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1/*********************************************************************
2 *
3 * Description: Driver for the SMC Infrared Communications Controller
4 * Author: Daniele Peri (peri@csai.unipa.it)
5 * Created at:
6 * Modified at:
7 * Modified by:
8 *
9 * Copyright (c) 2002 Daniele Peri
10 * All Rights Reserved.
11 * Copyright (c) 2002 Jean Tourrilhes
12 * Copyright (c) 2006 Linus Walleij
13 *
14 *
15 * Based on smc-ircc.c:
16 *
17 * Copyright (c) 2001 Stefani Seibold
18 * Copyright (c) 1999-2001 Dag Brattli
19 * Copyright (c) 1998-1999 Thomas Davis,
20 *
21 * and irport.c:
22 *
23 * Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
24 *
25 *
26 * This program is free software; you can redistribute it and/or
27 * modify it under the terms of the GNU General Public License as
28 * published by the Free Software Foundation; either version 2 of
29 * the License, or (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, see <http://www.gnu.org/licenses/>.
38 *
39 ********************************************************************/
40
41#include <linux/module.h>
42#include <linux/kernel.h>
43#include <linux/types.h>
44#include <linux/skbuff.h>
45#include <linux/netdevice.h>
46#include <linux/ioport.h>
47#include <linux/delay.h>
48#include <linux/init.h>
49#include <linux/interrupt.h>
50#include <linux/rtnetlink.h>
51#include <linux/serial_reg.h>
52#include <linux/dma-mapping.h>
53#include <linux/pnp.h>
54#include <linux/platform_device.h>
55#include <linux/gfp.h>
56
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/byteorder.h>
60
61#include <linux/spinlock.h>
62#include <linux/pm.h>
63#ifdef CONFIG_PCI
64#include <linux/pci.h>
65#endif
66
67#include <net/irda/wrapper.h>
68#include <net/irda/irda.h>
69#include <net/irda/irda_device.h>
70
71#include "smsc-ircc2.h"
72#include "smsc-sio.h"
73
74
75MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
76MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
77MODULE_LICENSE("GPL");
78
79static bool smsc_nopnp = true;
80module_param_named(nopnp, smsc_nopnp, bool, 0);
81MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings, defaults to true");
82
83#define DMA_INVAL 255
84static int ircc_dma = DMA_INVAL;
85module_param(ircc_dma, int, 0);
86MODULE_PARM_DESC(ircc_dma, "DMA channel");
87
88#define IRQ_INVAL 255
89static int ircc_irq = IRQ_INVAL;
90module_param(ircc_irq, int, 0);
91MODULE_PARM_DESC(ircc_irq, "IRQ line");
92
93static int ircc_fir;
94module_param(ircc_fir, int, 0);
95MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
96
97static int ircc_sir;
98module_param(ircc_sir, int, 0);
99MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
100
101static int ircc_cfg;
102module_param(ircc_cfg, int, 0);
103MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
104
105static int ircc_transceiver;
106module_param(ircc_transceiver, int, 0);
107MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
108
109/* Types */
110
111#ifdef CONFIG_PCI
112struct smsc_ircc_subsystem_configuration {
113 unsigned short vendor; /* PCI vendor ID */
114 unsigned short device; /* PCI vendor ID */
115 unsigned short subvendor; /* PCI subsystem vendor ID */
116 unsigned short subdevice; /* PCI subsystem device ID */
117 unsigned short sir_io; /* I/O port for SIR */
118 unsigned short fir_io; /* I/O port for FIR */
119 unsigned char fir_irq; /* FIR IRQ */
120 unsigned char fir_dma; /* FIR DMA */
121 unsigned short cfg_base; /* I/O port for chip configuration */
122 int (*preconfigure)(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf); /* Preconfig function */
123 const char *name; /* name shown as info */
124};
125#endif
126
127struct smsc_transceiver {
128 char *name;
129 void (*set_for_speed)(int fir_base, u32 speed);
130 int (*probe)(int fir_base);
131};
132
133struct smsc_chip {
134 char *name;
135 #if 0
136 u8 type;
137 #endif
138 u16 flags;
139 u8 devid;
140 u8 rev;
141};
142
143struct smsc_chip_address {
144 unsigned int cfg_base;
145 unsigned int type;
146};
147
148/* Private data for each instance */
149struct smsc_ircc_cb {
150 struct net_device *netdev; /* Yes! we are some kind of netdevice */
151 struct irlap_cb *irlap; /* The link layer we are binded to */
152
153 chipio_t io; /* IrDA controller information */
154 iobuff_t tx_buff; /* Transmit buffer */
155 iobuff_t rx_buff; /* Receive buffer */
156 dma_addr_t tx_buff_dma;
157 dma_addr_t rx_buff_dma;
158
159 struct qos_info qos; /* QoS capabilities for this device */
160
161 spinlock_t lock; /* For serializing operations */
162
163 __u32 new_speed;
164 __u32 flags; /* Interface flags */
165
166 int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
167 int tx_len; /* Number of frames in tx_buff */
168
169 int transceiver;
170 struct platform_device *pldev;
171};
172
173/* Constants */
174
175#define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
176
177#define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
178#define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
179#define SMSC_IRCC2_C_NET_TIMEOUT 0
180#define SMSC_IRCC2_C_SIR_STOP 0
181
182static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
183
184/* Prototypes */
185
186static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
187static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
188static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
189static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
190static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
191static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
192static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
