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Linux 2.6.25
[linux-2.6/s3c2410-cpufreq.git] / drivers / net / irda / smsc-ircc2.c
blob1f26da761e9f0067ca49450f31d48cad23cf6317
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 * Copyright (c) 2006 Linus Walleij
15 *
16 *
17 * Based on smc-ircc.c:
18 *
19 * Copyright (c) 2001 Stefani Seibold
20 * Copyright (c) 1999-2001 Dag Brattli
21 * Copyright (c) 1998-1999 Thomas Davis,
22 *
23 * and irport.c:
24 *
25 * Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
26 *
27 *
28 * This program is free software; you can redistribute it and/or
29 * modify it under the terms of the GNU General Public License as
30 * published by the Free Software Foundation; either version 2 of
31 * the License, or (at your option) any later version.
32 *
33 * This program is distributed in the hope that it will be useful,
34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
36 * GNU General Public License for more details.
37 *
38 * You should have received a copy of the GNU General Public License
39 * along with this program; if not, write to the Free Software
40 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
41 * MA 02111-1307 USA
42 *
43 ********************************************************************/
44
45 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/types.h>
48 #include <linux/skbuff.h>
49 #include <linux/netdevice.h>
50 #include <linux/ioport.h>
51 #include <linux/delay.h>
52 #include <linux/slab.h>
53 #include <linux/init.h>
54 #include <linux/rtnetlink.h>
55 #include <linux/serial_reg.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/pnp.h>
58 #include <linux/platform_device.h>
59
60 #include <asm/io.h>
61 #include <asm/dma.h>
62 #include <asm/byteorder.h>
63
64 #include <linux/spinlock.h>
65 #include <linux/pm.h>
66 #ifdef CONFIG_PCI
67 #include <linux/pci.h>
68 #endif
69
70 #include <net/irda/wrapper.h>
71 #include <net/irda/irda.h>
72 #include <net/irda/irda_device.h>
73
74 #include "smsc-ircc2.h"
75 #include "smsc-sio.h"
76
77
78 MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
79 MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
80 MODULE_LICENSE("GPL");
81
82 static int smsc_nopnp = 1;
83 module_param_named(nopnp, smsc_nopnp, bool, 0);
84 MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings, defaults to true");
85
86 #define DMA_INVAL 255
87 static int ircc_dma = DMA_INVAL;
88 module_param(ircc_dma, int, 0);
89 MODULE_PARM_DESC(ircc_dma, "DMA channel");
90
91 #define IRQ_INVAL 255
92 static int ircc_irq = IRQ_INVAL;
93 module_param(ircc_irq, int, 0);
94 MODULE_PARM_DESC(ircc_irq, "IRQ line");
95
96 static int ircc_fir;
97 module_param(ircc_fir, int, 0);
98 MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
99
100 static int ircc_sir;
101 module_param(ircc_sir, int, 0);
102 MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
103
104 static int ircc_cfg;
105 module_param(ircc_cfg, int, 0);
106 MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
107
108 static int ircc_transceiver;
109 module_param(ircc_transceiver, int, 0);
110 MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
111
112 /* Types */
113
114 #ifdef CONFIG_PCI
115 struct smsc_ircc_subsystem_configuration {
116 unsigned short vendor; /* PCI vendor ID */
117 unsigned short device; /* PCI vendor ID */
118 unsigned short subvendor; /* PCI subsystem vendor ID */
119 unsigned short subdevice; /* PCI sybsystem device ID */
120 unsigned short sir_io; /* I/O port for SIR */
121 unsigned short fir_io; /* I/O port for FIR */
122 unsigned char fir_irq; /* FIR IRQ */
123 unsigned char fir_dma; /* FIR DMA */
124 unsigned short cfg_base; /* I/O port for chip configuration */
125 int (*preconfigure)(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf); /* Preconfig function */
126 const char *name; /* name shown as info */
127 };
128 #endif
129
130 struct smsc_transceiver {
131 char *name;
132 void (*set_for_speed)(int fir_base, u32 speed);
133 int (*probe)(int fir_base);
134 };
135
136 struct smsc_chip {
137 char *name;
138 #if 0
139 u8 type;
140 #endif
141 u16 flags;
142 u8 devid;
143 u8 rev;
144 };
145
146 struct smsc_chip_address {
147 unsigned int cfg_base;
148 unsigned int type;
149 };
150
151 /* Private data for each instance */
152 struct smsc_ircc_cb {
153 struct net_device *netdev; /* Yes! we are some kind of netdevice */
154 struct net_device_stats stats;
155 struct irlap_cb *irlap; /* The link layer we are binded to */
156
157 chipio_t io; /* IrDA controller information */
158 iobuff_t tx_buff; /* Transmit buffer */
159 iobuff_t rx_buff; /* Receive buffer */
160 dma_addr_t tx_buff_dma;
161 dma_addr_t rx_buff_dma;
162
163 struct qos_info qos; /* QoS capabilities for this device */
164
165 spinlock_t lock; /* For serializing operations */
166
167 __u32 new_speed;
168 __u32 flags; /* Interface flags */
169
170 int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
171 int tx_len; /* Number of frames in tx_buff */
172
173 int transceiver;
174 struct platform_device *pldev;
175 };
176
177 /* Constants */
178
179 #define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
180
181 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
182 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
183 #define SMSC_IRCC2_C_NET_TIMEOUT 0
184 #define SMSC_IRCC2_C_SIR_STOP 0
185
186 static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
187
188 /* Prototypes */
189
190 static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
191 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
192 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
193 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
194 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
195 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
196 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
197 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
198 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
199 static int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
200 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
201 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs);
202 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self);
203 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed);
204 static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, u32 speed);
205 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id);
206 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
207 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
208 #if SMSC_IRCC2_C_SIR_STOP
209 static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
210 #endif
211 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
212 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
213 static int smsc_ircc_net_open(struct net_device *dev);
214 static int smsc_ircc_net_close(struct net_device *dev);
215 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
216 #if SMSC_IRCC2_C_NET_TIMEOUT
217 static void smsc_ircc_timeout(struct net_device *dev);
218 #endif
219 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
220 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
221 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
222 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
223 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
224
225 /* Probing */
226 static int __init smsc_ircc_look_for_chips(void);
227 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
228 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
229 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
230 static int __init smsc_superio_fdc(unsigned short cfg_base);
231 static int __init smsc_superio_lpc(unsigned short cfg_base);
232 #ifdef CONFIG_PCI
233 static int __init preconfigure_smsc_chip(struct smsc_ircc_subsystem_configuration *conf);
234 static int __init preconfigure_through_82801(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
235 static void __init preconfigure_ali_port(struct pci_dev *dev,
236 unsigned short port);
237 static int __init preconfigure_through_ali(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
238 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
239 unsigned short ircc_fir,
240 unsigned short ircc_sir,
241 unsigned char ircc_dma,
242 unsigned char ircc_irq);
243 #endif
244
245 /* Transceivers specific functions */
246
247 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
248 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
249 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
250 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
251 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
252 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
253
254 /* Power Management */
255
256 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
257 static int smsc_ircc_resume(struct platform_device *dev);
258
259 static struct platform_driver smsc_ircc_driver = {
260 .suspend = smsc_ircc_suspend,
261 .resume = smsc_ircc_resume,
262 .driver = {
263 .name = SMSC_IRCC2_DRIVER_NAME,
264 },
265 };
266
267 /* Transceivers for SMSC-ircc */
268
269 static struct smsc_transceiver smsc_transceivers[] =
270 {
271 { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
272 { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
273 { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
274 { NULL, NULL }
275 };
276 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
277
278 /* SMC SuperIO chipsets definitions */
279
280 #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
281 #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
282 #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
283 #define SIR 0 /* SuperIO Chip has only slow IRDA */
284 #define FIR 4 /* SuperIO Chip has fast IRDA */
285 #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
286
287 static struct smsc_chip __initdata fdc_chips_flat[] =
288 {
289 /* Base address 0x3f0 or 0x370 */
290 { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
291 { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
292 { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
293 { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
294 { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
295 { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
296 { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
297 { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
298 { NULL }
299 };
300
301 static struct smsc_chip __initdata fdc_chips_paged[] =
302 {
303 /* Base address 0x3f0 or 0x370 */
304 { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
305 { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
306 { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
307 { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
308 { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
309 { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
310 { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
311 { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
312 { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
313 { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
314 { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
315 { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
316 { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
317 { NULL }
318 };
319
320 static struct smsc_chip __initdata lpc_chips_flat[] =
321 {
322 /* Base address 0x2E or 0x4E */
323 { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
324 { "47N227", KEY55_1|FIR|SERx4, 0x7a, 0x00 },
325 { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
326 { NULL }
327 };
328
329 static struct smsc_chip __initdata lpc_chips_paged[] =
330 {
331 /* Base address 0x2E or 0x4E */
332 { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
333 { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
334 { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
335 { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
336 { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
337 { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
338 { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
339 { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
340 { NULL }
341 };
342
343 #define SMSCSIO_TYPE_FDC 1
344 #define SMSCSIO_TYPE_LPC 2
345 #define SMSCSIO_TYPE_FLAT 4
346 #define SMSCSIO_TYPE_PAGED 8
347
