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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
[deliverable/linux.git] / drivers / net / irda / smsc-ircc2.c
1 /*********************************************************************
2 *
3 * Description: Driver for the SMC Infrared Communications Controller
4 * Status: Experimental.
5 * Author: Daniele Peri (peri@csai.unipa.it)
6 * Created at:
7 * Modified at:
8 * Modified by:
9 *
10 * Copyright (c) 2002 Daniele Peri
11 * All Rights Reserved.
12 * Copyright (c) 2002 Jean Tourrilhes
13 * Copyright (c) 2006 Linus Walleij
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/pnp.h>
57 #include <linux/platform_device.h>
58
59 #include <asm/io.h>
60 #include <asm/dma.h>
61 #include <asm/byteorder.h>
62
63 #include <linux/spinlock.h>
64 #include <linux/pm.h>
65 #ifdef CONFIG_PCI
66 #include <linux/pci.h>
67 #endif
68
69 #include <net/irda/wrapper.h>
70 #include <net/irda/irda.h>
71 #include <net/irda/irda_device.h>
72
73 #include "smsc-ircc2.h"
74 #include "smsc-sio.h"
75
76
77 MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
78 MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
79 MODULE_LICENSE("GPL");
80
81 static int smsc_nopnp = 1;
82 module_param_named(nopnp, smsc_nopnp, bool, 0);
83 MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings, defaults to true");
84
85 #define DMA_INVAL 255
86 static int ircc_dma = DMA_INVAL;
87 module_param(ircc_dma, int, 0);
88 MODULE_PARM_DESC(ircc_dma, "DMA channel");
89
90 #define IRQ_INVAL 255
91 static int ircc_irq = IRQ_INVAL;
92 module_param(ircc_irq, int, 0);
93 MODULE_PARM_DESC(ircc_irq, "IRQ line");
94
95 static int ircc_fir;
96 module_param(ircc_fir, int, 0);
97 MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
98
99 static int ircc_sir;
100 module_param(ircc_sir, int, 0);
101 MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
102
103 static int ircc_cfg;
104 module_param(ircc_cfg, int, 0);
105 MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
106
107 static int ircc_transceiver;
108 module_param(ircc_transceiver, int, 0);
109 MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
110
111 /* Types */
112
113 #ifdef CONFIG_PCI
114 struct smsc_ircc_subsystem_configuration {
115 unsigned short vendor; /* PCI vendor ID */
116 unsigned short device; /* PCI vendor ID */
117 unsigned short subvendor; /* PCI subsystem vendor ID */
118 unsigned short subdevice; /* PCI sybsystem device ID */
119 unsigned short sir_io; /* I/O port for SIR */
120 unsigned short fir_io; /* I/O port for FIR */
121 unsigned char fir_irq; /* FIR IRQ */
122 unsigned char fir_dma; /* FIR DMA */
123 unsigned short cfg_base; /* I/O port for chip configuration */
124 int (*preconfigure)(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf); /* Preconfig function */
125 const char *name; /* name shown as info */
126 };
127 #endif
128
129 struct smsc_transceiver {
130 char *name;
131 void (*set_for_speed)(int fir_base, u32 speed);
132 int (*probe)(int fir_base);
133 };
134
135 struct smsc_chip {
136 char *name;
137 #if 0
138 u8 type;
139 #endif
140 u16 flags;
141 u8 devid;
142 u8 rev;
143 };
144
145 struct smsc_chip_address {
146 unsigned int cfg_base;
147 unsigned int type;
148 };
149
150 /* Private data for each instance */
151 struct smsc_ircc_cb {
152 struct net_device *netdev; /* Yes! we are some kind of netdevice */
153 struct irlap_cb *irlap; /* The link layer we are binded to */
154
155 chipio_t io; /* IrDA controller information */
156 iobuff_t tx_buff; /* Transmit buffer */
157 iobuff_t rx_buff; /* Receive buffer */
158 dma_addr_t tx_buff_dma;
159 dma_addr_t rx_buff_dma;
160
161 struct qos_info qos; /* QoS capabilities for this device */
162
163 spinlock_t lock; /* For serializing operations */
164
165 __u32 new_speed;
166 __u32 flags; /* Interface flags */
167
168 int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
169 int tx_len; /* Number of frames in tx_buff */
170
171 int transceiver;
172 struct platform_device *pldev;
173 };
174
175 /* Constants */
176
177 #define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
178
179 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
180 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
181 #define SMSC_IRCC2_C_NET_TIMEOUT 0
182 #define SMSC_IRCC2_C_SIR_STOP 0
183
184 static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
185
186 /* Prototypes */
187
188 static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
189 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
190 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
191 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
192 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
193 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
194 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
195 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
196 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
197 static int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
198 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
199 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs);
200 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self);
201 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed);
202 static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, u32 speed);
203 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id);
204 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
205 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
206 #if SMSC_IRCC2_C_SIR_STOP
207 static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
208 #endif
209 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
210 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
211 static int smsc_ircc_net_open(struct net_device *dev);
212 static int smsc_ircc_net_close(struct net_device *dev);
213 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
214 #if SMSC_IRCC2_C_NET_TIMEOUT
215 static void smsc_ircc_timeout(struct net_device *dev);
216 #endif
217 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
218 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
219 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
220 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
221
222 /* Probing */
223 static int __init smsc_ircc_look_for_chips(void);
224 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
225 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
226 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
227 static int __init smsc_superio_fdc(unsigned short cfg_base);
228 static int __init smsc_superio_lpc(unsigned short cfg_base);
229 #ifdef CONFIG_PCI
230 static int __init preconfigure_smsc_chip(struct smsc_ircc_subsystem_configuration *conf);
231 static int __init preconfigure_through_82801(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
232 static void __init preconfigure_ali_port(struct pci_dev *dev,
233 unsigned short port);
234 static int __init preconfigure_through_ali(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
235 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
236 unsigned short ircc_fir,
237 unsigned short ircc_sir,
238 unsigned char ircc_dma,
239 unsigned char ircc_irq);
240 #endif
241
242 /* Transceivers specific functions */
243
244 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
245 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
246 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
247 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
248 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
249 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
250
251 /* Power Management */
252
253 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
254 static int smsc_ircc_resume(struct platform_device *dev);
255
256 static struct platform_driver smsc_ircc_driver = {
257 .suspend = smsc_ircc_suspend,
258 .resume = smsc_ircc_resume,
259 .driver = {
260 .name = SMSC_IRCC2_DRIVER_NAME,
261 },
262 };
263
264 /* Transceivers for SMSC-ircc */
265
266 static struct smsc_transceiver smsc_transceivers[] =
267 {
268 { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
269 { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
270 { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
271 { NULL, NULL }
272 };
273 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
274
275 /* SMC SuperIO chipsets definitions */
276
277 #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
278 #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
279 #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
280 #define SIR 0 /* SuperIO Chip has only slow IRDA */
281 #define FIR 4 /* SuperIO Chip has fast IRDA */
282 #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
283
284 static struct smsc_chip __initdata fdc_chips_flat[] =
285 {
286 /* Base address 0x3f0 or 0x370 */
287 { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
288 { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
289 { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
290 { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
291 { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
292 { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
293 { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
294 { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
295 { NULL }
296 };
297
298 static struct smsc_chip __initdata fdc_chips_paged[] =
299 {
300 /* Base address 0x3f0 or 0x370 */
301 { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
302 { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
303 { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
304 { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
305 { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
306 { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
307 { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
308 { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
309 { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
310 { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
311 { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
312 { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
313 { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
314 { NULL }
315 };
316
317 static struct smsc_chip __initdata lpc_chips_flat[] =
318 {
319 /* Base address 0x2E or 0x4E */
320 { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
321 { "47N227", KEY55_1|FIR|SERx4, 0x7a, 0x00 },
322 { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
323 { NULL }
324 };
325
326 static struct smsc_chip __initdata lpc_chips_paged[] =
327 {
328 /* Base address 0x2E or 0x4E */
329 { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
330 { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
331 { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
332 { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
333 { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
334 { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
335 { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
336 { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
337 { NULL }
338 };
339
340 #define SMSCSIO_TYPE_FDC 1
341 #define SMSCSIO_TYPE_LPC 2
342 #define SMSCSIO_TYPE_FLAT 4
343 #define SMSCSIO_TYPE_PAGED 8
344
345 static struct smsc_chip_address __initdata possible_addresses[] =
346 {
347 { 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
348 { 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
349 { 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
350 { 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
351 { 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
352 { 0, 0 }
353 };
354
355 /* Globals */
356
357 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
358 static unsigned short dev_count;
359
360 static inline void register_bank(int iobase, int bank)
361 {
362 outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
363 iobase + IRCC_MASTER);
364 }
365
366 /* PNP hotplug support */
367 static const struct pnp_device_id smsc_ircc_pnp_table[] = {
368 { .id = "SMCf010", .driver_data = 0 },
369 /* and presumably others */
370 { }
371 };
372 MODULE_DEVICE_TABLE(pnp, smsc_ircc_pnp_table);
373
374 static int pnp_driver_registered;
375
376 #ifdef CONFIG_PNP
377 static int __init smsc_ircc_pnp_probe(struct pnp_dev *dev,
378 const struct pnp_device_id *dev_id)
379 {
380 unsigned int firbase, sirbase;
