_detach(self->netdev);
1698 smsc_ircc_stop_interrupts(self);
1699 free_irq(self->io.irq, self->netdev);
1700 disable_dma(self->io.dma);
1701 }
1702 self->io.suspended = 1;
1703 rtnl_unlock();
1704 }
1705
1706 return 0;
1707 }
1708
1709 static int smsc_ircc_resume(struct device *dev)
1710 {
1711 struct smsc_ircc_cb *self = dev_get_drvdata(dev);
1712
1713 if (self->io.suspended) {
1714 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1715
1716 rtnl_lock();
1717 smsc_ircc_init_chip(self);
1718 if (netif_running(self->netdev)) {
1719 if (smsc_ircc_request_irq(self)) {
1720 /*
1721 * Don't fail resume process, just kill this
1722 * network interface
1723 */
1724 unregister_netdevice(self->netdev);
1725 } else {
1726 enable_dma(self->io.dma);
1727 smsc_ircc_start_interrupts(self);
1728 netif_device_attach(self->netdev);
1729 }
1730 }
1731 self->io.suspended = 0;
1732 rtnl_unlock();
1733 }
1734 return 0;
1735 }
1736
1737 /*
1738 * Function smsc_ircc_close (self)
1739 *
1740 * Close driver instance
1741 *
1742 */
1743 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1744 {
1745 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1746
1747 IRDA_ASSERT(self != NULL, return -1;);
1748
1749 platform_device_unregister(self->pldev);
1750
1751 /* Remove netdevice */
1752 unregister_netdev(self->netdev);
1753
1754 smsc_ircc_stop_interrupts(self);
1755
1756 /* Release the PORTS that this driver is using */
1757 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1758 self->io.fir_base);
1759
1760 release_region(self->io.fir_base, self->io.fir_ext);
1761
1762 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1763 self->io.sir_base);
1764
1765 release_region(self->io.sir_base, self->io.sir_ext);
1766
1767 if (self->tx_buff.head)
1768 dma_free_coherent(NULL, self->tx_buff.truesize,
1769 self->tx_buff.head, self->tx_buff_dma);
1770
1771 if (self->rx_buff.head)
1772 dma_free_coherent(NULL, self->rx_buff.truesize,
1773 self->rx_buff.head, self->rx_buff_dma);
1774
1775 free_netdev(self->netdev);
1776
1777 return 0;
1778 }
1779
1780 static void __exit smsc_ircc_cleanup(void)
1781 {
1782 int i;
1783
1784 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1785
1786 for (i = 0; i < 2; i++) {
1787 if (dev_self[i])
1788 smsc_ircc_close(dev_self[i]);
1789 }
1790
1791 driver_unregister(&smsc_ircc_driver);
1792 }
1793
1794 /*
1795 * Start SIR operations
1796 *
1797 * This function *must* be called with spinlock held, because it may
1798 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1799 */
1800 void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1801 {
1802 struct net_device *dev;
1803 int fir_base, sir_base;
1804
1805 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1806
1807 IRDA_ASSERT(self != NULL, return;);
1808 dev = self->netdev;
1809 IRDA_ASSERT(dev != NULL, return;);
1810 dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
1811
1812 fir_base = self->io.fir_base;
1813 sir_base = self->io.sir_base;
1814
1815 /* Reset everything */
1816 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1817
1818 #if SMSC_IRCC2_C_SIR_STOP
1819 /*smsc_ircc_sir_stop(self);*/
1820 #endif
1821
1822 register_bank(fir_base, 1);
1823 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1824
1825 /* Initialize UART */
1826 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1827 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1828
1829 /* Turn on interrups */
1830 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1831
1832 IRDA_DEBUG(3, "%s() - exit\n", __FUNCTION__);
1833
1834 outb(0x00, fir_base + IRCC_MASTER);
1835 }
1836
1837 #if SMSC_IRCC2_C_SIR_STOP
1838 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1839 {
1840 int iobase;
1841
1842 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1843 iobase = self->io.sir_base;
1844
1845 /* Reset UART */
1846 outb(0, iobase + UART_MCR);
1847
1848 /* Turn off interrupts */
1849 outb(0, iobase + UART_IER);
1850 }
1851 #endif
1852
1853 /*
1854 * Function smsc_sir_write_wakeup (self)
1855 *
1856 * Called by the SIR interrupt handler when there's room for more data.
1857 * If we have more packets to send, we send them here.