348 static struct smsc_chip_address __initdata possible_addresses[] =
349 {
350 { 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
351 { 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
352 { 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
353 { 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
354 { 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
355 { 0, 0 }
356 };
357
358 /* Globals */
359
360 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
361 static unsigned short dev_count;
362
363 static inline void register_bank(int iobase, int bank)
364 {
365 outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
366 iobase + IRCC_MASTER);
367 }
368
369 /* PNP hotplug support */
370 static const struct pnp_device_id smsc_ircc_pnp_table[] = {
371 { .id = "SMCf010", .driver_data = 0 },
372 /* and presumably others */
373 { }
374 };
375 MODULE_DEVICE_TABLE(pnp, smsc_ircc_pnp_table);
376
377 static int pnp_driver_registered;
378
379 static int __init smsc_ircc_pnp_probe(struct pnp_dev *dev,
380 const struct pnp_device_id *dev_id)
381 {
382 unsigned int firbase, sirbase;
383 u8 dma, irq;
384
385 if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
386 pnp_dma_valid(dev, 0) && pnp_irq_valid(dev, 0)))
387 return -EINVAL;
388
389 sirbase = pnp_port_start(dev, 0);
390 firbase = pnp_port_start(dev, 1);
391 dma = pnp_dma(dev, 0);
392 irq = pnp_irq(dev, 0);
393
394 if (smsc_ircc_open(firbase, sirbase, dma, irq))
395 return -ENODEV;
396
397 return 0;
398 }
399
400 static struct pnp_driver smsc_ircc_pnp_driver = {
401 .name = "smsc-ircc2",
402 .id_table = smsc_ircc_pnp_table,
403 .probe = smsc_ircc_pnp_probe,
404 };
405
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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__);
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 dev->get_stats = smsc_ircc_net_get_stats;
531
532 self = netdev_priv(dev);
533 self->netdev = dev;
534
535 /* Make ifconfig display some details */
536 dev->base_addr = self->io.fir_base = fir_base;
537 dev->irq = self->io.irq = irq;
538
539 /* Need to store self somewhere */
540 dev_self[dev_count] = self;
541 spin_lock_init(&self->lock);
542
543 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
544 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
545
546 self->rx_buff.head =
547 dma_alloc_coherent(NULL, self->rx_buff.truesize,
548 &self->rx_buff_dma, GFP_KERNEL);
549 if (self->rx_buff.head == NULL) {
550 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
551 driver_name);
552 goto err_out2;
553 }
554
555 self->tx_buff.head =
556 dma_alloc_coherent(NULL, self->tx_buff.truesize,
557 &self->tx_buff_dma, GFP_KERNEL);
558 if (self->tx_buff.head == NULL) {
559 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
560 driver_name);
561 goto err_out3;
562 }
563
564 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
565 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
566
567 self->rx_buff.in_frame = FALSE;
568 self->rx_buff.state = OUTSIDE_FRAME;
569 self->tx_buff.data = self->tx_buff.head;
570 self->rx_buff.data = self->rx_buff.head;
571
572 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
573 smsc_ircc_setup_qos(self);
574 smsc_ircc_init_chip(self);
575
576 if (ircc_transceiver > 0 &&
577 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
578 self->transceiver = ircc_transceiver;
579 else
580 smsc_ircc_probe_transceiver(self);
581
582 err = register_netdev(self->netdev);
583 if (err) {
584 IRDA_ERROR("%s, Network device registration failed!\n",
585 driver_name);
586 goto err_out4;
587 }
588
589 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
590 dev_count, NULL, 0);
591 if (IS_ERR(self->pldev)) {
592 err = PTR_ERR(self->pldev);
593 goto err_out5;
594 }
595 platform_set_drvdata(self->pldev, self);
596
597 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
598 dev_count++;
599
600 return 0;
601
602 err_out5:
603 unregister_netdev(self->netdev);
604
605 err_out4:
606 dma_free_coherent(NULL, self->tx_buff.truesize,
607 self->tx_buff.head, self->tx_buff_dma);
608 err_out3:
609 dma_free_coherent(NULL, self->rx_buff.truesize,
610 self->rx_buff.head, self->rx_buff_dma);
611 err_out2:
612 free_netdev(self->netdev);
613 dev_self[dev_count] = NULL;
614 err_out1:
615 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
616 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
617 err_out:
618 return err;
619 }
620
621 /*
622 * Function smsc_ircc_present(fir_base, sir_base)
623 *
624 * Check the smsc-ircc chip presence
625 *
626 */
627 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
628 {
629 unsigned char low, high, chip, config, dma, irq, version;
630
631 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
632 driver_name)) {
633 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
634 __FUNCTION__, fir_base);
635 goto out1;
636 }
637
638 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
639 driver_name)) {
640 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
641 __FUNCTION__, sir_base);
642 goto out2;
643 }
644
645 register_bank(fir_base, 3);
646
647 high = inb(fir_base + IRCC_ID_HIGH);
648 low = inb(fir_base + IRCC_ID_LOW);
649 chip = inb(fir_base + IRCC_CHIP_ID);
650 version = inb(fir_base + IRCC_VERSION);
651 config = inb(fir_base + IRCC_INTERFACE);
652 dma = config & IRCC_INTERFACE_DMA_MASK;
653 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
654
655 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
656 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
657 __FUNCTION__, fir_base);
658 goto out3;
659 }
660 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
661 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
662 chip & 0x0f, version, fir_base, sir_base, dma, irq);
663
664 return 0;
665
666 out3:
667 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
668 out2:
669 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
670 out1:
671 return -ENODEV;
672 }
673
674 /*
675 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
676 *
677 * Setup I/O
678 *
679 */
680 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
681 unsigned int fir_base, unsigned int sir_base,
682 u8 dma, u8 irq)
683 {
684 unsigned char config, chip_dma, chip_irq;
685
686 register_bank(fir_base, 3);
687 config = inb(fir_base + IRCC_INTERFACE);
688 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
689 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
690
691 self->io.fir_base = fir_base;
692 self->io.sir_base = sir_base;
693 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
694 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
695 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
696 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
697
698 if (irq != IRQ_INVAL) {
699 if (irq != chip_irq)
700 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
701 driver_name, chip_irq, irq);
702 self->io.irq = irq;
703 } else
704 self->io.irq = chip_irq;
705
706 if (dma != DMA_INVAL) {
707 if (dma != chip_dma)
708 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
709 driver_name, chip_dma, dma);
710 self->io.dma = dma;
711 } else
712 self->io.dma = chip_dma;
713
714 }
715
716 /*
717 * Function smsc_ircc_setup_qos(self)
718 *
719 * Setup qos
720 *
721 */
722 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
723 {
724 /* Initialize QoS for this device */
725 irda_init_max_qos_capabilies(&self->qos);
726
727 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
728 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
729
730 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
731 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
732 irda_qos_bits_to_value(&self->qos);
733 }
734
735 /*
736 * Function smsc_ircc_init_chip(self)
737 *
738 * Init chip
739 *
740 */
741 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
742 {
743 int iobase = self->io.fir_base;
744
745 register_bank(iobase, 0);
746 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
747 outb(0x00, iobase + IRCC_MASTER);
748
749 register_bank(iobase, 1);
750 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
751 iobase + IRCC_SCE_CFGA);
752
753 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
754 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
755 iobase + IRCC_SCE_CFGB);
756 #else
757 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
758 iobase + IRCC_SCE_CFGB);
759 #endif
760 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
761 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
762
763 register_bank(iobase, 4);
764 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
765
766 register_bank(iobase, 0);
767 outb(0, iobase + IRCC_LCR_A);
768
769 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
770
771 /* Power on device */
772 outb(0x00, iobase + IRCC_MASTER);
773 }
774
775 /*
776 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
777 *
778 * Process IOCTL commands for this device
779 *
780 */
781 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
782 {
783 struct if_irda_req *irq = (struct if_irda_req *) rq;
784 struct smsc_ircc_cb *self;
785 unsigned long flags;
786 int ret = 0;
787
788 IRDA_ASSERT(dev != NULL, return -1;);
789
790 self = netdev_priv(dev);
791
792 IRDA_ASSERT(self != NULL, return -1;);
793
794 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
795
796 switch (cmd) {
797 case SIOCSBANDWIDTH: /* Set bandwidth */
798 if (!capable(CAP_NET_ADMIN))
799 ret = -EPERM;
800 else {
801 /* Make sure we are the only one touching
802 * self->io.speed and the hardware - Jean II */
803 spin_lock_irqsave(&self->lock, flags);
804 smsc_ircc_change_speed(self, irq->ifr_baudrate);
805 spin_unlock_irqrestore(&self->lock, flags);
806 }
807 break;
808 case SIOCSMEDIABUSY: /* Set media busy */
809 if (!capable(CAP_NET_ADMIN)) {
810 ret = -EPERM;
811 break;
812 }
813
814 irda_device_set_media_busy(self->netdev, TRUE);
815 break;
816 case SIOCGRECEIVING: /* Check if we are receiving right now */
817 irq->ifr_receiving = smsc_ircc_is_receiving(self);
818 break;
819 #if 0
820 case SIOCSDTRRTS:
821 if (!capable(CAP_NET_ADMIN)) {
822 ret = -EPERM;
823 break;
824 }
825 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
826 break;
827 #endif
828 default:
829 ret = -EOPNOTSUPP;
830 }
831
832 return ret;
833 }
834
835 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
836 {
837 struct smsc_ircc_cb *self = netdev_priv(dev);
838
839 return &self->stats;
840 }
841
842 #if SMSC_IRCC2_C_NET_TIMEOUT
843 /*
844 * Function smsc_ircc_timeout (struct net_device *dev)
845 *
846 * The networking timeout management.
847 *
848 */
849
850 static void smsc_ircc_timeout(struct net_device *dev)
851 {
852 struct smsc_ircc_cb *self = netdev_priv(dev);
853 unsigned long flags;
854
855 IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
856 dev->name, self->io.speed);
857 spin_lock_irqsave(&self->lock, flags);
858 smsc_ircc_sir_start(self);
859 smsc_ircc_change_speed(self, self->io.speed);
860 dev->trans_start = jiffies;
861 netif_wake_queue(dev);
862 spin_unlock_irqrestore(&self->lock, flags);
863 }
864 #endif
865
866 /*
867 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
868 *
869 * Transmits the current frame until FIFO is full, then
870 * waits until the next transmit interrupt, and continues until the
871 * frame is transmitted.
872 */
873 int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
874 {
875 struct smsc_ircc_cb *self;
876 unsigned long flags;
877 s32 speed;
878
879 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
880
881 IRDA_ASSERT(dev != NULL, return 0;);
882
883 self = netdev_priv(dev);
884 IRDA_ASSERT(self != NULL, return 0;);
885
886 netif_stop_queue(dev);
887
888 /* Make sure test of self->io.speed & speed change are atomic */
889 spin_lock_irqsave(&self->lock, flags);
890
891 /* Check if we need to change the speed */
892 speed = irda_get_next_speed(skb);
893 if (speed != self->io.speed && speed != -1) {
894 /* Check for empty frame */
895 if (!skb->len) {
896 /*
897 * We send frames one by one in SIR mode (no
898 * pipelining), so at this point, if we were sending
899 * a previous frame, we just received the interrupt
900 * telling us it is finished (UART_IIR_THRI).
901 * Therefore, waiting for the transmitter to really
902 * finish draining the fifo won't take too long.
903 * And the interrupt handler is not expected to run.