381 u8 dma, irq;
382
383 if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
384 pnp_dma_valid(dev, 0) && pnp_irq_valid(dev, 0)))
385 return -EINVAL;
386
387 sirbase = pnp_port_start(dev, 0);
388 firbase = pnp_port_start(dev, 1);
389 dma = pnp_dma(dev, 0);
390 irq = pnp_irq(dev, 0);
391
392 if (smsc_ircc_open(firbase, sirbase, dma, irq))
393 return -ENODEV;
394
395 return 0;
396 }
397
398 static struct pnp_driver smsc_ircc_pnp_driver = {
399 .name = "smsc-ircc2",
400 .id_table = smsc_ircc_pnp_table,
401 .probe = smsc_ircc_pnp_probe,
402 };
403 #else /* CONFIG_PNP */
404 static struct pnp_driver smsc_ircc_pnp_driver;
405 #endif
406
407 /*******************************************************************************
408 *
409 *
410 * SMSC-ircc stuff
411 *
412 *
413 *******************************************************************************/
414
415 static int __init smsc_ircc_legacy_probe(void)
416 {
417 int ret = 0;
418
419 #ifdef CONFIG_PCI
420 if (smsc_ircc_preconfigure_subsystems(ircc_cfg, ircc_fir, ircc_sir, ircc_dma, ircc_irq) < 0) {
421 /* Ignore errors from preconfiguration */
422 IRDA_ERROR("%s, Preconfiguration failed !\n", driver_name);
423 }
424 #endif
425
426 if (ircc_fir > 0 && ircc_sir > 0) {
427 IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
428 IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
429
430 if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq))
431 ret = -ENODEV;
432 } else {
433 ret = -ENODEV;
434
435 /* try user provided configuration register base address */
436 if (ircc_cfg > 0) {
437 IRDA_MESSAGE(" Overriding configuration address "
438 "0x%04x\n", ircc_cfg);
439 if (!smsc_superio_fdc(ircc_cfg))
440 ret = 0;
441 if (!smsc_superio_lpc(ircc_cfg))
442 ret = 0;
443 }
444
445 if (smsc_ircc_look_for_chips() > 0)
446 ret = 0;
447 }
448 return ret;
449 }
450
451 /*
452 * Function smsc_ircc_init ()
453 *
454 * Initialize chip. Just try to find out how many chips we are dealing with
455 * and where they are
456 */
457 static int __init smsc_ircc_init(void)
458 {
459 int ret;
460
461 IRDA_DEBUG(1, "%s\n", __func__);
462
463 ret = platform_driver_register(&smsc_ircc_driver);
464 if (ret) {
465 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
466 return ret;
467 }
468
469 dev_count = 0;
470
471 if (smsc_nopnp || !pnp_platform_devices ||
472 ircc_cfg || ircc_fir || ircc_sir ||
473 ircc_dma != DMA_INVAL || ircc_irq != IRQ_INVAL) {
474 ret = smsc_ircc_legacy_probe();
475 } else {
476 if (pnp_register_driver(&smsc_ircc_pnp_driver) == 0)
477 pnp_driver_registered = 1;
478 }
479
480 if (ret) {
481 if (pnp_driver_registered)
482 pnp_unregister_driver(&smsc_ircc_pnp_driver);
483 platform_driver_unregister(&smsc_ircc_driver);
484 }
485
486 return ret;
487 }
488
489 /*
490 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
491 *
492 * Try to open driver instance
493 *
494 */
495 static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
496 {
497 struct smsc_ircc_cb *self;
498 struct net_device *dev;
499 int err;
500
501 IRDA_DEBUG(1, "%s\n", __func__);
502
503 err = smsc_ircc_present(fir_base, sir_base);
504 if (err)
505 goto err_out;
506
507 err = -ENOMEM;
508 if (dev_count >= ARRAY_SIZE(dev_self)) {
509 IRDA_WARNING("%s(), too many devices!\n", __func__);
510 goto err_out1;
511 }
512
513 /*
514 * Allocate new instance of the driver
515 */
516 dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
517 if (!dev) {
518 IRDA_WARNING("%s() can't allocate net device\n", __func__);
519 goto err_out1;
520 }
521
522 dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
523 #if SMSC_IRCC2_C_NET_TIMEOUT
524 dev->tx_timeout = smsc_ircc_timeout;
525 dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
526 #endif
527 dev->open = smsc_ircc_net_open;
528 dev->stop = smsc_ircc_net_close;
529 dev->do_ioctl = smsc_ircc_net_ioctl;
530
531 self = netdev_priv(dev);
532 self->netdev = dev;
533
534 /* Make ifconfig display some details */
535 dev->base_addr = self->io.fir_base = fir_base;
536 dev->irq = self->io.irq = irq;
537
538 /* Need to store self somewhere */
539 dev_self[dev_count] = self;
540 spin_lock_init(&self->lock);
541
542 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
543 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
544
545 self->rx_buff.head =
546 dma_alloc_coherent(NULL, self->rx_buff.truesize,
547 &self->rx_buff_dma, GFP_KERNEL);
548 if (self->rx_buff.head == NULL) {
549 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
550 driver_name);
551 goto err_out2;
552 }
553
554 self->tx_buff.head =
555 dma_alloc_coherent(NULL, self->tx_buff.truesize,
556 &self->tx_buff_dma, GFP_KERNEL);
557 if (self->tx_buff.head == NULL) {
558 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
559 driver_name);
560 goto err_out3;
561 }
562
563 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
564 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
565
566 self->rx_buff.in_frame = FALSE;
567 self->rx_buff.state = OUTSIDE_FRAME;
568 self->tx_buff.data = self->tx_buff.head;
569 self->rx_buff.data = self->rx_buff.head;
570
571 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
572 smsc_ircc_setup_qos(self);
573 smsc_ircc_init_chip(self);
574
575 if (ircc_transceiver > 0 &&
576 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
577 self->transceiver = ircc_transceiver;
578 else
579 smsc_ircc_probe_transceiver(self);
580
581 err = register_netdev(self->netdev);
582 if (err) {
583 IRDA_ERROR("%s, Network device registration failed!\n",
584 driver_name);
585 goto err_out4;
586 }
587
588 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
589 dev_count, NULL, 0);
590 if (IS_ERR(self->pldev)) {
591 err = PTR_ERR(self->pldev);
592 goto err_out5;
593 }
594 platform_set_drvdata(self->pldev, self);
595
596 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
597 dev_count++;
598
599 return 0;
600
601 err_out5:
602 unregister_netdev(self->netdev);
603
604 err_out4:
605 dma_free_coherent(NULL, self->tx_buff.truesize,
606 self->tx_buff.head, self->tx_buff_dma);
607 err_out3:
608 dma_free_coherent(NULL, self->rx_buff.truesize,
609 self->rx_buff.head, self->rx_buff_dma);
610 err_out2:
611 free_netdev(self->netdev);
612 dev_self[dev_count] = NULL;
613 err_out1:
614 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
615 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
616 err_out:
617 return err;
618 }
619
620 /*
621 * Function smsc_ircc_present(fir_base, sir_base)
622 *
623 * Check the smsc-ircc chip presence
624 *
625 */
626 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
627 {
628 unsigned char low, high, chip, config, dma, irq, version;
629
630 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
631 driver_name)) {
632 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
633 __func__, fir_base);
634 goto out1;
635 }
636
637 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
638 driver_name)) {
639 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
640 __func__, sir_base);
641 goto out2;
642 }
643
644 register_bank(fir_base, 3);
645
646 high = inb(fir_base + IRCC_ID_HIGH);
647 low = inb(fir_base + IRCC_ID_LOW);
648 chip = inb(fir_base + IRCC_CHIP_ID);
649 version = inb(fir_base + IRCC_VERSION);
650 config = inb(fir_base + IRCC_INTERFACE);
651 dma = config & IRCC_INTERFACE_DMA_MASK;
652 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
653
654 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
655 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
656 __func__, fir_base);
657 goto out3;
658 }
659 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
660 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
661 chip & 0x0f, version, fir_base, sir_base, dma, irq);
662
663 return 0;
664
665 out3:
666 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
667 out2:
668 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
669 out1:
670 return -ENODEV;
671 }
672
673 /*
674 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
675 *
676 * Setup I/O
677 *
678 */
679 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
680 unsigned int fir_base, unsigned int sir_base,
681 u8 dma, u8 irq)
682 {
683 unsigned char config, chip_dma, chip_irq;
684
685 register_bank(fir_base, 3);
686 config = inb(fir_base + IRCC_INTERFACE);
687 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
688 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
689
690 self->io.fir_base = fir_base;
691 self->io.sir_base = sir_base;
692 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
693 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
694 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
695 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
696
697 if (irq != IRQ_INVAL) {
698 if (irq != chip_irq)
699 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
700 driver_name, chip_irq, irq);
701 self->io.irq = irq;
702 } else
703 self->io.irq = chip_irq;
704
705 if (dma != DMA_INVAL) {
706 if (dma != chip_dma)
707 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
708 driver_name, chip_dma, dma);
709 self->io.dma = dma;
710 } else
711 self->io.dma = chip_dma;
712
713 }
714
715 /*
716 * Function smsc_ircc_setup_qos(self)
717 *
718 * Setup qos
719 *
720 */
721 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
722 {
723 /* Initialize QoS for this device */
724 irda_init_max_qos_capabilies(&self->qos);
725
726 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
727 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
728
729 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
730 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
731 irda_qos_bits_to_value(&self->qos);
732 }
733
734 /*
735 * Function smsc_ircc_init_chip(self)
736 *
737 * Init chip
738 *
739 */
740 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
741 {
742 int iobase = self->io.fir_base;
743
744 register_bank(iobase, 0);
745 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
746 outb(0x00, iobase + IRCC_MASTER);
747
748 register_bank(iobase, 1);
749 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
750 iobase + IRCC_SCE_CFGA);
751
752 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
753 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
754 iobase + IRCC_SCE_CFGB);
755 #else
756 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
757 iobase + IRCC_SCE_CFGB);
758 #endif
759 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
760 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
761
762 register_bank(iobase, 4);
763 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
764
765 register_bank(iobase, 0);
766 outb(0, iobase + IRCC_LCR_A);
767
768 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
769
770 /* Power on device */
771 outb(0x00, iobase + IRCC_MASTER);
772 }
773
774 /*
775 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
776 *
777 * Process IOCTL commands for this device
778 *
779 */
780 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
781 {
782 struct if_irda_req *irq = (struct if_irda_req *) rq;
783 struct smsc_ircc_cb *self;
784 unsigned long flags;
785 int ret = 0;
786
787 IRDA_ASSERT(dev != NULL, return -1;);
788
789 self = netdev_priv(dev);
790
791 IRDA_ASSERT(self != NULL, return -1;);
792
793 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
794
795 switch (cmd) {
796 case SIOCSBANDWIDTH: /* Set bandwidth */
797 if (!capable(CAP_NET_ADMIN))
798 ret = -EPERM;
799 else {
800 /* Make sure we are the only one touching
801 * self->io.speed and the hardware - Jean II */
802 spin_lock_irqsave(&self->lock, flags);
803 smsc_ircc_change_speed(self, irq->ifr_baudrate);
804 spin_unlock_irqrestore(&self->lock, flags);
805 }
806 break;
807 case SIOCSMEDIABUSY: /* Set media busy */
808 if (!capable(CAP_NET_ADMIN)) {
809 ret = -EPERM;
810 break;
811 }
812
813 irda_device_set_media_busy(self->netdev, TRUE);
814 break;
815 case SIOCGRECEIVING: /* Check if we are receiving right now */
816 irq->ifr_receiving = smsc_ircc_is_receiving(self);
817 break;
818 #if 0
819 case SIOCSDTRRTS:
820 if (!capable(CAP_NET_ADMIN)) {
821 ret = -EPERM;
822 break;
823 }
824 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
825 break;
826 #endif
827 default:
828 ret = -EOPNOTSUPP;
829 }
830
831 return ret;
832 }
833
834 #if SMSC_IRCC2_C_NET_TIMEOUT
835 /*
836 * Function smsc_ircc_timeout (struct net_device *dev)
837 *
838 * The networking timeout management.