193static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
194static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
195static netdev_tx_t smsc_ircc_hard_xmit_sir(struct sk_buff *skb,
196 struct net_device *dev);
197static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
198 struct net_device *dev);
199static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs);
200static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self);
201static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed);
202static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, u32 speed);
203static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id);
204static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
205static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
206#if SMSC_IRCC2_C_SIR_STOP
207static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
208#endif
209static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
210static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
211static int smsc_ircc_net_open(struct net_device *dev);
212static int smsc_ircc_net_close(struct net_device *dev);
213static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
214#if SMSC_IRCC2_C_NET_TIMEOUT
215static void smsc_ircc_timeout(struct net_device *dev);
216#endif
217static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
218static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
219static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
220static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
221
222/* Probing */
223static int __init smsc_ircc_look_for_chips(void);
224static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
225static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
226static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
227static int __init smsc_superio_fdc(unsigned short cfg_base);
228static int __init smsc_superio_lpc(unsigned short cfg_base);
229#ifdef CONFIG_PCI
230static int __init preconfigure_smsc_chip(struct smsc_ircc_subsystem_configuration *conf);
231static int __init preconfigure_through_82801(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
232static void __init preconfigure_ali_port(struct pci_dev *dev,
233 unsigned short port);
234static int __init preconfigure_through_ali(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
235static 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
244static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
245static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
246static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
247static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
248static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
249static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
250
251/* Power Management */
252
253static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
254static int smsc_ircc_resume(struct platform_device *dev);
255
256static 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
266static 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
284static 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
298static 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
317static 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
326static 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
345static 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
357static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
358static unsigned short dev_count;
359
360static 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 */
367static const struct pnp_device_id smsc_ircc_pnp_table[] = {
368 { .id = "SMCf010", .driver_data = 0 },
369 /* and presumably others */
370 { }
371};
372MODULE_DEVICE_TABLE(pnp, smsc_ircc_pnp_table);
373
374static int pnp_driver_registered;
375
376#ifdef CONFIG_PNP
377static int 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
398static 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 */
404static struct pnp_driver smsc_ircc_pnp_driver;
405#endif
406
407/*******************************************************************************
408 *
409 *
410 * SMSC-ircc stuff
411 *
412 *
413 *******************************************************************************/
414
415static 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 */
457static 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
489static netdev_tx_t smsc_ircc_net_xmit(struct sk_buff *skb,
490 struct net_device *dev)
491{
492 struct smsc_ircc_cb *self = netdev_priv(dev);
493
494 if (self->io.speed > 115200)
495 return smsc_ircc_hard_xmit_fir(skb, dev);
496 else
497 return smsc_ircc_hard_xmit_sir(skb, dev);
498}
499
500static const struct net_device_ops smsc_ircc_netdev_ops = {
501 .ndo_open = smsc_ircc_net_open,
502 .ndo_stop = smsc_ircc_net_close,
503 .ndo_do_ioctl = smsc_ircc_net_ioctl,
504 .ndo_start_xmit = smsc_ircc_net_xmit,
505#if SMSC_IRCC2_C_NET_TIMEOUT
506 .ndo_tx_timeout = smsc_ircc_timeout,
507#endif
508};
509
510/*
511 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
512 *
513 * Try to open driver instance
514 *
515 */
516static int smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
517{
518 struct smsc_ircc_cb *self;
519 struct net_device *dev;
520 int err;
521
522 IRDA_DEBUG(1, "%s\n", __func__);
523
524 err = smsc_ircc_present(fir_base, sir_base);
525 if (err)
526 goto err_out;
527
528 err = -ENOMEM;
529 if (dev_count >= ARRAY_SIZE(dev_self)) {
530 IRDA_WARNING("%s(), too many devices!\n", __func__);
531 goto err_out1;
532 }
533
534 /*
535 * Allocate new instance of the driver
536 */
537 dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
538 if (!dev) {