1858 *
1859 */
1860 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1861 {
1862 int actual = 0;
1863 int iobase;
1864 int fcr;
1865
1866 IRDA_ASSERT(self != NULL, return;);
1867
1868 IRDA_DEBUG(4, "%s\n", __FUNCTION__);
1869
1870 iobase = self->io.sir_base;
1871
1872 /* Finished with frame? */
1873 if (self->tx_buff.len > 0) {
1874 /* Write data left in transmit buffer */
1875 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1876 self->tx_buff.data, self->tx_buff.len);
1877 self->tx_buff.data += actual;
1878 self->tx_buff.len -= actual;
1879 } else {
1880
1881 /*if (self->tx_buff.len ==0) {*/
1882
1883 /*
1884 * Now serial buffer is almost free & we can start
1885 * transmission of another packet. But first we must check
1886 * if we need to change the speed of the hardware
1887 */
1888 if (self->new_speed) {
1889 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1890 __FUNCTION__, self->new_speed);
1891 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1892 smsc_ircc_change_speed(self, self->new_speed);
1893 self->new_speed = 0;
1894 } else {
1895 /* Tell network layer that we want more frames */
1896 netif_wake_queue(self->netdev);
1897 }
1898 self->stats.tx_packets++;
1899
1900 if (self->io.speed <= 115200) {
1901 /*
1902 * Reset Rx FIFO to make sure that all reflected transmit data
1903 * is discarded. This is needed for half duplex operation
1904 */
1905 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
1906 fcr |= self->io.speed < 38400 ?
1907 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1908
1909 outb(fcr, iobase + UART_FCR);
1910
1911 /* Turn on receive interrupts */
1912 outb(UART_IER_RDI, iobase + UART_IER);
1913 }
1914 }
1915 }
1916
1917 /*
1918 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
1919 *
1920 * Fill Tx FIFO with transmit data
1921 *
1922 */
1923 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1924 {
1925 int actual = 0;
1926
1927 /* Tx FIFO should be empty! */
1928 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
1929 IRDA_WARNING("%s(), failed, fifo not empty!\n", __FUNCTION__);
1930 return 0;
1931 }
1932
1933 /* Fill FIFO with current frame */
1934 while (fifo_size-- > 0 && actual < len) {
1935 /* Transmit next byte */
1936 outb(buf[actual], iobase + UART_TX);
1937 actual++;
1938 }
1939 return actual;
1940 }
1941
1942 /*
1943 * Function smsc_ircc_is_receiving (self)
1944 *
1945 * Returns true is we are currently receiving data
1946 *
1947 */
1948 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
1949 {
1950 return (self->rx_buff.state != OUTSIDE_FRAME);
1951 }
1952
1953
1954 /*
1955 * Function smsc_ircc_probe_transceiver(self)
1956 *
1957 * Tries to find the used Transceiver
1958 *
1959 */
1960 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
1961 {
1962 unsigned int i;
1963
1964 IRDA_ASSERT(self != NULL, return;);
1965
1966 for (i = 0; smsc_transceivers[i].name != NULL; i++)
1967 if (smsc_transceivers[i].probe(self->io.fir_base)) {
1968 IRDA_MESSAGE(" %s transceiver found\n",
1969 smsc_transceivers[i].name);
1970 self->transceiver= i + 1;
1971 return;
1972 }
1973
1974 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
1975 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
1976
1977 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
1978 }
1979
1980
1981 /*
1982 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
1983 *
1984 * Set the transceiver according to the speed
1985 *
1986 */
1987 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
1988 {
1989 unsigned int trx;
1990
1991 trx = self->transceiver;
1992 if (trx > 0)
1993 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
1994 }
1995
1996 /*
1997 * Function smsc_ircc_wait_hw_transmitter_finish ()
1998 *
1999 * Wait for the real end of HW transmission
2000 *
2001 * The UART is a strict FIFO, and we get called only when we have finished
2002 * pushing data to the FIFO, so the maximum amount of time we must wait
2003 * is only for the FIFO to drain out.
2004 *
2005 * We use a simple calibrated loop. We may need to adjust the loop
2006 * delay (udelay) to balance I/O traffic and latency. And we also need to
2007 * adjust the maximum timeout.
2008 * It would probably be better to wait for the proper interrupt,
2009 * but it doesn't seem to be available.
2010 *
2011 * We can't use jiffies or kernel timers because :
2012 * 1) We are called from the interrupt handler, which disable softirqs,
2013 * so jiffies won't be increased
2014 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2015 * want to wait that long to detect stuck hardware.