904 * - Jean II */
905 smsc_ircc_sir_wait_hw_transmitter_finish(self);
906 smsc_ircc_change_speed(self, speed);
907 spin_unlock_irqrestore(&self->lock, flags);
908 dev_kfree_skb(skb);
909 return 0;
910 }
911 self->new_speed = speed;
912 }
913
914 /* Init tx buffer */
915 self->tx_buff.data = self->tx_buff.head;
916
917 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
918 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
919 self->tx_buff.truesize);
920
921 self->stats.tx_bytes += self->tx_buff.len;
922
923 /* Turn on transmit finished interrupt. Will fire immediately! */
924 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
925
926 spin_unlock_irqrestore(&self->lock, flags);
927
928 dev_kfree_skb(skb);
929
930 return 0;
931 }
932
933 /*
934 * Function smsc_ircc_set_fir_speed (self, baud)
935 *
936 * Change the speed of the device
937 *
938 */
939 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
940 {
941 int fir_base, ir_mode, ctrl, fast;
942
943 IRDA_ASSERT(self != NULL, return;);
944 fir_base = self->io.fir_base;
945
946 self->io.speed = speed;
947
948 switch (speed) {
949 default:
950 case 576000:
951 ir_mode = IRCC_CFGA_IRDA_HDLC;
952 ctrl = IRCC_CRC;
953 fast = 0;
954 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
955 break;
956 case 1152000:
957 ir_mode = IRCC_CFGA_IRDA_HDLC;
958 ctrl = IRCC_1152 | IRCC_CRC;
959 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
960 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
961 __FUNCTION__);
962 break;
963 case 4000000:
964 ir_mode = IRCC_CFGA_IRDA_4PPM;
965 ctrl = IRCC_CRC;
966 fast = IRCC_LCR_A_FAST;
967 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
968 __FUNCTION__);
969 break;
970 }
971 #if 0
972 Now in tranceiver!
973 /* This causes an interrupt */
974 register_bank(fir_base, 0);
975 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
976 #endif
977
978 register_bank(fir_base, 1);
979 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
980
981 register_bank(fir_base, 4);
982 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
983 }
984
985 /*
986 * Function smsc_ircc_fir_start(self)
987 *
988 * Change the speed of the device
989 *
990 */
991 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
992 {
993 struct net_device *dev;
994 int fir_base;
995
996 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
997
998 IRDA_ASSERT(self != NULL, return;);
999 dev = self->netdev;
1000 IRDA_ASSERT(dev != NULL, return;);
1001
1002 fir_base = self->io.fir_base;
1003
1004 /* Reset everything */
1005
1006 /* Install FIR transmit handler */
1007 dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
1008
1009 /* Clear FIFO */
1010 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
1011
1012 /* Enable interrupt */
1013 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
1014
1015 register_bank(fir_base, 1);
1016
1017 /* Select the TX/RX interface */
1018 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
1019 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
1020 fir_base + IRCC_SCE_CFGB);
1021 #else
1022 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
1023 fir_base + IRCC_SCE_CFGB);
1024 #endif
1025 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
1026
1027 /* Enable SCE interrupts */
1028 outb(0, fir_base + IRCC_MASTER);
1029 register_bank(fir_base, 0);
1030 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
1031 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
1032 }
1033
1034 /*
1035 * Function smsc_ircc_fir_stop(self, baud)
1036 *
1037 * Change the speed of the device
1038 *
1039 */
1040 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
1041 {
1042 int fir_base;
1043
1044 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1045
1046 IRDA_ASSERT(self != NULL, return;);
1047
1048 fir_base = self->io.fir_base;
1049 register_bank(fir_base, 0);
1050 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
1051 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
1052 }
1053
1054
1055 /*
1056 * Function smsc_ircc_change_speed(self, baud)
1057 *
1058 * Change the speed of the device
1059 *
1060 * This function *must* be called with spinlock held, because it may
1061 * be called from the irq handler. - Jean II
1062 */
1063 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
1064 {
1065 struct net_device *dev;
1066 int last_speed_was_sir;
1067
1068 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);
1069
1070 IRDA_ASSERT(self != NULL, return;);
1071 dev = self->netdev;
1072
1073 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
1074
1075 #if 0
1076 /* Temp Hack */
1077 speed= 1152000;
1078 self->io.speed = speed;
1079 last_speed_was_sir = 0;
1080 smsc_ircc_fir_start(self);
1081 #endif
1082
1083 if (self->io.speed == 0)
1084 smsc_ircc_sir_start(self);
1085
1086 #if 0
1087 if (!last_speed_was_sir) speed = self->io.speed;
1088 #endif
1089
1090 if (self->io.speed != speed)
1091 smsc_ircc_set_transceiver_for_speed(self, speed);
1092
1093 self->io.speed = speed;
1094
1095 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1096 if (!last_speed_was_sir) {
1097 smsc_ircc_fir_stop(self);
1098 smsc_ircc_sir_start(self);
1099 }
1100 smsc_ircc_set_sir_speed(self, speed);
1101 } else {
1102 if (last_speed_was_sir) {
1103 #if SMSC_IRCC2_C_SIR_STOP
1104 smsc_ircc_sir_stop(self);
1105 #endif
1106 smsc_ircc_fir_start(self);
1107 }
1108 smsc_ircc_set_fir_speed(self, speed);
1109
1110 #if 0
1111 self->tx_buff.len = 10;
1112 self->tx_buff.data = self->tx_buff.head;
1113
1114 smsc_ircc_dma_xmit(self, 4000);
1115 #endif
1116 /* Be ready for incoming frames */
1117 smsc_ircc_dma_receive(self);
1118 }
1119
1120 netif_wake_queue(dev);
1121 }
1122
1123 /*
1124 * Function smsc_ircc_set_sir_speed (self, speed)
1125 *
1126 * Set speed of IrDA port to specified baudrate
1127 *
1128 */
1129 void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1130 {
1131 int iobase;
1132 int fcr; /* FIFO control reg */
1133 int lcr; /* Line control reg */
1134 int divisor;
1135
1136 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __FUNCTION__, speed);
1137
1138 IRDA_ASSERT(self != NULL, return;);
1139 iobase = self->io.sir_base;
1140
1141 /* Update accounting for new speed */
1142 self->io.speed = speed;
1143
1144 /* Turn off interrupts */
1145 outb(0, iobase + UART_IER);
1146
1147 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1148
1149 fcr = UART_FCR_ENABLE_FIFO;
1150
1151 /*
1152 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1153 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1154 * about this timeout since it will always be fast enough.
1155 */
1156 fcr |= self->io.speed < 38400 ?
1157 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1158
1159 /* IrDA ports use 8N1 */
1160 lcr = UART_LCR_WLEN8;
1161
1162 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1163 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1164 outb(divisor >> 8, iobase + UART_DLM);
1165 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1166 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1167
1168 /* Turn on interrups */
1169 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1170
1171 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __FUNCTION__, speed);
1172 }
1173
1174
1175 /*
1176 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1177 *
1178 * Transmit the frame!
1179 *
1180 */
1181 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1182 {
1183 struct smsc_ircc_cb *self;
1184 unsigned long flags;
1185 s32 speed;
1186 int mtt;
1187
1188 IRDA_ASSERT(dev != NULL, return 0;);
1189 self = netdev_priv(dev);
1190 IRDA_ASSERT(self != NULL, return 0;);
1191
1192 netif_stop_queue(dev);
1193
1194 /* Make sure test of self->io.speed & speed change are atomic */
1195 spin_lock_irqsave(&self->lock, flags);
1196
1197 /* Check if we need to change the speed after this frame */
1198 speed = irda_get_next_speed(skb);
1199 if (speed != self->io.speed && speed != -1) {
1200 /* Check for empty frame */
1201 if (!skb->len) {
1202 /* Note : you should make sure that speed changes
1203 * are not going to corrupt any outgoing frame.
1204 * Look at nsc-ircc for the gory details - Jean II */
1205 smsc_ircc_change_speed(self, speed);
1206 spin_unlock_irqrestore(&self->lock, flags);
1207 dev_kfree_skb(skb);
1208 return 0;
1209 }
1210
1211 self->new_speed = speed;
1212 }
1213
1214 skb_copy_from_linear_data(skb, self->tx_buff.head, skb->len);
1215
1216 self->tx_buff.len = skb->len;
1217 self->tx_buff.data = self->tx_buff.head;
1218
1219 mtt = irda_get_mtt(skb);
1220 if (mtt) {
1221 int bofs;
1222
1223 /*
1224 * Compute how many BOFs (STA or PA's) we need to waste the
1225 * min turn time given the speed of the link.
1226 */
1227 bofs = mtt * (self->io.speed / 1000) / 8000;
1228 if (bofs > 4095)
1229 bofs = 4095;
1230
1231 smsc_ircc_dma_xmit(self, bofs);
1232 } else {
1233 /* Transmit frame */
1234 smsc_ircc_dma_xmit(self, 0);
1235 }
1236
1237 spin_unlock_irqrestore(&self->lock, flags);
1238 dev_kfree_skb(skb);
1239
1240 return 0;
1241 }
1242
1243 /*
1244 * Function smsc_ircc_dma_xmit (self, bofs)
1245 *
1246 * Transmit data using DMA
1247 *
1248 */
1249 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1250 {
1251 int iobase = self->io.fir_base;
1252 u8 ctrl;
1253
1254 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1255 #if 1
1256 /* Disable Rx */
1257 register_bank(iobase, 0);
1258 outb(0x00, iobase + IRCC_LCR_B);
1259 #endif
1260 register_bank(iobase, 1);
1261 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1262 iobase + IRCC_SCE_CFGB);
1263
1264 self->io.direction = IO_XMIT;
1265
1266 /* Set BOF additional count for generating the min turn time */
1267 register_bank(iobase, 4);
1268 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1269 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1270 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1271
1272 /* Set max Tx frame size */
1273 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1274 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1275
1276 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1277
1278 /* Enable burst mode chip Tx DMA */
1279 register_bank(iobase, 1);
1280 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1281 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1282
1283 /* Setup DMA controller (must be done after enabling chip DMA) */
1284 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1285 DMA_TX_MODE);
1286
1287 /* Enable interrupt */
1288
1289 register_bank(iobase, 0);
1290 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1291 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1292
1293 /* Enable transmit */
1294 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1295 }
1296
1297 /*
1298 * Function smsc_ircc_dma_xmit_complete (self)
1299 *
1300 * The transfer of a frame in finished. This function will only be called
1301 * by the interrupt handler
1302 *
1303 */
1304 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1305 {
1306 int iobase = self->io.fir_base;
1307
1308 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1309 #if 0
1310 /* Disable Tx */
1311 register_bank(iobase, 0);
1312 outb(0x00, iobase + IRCC_LCR_B);
1313 #endif
1314 register_bank(iobase, 1);
1315 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1316 iobase + IRCC_SCE_CFGB);
1317
1318 /* Check for underrun! */
1319 register_bank(iobase, 0);
1320 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1321 self->stats.tx_errors++;
1322 self->stats.tx_fifo_errors++;
1323
1324 /* Reset error condition */
1325 register_bank(iobase, 0);
1326 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1327 outb(0x00, iobase + IRCC_MASTER);
1328 } else {
1329 self->stats.tx_packets++;
1330 self->stats.tx_bytes += self->tx_buff.len;
1331 }
1332
1333 /* Check if it's time to change the speed */
1334 if (self->new_speed) {
1335 smsc_ircc_change_speed(self, self->new_speed);
1336 self->new_speed = 0;
1337 }
1338
1339 netif_wake_queue(self->netdev);
1340 }
1341
1342 /*
1343 * Function smsc_ircc_dma_receive(self)
1344 *
1345 * Get ready for receiving a frame. The device will initiate a DMA
1346 * if it starts to receive a frame.