839 *
840 */
841
842 static void smsc_ircc_timeout(struct net_device *dev)
843 {
844 struct smsc_ircc_cb *self = netdev_priv(dev);
845 unsigned long flags;
846
847 IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
848 dev->name, self->io.speed);
849 spin_lock_irqsave(&self->lock, flags);
850 smsc_ircc_sir_start(self);
851 smsc_ircc_change_speed(self, self->io.speed);
852 dev->trans_start = jiffies;
853 netif_wake_queue(dev);
854 spin_unlock_irqrestore(&self->lock, flags);
855 }
856 #endif
857
858 /*
859 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
860 *
861 * Transmits the current frame until FIFO is full, then
862 * waits until the next transmit interrupt, and continues until the
863 * frame is transmitted.
864 */
865 static int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
866 {
867 struct smsc_ircc_cb *self;
868 unsigned long flags;
869 s32 speed;
870
871 IRDA_DEBUG(1, "%s\n", __func__);
872
873 IRDA_ASSERT(dev != NULL, return 0;);
874
875 self = netdev_priv(dev);
876 IRDA_ASSERT(self != NULL, return 0;);
877
878 netif_stop_queue(dev);
879
880 /* Make sure test of self->io.speed & speed change are atomic */
881 spin_lock_irqsave(&self->lock, flags);
882
883 /* Check if we need to change the speed */
884 speed = irda_get_next_speed(skb);
885 if (speed != self->io.speed && speed != -1) {
886 /* Check for empty frame */
887 if (!skb->len) {
888 /*
889 * We send frames one by one in SIR mode (no
890 * pipelining), so at this point, if we were sending
891 * a previous frame, we just received the interrupt
892 * telling us it is finished (UART_IIR_THRI).
893 * Therefore, waiting for the transmitter to really
894 * finish draining the fifo won't take too long.
895 * And the interrupt handler is not expected to run.
896 * - Jean II */
897 smsc_ircc_sir_wait_hw_transmitter_finish(self);
898 smsc_ircc_change_speed(self, speed);
899 spin_unlock_irqrestore(&self->lock, flags);
900 dev_kfree_skb(skb);
901 return 0;
902 }
903 self->new_speed = speed;
904 }
905
906 /* Init tx buffer */
907 self->tx_buff.data = self->tx_buff.head;
908
909 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
910 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
911 self->tx_buff.truesize);
912
913 dev->stats.tx_bytes += self->tx_buff.len;
914
915 /* Turn on transmit finished interrupt. Will fire immediately! */
916 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
917
918 spin_unlock_irqrestore(&self->lock, flags);
919
920 dev_kfree_skb(skb);
921
922 return 0;
923 }
924
925 /*
926 * Function smsc_ircc_set_fir_speed (self, baud)
927 *
928 * Change the speed of the device
929 *
930 */
931 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
932 {
933 int fir_base, ir_mode, ctrl, fast;
934
935 IRDA_ASSERT(self != NULL, return;);
936 fir_base = self->io.fir_base;
937
938 self->io.speed = speed;
939
940 switch (speed) {
941 default:
942 case 576000:
943 ir_mode = IRCC_CFGA_IRDA_HDLC;
944 ctrl = IRCC_CRC;
945 fast = 0;
946 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
947 break;
948 case 1152000:
949 ir_mode = IRCC_CFGA_IRDA_HDLC;
950 ctrl = IRCC_1152 | IRCC_CRC;
951 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
952 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
953 __func__);
954 break;
955 case 4000000:
956 ir_mode = IRCC_CFGA_IRDA_4PPM;
957 ctrl = IRCC_CRC;
958 fast = IRCC_LCR_A_FAST;
959 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
960 __func__);
961 break;
962 }
963 #if 0
964 Now in tranceiver!
965 /* This causes an interrupt */
966 register_bank(fir_base, 0);
967 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
968 #endif
969
970 register_bank(fir_base, 1);
971 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
972
973 register_bank(fir_base, 4);
974 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
975 }
976
977 /*
978 * Function smsc_ircc_fir_start(self)
979 *
980 * Change the speed of the device
981 *
982 */
983 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
984 {
985 struct net_device *dev;
986 int fir_base;
987
988 IRDA_DEBUG(1, "%s\n", __func__);
989
990 IRDA_ASSERT(self != NULL, return;);
991 dev = self->netdev;
992 IRDA_ASSERT(dev != NULL, return;);
993
994 fir_base = self->io.fir_base;
995
996 /* Reset everything */
997
998 /* Install FIR transmit handler */
999 dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
1000
1001 /* Clear FIFO */
1002 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
1003
1004 /* Enable interrupt */
1005 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
1006
1007 register_bank(fir_base, 1);
1008
1009 /* Select the TX/RX interface */
1010 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
1011 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
1012 fir_base + IRCC_SCE_CFGB);
1013 #else
1014 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
1015 fir_base + IRCC_SCE_CFGB);
1016 #endif
1017 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
1018
1019 /* Enable SCE interrupts */
1020 outb(0, fir_base + IRCC_MASTER);
1021 register_bank(fir_base, 0);
1022 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
1023 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
1024 }
1025
1026 /*
1027 * Function smsc_ircc_fir_stop(self, baud)
1028 *
1029 * Change the speed of the device
1030 *
1031 */
1032 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
1033 {
1034 int fir_base;
1035
1036 IRDA_DEBUG(1, "%s\n", __func__);
1037
1038 IRDA_ASSERT(self != NULL, return;);
1039
1040 fir_base = self->io.fir_base;
1041 register_bank(fir_base, 0);
1042 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
1043 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
1044 }
1045
1046
1047 /*
1048 * Function smsc_ircc_change_speed(self, baud)
1049 *
1050 * Change the speed of the device
1051 *
1052 * This function *must* be called with spinlock held, because it may
1053 * be called from the irq handler. - Jean II
1054 */
1055 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
1056 {
1057 struct net_device *dev;
1058 int last_speed_was_sir;
1059
1060 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __func__, speed);
1061
1062 IRDA_ASSERT(self != NULL, return;);
1063 dev = self->netdev;
1064
1065 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
1066
1067 #if 0
1068 /* Temp Hack */
1069 speed= 1152000;
1070 self->io.speed = speed;
1071 last_speed_was_sir = 0;
1072 smsc_ircc_fir_start(self);
1073 #endif
1074
1075 if (self->io.speed == 0)
1076 smsc_ircc_sir_start(self);
1077
1078 #if 0
1079 if (!last_speed_was_sir) speed = self->io.speed;
1080 #endif
1081
1082 if (self->io.speed != speed)
1083 smsc_ircc_set_transceiver_for_speed(self, speed);
1084
1085 self->io.speed = speed;
1086
1087 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1088 if (!last_speed_was_sir) {
1089 smsc_ircc_fir_stop(self);
1090 smsc_ircc_sir_start(self);
1091 }
1092 smsc_ircc_set_sir_speed(self, speed);
1093 } else {
1094 if (last_speed_was_sir) {
1095 #if SMSC_IRCC2_C_SIR_STOP
1096 smsc_ircc_sir_stop(self);
1097 #endif
1098 smsc_ircc_fir_start(self);
1099 }
1100 smsc_ircc_set_fir_speed(self, speed);
1101
1102 #if 0
1103 self->tx_buff.len = 10;
1104 self->tx_buff.data = self->tx_buff.head;
1105
1106 smsc_ircc_dma_xmit(self, 4000);
1107 #endif
1108 /* Be ready for incoming frames */
1109 smsc_ircc_dma_receive(self);
1110 }
1111
1112 netif_wake_queue(dev);
1113 }
1114
1115 /*
1116 * Function smsc_ircc_set_sir_speed (self, speed)
1117 *
1118 * Set speed of IrDA port to specified baudrate
1119 *
1120 */
1121 static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1122 {
1123 int iobase;
1124 int fcr; /* FIFO control reg */
1125 int lcr; /* Line control reg */
1126 int divisor;
1127
1128 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __func__, speed);
1129
1130 IRDA_ASSERT(self != NULL, return;);
1131 iobase = self->io.sir_base;
1132
1133 /* Update accounting for new speed */
1134 self->io.speed = speed;
1135
1136 /* Turn off interrupts */
1137 outb(0, iobase + UART_IER);
1138
1139 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1140
1141 fcr = UART_FCR_ENABLE_FIFO;
1142
1143 /*
1144 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1145 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1146 * about this timeout since it will always be fast enough.
1147 */
1148 fcr |= self->io.speed < 38400 ?
1149 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1150
1151 /* IrDA ports use 8N1 */
1152 lcr = UART_LCR_WLEN8;
1153
1154 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1155 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1156 outb(divisor >> 8, iobase + UART_DLM);
1157 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1158 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1159
1160 /* Turn on interrups */
1161 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1162
1163 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __func__, speed);
1164 }
1165
1166
1167 /*
1168 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1169 *
1170 * Transmit the frame!
1171 *
1172 */
1173 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1174 {
1175 struct smsc_ircc_cb *self;
1176 unsigned long flags;
1177 s32 speed;
1178 int mtt;
1179
1180 IRDA_ASSERT(dev != NULL, return 0;);
1181 self = netdev_priv(dev);
1182 IRDA_ASSERT(self != NULL, return 0;);
1183
1184 netif_stop_queue(dev);
1185
1186 /* Make sure test of self->io.speed & speed change are atomic */
1187 spin_lock_irqsave(&self->lock, flags);
1188
1189 /* Check if we need to change the speed after this frame */
1190 speed = irda_get_next_speed(skb);
1191 if (speed != self->io.speed && speed != -1) {
1192 /* Check for empty frame */
1193 if (!skb->len) {
1194 /* Note : you should make sure that speed changes
1195 * are not going to corrupt any outgoing frame.
1196 * Look at nsc-ircc for the gory details - Jean II */
1197 smsc_ircc_change_speed(self, speed);
1198 spin_unlock_irqrestore(&self->lock, flags);
1199 dev_kfree_skb(skb);
1200 return 0;
1201 }
1202
1203 self->new_speed = speed;
1204 }
1205
1206 skb_copy_from_linear_data(skb, self->tx_buff.head, skb->len);
1207
1208 self->tx_buff.len = skb->len;
1209 self->tx_buff.data = self->tx_buff.head;
1210
1211 mtt = irda_get_mtt(skb);
1212 if (mtt) {
1213 int bofs;
1214
1215 /*
1216 * Compute how many BOFs (STA or PA's) we need to waste the
1217 * min turn time given the speed of the link.