539 IRDA_WARNING("%s() can't allocate net device\n", __func__);
540 goto err_out1;
541 }
542
543#if SMSC_IRCC2_C_NET_TIMEOUT
544 dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
545#endif
546 dev->netdev_ops = &smsc_ircc_netdev_ops;
547
548 self = netdev_priv(dev);
549 self->netdev = dev;
550
551 /* Make ifconfig display some details */
552 dev->base_addr = self->io.fir_base = fir_base;
553 dev->irq = self->io.irq = irq;
554
555 /* Need to store self somewhere */
556 dev_self[dev_count] = self;
557 spin_lock_init(&self->lock);
558
559 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
560 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
561
562 self->rx_buff.head =
563 dma_zalloc_coherent(NULL, self->rx_buff.truesize,
564 &self->rx_buff_dma, GFP_KERNEL);
565 if (self->rx_buff.head == NULL)
566 goto err_out2;
567
568 self->tx_buff.head =
569 dma_zalloc_coherent(NULL, self->tx_buff.truesize,
570 &self->tx_buff_dma, GFP_KERNEL);
571 if (self->tx_buff.head == NULL)
572 goto err_out3;
573
574 self->rx_buff.in_frame = FALSE;
575 self->rx_buff.state = OUTSIDE_FRAME;
576 self->tx_buff.data = self->tx_buff.head;
577 self->rx_buff.data = self->rx_buff.head;
578
579 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
580 smsc_ircc_setup_qos(self);
581 smsc_ircc_init_chip(self);
582
583 if (ircc_transceiver > 0 &&
584 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
585 self->transceiver = ircc_transceiver;
586 else
587 smsc_ircc_probe_transceiver(self);
588
589 err = register_netdev(self->netdev);
590 if (err) {
591 IRDA_ERROR("%s, Network device registration failed!\n",
592 driver_name);
593 goto err_out4;
594 }
595
596 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
597 dev_count, NULL, 0);
598 if (IS_ERR(self->pldev)) {
599 err = PTR_ERR(self->pldev);
600 goto err_out5;
601 }
602 platform_set_drvdata(self->pldev, self);
603
604 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
605 dev_count++;
606
607 return 0;
608
609 err_out5:
610 unregister_netdev(self->netdev);
611
612 err_out4:
613 dma_free_coherent(NULL, self->tx_buff.truesize,
614 self->tx_buff.head, self->tx_buff_dma);
615 err_out3:
616 dma_free_coherent(NULL, self->rx_buff.truesize,
617 self->rx_buff.head, self->rx_buff_dma);
618 err_out2:
619 free_netdev(self->netdev);
620 dev_self[dev_count] = NULL;
621 err_out1:
622 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
623 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
624 err_out:
625 return err;
626}
627
628/*
629 * Function smsc_ircc_present(fir_base, sir_base)
630 *
631 * Check the smsc-ircc chip presence
632 *
633 */
634static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
635{
636 unsigned char low, high, chip, config, dma, irq, version;
637
638 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
639 driver_name)) {
640 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
641 __func__, fir_base);
642 goto out1;
643 }
644
645 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
646 driver_name)) {
647 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
648 __func__, sir_base);
649 goto out2;
650 }
651
652 register_bank(fir_base, 3);
653
654 high = inb(fir_base + IRCC_ID_HIGH);
655 low = inb(fir_base + IRCC_ID_LOW);
656 chip = inb(fir_base + IRCC_CHIP_ID);
657 version = inb(fir_base + IRCC_VERSION);
658 config = inb(fir_base + IRCC_INTERFACE);
659 dma = config & IRCC_INTERFACE_DMA_MASK;
660 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
661
662 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
663 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
664 __func__, fir_base);
665 goto out3;
666 }
667 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
668 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
669 chip & 0x0f, version, fir_base, sir_base, dma, irq);
670
671 return 0;
672
673 out3:
674 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
675 out2:
676 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
677 out1:
678 return -ENODEV;
679}
680
681/*
682 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
683 *
684 * Setup I/O
685 *
686 */
687static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
688 unsigned int fir_base, unsigned int sir_base,
689 u8 dma, u8 irq)
690{
691 unsigned char config, chip_dma, chip_irq;
692
693 register_bank(fir_base, 3);
694 config = inb(fir_base + IRCC_INTERFACE);
695 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
696 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
697
698 self->io.fir_base = fir_base;
699 self->io.sir_base = sir_base;
700 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
701 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
702 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
703 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
704
705 if (irq != IRQ_INVAL) {
706 if (irq != chip_irq)
707 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
708 driver_name, chip_irq, irq);
709 self->io.irq = irq;
710 } else
711 self->io.irq = chip_irq;
712
713 if (dma != DMA_INVAL) {
714 if (dma != chip_dma)
715 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
716 driver_name, chip_dma, dma);
717 self->io.dma = dma;
718 } else
719 self->io.dma = chip_dma;
720
721}
722
723/*
724 * Function smsc_ircc_setup_qos(self)
725 *
726 * Setup qos
727 *
728 */
729static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
730{
731 /* Initialize QoS for this device */
732 irda_init_max_qos_capabilies(&self->qos);
733
734 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
735 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
736
737 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