1347 *
1348 */
1349 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1350 {
1351 int iobase = self->io.fir_base;
1352 #if 0
1353 /* Turn off chip DMA */
1354 register_bank(iobase, 1);
1355 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1356 iobase + IRCC_SCE_CFGB);
1357 #endif
1358
1359 /* Disable Tx */
1360 register_bank(iobase, 0);
1361 outb(0x00, iobase + IRCC_LCR_B);
1362
1363 /* Turn off chip DMA */
1364 register_bank(iobase, 1);
1365 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1366 iobase + IRCC_SCE_CFGB);
1367
1368 self->io.direction = IO_RECV;
1369 self->rx_buff.data = self->rx_buff.head;
1370
1371 /* Set max Rx frame size */
1372 register_bank(iobase, 4);
1373 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1374 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1375
1376 /* Setup DMA controller */
1377 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1378 DMA_RX_MODE);
1379
1380 /* Enable burst mode chip Rx DMA */
1381 register_bank(iobase, 1);
1382 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1383 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1384
1385 /* Enable interrupt */
1386 register_bank(iobase, 0);
1387 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1388 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1389
1390 /* Enable receiver */
1391 register_bank(iobase, 0);
1392 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1393 iobase + IRCC_LCR_B);
1394
1395 return 0;
1396 }
1397
1398 /*
1399 * Function smsc_ircc_dma_receive_complete(self)
1400 *
1401 * Finished with receiving frames
1402 *
1403 */
1404 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1405 {
1406 struct sk_buff *skb;
1407 int len, msgcnt, lsr;
1408 int iobase = self->io.fir_base;
1409
1410 register_bank(iobase, 0);
1411
1412 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1413 #if 0
1414 /* Disable Rx */
1415 register_bank(iobase, 0);
1416 outb(0x00, iobase + IRCC_LCR_B);
1417 #endif
1418 register_bank(iobase, 0);
1419 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1420 lsr= inb(iobase + IRCC_LSR);
1421 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1422
1423 IRDA_DEBUG(2, "%s: dma count = %d\n", __FUNCTION__,
1424 get_dma_residue(self->io.dma));
1425
1426 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1427
1428 /* Look for errors */
1429 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1430 self->stats.rx_errors++;
1431 if (lsr & IRCC_LSR_FRAME_ERROR)
1432 self->stats.rx_frame_errors++;
1433 if (lsr & IRCC_LSR_CRC_ERROR)
1434 self->stats.rx_crc_errors++;
1435 if (lsr & IRCC_LSR_SIZE_ERROR)
1436 self->stats.rx_length_errors++;
1437 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1438 self->stats.rx_length_errors++;
1439 return;
1440 }
1441
1442 /* Remove CRC */
1443 len -= self->io.speed < 4000000 ? 2 : 4;
1444
1445 if (len < 2 || len > 2050) {
1446 IRDA_WARNING("%s(), bogus len=%d\n", __FUNCTION__, len);
1447 return;
1448 }
1449 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
1450
1451 skb = dev_alloc_skb(len + 1);
1452 if (!skb) {
1453 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1454 __FUNCTION__);
1455 return;
1456 }
1457 /* Make sure IP header gets aligned */
1458 skb_reserve(skb, 1);
1459
1460 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1461 self->stats.rx_packets++;
1462 self->stats.rx_bytes += len;
1463
1464 skb->dev = self->netdev;
1465 skb_reset_mac_header(skb);
1466 skb->protocol = htons(ETH_P_IRDA);
1467 netif_rx(skb);
1468 }
1469
1470 /*
1471 * Function smsc_ircc_sir_receive (self)
1472 *
1473 * Receive one frame from the infrared port
1474 *
1475 */
1476 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1477 {
1478 int boguscount = 0;
1479 int iobase;
1480
1481 IRDA_ASSERT(self != NULL, return;);
1482
1483 iobase = self->io.sir_base;
1484
1485 /*
1486 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1487 * async_unwrap_char will deliver all found frames
1488 */
1489 do {
1490 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
1491 inb(iobase + UART_RX));
1492
1493 /* Make sure we don't stay here to long */
1494 if (boguscount++ > 32) {
1495 IRDA_DEBUG(2, "%s(), breaking!\n", __FUNCTION__);
1496 break;
1497 }
1498 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1499 }
1500
1501
1502 /*
1503 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1504 *
1505 * An interrupt from the chip has arrived. Time to do some work
1506 *
1507 */
1508 static irqreturn_t smsc_ircc_interrupt(int dummy, void *dev_id)
1509 {
1510 struct net_device *dev = dev_id;
1511 struct smsc_ircc_cb *self = netdev_priv(dev);
1512 int iobase, iir, lcra, lsr;
1513 irqreturn_t ret = IRQ_NONE;
1514
1515 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1516 spin_lock(&self->lock);
1517
1518 /* Check if we should use the SIR interrupt handler */
1519 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1520 ret = smsc_ircc_interrupt_sir(dev);
1521 goto irq_ret_unlock;
1522 }
1523
1524 iobase = self->io.fir_base;
1525
1526 register_bank(iobase, 0);
1527 iir = inb(iobase + IRCC_IIR);
1528 if (iir == 0)
1529 goto irq_ret_unlock;
1530 ret = IRQ_HANDLED;
1531
1532 /* Disable interrupts */
1533 outb(0, iobase + IRCC_IER);
1534 lcra = inb(iobase + IRCC_LCR_A);
1535 lsr = inb(iobase + IRCC_LSR);
1536
1537 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __FUNCTION__, iir);
1538
1539 if (iir & IRCC_IIR_EOM) {
1540 if (self->io.direction == IO_RECV)
1541 smsc_ircc_dma_receive_complete(self);
1542 else
1543 smsc_ircc_dma_xmit_complete(self);
1544
1545 smsc_ircc_dma_receive(self);
1546 }
1547
1548 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1549 /*printk(KERN_WARNING "%s(): Active Frame\n", __FUNCTION__);*/
1550 }
1551
1552 /* Enable interrupts again */
1553
1554 register_bank(iobase, 0);
1555 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1556
1557 irq_ret_unlock:
1558 spin_unlock(&self->lock);
1559
1560 return ret;
1561 }
1562
1563 /*
1564 * Function irport_interrupt_sir (irq, dev_id)
1565 *
1566 * Interrupt handler for SIR modes
1567 */
1568 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1569 {
1570 struct smsc_ircc_cb *self = netdev_priv(dev);
1571 int boguscount = 0;
1572 int iobase;
1573 int iir, lsr;
1574
1575 /* Already locked comming here in smsc_ircc_interrupt() */
1576 /*spin_lock(&self->lock);*/
1577
1578 iobase = self->io.sir_base;
1579
1580 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1581 if (iir == 0)
1582 return IRQ_NONE;
1583 while (iir) {
1584 /* Clear interrupt */
1585 lsr = inb(iobase + UART_LSR);
1586
1587 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1588 __FUNCTION__, iir, lsr, iobase);
1589
1590 switch (iir) {
1591 case UART_IIR_RLSI:
1592 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
1593 break;
1594 case UART_IIR_RDI:
1595 /* Receive interrupt */
1596 smsc_ircc_sir_receive(self);
1597 break;
1598 case UART_IIR_THRI:
1599 if (lsr & UART_LSR_THRE)
1600 /* Transmitter ready for data */
1601 smsc_ircc_sir_write_wakeup(self);
1602 break;
1603 default:
1604 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1605 __FUNCTION__, iir);
1606 break;
1607 }
1608
1609 /* Make sure we don't stay here to long */
1610 if (boguscount++ > 100)
1611 break;
1612
1613 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1614 }
1615 /*spin_unlock(&self->lock);*/
1616 return IRQ_HANDLED;
1617 }
1618
1619
1620 #if 0 /* unused */
1621 /*
1622 * Function ircc_is_receiving (self)
1623 *
1624 * Return TRUE is we are currently receiving a frame
1625 *
1626 */
1627 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1628 {
1629 int status = FALSE;
1630 /* int iobase; */
1631
1632 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1633
1634 IRDA_ASSERT(self != NULL, return FALSE;);
1635
1636 IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
1637 get_dma_residue(self->io.dma));
1638
1639 status = (self->rx_buff.state != OUTSIDE_FRAME);
1640
1641 return status;
1642 }
1643 #endif /* unused */
1644
1645 static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1646 {
1647 int error;
1648
1649 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1650 self->netdev->name, self->netdev);
1651 if (error)
1652 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1653 __FUNCTION__, self->io.irq, error);
1654
1655 return error;
1656 }
1657
1658 static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1659 {
1660 unsigned long flags;
1661
1662 spin_lock_irqsave(&self->lock, flags);
1663
1664 self->io.speed = 0;
1665 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1666
1667 spin_unlock_irqrestore(&self->lock, flags);
1668 }
1669
1670 static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1671 {
1672 int iobase = self->io.fir_base;
1673 unsigned long flags;
1674
1675 spin_lock_irqsave(&self->lock, flags);
1676
1677 register_bank(iobase, 0);
1678 outb(0, iobase + IRCC_IER);
1679 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1680 outb(0x00, iobase + IRCC_MASTER);
1681
1682 spin_unlock_irqrestore(&self->lock, flags);
1683 }
1684
1685
1686 /*
1687 * Function smsc_ircc_net_open (dev)
1688 *
1689 * Start the device
1690 *
1691 */
1692 static int smsc_ircc_net_open(struct net_device *dev)
1693 {
1694 struct smsc_ircc_cb *self;
1695 char hwname[16];
1696
1697 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1698
1699 IRDA_ASSERT(dev != NULL, return -1;);
1700 self = netdev_priv(dev);
1701 IRDA_ASSERT(self != NULL, return 0;);
1702
1703 if (self->io.suspended) {
1704 IRDA_DEBUG(0, "%s(), device is suspended\n", __FUNCTION__);
1705 return -EAGAIN;
1706 }
1707
1708 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1709 (void *) dev)) {
1710 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1711 __FUNCTION__, self->io.irq);
1712 return -EAGAIN;
1713 }
1714
1715 smsc_ircc_start_interrupts(self);
1716
1717 /* Give self a hardware name */
1718 /* It would be cool to offer the chip revision here - Jean II */
1719 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1720
1721 /*
1722 * Open new IrLAP layer instance, now that everything should be
1723 * initialized properly
1724 */
1725 self->irlap = irlap_open(dev, &self->qos, hwname);
1726
1727 /*
1728 * Always allocate the DMA channel after the IRQ,
1729 * and clean up on failure.