1218 */
1219 bofs = mtt * (self->io.speed / 1000) / 8000;
1220 if (bofs > 4095)
1221 bofs = 4095;
1222
1223 smsc_ircc_dma_xmit(self, bofs);
1224 } else {
1225 /* Transmit frame */
1226 smsc_ircc_dma_xmit(self, 0);
1227 }
1228
1229 spin_unlock_irqrestore(&self->lock, flags);
1230 dev_kfree_skb(skb);
1231
1232 return 0;
1233 }
1234
1235 /*
1236 * Function smsc_ircc_dma_xmit (self, bofs)
1237 *
1238 * Transmit data using DMA
1239 *
1240 */
1241 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1242 {
1243 int iobase = self->io.fir_base;
1244 u8 ctrl;
1245
1246 IRDA_DEBUG(3, "%s\n", __func__);
1247 #if 1
1248 /* Disable Rx */
1249 register_bank(iobase, 0);
1250 outb(0x00, iobase + IRCC_LCR_B);
1251 #endif
1252 register_bank(iobase, 1);
1253 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1254 iobase + IRCC_SCE_CFGB);
1255
1256 self->io.direction = IO_XMIT;
1257
1258 /* Set BOF additional count for generating the min turn time */
1259 register_bank(iobase, 4);
1260 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1261 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1262 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1263
1264 /* Set max Tx frame size */
1265 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1266 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1267
1268 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1269
1270 /* Enable burst mode chip Tx DMA */
1271 register_bank(iobase, 1);
1272 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1273 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1274
1275 /* Setup DMA controller (must be done after enabling chip DMA) */
1276 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1277 DMA_TX_MODE);
1278
1279 /* Enable interrupt */
1280
1281 register_bank(iobase, 0);
1282 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1283 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1284
1285 /* Enable transmit */
1286 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1287 }
1288
1289 /*
1290 * Function smsc_ircc_dma_xmit_complete (self)
1291 *
1292 * The transfer of a frame in finished. This function will only be called
1293 * by the interrupt handler
1294 *
1295 */
1296 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1297 {
1298 int iobase = self->io.fir_base;
1299
1300 IRDA_DEBUG(3, "%s\n", __func__);
1301 #if 0
1302 /* Disable Tx */
1303 register_bank(iobase, 0);
1304 outb(0x00, iobase + IRCC_LCR_B);
1305 #endif
1306 register_bank(iobase, 1);
1307 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1308 iobase + IRCC_SCE_CFGB);
1309
1310 /* Check for underrun! */
1311 register_bank(iobase, 0);
1312 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1313 self->netdev->stats.tx_errors++;
1314 self->netdev->stats.tx_fifo_errors++;
1315
1316 /* Reset error condition */
1317 register_bank(iobase, 0);
1318 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1319 outb(0x00, iobase + IRCC_MASTER);
1320 } else {
1321 self->netdev->stats.tx_packets++;
1322 self->netdev->stats.tx_bytes += self->tx_buff.len;
1323 }
1324
1325 /* Check if it's time to change the speed */
1326 if (self->new_speed) {
1327 smsc_ircc_change_speed(self, self->new_speed);
1328 self->new_speed = 0;
1329 }
1330
1331 netif_wake_queue(self->netdev);
1332 }
1333
1334 /*
1335 * Function smsc_ircc_dma_receive(self)
1336 *
1337 * Get ready for receiving a frame. The device will initiate a DMA
1338 * if it starts to receive a frame.
1339 *
1340 */
1341 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1342 {
1343 int iobase = self->io.fir_base;
1344 #if 0
1345 /* Turn off chip DMA */
1346 register_bank(iobase, 1);
1347 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1348 iobase + IRCC_SCE_CFGB);
1349 #endif
1350
1351 /* Disable Tx */
1352 register_bank(iobase, 0);
1353 outb(0x00, iobase + IRCC_LCR_B);
1354
1355 /* Turn off chip DMA */
1356 register_bank(iobase, 1);
1357 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1358 iobase + IRCC_SCE_CFGB);
1359
1360 self->io.direction = IO_RECV;
1361 self->rx_buff.data = self->rx_buff.head;
1362
1363 /* Set max Rx frame size */
1364 register_bank(iobase, 4);
1365 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1366 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1367
1368 /* Setup DMA controller */
1369 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1370 DMA_RX_MODE);
1371
1372 /* Enable burst mode chip Rx DMA */
1373 register_bank(iobase, 1);
1374 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1375 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1376
1377 /* Enable interrupt */
1378 register_bank(iobase, 0);
1379 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1380 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1381
1382 /* Enable receiver */
1383 register_bank(iobase, 0);
1384 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1385 iobase + IRCC_LCR_B);
1386
1387 return 0;
1388 }
1389
1390 /*
1391 * Function smsc_ircc_dma_receive_complete(self)
1392 *
1393 * Finished with receiving frames
1394 *
1395 */
1396 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1397 {
1398 struct sk_buff *skb;
1399 int len, msgcnt, lsr;
1400 int iobase = self->io.fir_base;
1401
1402 register_bank(iobase, 0);
1403
1404 IRDA_DEBUG(3, "%s\n", __func__);
1405 #if 0
1406 /* Disable Rx */
1407 register_bank(iobase, 0);
1408 outb(0x00, iobase + IRCC_LCR_B);
1409 #endif
1410 register_bank(iobase, 0);
1411 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1412 lsr= inb(iobase + IRCC_LSR);
1413 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1414
1415 IRDA_DEBUG(2, "%s: dma count = %d\n", __func__,
1416 get_dma_residue(self->io.dma));
1417
1418 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1419
1420 /* Look for errors */
1421 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1422 self->netdev->stats.rx_errors++;
1423 if (lsr & IRCC_LSR_FRAME_ERROR)
1424 self->netdev->stats.rx_frame_errors++;
1425 if (lsr & IRCC_LSR_CRC_ERROR)
1426 self->netdev->stats.rx_crc_errors++;
1427 if (lsr & IRCC_LSR_SIZE_ERROR)
1428 self->netdev->stats.rx_length_errors++;
1429 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1430 self->netdev->stats.rx_length_errors++;
1431 return;
1432 }
1433
1434 /* Remove CRC */
1435 len -= self->io.speed < 4000000 ? 2 : 4;
1436
1437 if (len < 2 || len > 2050) {
1438 IRDA_WARNING("%s(), bogus len=%d\n", __func__, len);
1439 return;
1440 }
1441 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __func__, msgcnt, len);
1442
1443 skb = dev_alloc_skb(len + 1);
1444 if (!skb) {
1445 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1446 __func__);
1447 return;
1448 }
1449 /* Make sure IP header gets aligned */
1450 skb_reserve(skb, 1);
1451
1452 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1453 self->netdev->stats.rx_packets++;
1454 self->netdev->stats.rx_bytes += len;
1455
1456 skb->dev = self->netdev;
1457 skb_reset_mac_header(skb);
1458 skb->protocol = htons(ETH_P_IRDA);
1459 netif_rx(skb);
1460 }
1461
1462 /*
1463 * Function smsc_ircc_sir_receive (self)
1464 *
1465 * Receive one frame from the infrared port
1466 *
1467 */
1468 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1469 {
1470 int boguscount = 0;
1471 int iobase;
1472
1473 IRDA_ASSERT(self != NULL, return;);
1474
1475 iobase = self->io.sir_base;
1476
1477 /*
1478 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1479 * async_unwrap_char will deliver all found frames
1480 */
1481 do {
1482 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
1483 inb(iobase + UART_RX));
1484
1485 /* Make sure we don't stay here to long */
1486 if (boguscount++ > 32) {
1487 IRDA_DEBUG(2, "%s(), breaking!\n", __func__);
1488 break;
1489 }
1490 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1491 }
1492
1493
1494 /*
1495 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1496 *
1497 * An interrupt from the chip has arrived. Time to do some work
1498 *
1499 */
1500 static irqreturn_t smsc_ircc_interrupt(int dummy, void *dev_id)
1501 {
1502 struct net_device *dev = dev_id;
1503 struct smsc_ircc_cb *self = netdev_priv(dev);
1504 int iobase, iir, lcra, lsr;
1505 irqreturn_t ret = IRQ_NONE;
1506
1507 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1508 spin_lock(&self->lock);
1509
1510 /* Check if we should use the SIR interrupt handler */
1511 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1512 ret = smsc_ircc_interrupt_sir(dev);
1513 goto irq_ret_unlock;
1514 }
1515
1516 iobase = self->io.fir_base;
1517
1518 register_bank(iobase, 0);
1519 iir = inb(iobase + IRCC_IIR);
1520 if (iir == 0)
1521 goto irq_ret_unlock;
1522 ret = IRQ_HANDLED;
1523
1524 /* Disable interrupts */
1525 outb(0, iobase + IRCC_IER);
1526 lcra = inb(iobase + IRCC_LCR_A);
1527 lsr = inb(iobase + IRCC_LSR);
1528
1529 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __func__, iir);
1530
1531 if (iir & IRCC_IIR_EOM) {
1532 if (self->io.direction == IO_RECV)
1533 smsc_ircc_dma_receive_complete(self);
1534 else
1535 smsc_ircc_dma_xmit_complete(self);
1536
1537 smsc_ircc_dma_receive(self);
1538 }
1539
1540 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1541 /*printk(KERN_WARNING "%s(): Active Frame\n", __func__);*/
1542 }
1543
1544 /* Enable interrupts again */
1545
1546 register_bank(iobase, 0);
1547 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1548
1549 irq_ret_unlock:
1550 spin_unlock(&self->lock);
1551
1552 return ret;
1553 }
1554
1555 /*
1556 * Function irport_interrupt_sir (irq, dev_id)
1557 *
1558 * Interrupt handler for SIR modes
1559 */
1560 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1561 {
1562 struct smsc_ircc_cb *self = netdev_priv(dev);
1563 int boguscount = 0;
1564 int iobase;
1565 int iir, lsr;
1566
1567 /* Already locked comming here in smsc_ircc_interrupt() */
1568 /*spin_lock(&self->lock);*/
1569
1570 iobase = self->io.sir_base;
1571
1572 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1573 if (iir == 0)
1574 return IRQ_NONE;
1575 while (iir) {
1576 /* Clear interrupt */
1577 lsr = inb(iobase + UART_LSR);
1578
1579 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1580 __func__, iir, lsr, iobase);
1581
1582 switch (iir) {
1583 case UART_IIR_RLSI:
1584 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
1585 break;
1586 case UART_IIR_RDI:
1587 /* Receive interrupt */
1588 smsc_ircc_sir_receive(self);
1589 break;
1590 case UART_IIR_THRI:
1591 if (lsr & UART_LSR_THRE)
1592 /* Transmitter ready for data */
1593 smsc_ircc_sir_write_wakeup(self);
1594 break;
1595 default:
1596 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1597 __func__, iir);
1598 break;
1599 }
1600
1601 /* Make sure we don't stay here to long */
1602 if (boguscount++ > 100)
1603 break;
1604
1605 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1606 }
1607 /*spin_unlock(&self->lock);*/
1608 return IRQ_HANDLED;
1609 }
1610
1611
1612 #if 0 /* unused */
1613 /*
1614 * Function ircc_is_receiving (self)
1615 *
1616 * Return TRUE is we are currently receiving a frame
1617 *
1618 */
1619 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1620 {
1621 int status = FALSE;
1622 /* int iobase; */
1623
1624 IRDA_DEBUG(1, "%s\n", __func__);
1625
1626 IRDA_ASSERT(self != NULL, return FALSE;);
1627
1628 IRDA_DEBUG(0, "%s: dma count = %d\n", __func__,
1629 get_dma_residue(self->io.dma));
1630
1631 status = (self->rx_buff.state != OUTSIDE_FRAME);
1632
1633 return status;
1634 }
1635 #endif /* unused */
1636
1637 static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1638 {
1639 int error;
1640
1641 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1642 self->netdev->name, self->netdev);
1643 if (error)
1644 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1645 __func__, self->io.irq, error);
1646
1647 return error;
1648 }
1649
1650 static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1651 {
1652 unsigned long flags;
1653
1654 spin_lock_irqsave(&self->lock, flags);
1655
1656 self->io.speed = 0;
1657 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1658
1659 spin_unlock_irqrestore(&self->lock, flags);
1660 }
1661
1662 static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1663 {
1664 int iobase = self->io.fir_base;
1665 unsigned long flags;
1666
1667 spin_lock_irqsave(&self->lock, flags);
1668
1669 register_bank(iobase, 0);
1670 outb(0, iobase + IRCC_IER);
1671 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1672 outb(0x00, iobase + IRCC_MASTER);
1673
1674 spin_unlock_irqrestore(&self->lock, flags);
1675 }
1676
1677
1678 /*
1679 * Function smsc_ircc_net_open (dev)
1680 *
1681 * Start the device
1682 *
1683 */
1684 static int smsc_ircc_net_open(struct net_device *dev)
1685 {
1686 struct smsc_ircc_cb *self;
1687 char hwname[16];
1688
1689 IRDA_DEBUG(1, "%s\n", __func__);
1690
1691 IRDA_ASSERT(dev != NULL, return -1;);
1692 self = netdev_priv(dev);
1693 IRDA_ASSERT(self != NULL, return 0;);
1694
1695 if (self->io.suspended) {
1696 IRDA_DEBUG(0, "%s(), device is suspended\n", __func__);
1697 return -EAGAIN;
1698 }
1699
1700 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1701 (void *) dev)) {
1702 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1703 __func__, self->io.irq);
1704 return -EAGAIN;
1705 }
1706
1707 smsc_ircc_start_interrupts(self);
1708
1709 /* Give self a hardware name */
1710 /* It would be cool to offer the chip revision here - Jean II */
1711 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1712
1713 /*
1714 * Open new IrLAP layer instance, now that everything should be
1715 * initialized properly
1716 */
1717 self->irlap = irlap_open(dev, &self->qos, hwname);
1718
1719 /*
1720 * Always allocate the DMA channel after the IRQ,
1721 * and clean up on failure.