738 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
739 irda_qos_bits_to_value(&self->qos);
740}
741
742/*
743 * Function smsc_ircc_init_chip(self)
744 *
745 * Init chip
746 *
747 */
748static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
749{
750 int iobase = self->io.fir_base;
751
752 register_bank(iobase, 0);
753 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
754 outb(0x00, iobase + IRCC_MASTER);
755
756 register_bank(iobase, 1);
757 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
758 iobase + IRCC_SCE_CFGA);
759
760#ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
761 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
762 iobase + IRCC_SCE_CFGB);
763#else
764 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
765 iobase + IRCC_SCE_CFGB);
766#endif
767 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
768 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
769
770 register_bank(iobase, 4);
771 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
772
773 register_bank(iobase, 0);
774 outb(0, iobase + IRCC_LCR_A);
775
776 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
777
778 /* Power on device */
779 outb(0x00, iobase + IRCC_MASTER);
780}
781
782/*
783 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
784 *
785 * Process IOCTL commands for this device
786 *
787 */
788static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
789{
790 struct if_irda_req *irq = (struct if_irda_req *) rq;
791 struct smsc_ircc_cb *self;
792 unsigned long flags;
793 int ret = 0;
794
795 IRDA_ASSERT(dev != NULL, return -1;);
796
797 self = netdev_priv(dev);
798
799 IRDA_ASSERT(self != NULL, return -1;);
800
801 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
802
803 switch (cmd) {
804 case SIOCSBANDWIDTH: /* Set bandwidth */
805 if (!capable(CAP_NET_ADMIN))
806 ret = -EPERM;
807 else {
808 /* Make sure we are the only one touching
809 * self->io.speed and the hardware - Jean II */
810 spin_lock_irqsave(&self->lock, flags);
811 smsc_ircc_change_speed(self, irq->ifr_baudrate);
812 spin_unlock_irqrestore(&self->lock, flags);
813 }
814 break;
815 case SIOCSMEDIABUSY: /* Set media busy */
816 if (!capable(CAP_NET_ADMIN)) {
817 ret = -EPERM;
818 break;
819 }
820
821 irda_device_set_media_busy(self->netdev, TRUE);
822 break;
823 case SIOCGRECEIVING: /* Check if we are receiving right now */
824 irq->ifr_receiving = smsc_ircc_is_receiving(self);
825 break;
826 #if 0
827 case SIOCSDTRRTS:
828 if (!capable(CAP_NET_ADMIN)) {
829 ret = -EPERM;
830 break;
831 }
832 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
833 break;
834 #endif
835 default:
836 ret = -EOPNOTSUPP;
837 }
838
839 return ret;
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
850static 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; /* prevent tx timeout */
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 */
873static netdev_tx_t smsc_ircc_hard_xmit_sir(struct sk_buff *skb,
874 struct net_device *dev)
875{
876 struct smsc_ircc_cb *self;
877 unsigned long flags;
878 s32 speed;
879
880 IRDA_DEBUG(1, "%s\n", __func__);
881
882 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
883
884 self = netdev_priv(dev);
885 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
886
887 netif_stop_queue(dev);
888
889 /* Make sure test of self->io.speed & speed change are atomic */
890 spin_lock_irqsave(&self->lock, flags);
891
892 /* Check if we need to change the speed */
893 speed = irda_get_next_speed(skb);
894 if (speed != self->io.speed && speed != -1) {
895 /* Check for empty frame */
896 if (!skb->len) {
897 /*
898 * We send frames one by one in SIR mode (no
899 * pipelining), so at this point, if we were sending
900 * a previous frame, we just received the interrupt
901 * telling us it is finished (UART_IIR_THRI).
902 * Therefore, waiting for the transmitter to really
903 * finish draining the fifo won't take too long.
904 * And the interrupt handler is not expected to run.
905 * - Jean II */
906 smsc_ircc_sir_wait_hw_transmitter_finish(self);
907 smsc_ircc_change_speed(self, speed);
908 spin_unlock_irqrestore(&self->lock, flags);
909 dev_kfree_skb(skb);
910 return NETDEV_TX_OK;
911 }
912 self->new_speed = speed;
913 }
914
915 /* Init tx buffer */
916 self->tx_buff.data = self->tx_buff.head;
917
918 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
919 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
920 self->tx_buff.truesize);
921
922 dev->stats.tx_bytes += self->tx_buff.len;
923
924 /* Turn on transmit finished interrupt. Will fire immediately! */
925 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
926
927 spin_unlock_irqrestore(&self->lock, flags);
928
929 dev_kfree_skb(skb);
930
931 return NETDEV_TX_OK;
932}
933
934/*
935 * Function smsc_ircc_set_fir_speed (self, baud)
936 *
937 * Change the speed of the device
938 *
939 */
940static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
941{
942 int fir_base, ir_mode, ctrl, fast;
943
944 IRDA_ASSERT(self != NULL, return;);
945 fir_base = self->io.fir_base;
946
947 self->io.speed = speed;
948
949 switch (speed) {
950 default:
951 case 576000:
952 ir_mode = IRCC_CFGA_IRDA_HDLC;
953 ctrl = IRCC_CRC;
954 fast = 0;
955 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
956 break;
957 case 1152000:
958 ir_mode = IRCC_CFGA_IRDA_HDLC;
959 ctrl = IRCC_1152 | IRCC_CRC;
960 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
961 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
962 __func__);
963 break;
964 case 4000000:
965 ir_mode = IRCC_CFGA_IRDA_4PPM;
966 ctrl = IRCC_CRC;
967 fast = IRCC_LCR_A_FAST;
968 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
969 __func__);
970 break;