2016 * Jean II
2017 */
2018
2019 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2020 {
2021 int iobase = self->io.sir_base;
2022 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2023
2024 /* Calibrated busy loop */
2025 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2026 udelay(1);
2027
2028 if (count == 0)
2029 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__);
2030 }
2031
2032
2033 /* PROBING
2034 *
2035 *
2036 */
2037
2038 static int __init smsc_ircc_look_for_chips(void)
2039 {
2040 struct smsc_chip_address *address;
2041 char *type;
2042 unsigned int cfg_base, found;
2043
2044 found = 0;
2045 address = possible_addresses;
2046
2047 while (address->cfg_base) {
2048 cfg_base = address->cfg_base;
2049
2050 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __FUNCTION__, cfg_base, address->type);*/
2051
2052 if (address->type & SMSCSIO_TYPE_FDC) {
2053 type = "FDC";
2054 if (address->type & SMSCSIO_TYPE_FLAT)
2055 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2056 found++;
2057
2058 if (address->type & SMSCSIO_TYPE_PAGED)
2059 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2060 found++;
2061 }
2062 if (address->type & SMSCSIO_TYPE_LPC) {
2063 type = "LPC";
2064 if (address->type & SMSCSIO_TYPE_FLAT)
2065 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2066 found++;
2067
2068 if (address->type & SMSCSIO_TYPE_PAGED)
2069 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2070 found++;
2071 }
2072 address++;
2073 }
2074 return found;
2075 }
2076
2077 /*
2078 * Function smsc_superio_flat (chip, base, type)
2079 *
2080 * Try to get configuration of a smc SuperIO chip with flat register model
2081 *
2082 */
2083 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2084 {
2085 unsigned short firbase, sirbase;
2086 u8 mode, dma, irq;
2087 int ret = -ENODEV;
2088
2089 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2090
2091 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2092 return ret;
2093
2094 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2095 mode = inb(cfgbase + 1);
2096
2097 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __FUNCTION__, mode);*/
2098
2099 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2100 IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
2101
2102 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2103 sirbase = inb(cfgbase + 1) << 2;
2104
2105 /* FIR iobase */
2106 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2107 firbase = inb(cfgbase + 1) << 3;
2108
2109 /* DMA */
2110 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2111 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2112
2113 /* IRQ */
2114 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2115 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2116
2117 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __FUNCTION__, firbase, sirbase, dma, irq, mode);
2118
2119 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2120 ret = 0;
2121
2122 /* Exit configuration */
2123 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2124
2125 return ret;
2126 }
2127
2128 /*
2129 * Function smsc_superio_paged (chip, base, type)
2130 *
2131 * Try to get configuration of a smc SuperIO chip with paged register model
2132 *
2133 */
2134 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2135 {
2136 unsigned short fir_io, sir_io;
2137 int ret = -ENODEV;
2138
2139 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2140
2141 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2142 return ret;
2143
2144 /* Select logical device (UART2) */
2145 outb(0x07, cfg_base);
2146 outb(0x05, cfg_base + 1);
2147
2148 /* SIR iobase */
2149 outb(0x60, cfg_base);
2150 sir_io = inb(cfg_base + 1) << 8;
2151 outb(0x61, cfg_base);
2152 sir_io |= inb(cfg_base + 1);
2153
2154 /* Read FIR base */
2155 outb(0x62, cfg_base);
2156 fir_io = inb(cfg_base + 1) << 8;
2157 outb(0x63, cfg_base);
2158 fir_io |= inb(cfg_base + 1);
2159 outb(0x2b, cfg_base); /* ??? */
2160
2161 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2162 ret = 0;
2163
2164 /* Exit configuration */
2165 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2166
2167 return ret;
2168 }
2169
2170
2171 static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2172 {
2173 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2174
2175 outb(reg, cfg_base);
2176 return inb(cfg_base) != reg ? -1 : 0;
2177 }
2178
2179 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2180 {
2181 u8 devid, xdevid, rev;
2182
2183 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2184
2185 /* Leave configuration */
2186
2187 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2188
2189 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2190 return NULL;
2191
2192 outb(reg, cfg_base);
2193
2194 xdevid = inb(cfg_base + 1);
2195
2196 /* Enter configuration */
2197