1722 */
1723 if (request_dma(self->io.dma, dev->name)) {
1724 smsc_ircc_net_close(dev);
1725
1726 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1727 __func__, self->io.dma);
1728 return -EAGAIN;
1729 }
1730
1731 netif_start_queue(dev);
1732
1733 return 0;
1734 }
1735
1736 /*
1737 * Function smsc_ircc_net_close (dev)
1738 *
1739 * Stop the device
1740 *
1741 */
1742 static int smsc_ircc_net_close(struct net_device *dev)
1743 {
1744 struct smsc_ircc_cb *self;
1745
1746 IRDA_DEBUG(1, "%s\n", __func__);
1747
1748 IRDA_ASSERT(dev != NULL, return -1;);
1749 self = netdev_priv(dev);
1750 IRDA_ASSERT(self != NULL, return 0;);
1751
1752 /* Stop device */
1753 netif_stop_queue(dev);
1754
1755 /* Stop and remove instance of IrLAP */
1756 if (self->irlap)
1757 irlap_close(self->irlap);
1758 self->irlap = NULL;
1759
1760 smsc_ircc_stop_interrupts(self);
1761
1762 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1763 if (!self->io.suspended)
1764 free_irq(self->io.irq, dev);
1765
1766 disable_dma(self->io.dma);
1767 free_dma(self->io.dma);
1768
1769 return 0;
1770 }
1771
1772 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
1773 {
1774 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1775
1776 if (!self->io.suspended) {
1777 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1778
1779 rtnl_lock();
1780 if (netif_running(self->netdev)) {
1781 netif_device_detach(self->netdev);
1782 smsc_ircc_stop_interrupts(self);
1783 free_irq(self->io.irq, self->netdev);
1784 disable_dma(self->io.dma);
1785 }
1786 self->io.suspended = 1;
1787 rtnl_unlock();
1788 }
1789
1790 return 0;
1791 }
1792
1793 static int smsc_ircc_resume(struct platform_device *dev)
1794 {
1795 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1796
1797 if (self->io.suspended) {
1798 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1799
1800 rtnl_lock();
1801 smsc_ircc_init_chip(self);
1802 if (netif_running(self->netdev)) {
1803 if (smsc_ircc_request_irq(self)) {
1804 /*
1805 * Don't fail resume process, just kill this
1806 * network interface
1807 */
1808 unregister_netdevice(self->netdev);
1809 } else {
1810 enable_dma(self->io.dma);
1811 smsc_ircc_start_interrupts(self);
1812 netif_device_attach(self->netdev);
1813 }
1814 }
1815 self->io.suspended = 0;
1816 rtnl_unlock();
1817 }
1818 return 0;
1819 }
1820
1821 /*
1822 * Function smsc_ircc_close (self)
1823 *
1824 * Close driver instance
1825 *
1826 */
1827 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1828 {
1829 IRDA_DEBUG(1, "%s\n", __func__);
1830
1831 IRDA_ASSERT(self != NULL, return -1;);
1832
1833 platform_device_unregister(self->pldev);
1834
1835 /* Remove netdevice */
1836 unregister_netdev(self->netdev);
1837
1838 smsc_ircc_stop_interrupts(self);
1839
1840 /* Release the PORTS that this driver is using */
1841 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1842 self->io.fir_base);
1843
1844 release_region(self->io.fir_base, self->io.fir_ext);
1845
1846 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1847 self->io.sir_base);
1848
1849 release_region(self->io.sir_base, self->io.sir_ext);
1850
1851 if (self->tx_buff.head)
1852 dma_free_coherent(NULL, self->tx_buff.truesize,
1853 self->tx_buff.head, self->tx_buff_dma);
1854
1855 if (self->rx_buff.head)
1856 dma_free_coherent(NULL, self->rx_buff.truesize,
1857 self->rx_buff.head, self->rx_buff_dma);
1858
1859 free_netdev(self->netdev);
1860
1861 return 0;
1862 }
1863
1864 static void __exit smsc_ircc_cleanup(void)
1865 {
1866 int i;
1867
1868 IRDA_DEBUG(1, "%s\n", __func__);
1869
1870 for (i = 0; i < 2; i++) {
1871 if (dev_self[i])
1872 smsc_ircc_close(dev_self[i]);
1873 }
1874
1875 if (pnp_driver_registered)
1876 pnp_unregister_driver(&smsc_ircc_pnp_driver);
1877
1878 platform_driver_unregister(&smsc_ircc_driver);
1879 }
1880
1881 /*
1882 * Start SIR operations
1883 *
1884 * This function *must* be called with spinlock held, because it may
1885 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1886 */
1887 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1888 {
1889 struct net_device *dev;
1890 int fir_base, sir_base;
1891
1892 IRDA_DEBUG(3, "%s\n", __func__);
1893
1894 IRDA_ASSERT(self != NULL, return;);
1895 dev = self->netdev;
1896 IRDA_ASSERT(dev != NULL, return;);
1897 dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
1898
1899 fir_base = self->io.fir_base;
1900 sir_base = self->io.sir_base;
1901
1902 /* Reset everything */
1903 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1904
1905 #if SMSC_IRCC2_C_SIR_STOP
1906 /*smsc_ircc_sir_stop(self);*/
1907 #endif
1908
1909 register_bank(fir_base, 1);
1910 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1911
1912 /* Initialize UART */
1913 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1914 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1915
1916 /* Turn on interrups */
1917 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1918
1919 IRDA_DEBUG(3, "%s() - exit\n", __func__);
1920
1921 outb(0x00, fir_base + IRCC_MASTER);
1922 }
1923
1924 #if SMSC_IRCC2_C_SIR_STOP
1925 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1926 {
1927 int iobase;
1928
1929 IRDA_DEBUG(3, "%s\n", __func__);
1930 iobase = self->io.sir_base;
1931
1932 /* Reset UART */
1933 outb(0, iobase + UART_MCR);
1934
1935 /* Turn off interrupts */
1936 outb(0, iobase + UART_IER);
1937 }
1938 #endif
1939
1940 /*
1941 * Function smsc_sir_write_wakeup (self)
1942 *
1943 * Called by the SIR interrupt handler when there's room for more data.
1944 * If we have more packets to send, we send them here.
1945 *
1946 */
1947 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1948 {
1949 int actual = 0;
1950 int iobase;
1951 int fcr;
1952
1953 IRDA_ASSERT(self != NULL, return;);
1954
1955 IRDA_DEBUG(4, "%s\n", __func__);
1956
1957 iobase = self->io.sir_base;
1958
1959 /* Finished with frame? */
1960 if (self->tx_buff.len > 0) {
1961 /* Write data left in transmit buffer */
1962 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1963 self->tx_buff.data, self->tx_buff.len);
1964 self->tx_buff.data += actual;
1965 self->tx_buff.len -= actual;
1966 } else {
1967
1968 /*if (self->tx_buff.len ==0) {*/
1969
1970 /*
1971 * Now serial buffer is almost free & we can start
1972 * transmission of another packet. But first we must check
1973 * if we need to change the speed of the hardware
1974 */
1975 if (self->new_speed) {
1976 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1977 __func__, self->new_speed);
1978 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1979 smsc_ircc_change_speed(self, self->new_speed);
1980 self->new_speed = 0;
1981 } else {
1982 /* Tell network layer that we want more frames */
1983 netif_wake_queue(self->netdev);
1984 }
1985 self->netdev->stats.tx_packets++;
1986
1987 if (self->io.speed <= 115200) {
1988 /*
1989 * Reset Rx FIFO to make sure that all reflected transmit data
1990 * is discarded. This is needed for half duplex operation
1991 */
1992 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
1993 fcr |= self->io.speed < 38400 ?