971 }
972 #if 0
973 Now in tranceiver!
974 /* This causes an interrupt */
975 register_bank(fir_base, 0);
976 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
977 #endif
978
979 register_bank(fir_base, 1);
980 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
981
982 register_bank(fir_base, 4);
983 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
984}
985
986/*
987 * Function smsc_ircc_fir_start(self)
988 *
989 * Change the speed of the device
990 *
991 */
992static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
993{
994 struct net_device *dev;
995 int fir_base;
996
997 IRDA_DEBUG(1, "%s\n", __func__);
998
999 IRDA_ASSERT(self != NULL, return;);
1000 dev = self->netdev;
1001 IRDA_ASSERT(dev != NULL, return;);
1002
1003 fir_base = self->io.fir_base;
1004
1005 /* Reset everything */
1006
1007 /* Clear FIFO */
1008 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
1009
1010 /* Enable interrupt */
1011 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
1012
1013 register_bank(fir_base, 1);
1014
1015 /* Select the TX/RX interface */
1016#ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
1017 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
1018 fir_base + IRCC_SCE_CFGB);
1019#else
1020 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
1021 fir_base + IRCC_SCE_CFGB);
1022#endif
1023 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
1024
1025 /* Enable SCE interrupts */
1026 outb(0, fir_base + IRCC_MASTER);
1027 register_bank(fir_base, 0);
1028 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
1029 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
1030}
1031
1032/*
1033 * Function smsc_ircc_fir_stop(self, baud)
1034 *
1035 * Change the speed of the device
1036 *
1037 */
1038static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
1039{
1040 int fir_base;
1041
1042 IRDA_DEBUG(1, "%s\n", __func__);
1043
1044 IRDA_ASSERT(self != NULL, return;);
1045
1046 fir_base = self->io.fir_base;
1047 register_bank(fir_base, 0);
1048 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
1049 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
1050}
1051
1052
1053/*
1054 * Function smsc_ircc_change_speed(self, baud)
1055 *
1056 * Change the speed of the device
1057 *
1058 * This function *must* be called with spinlock held, because it may
1059 * be called from the irq handler. - Jean II
1060 */
1061static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
1062{
1063 struct net_device *dev;
1064 int last_speed_was_sir;
1065
1066 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __func__, speed);
1067
1068 IRDA_ASSERT(self != NULL, return;);
1069 dev = self->netdev;
1070
1071 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
1072
1073 #if 0
1074 /* Temp Hack */
1075 speed= 1152000;
1076 self->io.speed = speed;
1077 last_speed_was_sir = 0;
1078 smsc_ircc_fir_start(self);
1079 #endif
1080
1081 if (self->io.speed == 0)
1082 smsc_ircc_sir_start(self);
1083
1084 #if 0
1085 if (!last_speed_was_sir) speed = self->io.speed;
1086 #endif
1087
1088 if (self->io.speed != speed)
1089 smsc_ircc_set_transceiver_for_speed(self, speed);
1090
1091 self->io.speed = speed;
1092
1093 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1094 if (!last_speed_was_sir) {
1095 smsc_ircc_fir_stop(self);
1096 smsc_ircc_sir_start(self);
1097 }
1098 smsc_ircc_set_sir_speed(self, speed);
1099 } else {
1100 if (last_speed_was_sir) {
1101 #if SMSC_IRCC2_C_SIR_STOP
1102 smsc_ircc_sir_stop(self);
1103 #endif
1104 smsc_ircc_fir_start(self);
1105 }
1106 smsc_ircc_set_fir_speed(self, speed);
1107
1108 #if 0
1109 self->tx_buff.len = 10;
1110 self->tx_buff.data = self->tx_buff.head;
1111
1112 smsc_ircc_dma_xmit(self, 4000);
1113 #endif
1114 /* Be ready for incoming frames */
1115 smsc_ircc_dma_receive(self);
1116 }
1117
1118 netif_wake_queue(dev);
1119}
1120
1121/*
1122 * Function smsc_ircc_set_sir_speed (self, speed)
1123 *
1124 * Set speed of IrDA port to specified baudrate
1125 *
1126 */
1127static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1128{
1129 int iobase;
1130 int fcr; /* FIFO control reg */
1131 int lcr; /* Line control reg */
1132 int divisor;
1133
1134 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __func__, speed);
1135
1136 IRDA_ASSERT(self != NULL, return;);
1137 iobase = self->io.sir_base;
1138
1139 /* Update accounting for new speed */
1140 self->io.speed = speed;
1141
1142 /* Turn off interrupts */
1143 outb(0, iobase + UART_IER);
1144
1145 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1146
1147 fcr = UART_FCR_ENABLE_FIFO;
1148
1149 /*
1150 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1151 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1152 * about this timeout since it will always be fast enough.
1153 */
1154 fcr |= self->io.speed < 38400 ?
1155 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1156
1157 /* IrDA ports use 8N1 */
1158 lcr = UART_LCR_WLEN8;
1159
1160 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1161 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1162 outb(divisor >> 8, iobase + UART_DLM);
1163 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1164 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1165
1166 /* Turn on interrups */
1167 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1168
1169 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __func__, speed);
1170}
1171
1172
1173/*
1174 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1175 *
1176 * Transmit the frame!