1730 */
1731 if (request_dma(self->io.dma, dev->name)) {
1732 smsc_ircc_net_close(dev);
1733
1734 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1735 __FUNCTION__, self->io.dma);
1736 return -EAGAIN;
1737 }
1738
1739 netif_start_queue(dev);
1740
1741 return 0;
1742 }
1743
1744 /*
1745 * Function smsc_ircc_net_close (dev)
1746 *
1747 * Stop the device
1748 *
1749 */
1750 static int smsc_ircc_net_close(struct net_device *dev)
1751 {
1752 struct smsc_ircc_cb *self;
1753
1754 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1755
1756 IRDA_ASSERT(dev != NULL, return -1;);
1757 self = netdev_priv(dev);
1758 IRDA_ASSERT(self != NULL, return 0;);
1759
1760 /* Stop device */
1761 netif_stop_queue(dev);
1762
1763 /* Stop and remove instance of IrLAP */
1764 if (self->irlap)
1765 irlap_close(self->irlap);
1766 self->irlap = NULL;
1767
1768 smsc_ircc_stop_interrupts(self);
1769
1770 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1771 if (!self->io.suspended)
1772 free_irq(self->io.irq, dev);
1773
1774 disable_dma(self->io.dma);
1775 free_dma(self->io.dma);
1776
1777 return 0;
1778 }
1779
1780 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
1781 {
1782 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1783
1784 if (!self->io.suspended) {
1785 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1786
1787 rtnl_lock();
1788 if (netif_running(self->netdev)) {
1789 netif_device_detach(self->netdev);
1790 smsc_ircc_stop_interrupts(self);
1791 free_irq(self->io.irq, self->netdev);
1792 disable_dma(self->io.dma);
1793 }
1794 self->io.suspended = 1;
1795 rtnl_unlock();
1796 }
1797
1798 return 0;
1799 }
1800
1801 static int smsc_ircc_resume(struct platform_device *dev)
1802 {
1803 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1804
1805 if (self->io.suspended) {
1806 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1807
1808 rtnl_lock();
1809 smsc_ircc_init_chip(self);
1810 if (netif_running(self->netdev)) {
1811 if (smsc_ircc_request_irq(self)) {
1812 /*
1813 * Don't fail resume process, just kill this
1814 * network interface
1815 */
1816 unregister_netdevice(self->netdev);
1817 } else {
1818 enable_dma(self->io.dma);
1819 smsc_ircc_start_interrupts(self);
1820 netif_device_attach(self->netdev);
1821 }
1822 }
1823 self->io.suspended = 0;
1824 rtnl_unlock();
1825 }
1826 return 0;
1827 }
1828
1829 /*
1830 * Function smsc_ircc_close (self)
1831 *
1832 * Close driver instance
1833 *
1834 */
1835 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1836 {
1837 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1838
1839 IRDA_ASSERT(self != NULL, return -1;);
1840
1841 platform_device_unregister(self->pldev);
1842
1843 /* Remove netdevice */
1844 unregister_netdev(self->netdev);
1845
1846 smsc_ircc_stop_interrupts(self);
1847
1848 /* Release the PORTS that this driver is using */
1849 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1850 self->io.fir_base);
1851
1852 release_region(self->io.fir_base, self->io.fir_ext);
1853
1854 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1855 self->io.sir_base);
1856
1857 release_region(self->io.sir_base, self->io.sir_ext);
1858
1859 if (self->tx_buff.head)
1860 dma_free_coherent(NULL, self->tx_buff.truesize,
1861 self->tx_buff.head, self->tx_buff_dma);
1862
1863 if (self->rx_buff.head)
1864 dma_free_coherent(NULL, self->rx_buff.truesize,
1865 self->rx_buff.head, self->rx_buff_dma);
1866
1867 free_netdev(self->netdev);
1868
1869 return 0;
1870 }
1871
1872 static void __exit smsc_ircc_cleanup(void)
1873 {
1874 int i;
1875
1876 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1877
1878 for (i = 0; i < 2; i++) {
1879 if (dev_self[i])
1880 smsc_ircc_close(dev_self[i]);
1881 }
1882
1883 if (pnp_driver_registered)
1884 pnp_unregister_driver(&smsc_ircc_pnp_driver);
1885
1886 platform_driver_unregister(&smsc_ircc_driver);
1887 }
1888
1889 /*
1890 * Start SIR operations
1891 *
1892 * This function *must* be called with spinlock held, because it may
1893 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1894 */
1895 void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1896 {
1897 struct net_device *dev;
1898 int fir_base, sir_base;
1899
1900 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1901
1902 IRDA_ASSERT(self != NULL, return;);
1903 dev = self->netdev;
1904 IRDA_ASSERT(dev != NULL, return;);
1905 dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
1906
1907 fir_base = self->io.fir_base;
1908 sir_base = self->io.sir_base;
1909
1910 /* Reset everything */
1911 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1912
1913 #if SMSC_IRCC2_C_SIR_STOP
1914 /*smsc_ircc_sir_stop(self);*/
1915 #endif
1916
1917 register_bank(fir_base, 1);
1918 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1919
1920 /* Initialize UART */
1921 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1922 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1923
1924 /* Turn on interrups */
1925 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1926
1927 IRDA_DEBUG(3, "%s() - exit\n", __FUNCTION__);
1928
1929 outb(0x00, fir_base + IRCC_MASTER);
1930 }
1931
1932 #if SMSC_IRCC2_C_SIR_STOP
1933 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1934 {
1935 int iobase;
1936
1937 IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1938 iobase = self->io.sir_base;
1939
1940 /* Reset UART */
1941 outb(0, iobase + UART_MCR);
1942
1943 /* Turn off interrupts */
1944 outb(0, iobase + UART_IER);
1945 }
1946 #endif
1947
1948 /*
1949 * Function smsc_sir_write_wakeup (self)
1950 *
1951 * Called by the SIR interrupt handler when there's room for more data.
1952 * If we have more packets to send, we send them here.
1953 *
1954 */
1955 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1956 {
1957 int actual = 0;
1958 int iobase;
1959 int fcr;
1960
1961 IRDA_ASSERT(self != NULL, return;);
1962
1963 IRDA_DEBUG(4, "%s\n", __FUNCTION__);
1964
1965 iobase = self->io.sir_base;
1966
1967 /* Finished with frame? */
1968 if (self->tx_buff.len > 0) {
1969 /* Write data left in transmit buffer */
1970 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1971 self->tx_buff.data, self->tx_buff.len);
1972 self->tx_buff.data += actual;
1973 self->tx_buff.len -= actual;
1974 } else {
1975
1976 /*if (self->tx_buff.len ==0) {*/
1977
1978 /*
1979 * Now serial buffer is almost free & we can start
1980 * transmission of another packet. But first we must check
1981 * if we need to change the speed of the hardware
1982 */
1983 if (self->new_speed) {
1984 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1985 __FUNCTION__, self->new_speed);
1986 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1987 smsc_ircc_change_speed(self, self->new_speed);
1988 self->new_speed = 0;
1989 } else {
1990 /* Tell network layer that we want more frames */
1991 netif_wake_queue(self->netdev);
1992 }
1993 self->stats.tx_packets++;
1994
1995 if (self->io.speed <= 115200) {
1996 /*
1997 * Reset Rx FIFO to make sure that all reflected transmit data
1998 * is discarded. This is needed for half duplex operation
1999 */
2000 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
2001 fcr |= self->io.speed < 38400 ?
2002 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
2003
2004 outb(fcr, iobase + UART_FCR);
2005
2006 /* Turn on receive interrupts */
2007 outb(UART_IER_RDI, iobase + UART_IER);
2008 }
2009 }
2010 }
2011
2012 /*
2013 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
2014 *
2015 * Fill Tx FIFO with transmit data
2016 *
2017 */
2018 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
2019 {
2020 int actual = 0;
2021
2022 /* Tx FIFO should be empty! */
2023 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
2024 IRDA_WARNING("%s(), failed, fifo not empty!\n", __FUNCTION__);
2025 return 0;
2026 }
2027
2028 /* Fill FIFO with current frame */
2029 while (fifo_size-- > 0 && actual < len) {
2030 /* Transmit next byte */
2031 outb(buf[actual], iobase + UART_TX);
2032 actual++;
2033 }
2034 return actual;
2035 }
2036
2037 /*
2038 * Function smsc_ircc_is_receiving (self)
2039 *
2040 * Returns true is we are currently receiving data
2041 *
2042 */
2043 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
2044 {
2045 return (self->rx_buff.state != OUTSIDE_FRAME);
2046 }
2047
2048
2049 /*
2050 * Function smsc_ircc_probe_transceiver(self)
2051 *
2052 * Tries to find the used Transceiver
2053 *
2054 */
2055 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
2056 {
2057 unsigned int i;
2058
2059 IRDA_ASSERT(self != NULL, return;);
2060
2061 for (i = 0; smsc_transceivers[i].name != NULL; i++)
2062 if (smsc_transceivers[i].probe(self->io.fir_base)) {
2063 IRDA_MESSAGE(" %s transceiver found\n",
2064 smsc_transceivers[i].name);
2065 self->transceiver= i + 1;
2066 return;
2067 }
2068
2069 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
2070 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
2071
2072 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
2073 }
2074
2075
2076 /*
2077 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
2078 *
2079 * Set the transceiver according to the speed
2080 *
2081 */
2082 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
2083 {
2084 unsigned int trx;
2085
2086 trx = self->transceiver;
2087 if (trx > 0)
2088 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
2089 }
2090
2091 /*
2092 * Function smsc_ircc_wait_hw_transmitter_finish ()
2093 *
2094 * Wait for the real end of HW transmission
2095 *
2096 * The UART is a strict FIFO, and we get called only when we have finished
2097 * pushing data to the FIFO, so the maximum amount of time we must wait
2098 * is only for the FIFO to drain out.