1994 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1995
1996 outb(fcr, iobase + UART_FCR);
1997
1998 /* Turn on receive interrupts */
1999 outb(UART_IER_RDI, iobase + UART_IER);
2000 }
2001 }
2002 }
2003
2004 /*
2005 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
2006 *
2007 * Fill Tx FIFO with transmit data
2008 *
2009 */
2010 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
2011 {
2012 int actual = 0;
2013
2014 /* Tx FIFO should be empty! */
2015 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
2016 IRDA_WARNING("%s(), failed, fifo not empty!\n", __func__);
2017 return 0;
2018 }
2019
2020 /* Fill FIFO with current frame */
2021 while (fifo_size-- > 0 && actual < len) {
2022 /* Transmit next byte */
2023 outb(buf[actual], iobase + UART_TX);
2024 actual++;
2025 }
2026 return actual;
2027 }
2028
2029 /*
2030 * Function smsc_ircc_is_receiving (self)
2031 *
2032 * Returns true is we are currently receiving data
2033 *
2034 */
2035 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
2036 {
2037 return (self->rx_buff.state != OUTSIDE_FRAME);
2038 }
2039
2040
2041 /*
2042 * Function smsc_ircc_probe_transceiver(self)
2043 *
2044 * Tries to find the used Transceiver
2045 *
2046 */
2047 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
2048 {
2049 unsigned int i;
2050
2051 IRDA_ASSERT(self != NULL, return;);
2052
2053 for (i = 0; smsc_transceivers[i].name != NULL; i++)
2054 if (smsc_transceivers[i].probe(self->io.fir_base)) {
2055 IRDA_MESSAGE(" %s transceiver found\n",
2056 smsc_transceivers[i].name);
2057 self->transceiver= i + 1;
2058 return;
2059 }
2060
2061 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
2062 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
2063
2064 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
2065 }
2066
2067
2068 /*
2069 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
2070 *
2071 * Set the transceiver according to the speed
2072 *
2073 */
2074 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
2075 {
2076 unsigned int trx;
2077
2078 trx = self->transceiver;
2079 if (trx > 0)
2080 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
2081 }
2082
2083 /*
2084 * Function smsc_ircc_wait_hw_transmitter_finish ()
2085 *
2086 * Wait for the real end of HW transmission
2087 *
2088 * The UART is a strict FIFO, and we get called only when we have finished
2089 * pushing data to the FIFO, so the maximum amount of time we must wait
2090 * is only for the FIFO to drain out.
2091 *
2092 * We use a simple calibrated loop. We may need to adjust the loop
2093 * delay (udelay) to balance I/O traffic and latency. And we also need to
2094 * adjust the maximum timeout.
2095 * It would probably be better to wait for the proper interrupt,
2096 * but it doesn't seem to be available.
2097 *
2098 * We can't use jiffies or kernel timers because :
2099 * 1) We are called from the interrupt handler, which disable softirqs,
2100 * so jiffies won't be increased
2101 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2102 * want to wait that long to detect stuck hardware.
2103 * Jean II
2104 */
2105
2106 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2107 {
2108 int iobase = self->io.sir_base;
2109 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2110
2111 /* Calibrated busy loop */
2112 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2113 udelay(1);
2114
2115 if (count == 0)
2116 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __func__);
2117 }
2118
2119
2120 /* PROBING
2121 *
2122 * REVISIT we can be told about the device by PNP, and should use that info
2123 * instead of probing hardware and creating a platform_device ...
2124 */
2125
2126 static int __init smsc_ircc_look_for_chips(void)
2127 {
2128 struct smsc_chip_address *address;
2129 char *type;
2130 unsigned int cfg_base, found;
2131
2132 found = 0;
2133 address = possible_addresses;
2134
2135 while (address->cfg_base) {
2136 cfg_base = address->cfg_base;
2137
2138 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __func__, cfg_base, address->type);*/
2139
2140 if (address->type & SMSCSIO_TYPE_FDC) {
2141 type = "FDC";
2142 if (address->type & SMSCSIO_TYPE_FLAT)
2143 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2144 found++;
2145
2146 if (address->type & SMSCSIO_TYPE_PAGED)
2147 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2148 found++;
2149 }
2150 if (address->type & SMSCSIO_TYPE_LPC) {
2151 type = "LPC";
2152 if (address->type & SMSCSIO_TYPE_FLAT)
2153 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2154 found++;
2155
2156 if (address->type & SMSCSIO_TYPE_PAGED)
2157 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2158 found++;
2159 }
2160 address++;
2161 }
2162 return found;
2163 }
2164
2165 /*
2166 * Function smsc_superio_flat (chip, base, type)
2167 *
2168 * Try to get configuration of a smc SuperIO chip with flat register model
2169 *
2170 */
2171 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2172 {
2173 unsigned short firbase, sirbase;
2174 u8 mode, dma, irq;
2175 int ret = -ENODEV;
2176
2177 IRDA_DEBUG(1, "%s\n", __func__);
2178
2179 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2180 return ret;
2181
2182 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2183 mode = inb(cfgbase + 1);
2184
2185 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __func__, mode);*/
2186
2187 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2188 IRDA_WARNING("%s(): IrDA not enabled\n", __func__);
2189
2190 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2191 sirbase = inb(cfgbase + 1) << 2;
2192
2193 /* FIR iobase */
2194 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2195 firbase = inb(cfgbase + 1) << 3;
2196
2197 /* DMA */
2198 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2199 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2200
2201 /* IRQ */
2202 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2203 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2204
2205 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __func__, firbase, sirbase, dma, irq, mode);
2206
2207 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2208 ret = 0;
2209
2210 /* Exit configuration */
2211 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2212
2213 return ret;
2214 }
2215
2216 /*
2217 * Function smsc_superio_paged (chip, base, type)
2218 *
2219 * Try to get configuration of a smc SuperIO chip with paged register model
2220 *
2221 */
2222 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2223 {
2224 unsigned short fir_io, sir_io;
2225 int ret = -ENODEV;
2226
2227 IRDA_DEBUG(1, "%s\n", __func__);
2228
2229 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2230 return ret;
2231
2232 /* Select logical device (UART2) */
2233 outb(0x07, cfg_base);
2234 outb(0x05, cfg_base + 1);
2235
2236 /* SIR iobase */
2237 outb(0x60, cfg_base);
2238 sir_io = inb(cfg_base + 1) << 8;
2239 outb(0x61, cfg_base);
2240 sir_io |= inb(cfg_base + 1);
2241
2242 /* Read FIR base */
2243 outb(0x62, cfg_base);
2244 fir_io = inb(cfg_base + 1) << 8;
2245 outb(0x63, cfg_base);
2246 fir_io |= inb(cfg_base + 1);
2247 outb(0x2b, cfg_base); /* ??? */
2248
2249 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2250 ret = 0;
2251
2252 /* Exit configuration */
2253 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2254
2255 return ret;
2256 }
2257
2258
2259 static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2260 {
2261 IRDA_DEBUG(1, "%s\n", __func__);
2262
2263 outb(reg, cfg_base);
2264 return inb(cfg_base) != reg ? -1 : 0;
2265 }
2266
2267 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2268 {
2269 u8 devid, xdevid, rev;
2270
2271 IRDA_DEBUG(1, "%s\n", __func__);
2272
2273 /* Leave configuration */
2274
2275 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2276
2277 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2278 return NULL;
2279
2280 outb(reg, cfg_base);
2281
2282 xdevid = inb(cfg_base + 1);
2283
2284 /* Enter configuration */
2285
2286 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2287
2288 #if 0
2289 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2290 return NULL;
2291 #endif
2292
2293 /* probe device ID */
2294
2295 if (smsc_access(cfg_base, reg))
2296 return NULL;
2297
2298 devid = inb(cfg_base + 1);
2299
2300 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2301 return NULL;
2302
2303 /* probe revision ID */
2304
2305 if (smsc_access(cfg_base, reg + 1))
2306 return NULL;
2307
2308 rev = inb(cfg_base + 1);
2309
2310 if (rev >= 128) /* i think this will make no sense */
2311 return NULL;
2312
2313 if (devid == xdevid) /* protection against false positives */
2314 return NULL;
2315
2316 /* Check for expected device ID; are there others? */
2317
2318 while (chip->devid != devid) {
2319
2320 chip++;
2321
2322 if (chip->name == NULL)
2323 return NULL;
2324 }
2325
2326 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2327 devid, rev, cfg_base, type, chip->name);
2328
2329 if (chip->rev > rev) {
2330 IRDA_MESSAGE("Revision higher than expected\n");
2331 return NULL;
2332 }
2333
2334 if (chip->flags & NoIRDA)
2335 IRDA_MESSAGE("chipset does not support IRDA\n");
2336
2337 return chip;
2338 }
2339
2340 static int __init smsc_superio_fdc(unsigned short cfg_base)
2341 {
2342 int ret = -1;
2343
2344 if (!request_region(cfg_base, 2, driver_name)) {
2345 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2346 __func__, cfg_base);
2347 } else {
2348 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2349 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2350 ret = 0;
2351
2352 release_region(cfg_base, 2);
2353 }
2354
2355 return ret;
2356 }
2357
2358 static int __init smsc_superio_lpc(unsigned short cfg_base)
2359 {
2360 int ret = -1;
2361
2362 if (!request_region(cfg_base, 2, driver_name)) {
2363 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2364 __func__, cfg_base);
2365 } else {
2366 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2367 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2368 ret = 0;
2369
2370 release_region(cfg_base, 2);
2371 }
2372 return ret;
2373 }
2374
2375 /*
2376 * Look for some specific subsystem setups that need
2377 * pre-configuration not properly done by the BIOS (especially laptops)
2378 * This code is based in part on smcinit.c, tosh1800-smcinit.c
2379 * and tosh2450-smcinit.c. The table lists the device entries
2380 * for ISA bridges with an LPC (Low Pin Count) controller which
2381 * handles the communication with the SMSC device. After the LPC
2382 * controller is initialized through PCI, the SMSC device is initialized
2383 * through a dedicated port in the ISA port-mapped I/O area, this latter
2384 * area is used to configure the SMSC device with default
2385 * SIR and FIR I/O ports, DMA and IRQ. Different vendors have
2386 * used different sets of parameters and different control port
2387 * addresses making a subsystem device table necessary.