1177 *
1178 */
1179static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
1180 struct net_device *dev)
1181{
1182 struct smsc_ircc_cb *self;
1183 unsigned long flags;
1184 s32 speed;
1185 int mtt;
1186
1187 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1188 self = netdev_priv(dev);
1189 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1190
1191 netif_stop_queue(dev);
1192
1193 /* Make sure test of self->io.speed & speed change are atomic */
1194 spin_lock_irqsave(&self->lock, flags);
1195
1196 /* Check if we need to change the speed after this frame */
1197 speed = irda_get_next_speed(skb);
1198 if (speed != self->io.speed && speed != -1) {
1199 /* Check for empty frame */
1200 if (!skb->len) {
1201 /* Note : you should make sure that speed changes
1202 * are not going to corrupt any outgoing frame.
1203 * Look at nsc-ircc for the gory details - Jean II */
1204 smsc_ircc_change_speed(self, speed);
1205 spin_unlock_irqrestore(&self->lock, flags);
1206 dev_kfree_skb(skb);
1207 return NETDEV_TX_OK;
1208 }
1209
1210 self->new_speed = speed;
1211 }
1212
1213 skb_copy_from_linear_data(skb, self->tx_buff.head, skb->len);
1214
1215 self->tx_buff.len = skb->len;
1216 self->tx_buff.data = self->tx_buff.head;
1217
1218 mtt = irda_get_mtt(skb);
1219 if (mtt) {
1220 int bofs;
1221
1222 /*
1223 * Compute how many BOFs (STA or PA's) we need to waste the
1224 * min turn time given the speed of the link.
1225 */
1226 bofs = mtt * (self->io.speed / 1000) / 8000;
1227 if (bofs > 4095)
1228 bofs = 4095;
1229
1230 smsc_ircc_dma_xmit(self, bofs);
1231 } else {
1232 /* Transmit frame */
1233 smsc_ircc_dma_xmit(self, 0);
1234 }
1235
1236 spin_unlock_irqrestore(&self->lock, flags);
1237 dev_kfree_skb(skb);
1238
1239 return NETDEV_TX_OK;
1240}
1241
1242/*
1243 * Function smsc_ircc_dma_xmit (self, bofs)
1244 *
1245 * Transmit data using DMA
1246 *
1247 */
1248static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1249{
1250 int iobase = self->io.fir_base;
1251 u8 ctrl;
1252
1253 IRDA_DEBUG(3, "%s\n", __func__);
1254#if 1
1255 /* Disable Rx */
1256 register_bank(iobase, 0);
1257 outb(0x00, iobase + IRCC_LCR_B);
1258#endif
1259 register_bank(iobase, 1);
1260 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1261 iobase + IRCC_SCE_CFGB);
1262
1263 self->io.direction = IO_XMIT;
1264
1265 /* Set BOF additional count for generating the min turn time */
1266 register_bank(iobase, 4);
1267 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1268 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1269 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1270
1271 /* Set max Tx frame size */
1272 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1273 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1274
1275 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1276
1277 /* Enable burst mode chip Tx DMA */
1278 register_bank(iobase, 1);
1279 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1280 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1281
1282 /* Setup DMA controller (must be done after enabling chip DMA) */
1283 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1284 DMA_TX_MODE);
1285
1286 /* Enable interrupt */
1287
1288 register_bank(iobase, 0);
1289 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1290 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1291
1292 /* Enable transmit */
1293 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1294}
1295
1296/*
1297 * Function smsc_ircc_dma_xmit_complete (self)
1298 *
1299 * The transfer of a frame in finished. This function will only be called
1300 * by the interrupt handler
1301 *
1302 */
1303static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1304{
1305 int iobase = self->io.fir_base;
1306
1307 IRDA_DEBUG(3, "%s\n", __func__);
1308#if 0
1309 /* Disable Tx */
1310 register_bank(iobase, 0);
1311 outb(0x00, iobase + IRCC_LCR_B);
1312#endif
1313 register_bank(iobase, 1);
1314 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1315 iobase + IRCC_SCE_CFGB);
1316
1317 /* Check for underrun! */
1318 register_bank(iobase, 0);
1319 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1320 self->netdev->stats.tx_errors++;
1321 self->netdev->stats.tx_fifo_errors++;
1322
1323 /* Reset error condition */
1324 register_bank(iobase, 0);
1325 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1326 outb(0x00, iobase + IRCC_MASTER);
1327 } else {
1328 self->netdev->stats.tx_packets++;
1329 self->netdev->stats.tx_bytes += self->tx_buff.len;
1330 }
1331
1332 /* Check if it's time to change the speed */
1333 if (self->new_speed) {
1334 smsc_ircc_change_speed(self, self->new_speed);
1335 self->new_speed = 0;
1336 }
1337
1338 netif_wake_queue(self->netdev);
1339}
1340
1341/*
1342 * Function smsc_ircc_dma_receive(self)
1343 *
1344 * Get ready for receiving a frame. The device will initiate a DMA
1345 * if it starts to receive a frame.