2099 *
2100 * We use a simple calibrated loop. We may need to adjust the loop
2101 * delay (udelay) to balance I/O traffic and latency. And we also need to
2102 * adjust the maximum timeout.
2103 * It would probably be better to wait for the proper interrupt,
2104 * but it doesn't seem to be available.
2105 *
2106 * We can't use jiffies or kernel timers because :
2107 * 1) We are called from the interrupt handler, which disable softirqs,
2108 * so jiffies won't be increased
2109 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2110 * want to wait that long to detect stuck hardware.
2111 * Jean II
2112 */
2113
2114 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2115 {
2116 int iobase = self->io.sir_base;
2117 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2118
2119 /* Calibrated busy loop */
2120 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2121 udelay(1);
2122
2123 if (count == 0)
2124 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__);
2125 }
2126
2127
2128 /* PROBING
2129 *
2130 * REVISIT we can be told about the device by PNP, and should use that info
2131 * instead of probing hardware and creating a platform_device ...
2132 */
2133
2134 static int __init smsc_ircc_look_for_chips(void)
2135 {
2136 struct smsc_chip_address *address;
2137 char *type;
2138 unsigned int cfg_base, found;
2139
2140 found = 0;
2141 address = possible_addresses;
2142
2143 while (address->cfg_base) {
2144 cfg_base = address->cfg_base;
2145
2146 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __FUNCTION__, cfg_base, address->type);*/
2147
2148 if (address->type & SMSCSIO_TYPE_FDC) {
2149 type = "FDC";
2150 if (address->type & SMSCSIO_TYPE_FLAT)
2151 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2152 found++;
2153
2154 if (address->type & SMSCSIO_TYPE_PAGED)
2155 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2156 found++;
2157 }
2158 if (address->type & SMSCSIO_TYPE_LPC) {
2159 type = "LPC";
2160 if (address->type & SMSCSIO_TYPE_FLAT)
2161 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2162 found++;
2163
2164 if (address->type & SMSCSIO_TYPE_PAGED)
2165 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2166 found++;
2167 }
2168 address++;
2169 }
2170 return found;
2171 }
2172
2173 /*
2174 * Function smsc_superio_flat (chip, base, type)
2175 *
2176 * Try to get configuration of a smc SuperIO chip with flat register model
2177 *
2178 */
2179 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2180 {
2181 unsigned short firbase, sirbase;
2182 u8 mode, dma, irq;
2183 int ret = -ENODEV;
2184
2185 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2186
2187 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2188 return ret;
2189
2190 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2191 mode = inb(cfgbase + 1);
2192
2193 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __FUNCTION__, mode);*/
2194
2195 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2196 IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
2197
2198 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2199 sirbase = inb(cfgbase + 1) << 2;
2200
2201 /* FIR iobase */
2202 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2203 firbase = inb(cfgbase + 1) << 3;
2204
2205 /* DMA */
2206 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2207 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2208
2209 /* IRQ */
2210 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2211 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2212
2213 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __FUNCTION__, firbase, sirbase, dma, irq, mode);
2214
2215 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2216 ret = 0;
2217
2218 /* Exit configuration */
2219 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2220
2221 return ret;
2222 }
2223
2224 /*
2225 * Function smsc_superio_paged (chip, base, type)
2226 *
2227 * Try to get configuration of a smc SuperIO chip with paged register model
2228 *
2229 */
2230 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2231 {
2232 unsigned short fir_io, sir_io;
2233 int ret = -ENODEV;
2234
2235 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2236
2237 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2238 return ret;
2239
2240 /* Select logical device (UART2) */
2241 outb(0x07, cfg_base);
2242 outb(0x05, cfg_base + 1);
2243
2244 /* SIR iobase */
2245 outb(0x60, cfg_base);
2246 sir_io = inb(cfg_base + 1) << 8;
2247 outb(0x61, cfg_base);
2248 sir_io |= inb(cfg_base + 1);
2249
2250 /* Read FIR base */
2251 outb(0x62, cfg_base);
2252 fir_io = inb(cfg_base + 1) << 8;
2253 outb(0x63, cfg_base);
2254 fir_io |= inb(cfg_base + 1);
2255 outb(0x2b, cfg_base); /* ??? */
2256
2257 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2258 ret = 0;
2259
2260 /* Exit configuration */
2261 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2262
2263 return ret;
2264 }
2265
2266
2267 static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2268 {
2269 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2270
2271 outb(reg, cfg_base);
2272 return inb(cfg_base) != reg ? -1 : 0;
2273 }
2274
2275 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2276 {
2277 u8 devid, xdevid, rev;
2278
2279 IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2280
2281 /* Leave configuration */
2282
2283 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2284
2285 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2286 return NULL;
2287
2288 outb(reg, cfg_base);
2289
2290 xdevid = inb(cfg_base + 1);
2291
2292 /* Enter configuration */
2293
2294 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2295
2296 #if 0
2297 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2298 return NULL;
2299 #endif
2300
2301 /* probe device ID */
2302
2303 if (smsc_access(cfg_base, reg))
2304 return NULL;
2305
2306 devid = inb(cfg_base + 1);
2307
2308 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2309 return NULL;
2310
2311 /* probe revision ID */
2312
2313 if (smsc_access(cfg_base, reg + 1))
2314 return NULL;
2315
2316 rev = inb(cfg_base + 1);
2317
2318 if (rev >= 128) /* i think this will make no sense */
2319 return NULL;
2320
2321 if (devid == xdevid) /* protection against false positives */
2322 return NULL;
2323
2324 /* Check for expected device ID; are there others? */
2325
2326 while (chip->devid != devid) {
2327
2328 chip++;
2329
2330 if (chip->name == NULL)
2331 return NULL;
2332 }
2333
2334 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2335 devid, rev, cfg_base, type, chip->name);
2336
2337 if (chip->rev > rev) {
2338 IRDA_MESSAGE("Revision higher than expected\n");
2339 return NULL;
2340 }
2341
2342 if (chip->flags & NoIRDA)
2343 IRDA_MESSAGE("chipset does not support IRDA\n");
2344
2345 return chip;
2346 }
2347
2348 static int __init smsc_superio_fdc(unsigned short cfg_base)
2349 {
2350 int ret = -1;
2351
2352 if (!request_region(cfg_base, 2, driver_name)) {
2353 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2354 __FUNCTION__, cfg_base);
2355 } else {
2356 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2357 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2358 ret = 0;
2359
2360 release_region(cfg_base, 2);
2361 }
2362
2363 return ret;
2364 }
2365
2366 static int __init smsc_superio_lpc(unsigned short cfg_base)
2367 {
2368 int ret = -1;
2369
2370 if (!request_region(cfg_base, 2, driver_name)) {
2371 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2372 __FUNCTION__, cfg_base);
2373 } else {
2374 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2375 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2376 ret = 0;
2377
2378 release_region(cfg_base, 2);
2379 }
2380 return ret;
2381 }
2382
2383 /*
2384 * Look for some specific subsystem setups that need
2385 * pre-configuration not properly done by the BIOS (especially laptops)
2386 * This code is based in part on smcinit.c, tosh1800-smcinit.c
2387 * and tosh2450-smcinit.c. The table lists the device entries
2388 * for ISA bridges with an LPC (Low Pin Count) controller which
2389 * handles the communication with the SMSC device. After the LPC
2390 * controller is initialized through PCI, the SMSC device is initialized
2391 * through a dedicated port in the ISA port-mapped I/O area, this latter
2392 * area is used to configure the SMSC device with default
2393 * SIR and FIR I/O ports, DMA and IRQ. Different vendors have
2394 * used different sets of parameters and different control port
2395 * addresses making a subsystem device table necessary.