2388 */
2389 #ifdef CONFIG_PCI
2390 #define PCIID_VENDOR_INTEL 0x8086
2391 #define PCIID_VENDOR_ALI 0x10b9
2392 static struct smsc_ircc_subsystem_configuration subsystem_configurations[] __initdata = {
2393 /*
2394 * Subsystems needing entries:
2395 * 0x10b9:0x1533 0x103c:0x0850 HP nx9010 family
2396 * 0x10b9:0x1533 0x0e11:0x005a Compaq nc4000 family
2397 * 0x8086:0x24cc 0x0e11:0x002a HP nx9000 family
2398 */
2399 {
2400 /* Guessed entry */
2401 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2402 .device = 0x24cc,
2403 .subvendor = 0x103c,
2404 .subdevice = 0x08bc,
2405 .sir_io = 0x02f8,
2406 .fir_io = 0x0130,
2407 .fir_irq = 0x05,
2408 .fir_dma = 0x03,
2409 .cfg_base = 0x004e,
2410 .preconfigure = preconfigure_through_82801,
2411 .name = "HP nx5000 family",
2412 },
2413 {
2414 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2415 .device = 0x24cc,
2416 .subvendor = 0x103c,
2417 .subdevice = 0x088c,
2418 /* Quite certain these are the same for nc8000 as for nc6000 */
2419 .sir_io = 0x02f8,
2420 .fir_io = 0x0130,
2421 .fir_irq = 0x05,
2422 .fir_dma = 0x03,
2423 .cfg_base = 0x004e,
2424 .preconfigure = preconfigure_through_82801,
2425 .name = "HP nc8000 family",
2426 },
2427 {
2428 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2429 .device = 0x24cc,
2430 .subvendor = 0x103c,
2431 .subdevice = 0x0890,
2432 .sir_io = 0x02f8,
2433 .fir_io = 0x0130,
2434 .fir_irq = 0x05,
2435 .fir_dma = 0x03,
2436 .cfg_base = 0x004e,
2437 .preconfigure = preconfigure_through_82801,
2438 .name = "HP nc6000 family",
2439 },
2440 {
2441 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2442 .device = 0x24cc,
2443 .subvendor = 0x0e11,
2444 .subdevice = 0x0860,
2445 /* I assume these are the same for x1000 as for the others */
2446 .sir_io = 0x02e8,
2447 .fir_io = 0x02f8,
2448 .fir_irq = 0x07,
2449 .fir_dma = 0x03,
2450 .cfg_base = 0x002e,
2451 .preconfigure = preconfigure_through_82801,
2452 .name = "Compaq x1000 family",
2453 },
2454 {
2455 /* Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge */
2456 .vendor = PCIID_VENDOR_INTEL,
2457 .device = 0x24c0,
2458 .subvendor = 0x1179,
2459 .subdevice = 0xffff, /* 0xffff is "any" */
2460 .sir_io = 0x03f8,
2461 .fir_io = 0x0130,
2462 .fir_irq = 0x07,
2463 .fir_dma = 0x01,
2464 .cfg_base = 0x002e,
2465 .preconfigure = preconfigure_through_82801,
2466 .name = "Toshiba laptop with Intel 82801DB/DBL LPC bridge",
2467 },
2468 {
2469 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801CAM ISA bridge */
2470 .device = 0x248c,
2471 .subvendor = 0x1179,
2472 .subdevice = 0xffff, /* 0xffff is "any" */
2473 .sir_io = 0x03f8,
2474 .fir_io = 0x0130,
2475 .fir_irq = 0x03,
2476 .fir_dma = 0x03,
2477 .cfg_base = 0x002e,
2478 .preconfigure = preconfigure_through_82801,
2479 .name = "Toshiba laptop with Intel 82801CAM ISA bridge",
2480 },
2481 {
2482 /* 82801DBM (ICH4-M) LPC Interface Bridge */
2483 .vendor = PCIID_VENDOR_INTEL,
2484 .device = 0x24cc,
2485 .subvendor = 0x1179,
2486 .subdevice = 0xffff, /* 0xffff is "any" */
2487 .sir_io = 0x03f8,
2488 .fir_io = 0x0130,
2489 .fir_irq = 0x03,
2490 .fir_dma = 0x03,
2491 .cfg_base = 0x002e,
2492 .preconfigure = preconfigure_through_82801,
2493 .name = "Toshiba laptop with Intel 8281DBM LPC bridge",
2494 },
2495 {
2496 /* ALi M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] */
2497 .vendor = PCIID_VENDOR_ALI,
2498 .device = 0x1533,
2499 .subvendor = 0x1179,
2500 .subdevice = 0xffff, /* 0xffff is "any" */
2501 .sir_io = 0x02e8,
2502 .fir_io = 0x02f8,
2503 .fir_irq = 0x07,
2504 .fir_dma = 0x03,
2505 .cfg_base = 0x002e,
2506 .preconfigure = preconfigure_through_ali,
2507 .name = "Toshiba laptop with ALi ISA bridge",
2508 },
2509 { } // Terminator
2510 };
2511
2512
2513 /*
2514 * This sets up the basic SMSC parameters
2515 * (FIR port, SIR port, FIR DMA, FIR IRQ)
2516 * through the chip configuration port.
2517 */
2518 static int __init preconfigure_smsc_chip(struct
2519 smsc_ircc_subsystem_configuration
2520 *conf)
2521 {
2522 unsigned short iobase = conf->cfg_base;
2523 unsigned char tmpbyte;
2524
2525 outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state
2526 outb(SMSCSIOFLAT_DEVICEID_REG, iobase); // set for device ID
2527 tmpbyte = inb(iobase +1); // Read device ID
2528 IRDA_DEBUG(0,
2529 "Detected Chip id: 0x%02x, setting up registers...\n",
2530 tmpbyte);
2531
2532 /* Disable UART1 and set up SIR I/O port */
2533 outb(0x24, iobase); // select CR24 - UART1 base addr
2534 outb(0x00, iobase + 1); // disable UART1
2535 outb(SMSCSIOFLAT_UART2BASEADDR_REG, iobase); // select CR25 - UART2 base addr
2536 outb( (conf->sir_io >> 2), iobase + 1); // bits 2-9 of 0x3f8
2537 tmpbyte = inb(iobase + 1);
2538 if (tmpbyte != (conf->sir_io >> 2) ) {
2539 IRDA_WARNING("ERROR: could not configure SIR ioport.\n");
2540 IRDA_WARNING("Try to supply ircc_cfg argument.\n");
2541 return -ENXIO;
2542 }
2543
2544 /* Set up FIR IRQ channel for UART2 */
2545 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, iobase); // select CR28 - UART1,2 IRQ select
2546 tmpbyte = inb(iobase + 1);
2547 tmpbyte &= SMSCSIOFLAT_UART1IRQSELECT_MASK; // Do not touch the UART1 portion
2548 tmpbyte |= (conf->fir_irq & SMSCSIOFLAT_UART2IRQSELECT_MASK);
2549 outb(tmpbyte, iobase + 1);
2550 tmpbyte = inb(iobase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2551 if (tmpbyte != conf->fir_irq) {
2552 IRDA_WARNING("ERROR: could not configure FIR IRQ channel.\n");
2553 return -ENXIO;
2554 }
2555
2556 /* Set up FIR I/O port */
2557 outb(SMSCSIOFLAT_FIRBASEADDR_REG, iobase); // CR2B - SCE (FIR) base addr
2558 outb((conf->fir_io >> 3), iobase + 1);
2559 tmpbyte = inb(iobase + 1);
2560 if (tmpbyte != (conf->fir_io >> 3) ) {
2561 IRDA_WARNING("ERROR: could not configure FIR I/O port.\n");
2562 return -ENXIO;
2563 }
2564
2565 /* Set up FIR DMA channel */
2566 outb(SMSCSIOFLAT_FIRDMASELECT_REG, iobase); // CR2C - SCE (FIR) DMA select
2567 outb((conf->fir_dma & LPC47N227_FIRDMASELECT_MASK), iobase + 1); // DMA
2568 tmpbyte = inb(iobase + 1) & LPC47N227_FIRDMASELECT_MASK;
2569 if (tmpbyte != (conf->fir_dma & LPC47N227_FIRDMASELECT_MASK)) {
2570 IRDA_WARNING("ERROR: could not configure FIR DMA channel.\n");
2571 return -ENXIO;
2572 }
2573
2574 outb(SMSCSIOFLAT_UARTMODE0C_REG, iobase); // CR0C - UART mode
2575 tmpbyte = inb(iobase + 1);
2576 tmpbyte &= ~SMSCSIOFLAT_UART2MODE_MASK |
2577 SMSCSIOFLAT_UART2MODE_VAL_IRDA;
2578 outb(tmpbyte, iobase + 1); // enable IrDA (HPSIR) mode, high speed
2579
2580 outb(LPC47N227_APMBOOTDRIVE_REG, iobase); // CR07 - Auto Pwr Mgt/boot drive sel
2581 tmpbyte = inb(iobase + 1);
2582 outb(tmpbyte | LPC47N227_UART2AUTOPWRDOWN_MASK, iobase + 1); // enable UART2 autopower down
2583
2584 /* This one was not part of tosh1800 */
2585 outb(0x0a, iobase); // CR0a - ecp fifo / ir mux
2586 tmpbyte = inb(iobase + 1);
2587 outb(tmpbyte | 0x40, iobase + 1); // send active device to ir port
2588
2589 outb(LPC47N227_UART12POWER_REG, iobase); // CR02 - UART 1,2 power
2590 tmpbyte = inb(iobase + 1);
2591 outb(tmpbyte | LPC47N227_UART2POWERDOWN_MASK, iobase + 1); // UART2 power up mode, UART1 power down
2592
2593 outb(LPC47N227_FDCPOWERVALIDCONF_REG, iobase); // CR00 - FDC Power/valid config cycle
2594 tmpbyte = inb(iobase + 1);
2595 outb(tmpbyte | LPC47N227_VALID_MASK, iobase + 1); // valid config cycle done
2596
2597 outb(LPC47N227_CFGEXITKEY, iobase); // Exit configuration
2598
2599 return 0;
2600 }
2601
2602 /* 82801CAM generic registers */
2603 #define VID 0x00
2604 #define DID 0x02
2605 #define PIRQ_A_D_ROUT 0x60
2606 #define SIRQ_CNTL 0x64
2607 #define PIRQ_E_H_ROUT 0x68
2608 #define PCI_DMA_C 0x90
2609 /* LPC-specific registers */
2610 #define COM_DEC 0xe0
2611 #define GEN1_DEC 0xe4
2612 #define LPC_EN 0xe6
2613 #define GEN2_DEC 0xec
2614 /*
2615 * Sets up the I/O range using the 82801CAM ISA bridge, 82801DBM LPC bridge
2616 * or Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge.
2617 * They all work the same way!
2618 */
2619 static int __init preconfigure_through_82801(struct pci_dev *dev,
2620 struct
2621 smsc_ircc_subsystem_configuration
2622 *conf)
2623 {
2624 unsigned short tmpword;
2625 unsigned char tmpbyte;
2626
2627 IRDA_MESSAGE("Setting up Intel 82801 controller and SMSC device\n");
2628 /*
2629 * Select the range for the COMA COM port (SIR)
2630 * Register COM_DEC:
2631 * Bit 7: reserved
2632 * Bit 6-4, COMB decode range
2633 * Bit 3: reserved
2634 * Bit 2-0, COMA decode range
2635 *
2636 * Decode ranges:
2637 * 000 = 0x3f8-0x3ff (COM1)
2638 * 001 = 0x2f8-0x2ff (COM2)
2639 * 010 = 0x220-0x227
2640 * 011 = 0x228-0x22f
2641 * 100 = 0x238-0x23f
2642 * 101 = 0x2e8-0x2ef (COM4)
2643 * 110 = 0x338-0x33f
2644 * 111 = 0x3e8-0x3ef (COM3)
2645 */
2646 pci_read_config_byte(dev, COM_DEC, &tmpbyte);
2647 tmpbyte &= 0xf8; /* mask COMA bits */
2648 switch(conf->sir_io) {
2649 case 0x3f8:
2650 tmpbyte |= 0x00;
2651 break;
2652 case 0x2f8:
2653 tmpbyte |= 0x01;
2654 break;
2655 case 0x220:
2656 tmpbyte |= 0x02;
2657 break;
2658 case 0x228:
2659 tmpbyte |= 0x03;
2660 break;
2661 case 0x238:
2662 tmpbyte |= 0x04;
2663 break;
2664 case 0x2e8:
2665 tmpbyte |= 0x05;
2666 break;
2667 case 0x338:
2668 tmpbyte |= 0x06;
2669 break;
2670 case 0x3e8:
2671 tmpbyte |= 0x07;
2672 break;
2673 default:
2674 tmpbyte |= 0x01; /* COM2 default */
2675 }
2676 IRDA_DEBUG(1, "COM_DEC (write): 0x%02x\n", tmpbyte);
2677 pci_write_config_byte(dev, COM_DEC, tmpbyte);
2678
2679 /* Enable Low Pin Count interface */
2680 pci_read_config_word(dev, LPC_EN, &tmpword);
2681 /* These seem to be set up at all times,
2682 * just make sure it is properly set.