1346 *
1347 */
1348static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1349{
1350 int iobase = self->io.fir_base;
1351#if 0
1352 /* Turn off chip DMA */
1353 register_bank(iobase, 1);
1354 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1355 iobase + IRCC_SCE_CFGB);
1356#endif
1357
1358 /* Disable Tx */
1359 register_bank(iobase, 0);
1360 outb(0x00, iobase + IRCC_LCR_B);
1361
1362 /* Turn off chip DMA */
1363 register_bank(iobase, 1);
1364 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1365 iobase + IRCC_SCE_CFGB);
1366
1367 self->io.direction = IO_RECV;
1368 self->rx_buff.data = self->rx_buff.head;
1369
1370 /* Set max Rx frame size */
1371 register_bank(iobase, 4);
1372 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1373 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1374
1375 /* Setup DMA controller */
1376 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1377 DMA_RX_MODE);
1378
1379 /* Enable burst mode chip Rx DMA */
1380 register_bank(iobase, 1);
1381 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1382 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1383
1384 /* Enable interrupt */
1385 register_bank(iobase, 0);
1386 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1387 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1388
1389 /* Enable receiver */
1390 register_bank(iobase, 0);
1391 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1392 iobase + IRCC_LCR_B);
1393
1394 return 0;
1395}
1396
1397/*
1398 * Function smsc_ircc_dma_receive_complete(self)
1399 *
1400 * Finished with receiving frames
1401 *
1402 */
1403static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1404{
1405 struct sk_buff *skb;
1406 int len, msgcnt, lsr;
1407 int iobase = self->io.fir_base;
1408
1409 register_bank(iobase, 0);
1410
1411 IRDA_DEBUG(3, "%s\n", __func__);
1412#if 0
1413 /* Disable Rx */
1414 register_bank(iobase, 0);
1415 outb(0x00, iobase + IRCC_LCR_B);
1416#endif
1417 register_bank(iobase, 0);
1418 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1419 lsr= inb(iobase + IRCC_LSR);
1420 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1421
1422 IRDA_DEBUG(2, "%s: dma count = %d\n", __func__,
1423 get_dma_residue(self->io.dma));
1424
1425 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1426
1427 /* Look for errors */
1428 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1429 self->netdev->stats.rx_errors++;
1430 if (lsr & IRCC_LSR_FRAME_ERROR)
1431 self->netdev->stats.rx_frame_errors++;
1432 if (lsr & IRCC_LSR_CRC_ERROR)
1433 self->netdev->stats.rx_crc_errors++;
1434 if (lsr & IRCC_LSR_SIZE_ERROR)
1435 self->netdev->stats.rx_length_errors++;
1436 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1437 self->netdev->stats.rx_length_errors++;
1438 return;
1439 }
1440
1441 /* Remove CRC */
1442 len -= self->io.speed < 4000000 ? 2 : 4;
1443
1444 if (len < 2 || len > 2050) {
1445 IRDA_WARNING("%s(), bogus len=%d\n", __func__, len);
1446 return;
1447 }
1448 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __func__, msgcnt, len);
1449
1450 skb = dev_alloc_skb(len + 1);
1451 if (!skb) {
1452 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1453 __func__);
1454 return;
1455 }
1456 /* Make sure IP header gets aligned */
1457 skb_reserve(skb, 1);
1458
1459 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1460 self->netdev->stats.rx_packets++;
1461 self->netdev->stats.rx_bytes += len;
1462
1463 skb->dev = self->netdev;
1464 skb_reset_mac_header(skb);
1465 skb->protocol = htons(ETH_P_IRDA);
1466 netif_rx(skb);
1467}
1468
1469/*
1470 * Function smsc_ircc_sir_receive (self)
1471 *
1472 * Receive one frame from the infrared port
1473 *
1474 */
1475static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1476{
1477 int boguscount = 0;
1478 int iobase;
1479
1480 IRDA_ASSERT(self != NULL, return;);
1481
1482 iobase = self->io.sir_base;
1483
1484 /*
1485 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1486 * async_unwrap_char will deliver all found frames
1487 */
1488 do {
1489 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
1490 inb(iobase + UART_RX));
1491
1492 /* Make sure we don't stay here to long */
1493 if (boguscount++ > 32) {
1494 IRDA_DEBUG(2, "%s(), breaking!\n", __func__);
1495 break;
1496 }
1497 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1498}
1499
1500
1501/*
1502 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1503 *
1504 * An interrupt from the chip has arrived. Time to do some work
1505 *
1506 */
1507static irqreturn_t smsc_ircc_interrupt(int dummy, void *dev_id)
1508{
1509 struct net_device *dev = dev_id;
1510 struct smsc_ircc_cb *self = netdev_priv(dev);
1511 int iobase, iir, lcra, lsr;
1512 irqreturn_t ret = IRQ_NONE;
1513
1514 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1515 spin_lock(&self->lock);
1516
1517 /* Check if we should use the SIR interrupt handler */
1518 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1519 ret = smsc_ircc_interrupt_sir(dev);
1520 goto irq_ret_unlock;
1521 }
1522