2396 */
2397 #ifdef CONFIG_PCI
2398 #define PCIID_VENDOR_INTEL 0x8086
2399 #define PCIID_VENDOR_ALI 0x10b9
2400 static struct smsc_ircc_subsystem_configuration subsystem_configurations[] __initdata = {
2401 /*
2402 * Subsystems needing entries:
2403 * 0x10b9:0x1533 0x103c:0x0850 HP nx9010 family
2404 * 0x10b9:0x1533 0x0e11:0x005a Compaq nc4000 family
2405 * 0x8086:0x24cc 0x0e11:0x002a HP nx9000 family
2406 */
2407 {
2408 /* Guessed entry */
2409 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2410 .device = 0x24cc,
2411 .subvendor = 0x103c,
2412 .subdevice = 0x08bc,
2413 .sir_io = 0x02f8,
2414 .fir_io = 0x0130,
2415 .fir_irq = 0x05,
2416 .fir_dma = 0x03,
2417 .cfg_base = 0x004e,
2418 .preconfigure = preconfigure_through_82801,
2419 .name = "HP nx5000 family",
2420 },
2421 {
2422 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2423 .device = 0x24cc,
2424 .subvendor = 0x103c,
2425 .subdevice = 0x088c,
2426 /* Quite certain these are the same for nc8000 as for nc6000 */
2427 .sir_io = 0x02f8,
2428 .fir_io = 0x0130,
2429 .fir_irq = 0x05,
2430 .fir_dma = 0x03,
2431 .cfg_base = 0x004e,
2432 .preconfigure = preconfigure_through_82801,
2433 .name = "HP nc8000 family",
2434 },
2435 {
2436 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2437 .device = 0x24cc,
2438 .subvendor = 0x103c,
2439 .subdevice = 0x0890,
2440 .sir_io = 0x02f8,
2441 .fir_io = 0x0130,
2442 .fir_irq = 0x05,
2443 .fir_dma = 0x03,
2444 .cfg_base = 0x004e,
2445 .preconfigure = preconfigure_through_82801,
2446 .name = "HP nc6000 family",
2447 },
2448 {
2449 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2450 .device = 0x24cc,
2451 .subvendor = 0x0e11,
2452 .subdevice = 0x0860,
2453 /* I assume these are the same for x1000 as for the others */
2454 .sir_io = 0x02e8,
2455 .fir_io = 0x02f8,
2456 .fir_irq = 0x07,
2457 .fir_dma = 0x03,
2458 .cfg_base = 0x002e,
2459 .preconfigure = preconfigure_through_82801,
2460 .name = "Compaq x1000 family",
2461 },
2462 {
2463 /* Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge */
2464 .vendor = PCIID_VENDOR_INTEL,
2465 .device = 0x24c0,
2466 .subvendor = 0x1179,
2467 .subdevice = 0xffff, /* 0xffff is "any" */
2468 .sir_io = 0x03f8,
2469 .fir_io = 0x0130,
2470 .fir_irq = 0x07,
2471 .fir_dma = 0x01,
2472 .cfg_base = 0x002e,
2473 .preconfigure = preconfigure_through_82801,
2474 .name = "Toshiba laptop with Intel 82801DB/DBL LPC bridge",
2475 },
2476 {
2477 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801CAM ISA bridge */
2478 .device = 0x248c,
2479 .subvendor = 0x1179,
2480 .subdevice = 0xffff, /* 0xffff is "any" */
2481 .sir_io = 0x03f8,
2482 .fir_io = 0x0130,
2483 .fir_irq = 0x03,
2484 .fir_dma = 0x03,
2485 .cfg_base = 0x002e,
2486 .preconfigure = preconfigure_through_82801,
2487 .name = "Toshiba laptop with Intel 82801CAM ISA bridge",
2488 },
2489 {
2490 /* 82801DBM (ICH4-M) LPC Interface Bridge */
2491 .vendor = PCIID_VENDOR_INTEL,
2492 .device = 0x24cc,
2493 .subvendor = 0x1179,
2494 .subdevice = 0xffff, /* 0xffff is "any" */
2495 .sir_io = 0x03f8,
2496 .fir_io = 0x0130,
2497 .fir_irq = 0x03,
2498 .fir_dma = 0x03,
2499 .cfg_base = 0x002e,
2500 .preconfigure = preconfigure_through_82801,
2501 .name = "Toshiba laptop with Intel 8281DBM LPC bridge",
2502 },
2503 {
2504 /* ALi M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] */
2505 .vendor = PCIID_VENDOR_ALI,
2506 .device = 0x1533,
2507 .subvendor = 0x1179,
2508 .subdevice = 0xffff, /* 0xffff is "any" */
2509 .sir_io = 0x02e8,
2510 .fir_io = 0x02f8,
2511 .fir_irq = 0x07,
2512 .fir_dma = 0x03,
2513 .cfg_base = 0x002e,
2514 .preconfigure = preconfigure_through_ali,
2515 .name = "Toshiba laptop with ALi ISA bridge",
2516 },
2517 { } // Terminator
2518 };
2519
2520
2521 /*
2522 * This sets up the basic SMSC parameters
2523 * (FIR port, SIR port, FIR DMA, FIR IRQ)
2524 * through the chip configuration port.
2525 */
2526 static int __init preconfigure_smsc_chip(struct
2527 smsc_ircc_subsystem_configuration
2528 *conf)
2529 {
2530 unsigned short iobase = conf->cfg_base;
2531 unsigned char tmpbyte;
2532
2533 outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state
2534 outb(SMSCSIOFLAT_DEVICEID_REG, iobase); // set for device ID
2535 tmpbyte = inb(iobase +1); // Read device ID
2536 IRDA_DEBUG(0,
2537 "Detected Chip id: 0x%02x, setting up registers...\n",
2538 tmpbyte);
2539
2540 /* Disable UART1 and set up SIR I/O port */
2541 outb(0x24, iobase); // select CR24 - UART1 base addr
2542 outb(0x00, iobase + 1); // disable UART1
2543 outb(SMSCSIOFLAT_UART2BASEADDR_REG, iobase); // select CR25 - UART2 base addr
2544 outb( (conf->sir_io >> 2), iobase + 1); // bits 2-9 of 0x3f8
2545 tmpbyte = inb(iobase + 1);
2546 if (tmpbyte != (conf->sir_io >> 2) ) {
2547 IRDA_WARNING("ERROR: could not configure SIR ioport.\n");
2548 IRDA_WARNING("Try to supply ircc_cfg argument.\n");
2549 return -ENXIO;
2550 }
2551
2552 /* Set up FIR IRQ channel for UART2 */
2553 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, iobase); // select CR28 - UART1,2 IRQ select
2554 tmpbyte = inb(iobase + 1);
2555 tmpbyte &= SMSCSIOFLAT_UART1IRQSELECT_MASK; // Do not touch the UART1 portion
2556 tmpbyte |= (conf->fir_irq & SMSCSIOFLAT_UART2IRQSELECT_MASK);
2557 outb(tmpbyte, iobase + 1);
2558 tmpbyte = inb(iobase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2559 if (tmpbyte != conf->fir_irq) {
2560 IRDA_WARNING("ERROR: could not configure FIR IRQ channel.\n");
2561 return -ENXIO;
2562 }
2563
2564 /* Set up FIR I/O port */
2565 outb(SMSCSIOFLAT_FIRBASEADDR_REG, iobase); // CR2B - SCE (FIR) base addr
2566 outb((conf->fir_io >> 3), iobase + 1);
2567 tmpbyte = inb(iobase + 1);
2568 if (tmpbyte != (conf->fir_io >> 3) ) {
2569 IRDA_WARNING("ERROR: could not configure FIR I/O port.\n");
2570 return -ENXIO;
2571 }
2572
2573 /* Set up FIR DMA channel */
2574 outb(SMSCSIOFLAT_FIRDMASELECT_REG, iobase); // CR2C - SCE (FIR) DMA select
2575 outb((conf->fir_dma & LPC47N227_FIRDMASELECT_MASK), iobase + 1); // DMA
2576 tmpbyte = inb(iobase + 1) & LPC47N227_FIRDMASELECT_MASK;
2577 if (tmpbyte != (conf->fir_dma & LPC47N227_FIRDMASELECT_MASK)) {
2578 IRDA_WARNING("ERROR: could not configure FIR DMA channel.\n");
2579 return -ENXIO;
2580 }
2581
2582 outb(SMSCSIOFLAT_UARTMODE0C_REG, iobase); // CR0C - UART mode
2583 tmpbyte = inb(iobase + 1);
2584 tmpbyte &= ~SMSCSIOFLAT_UART2MODE_MASK |
2585 SMSCSIOFLAT_UART2MODE_VAL_IRDA;
2586 outb(tmpbyte, iobase + 1); // enable IrDA (HPSIR) mode, high speed
2587
2588 outb(LPC47N227_APMBOOTDRIVE_REG, iobase); // CR07 - Auto Pwr Mgt/boot drive sel
2589 tmpbyte = inb(iobase + 1);
2590 outb(tmpbyte | LPC47N227_UART2AUTOPWRDOWN_MASK, iobase + 1); // enable UART2 autopower down
2591
2592 /* This one was not part of tosh1800 */
2593 outb(0x0a, iobase); // CR0a - ecp fifo / ir mux
2594 tmpbyte = inb(iobase + 1);
2595 outb(tmpbyte | 0x40, iobase + 1); // send active device to ir port
2596
2597 outb(LPC47N227_UART12POWER_REG, iobase); // CR02 - UART 1,2 power
2598 tmpbyte = inb(iobase + 1);
2599 outb(tmpbyte | LPC47N227_UART2POWERDOWN_MASK, iobase + 1); // UART2 power up mode, UART1 power down
2600
2601 outb(LPC47N227_FDCPOWERVALIDCONF_REG, iobase); // CR00 - FDC Power/valid config cycle
2602 tmpbyte = inb(iobase + 1);
2603 outb(tmpbyte | LPC47N227_VALID_MASK, iobase + 1); // valid config cycle done
2604
2605 outb(LPC47N227_CFGEXITKEY, iobase); // Exit configuration
2606
2607 return 0;
2608 }
2609
2610 /* 82801CAM generic registers */
2611 #define VID 0x00
2612 #define DID 0x02
2613 #define PIRQ_A_D_ROUT 0x60
2614 #define SIRQ_CNTL 0x64
2615 #define PIRQ_E_H_ROUT 0x68
2616 #define PCI_DMA_C 0x90
2617 /* LPC-specific registers */
2618 #define COM_DEC 0xe0
2619 #define GEN1_DEC 0xe4
2620 #define LPC_EN 0xe6
2621 #define GEN2_DEC 0xec
2622 /*
2623 * Sets up the I/O range using the 82801CAM ISA bridge, 82801DBM LPC bridge
2624 * or Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge.
2625 * They all work the same way!
2626 */
2627 static int __init preconfigure_through_82801(struct pci_dev *dev,
2628 struct
2629 smsc_ircc_subsystem_configuration
2630 *conf)
2631 {
2632 unsigned short tmpword;
2633 unsigned char tmpbyte;
2634
2635 IRDA_MESSAGE("Setting up Intel 82801 controller and SMSC device\n");
2636 /*
2637 * Select the range for the COMA COM port (SIR)
2638 * Register COM_DEC:
2639 * Bit 7: reserved
2640 * Bit 6-4, COMB decode range
2641 * Bit 3: reserved
2642 * Bit 2-0, COMA decode range
2643 *
2644 * Decode ranges:
2645 * 000 = 0x3f8-0x3ff (COM1)
2646 * 001 = 0x2f8-0x2ff (COM2)
2647 * 010 = 0x220-0x227
2648 * 011 = 0x228-0x22f
2649 * 100 = 0x238-0x23f
2650 * 101 = 0x2e8-0x2ef (COM4)
2651 * 110 = 0x338-0x33f
2652 * 111 = 0x3e8-0x3ef (COM3)
2653 */
2654 pci_read_config_byte(dev, COM_DEC, &tmpbyte);
2655 tmpbyte &= 0xf8; /* mask COMA bits */
2656 switch(conf->sir_io) {
2657 case 0x3f8:
2658 tmpbyte |= 0x00;
2659 break;
2660 case 0x2f8:
2661 tmpbyte |= 0x01;
2662 break;
2663 case 0x220:
2664 tmpbyte |= 0x02;
2665 break;
2666 case 0x228:
2667 tmpbyte |= 0x03;
2668 break;
2669 case 0x238:
2670 tmpbyte |= 0x04;
2671 break;
2672 case 0x2e8:
2673 tmpbyte |= 0x05;
2674 break;
2675 case 0x338:
2676 tmpbyte |= 0x06;
2677 break;
2678 case 0x3e8:
2679 tmpbyte |= 0x07;
2680 break;
2681 default:
2682 tmpbyte |= 0x01; /* COM2 default */
2683 }
2684 IRDA_DEBUG(1, "COM_DEC (write): 0x%02x\n", tmpbyte);
2685 pci_write_config_byte(dev, COM_DEC, tmpbyte);
2686
2687 /* Enable Low Pin Count interface */
2688 pci_read_config_word(dev, LPC_EN, &tmpword);
2689 /* These seem to be set up at all times,
2690 * just make sure it is properly set.