2683 */
2684 switch(conf->cfg_base) {
2685 case 0x04e:
2686 tmpword |= 0x2000;
2687 break;
2688 case 0x02e:
2689 tmpword |= 0x1000;
2690 break;
2691 case 0x062:
2692 tmpword |= 0x0800;
2693 break;
2694 case 0x060:
2695 tmpword |= 0x0400;
2696 break;
2697 default:
2698 IRDA_WARNING("Uncommon I/O base address: 0x%04x\n",
2699 conf->cfg_base);
2700 break;
2701 }
2702 tmpword &= 0xfffd; /* disable LPC COMB */
2703 tmpword |= 0x0001; /* set bit 0 : enable LPC COMA addr range (GEN2) */
2704 IRDA_DEBUG(1, "LPC_EN (write): 0x%04x\n", tmpword);
2705 pci_write_config_word(dev, LPC_EN, tmpword);
2706
2707 /*
2708 * Configure LPC DMA channel
2709 * PCI_DMA_C bits:
2710 * Bit 15-14: DMA channel 7 select
2711 * Bit 13-12: DMA channel 6 select
2712 * Bit 11-10: DMA channel 5 select
2713 * Bit 9-8: Reserved
2714 * Bit 7-6: DMA channel 3 select
2715 * Bit 5-4: DMA channel 2 select
2716 * Bit 3-2: DMA channel 1 select
2717 * Bit 1-0: DMA channel 0 select
2718 * 00 = Reserved value
2719 * 01 = PC/PCI DMA
2720 * 10 = Reserved value
2721 * 11 = LPC I/F DMA
2722 */
2723 pci_read_config_word(dev, PCI_DMA_C, &tmpword);
2724 switch(conf->fir_dma) {
2725 case 0x07:
2726 tmpword |= 0xc000;
2727 break;
2728 case 0x06:
2729 tmpword |= 0x3000;
2730 break;
2731 case 0x05:
2732 tmpword |= 0x0c00;
2733 break;
2734 case 0x03:
2735 tmpword |= 0x00c0;
2736 break;
2737 case 0x02:
2738 tmpword |= 0x0030;
2739 break;
2740 case 0x01:
2741 tmpword |= 0x000c;
2742 break;
2743 case 0x00:
2744 tmpword |= 0x0003;
2745 break;
2746 default:
2747 break; /* do not change settings */
2748 }
2749 IRDA_DEBUG(1, "PCI_DMA_C (write): 0x%04x\n", tmpword);
2750 pci_write_config_word(dev, PCI_DMA_C, tmpword);
2751
2752 /*
2753 * GEN2_DEC bits:
2754 * Bit 15-4: Generic I/O range
2755 * Bit 3-1: reserved (read as 0)
2756 * Bit 0: enable GEN2 range on LPC I/F
2757 */
2758 tmpword = conf->fir_io & 0xfff8;
2759 tmpword |= 0x0001;
2760 IRDA_DEBUG(1, "GEN2_DEC (write): 0x%04x\n", tmpword);
2761 pci_write_config_word(dev, GEN2_DEC, tmpword);
2762
2763 /* Pre-configure chip */
2764 return preconfigure_smsc_chip(conf);
2765 }
2766
2767 /*
2768 * Pre-configure a certain port on the ALi 1533 bridge.
2769 * This is based on reverse-engineering since ALi does not
2770 * provide any data sheet for the 1533 chip.
2771 */
2772 static void __init preconfigure_ali_port(struct pci_dev *dev,
2773 unsigned short port)
2774 {
2775 unsigned char reg;
2776 /* These bits obviously control the different ports */
2777 unsigned char mask;
2778 unsigned char tmpbyte;
2779
2780 switch(port) {
2781 case 0x0130:
2782 case 0x0178:
2783 reg = 0xb0;
2784 mask = 0x80;
2785 break;
2786 case 0x03f8:
2787 reg = 0xb4;
2788 mask = 0x80;
2789 break;
2790 case 0x02f8:
2791 reg = 0xb4;
2792 mask = 0x30;
2793 break;
2794 case 0x02e8:
2795 reg = 0xb4;
2796 mask = 0x08;
2797 break;
2798 default:
2799 IRDA_ERROR("Failed to configure unsupported port on ALi 1533 bridge: 0x%04x\n", port);
2800 return;
2801 }
2802
2803 pci_read_config_byte(dev, reg, &tmpbyte);
2804 /* Turn on the right bits */
2805 tmpbyte |= mask;
2806 pci_write_config_byte(dev, reg, tmpbyte);
2807 IRDA_MESSAGE("Activated ALi 1533 ISA bridge port 0x%04x.\n", port);
2808 return;
2809 }
2810
2811 static int __init preconfigure_through_ali(struct pci_dev *dev,
2812 struct
2813 smsc_ircc_subsystem_configuration
2814 *conf)
2815 {
2816 /* Configure the two ports on the ALi 1533 */
2817 preconfigure_ali_port(dev, conf->sir_io);
2818 preconfigure_ali_port(dev, conf->fir_io);
2819
2820 /* Pre-configure chip */
2821 return preconfigure_smsc_chip(conf);
2822 }
2823
2824 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
2825 unsigned short ircc_fir,
2826 unsigned short ircc_sir,
2827 unsigned char ircc_dma,
2828 unsigned char ircc_irq)
2829 {
2830 struct pci_dev *dev = NULL;
2831 unsigned short ss_vendor = 0x0000;
2832 unsigned short ss_device = 0x0000;
2833 int ret = 0;
2834
2835 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2836
2837 while (dev != NULL) {
2838 struct smsc_ircc_subsystem_configuration *conf;
2839
2840 /*
2841 * Cache the subsystem vendor/device:
2842 * some manufacturers fail to set this for all components,
2843 * so we save it in case there is just 0x0000 0x0000 on the
2844 * device we want to check.
2845 */
2846 if (dev->subsystem_vendor != 0x0000U) {
2847 ss_vendor = dev->subsystem_vendor;
2848 ss_device = dev->subsystem_device;
2849 }
2850 conf = subsystem_configurations;
2851 for( ; conf->subvendor; conf++) {
2852 if(conf->vendor == dev->vendor &&
2853 conf->device == dev->device &&
2854 conf->subvendor == ss_vendor &&
2855 /* Sometimes these are cached values */
2856 (conf->subdevice == ss_device ||
2857 conf->subdevice == 0xffff)) {
2858 struct smsc_ircc_subsystem_configuration
2859 tmpconf;
2860
2861 memcpy(&tmpconf, conf,
2862 sizeof(struct smsc_ircc_subsystem_configuration));
2863
2864 /*
2865 * Override the default values with anything
2866 * passed in as parameter
2867 */
2868 if (ircc_cfg != 0)
2869 tmpconf.cfg_base = ircc_cfg;
2870 if (ircc_fir != 0)
2871 tmpconf.fir_io = ircc_fir;
2872 if (ircc_sir != 0)
2873 tmpconf.sir_io = ircc_sir;
2874 if (ircc_dma != DMA_INVAL)
2875 tmpconf.fir_dma = ircc_dma;
2876 if (ircc_irq != IRQ_INVAL)
2877 tmpconf.fir_irq = ircc_irq;
2878
2879 IRDA_MESSAGE("Detected unconfigured %s SMSC IrDA chip, pre-configuring device.\n", conf->name);
2880 if (conf->preconfigure)
2881 ret = conf->preconfigure(dev, &tmpconf);
2882 else
2883 ret = -ENODEV;
2884 }
2885 }
2886 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2887 }
2888
2889 return ret;
2890 }
2891 #endif // CONFIG_PCI
2892
2893 /************************************************
2894 *
2895 * Transceivers specific functions
2896 *
2897 ************************************************/
2898
2899
2900 /*
2901 * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2902 *
2903 * Program transceiver through smsc-ircc ATC circuitry
2904 *
2905 */
2906
2907 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2908 {
2909 unsigned long jiffies_now, jiffies_timeout;
2910 u8 val;
2911
2912 jiffies_now = jiffies;
2913 jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2914
2915 /* ATC */
2916 register_bank(fir_base, 4);
2917 outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
2918 fir_base + IRCC_ATC);
2919
2920 while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
2921 !time_after(jiffies, jiffies_timeout))
2922 /* empty */;
2923
2924 if (val)
2925 IRDA_WARNING("%s(): ATC: 0x%02x\n", __func__,
2926 inb(fir_base + IRCC_ATC));
2927 }
2928
2929 /*
2930 * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2931 *
2932 * Probe transceiver smsc-ircc ATC circuitry
2933 *
2934 */
2935
2936 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2937 {
2938 return 0;
2939 }
2940
2941 /*
2942 * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2943 *
2944 * Set transceiver
2945 *
2946 */
2947
2948 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2949 {
2950 u8 fast_mode;
2951
2952 switch (speed) {
2953 default:
2954 case 576000 :
2955 fast_mode = 0;
2956 break;
2957 case 1152000 :
2958 case 4000000 :
2959 fast_mode = IRCC_LCR_A_FAST;
2960 break;
2961 }
2962 register_bank(fir_base, 0);
2963 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2964 }
2965
2966 /*
2967 * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2968 *
2969 * Probe transceiver
2970 *
2971 */
2972
2973 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2974 {
2975 return 0;
2976 }
2977
2978 /*
2979 * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2980 *
2981 * Set transceiver
2982 *
2983 */
2984
2985 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
2986 {
2987 u8 fast_mode;
2988
2989 switch (speed) {
2990 default:
2991 case 576000 :
2992 fast_mode = 0;
2993 break;
2994 case 1152000 :
2995 case 4000000 :
2996 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
2997 break;
2998
2999 }
3000 /* This causes an interrupt */
3001 register_bank(fir_base, 0);
3002 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
3003 }
3004
3005 /*
3006 * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
3007 *
3008 * Probe transceiver
3009 *
3010 */
3011
3012 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
3013 {
3014 return 0;
3015 }
3016
3017
3018 module_init(smsc_ircc_init);
3019 module_exit(smsc_ircc_cleanup);
Linux kernel - Deliverables
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