2198 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2199
2200 #if 0
2201 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2202 return NULL;
2203 #endif
2204
2205 /* probe device ID */
2206
2207 if (smsc_access(cfg_base, reg))
2208 return NULL;
2209
2210 devid = inb(cfg_base + 1);
2211
2212 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2213 return NULL;
2214
2215 /* probe revision ID */
2216
2217 if (smsc_access(cfg_base, reg + 1))
2218 return NULL;
2219
2220 rev = inb(cfg_base + 1);
2221
2222 if (rev >= 128) /* i think this will make no sense */
2223 return NULL;
2224
2225 if (devid == xdevid) /* protection against false positives */
2226 return NULL;
2227
2228 /* Check for expected device ID; are there others? */
2229
2230 while (chip->devid != devid) {
2231
2232 chip++;
2233
2234 if (chip->name == NULL)
2235 return NULL;
2236 }
2237
2238 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2239 devid, rev, cfg_base, type, chip->name);
2240
2241 if (chip->rev > rev) {
2242 IRDA_MESSAGE("Revision higher than expected\n");
2243 return NULL;
2244 }
2245
2246 if (chip->flags & NoIRDA)
2247 IRDA_MESSAGE("chipset does not support IRDA\n");
2248
2249 return chip;
2250 }
2251
2252 static int __init smsc_superio_fdc(unsigned short cfg_base)
2253 {
2254 int ret = -1;
2255
2256 if (!request_region(cfg_base, 2, driver_name)) {
2257 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2258 __FUNCTION__, cfg_base);
2259 } else {
2260 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2261 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2262 ret = 0;
2263
2264 release_region(cfg_base, 2);
2265 }
2266
2267 return ret;
2268 }
2269
2270 static int __init smsc_superio_lpc(unsigned short cfg_base)
2271 {
2272 int ret = -1;
2273
2274 if (!request_region(cfg_base, 2, driver_name)) {
2275 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2276 __FUNCTION__, cfg_base);
2277 } else {
2278 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2279 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2280 ret = 0;
2281
2282 release_region(cfg_base, 2);
2283 }
2284 return ret;
2285 }
2286
2287 /************************************************
2288 *
2289 * Transceivers specific functions
2290 *
2291 ************************************************/
2292
2293
2294 /*
2295 * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2296 *
2297 * Program transceiver through smsc-ircc ATC circuitry
2298 *
2299 */
2300
2301 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2302 {
2303 unsigned long jiffies_now, jiffies_timeout;
2304 u8 val;
2305
2306 jiffies_now = jiffies;
2307 jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2308
2309 /* ATC */
2310 register_bank(fir_base, 4);
2311 outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
2312 fir_base + IRCC_ATC);
2313
2314 while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
2315 !time_after(jiffies, jiffies_timeout))
2316 /* empty */;
2317
2318 if (val)
2319 IRDA_WARNING("%s(): ATC: 0x%02x\n", __FUNCTION__,
2320 inb(fir_base + IRCC_ATC));
2321 }
2322
2323 /*
2324 * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2325 *
2326 * Probe transceiver smsc-ircc ATC circuitry
2327 *
2328 */
2329
2330 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2331 {
2332 return 0;
2333 }
2334
2335 /*
2336 * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2337 *
2338 * Set transceiver
2339 *
2340 */
2341
2342 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2343 {
2344 u8 fast_mode;
2345
2346 switch (speed) {
2347 default:
2348 case 576000 :
2349 fast_mode = 0;
2350 break;
2351 case 1152000 :
2352 case 4000000 :
2353 fast_mode = IRCC_LCR_A_FAST;
2354 break;
2355 }
2356 register_bank(fir_base, 0);
2357 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2358 }
2359
2360 /*
2361 * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2362 *
2363 * Probe transceiver
2364 *
2365 */
2366
2367 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2368 {
2369 return 0;
2370 }
2371
2372 /*
2373 * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2374 *
2375 * Set transceiver
2376 *
2377 */
2378
2379 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
2380 {
2381 u8 fast_mode;
2382
2383 switch (speed) {
2384 default:
2385 case 576000 :
2386 fast_mode = 0;
2387 break;
2388 case 1152000 :
2389 case 4000000 :
2390 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
2391 break;
2392
2393 }
2394 /* This causes an interrupt */
2395 register_bank(fir_base, 0);
2396 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2397 }
2398
2399 /*
2400 * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
2401 *
2402 * Probe transceiver
2403 *
2404 */
2405
2406 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
2407 {
2408 return 0;
2409 }
2410
2411
2412 module_init(smsc_ircc_init);
2413 module_exit(smsc_ircc_cleanup);
x86 "subsystem" repository