2691 */
2692 switch(conf->cfg_base) {
2693 case 0x04e:
2694 tmpword |= 0x2000;
2695 break;
2696 case 0x02e:
2697 tmpword |= 0x1000;
2698 break;
2699 case 0x062:
2700 tmpword |= 0x0800;
2701 break;
2702 case 0x060:
2703 tmpword |= 0x0400;
2704 break;
2705 default:
2706 IRDA_WARNING("Uncommon I/O base address: 0x%04x\n",
2707 conf->cfg_base);
2708 break;
2709 }
2710 tmpword &= 0xfffd; /* disable LPC COMB */
2711 tmpword |= 0x0001; /* set bit 0 : enable LPC COMA addr range (GEN2) */
2712 IRDA_DEBUG(1, "LPC_EN (write): 0x%04x\n", tmpword);
2713 pci_write_config_word(dev, LPC_EN, tmpword);
2714
2715 /*
2716 * Configure LPC DMA channel
2717 * PCI_DMA_C bits:
2718 * Bit 15-14: DMA channel 7 select
2719 * Bit 13-12: DMA channel 6 select
2720 * Bit 11-10: DMA channel 5 select
2721 * Bit 9-8: Reserved
2722 * Bit 7-6: DMA channel 3 select
2723 * Bit 5-4: DMA channel 2 select
2724 * Bit 3-2: DMA channel 1 select
2725 * Bit 1-0: DMA channel 0 select
2726 * 00 = Reserved value
2727 * 01 = PC/PCI DMA
2728 * 10 = Reserved value
2729 * 11 = LPC I/F DMA
2730 */
2731 pci_read_config_word(dev, PCI_DMA_C, &tmpword);
2732 switch(conf->fir_dma) {
2733 case 0x07:
2734 tmpword |= 0xc000;
2735 break;
2736 case 0x06:
2737 tmpword |= 0x3000;
2738 break;
2739 case 0x05:
2740 tmpword |= 0x0c00;
2741 break;
2742 case 0x03:
2743 tmpword |= 0x00c0;
2744 break;
2745 case 0x02:
2746 tmpword |= 0x0030;
2747 break;
2748 case 0x01:
2749 tmpword |= 0x000c;
2750 break;
2751 case 0x00:
2752 tmpword |= 0x0003;
2753 break;
2754 default:
2755 break; /* do not change settings */
2756 }
2757 IRDA_DEBUG(1, "PCI_DMA_C (write): 0x%04x\n", tmpword);
2758 pci_write_config_word(dev, PCI_DMA_C, tmpword);
2759
2760 /*
2761 * GEN2_DEC bits:
2762 * Bit 15-4: Generic I/O range
2763 * Bit 3-1: reserved (read as 0)
2764 * Bit 0: enable GEN2 range on LPC I/F
2765 */
2766 tmpword = conf->fir_io & 0xfff8;
2767 tmpword |= 0x0001;
2768 IRDA_DEBUG(1, "GEN2_DEC (write): 0x%04x\n", tmpword);
2769 pci_write_config_word(dev, GEN2_DEC, tmpword);
2770
2771 /* Pre-configure chip */
2772 return preconfigure_smsc_chip(conf);
2773 }
2774
2775 /*
2776 * Pre-configure a certain port on the ALi 1533 bridge.
2777 * This is based on reverse-engineering since ALi does not
2778 * provide any data sheet for the 1533 chip.
2779 */
2780 static void __init preconfigure_ali_port(struct pci_dev *dev,
2781 unsigned short port)
2782 {
2783 unsigned char reg;
2784 /* These bits obviously control the different ports */
2785 unsigned char mask;
2786 unsigned char tmpbyte;
2787
2788 switch(port) {
2789 case 0x0130:
2790 case 0x0178:
2791 reg = 0xb0;
2792 mask = 0x80;
2793 break;
2794 case 0x03f8:
2795 reg = 0xb4;
2796 mask = 0x80;
2797 break;
2798 case 0x02f8:
2799 reg = 0xb4;
2800 mask = 0x30;
2801 break;
2802 case 0x02e8:
2803 reg = 0xb4;
2804 mask = 0x08;
2805 break;
2806 default:
2807 IRDA_ERROR("Failed to configure unsupported port on ALi 1533 bridge: 0x%04x\n", port);
2808 return;
2809 }
2810
2811 pci_read_config_byte(dev, reg, &tmpbyte);
2812 /* Turn on the right bits */
2813 tmpbyte |= mask;
2814 pci_write_config_byte(dev, reg, tmpbyte);
2815 IRDA_MESSAGE("Activated ALi 1533 ISA bridge port 0x%04x.\n", port);
2816 return;
2817 }
2818
2819 static int __init preconfigure_through_ali(struct pci_dev *dev,
2820 struct
2821 smsc_ircc_subsystem_configuration
2822 *conf)
2823 {
2824 /* Configure the two ports on the ALi 1533 */
2825 preconfigure_ali_port(dev, conf->sir_io);
2826 preconfigure_ali_port(dev, conf->fir_io);
2827
2828 /* Pre-configure chip */
2829 return preconfigure_smsc_chip(conf);
2830 }
2831
2832 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
2833 unsigned short ircc_fir,
2834 unsigned short ircc_sir,
2835 unsigned char ircc_dma,
2836 unsigned char ircc_irq)
2837 {
2838 struct pci_dev *dev = NULL;
2839 unsigned short ss_vendor = 0x0000;
2840 unsigned short ss_device = 0x0000;
2841 int ret = 0;
2842
2843 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2844
2845 while (dev != NULL) {
2846 struct smsc_ircc_subsystem_configuration *conf;
2847
2848 /*
2849 * Cache the subsystem vendor/device:
2850 * some manufacturers fail to set this for all components,
2851 * so we save it in case there is just 0x0000 0x0000 on the
2852 * device we want to check.
2853 */
2854 if (dev->subsystem_vendor != 0x0000U) {
2855 ss_vendor = dev->subsystem_vendor;
2856 ss_device = dev->subsystem_device;
2857 }
2858 conf = subsystem_configurations;
2859 for( ; conf->subvendor; conf++) {
2860 if(conf->vendor == dev->vendor &&
2861 conf->device == dev->device &&
2862 conf->subvendor == ss_vendor &&
2863 /* Sometimes these are cached values */
2864 (conf->subdevice == ss_device ||
2865 conf->subdevice == 0xffff)) {
2866 struct smsc_ircc_subsystem_configuration
2867 tmpconf;
2868
2869 memcpy(&tmpconf, conf,
2870 sizeof(struct smsc_ircc_subsystem_configuration));
2871
2872 /*
2873 * Override the default values with anything
2874 * passed in as parameter
2875 */
2876 if (ircc_cfg != 0)
2877 tmpconf.cfg_base = ircc_cfg;
2878 if (ircc_fir != 0)
2879 tmpconf.fir_io = ircc_fir;
2880 if (ircc_sir != 0)
2881 tmpconf.sir_io = ircc_sir;
2882 if (ircc_dma != DMA_INVAL)
2883 tmpconf.fir_dma = ircc_dma;
2884 if (ircc_irq != IRQ_INVAL)
2885 tmpconf.fir_irq = ircc_irq;
2886
2887 IRDA_MESSAGE("Detected unconfigured %s SMSC IrDA chip, pre-configuring device.\n", conf->name);
2888 if (conf->preconfigure)
2889 ret = conf->preconfigure(dev, &tmpconf);
2890 else
2891 ret = -ENODEV;
2892 }
2893 }
2894 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2895 }
2896
2897 return ret;
2898 }
2899 #endif // CONFIG_PCI
2900
2901 /************************************************
2902 *
2903 * Transceivers specific functions
2904 *
2905 ************************************************/
2906
2907
2908 /*
2909 * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2910 *
2911 * Program transceiver through smsc-ircc ATC circuitry
2912 *
2913 */
2914
2915 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2916 {
2917 unsigned long jiffies_now, jiffies_timeout;
2918 u8 val;
2919
2920 jiffies_now = jiffies;
2921 jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2922
2923 /* ATC */
2924 register_bank(fir_base, 4);
2925 outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
2926 fir_base + IRCC_ATC);
2927
2928 while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
2929 !time_after(jiffies, jiffies_timeout))
2930 /* empty */;
2931
2932 if (val)
2933 IRDA_WARNING("%s(): ATC: 0x%02x\n", __FUNCTION__,
2934 inb(fir_base + IRCC_ATC));
2935 }
2936
2937 /*
2938 * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2939 *
2940 * Probe transceiver smsc-ircc ATC circuitry
2941 *
2942 */
2943
2944 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2945 {
2946 return 0;
2947 }
2948
2949 /*
2950 * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2951 *
2952 * Set transceiver
2953 *
2954 */
2955
2956 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2957 {
2958 u8 fast_mode;
2959
2960 switch (speed) {
2961 default:
2962 case 576000 :
2963 fast_mode = 0;
2964 break;
2965 case 1152000 :
2966 case 4000000 :
2967 fast_mode = IRCC_LCR_A_FAST;
2968 break;
2969 }
2970 register_bank(fir_base, 0);
2971 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2972 }
2973
2974 /*
2975 * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2976 *
2977 * Probe transceiver
2978 *
2979 */
2980
2981 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2982 {
2983 return 0;
2984 }
2985
2986 /*
2987 * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2988 *
2989 * Set transceiver
2990 *
2991 */
2992
2993 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
2994 {
2995 u8 fast_mode;
2996
2997 switch (speed) {
2998 default:
2999 case 576000 :
3000 fast_mode = 0;
3001 break;
3002 case 1152000 :
3003 case 4000000 :
3004 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
3005 break;
3006
3007 }
3008 /* This causes an interrupt */
3009 register_bank(fir_base, 0);
3010 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
3011 }
3012
3013 /*
3014 * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
3015 *
3016 * Probe transceiver
3017 *
3018 */
3019
3020 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
3021 {
3022 return 0;
3023 }
3024
3025
3026 module_init(smsc_ircc_init);
3027 module_exit(smsc_ircc_cleanup);
cpufreq for S3C2410