1523 iobase = self->io.fir_base;
1524
1525 register_bank(iobase, 0);
1526 iir = inb(iobase + IRCC_IIR);
1527 if (iir == 0)
1528 goto irq_ret_unlock;
1529 ret = IRQ_HANDLED;
1530
1531 /* Disable interrupts */
1532 outb(0, iobase + IRCC_IER);
1533 lcra = inb(iobase + IRCC_LCR_A);
1534 lsr = inb(iobase + IRCC_LSR);
1535
1536 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __func__, iir);
1537
1538 if (iir & IRCC_IIR_EOM) {
1539 if (self->io.direction == IO_RECV)
1540 smsc_ircc_dma_receive_complete(self);
1541 else
1542 smsc_ircc_dma_xmit_complete(self);
1543
1544 smsc_ircc_dma_receive(self);
1545 }
1546
1547 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1548 /*printk(KERN_WARNING "%s(): Active Frame\n", __func__);*/
1549 }
1550
1551 /* Enable interrupts again */
1552
1553 register_bank(iobase, 0);
1554 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1555
1556 irq_ret_unlock:
1557 spin_unlock(&self->lock);
1558
1559 return ret;
1560}
1561
1562/*
1563 * Function irport_interrupt_sir (irq, dev_id)
1564 *
1565 * Interrupt handler for SIR modes
1566 */
1567static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1568{
1569 struct smsc_ircc_cb *self = netdev_priv(dev);
1570 int boguscount = 0;
1571 int iobase;
1572 int iir, lsr;
1573
1574 /* Already locked coming here in smsc_ircc_interrupt() */
1575 /*spin_lock(&self->lock);*/
1576
1577 iobase = self->io.sir_base;
1578
1579 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1580 if (iir == 0)
1581 return IRQ_NONE;
1582 while (iir) {
1583 /* Clear interrupt */
1584 lsr = inb(iobase + UART_LSR);
1585
1586 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1587 __func__, iir, lsr, iobase);
1588
1589 switch (iir) {
1590 case UART_IIR_RLSI:
1591 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
1592 break;
1593 case UART_IIR_RDI:
1594 /* Receive interrupt */
1595 smsc_ircc_sir_receive(self);
1596 break;
1597 case UART_IIR_THRI:
1598 if (lsr & UART_LSR_THRE)
1599 /* Transmitter ready for data */
1600 smsc_ircc_sir_write_wakeup(self);
1601 break;
1602 default:
1603 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1604 __func__, iir);
1605 break;
1606 }
1607
1608 /* Make sure we don't stay here to long */
1609 if (boguscount++ > 100)
1610 break;
1611
1612 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1613 }
1614 /*spin_unlock(&self->lock);*/
1615 return IRQ_HANDLED;
1616}
1617
1618
1619#if 0 /* unused */
1620/*
1621 * Function ircc_is_receiving (self)
1622 *
1623 * Return TRUE is we are currently receiving a frame
1624 *
1625 */
1626static int ircc_is_receiving(struct smsc_ircc_cb *self)
1627{
1628 int status = FALSE;
1629 /* int iobase; */
1630
1631 IRDA_DEBUG(1, "%s\n", __func__);
1632
1633 IRDA_ASSERT(self != NULL, return FALSE;);
1634
1635 IRDA_DEBUG(0, "%s: dma count = %d\n", __func__,
1636 get_dma_residue(self->io.dma));
1637
1638 status = (self->rx_buff.state != OUTSIDE_FRAME);
1639
1640 return status;
1641}
1642#endif /* unused */
1643
1644static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1645{
1646 int error;
1647
1648 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1649 self->netdev->name, self->netdev);
1650 if (error)
1651 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1652 __func__, self->io.irq, error);
1653
1654 return error;
1655}
1656
1657static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1658{
1659 unsigned long flags;
1660
1661 spin_lock_irqsave(&self->lock, flags);
1662
1663 self->io.speed = 0;
1664 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1665
1666 spin_unlock_irqrestore(&self->lock, flags);
1667}
1668
1669static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1670{
1671 int iobase = self->io.fir_base;
1672 unsigned long flags;
1673
1674 spin_lock_irqsave(&self->lock, flags);
1675
1676 register_bank(iobase, 0);
1677 outb(0, iobase + IRCC_IER);
1678 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1679 outb(0x00, iobase + IRCC_MASTER);
1680
1681 spin_unlock_irqrestore(&self->lock, flags);
1682}
1683
1684
1685/*
1686 * Function smsc_ircc_net_open (dev)
1687 *
1688 * Start the device
1689 *
1690 */
1691static int smsc_ircc_net_open(struct net_device *dev)
1692{
1693 struct smsc_ircc_cb *self;
1694 char hwname[16];
1695
1696 IRDA_DEBUG(1, "%s\n", __func__);
1697
1698 IRDA_ASSERT(dev != NULL, return -1;);
1699 self = netdev_priv(dev);
1700 IRDA_ASSERT(self != NULL, return 0;);
1701
1702 if (self->io.suspended) {
1703 IRDA_DEBUG(0, "%s(), device is suspended\n", __func__);
1704 return -EAGAIN;
1705 }
1706
1707 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1708 (void *) dev)) {
1709 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1710 __func__, self->io.irq);
1711 return -EAGAIN;
1712 }
1713
1714 smsc_ircc_start_interrupts(self);
1715
1716 /* Give self a hardware name */
1717 /* It would be cool to offer the chip revision here - Jean II */
1718 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1719
1720 /*
1721 * Open new IrLAP layer instance, now that everything should be
1722 * initialized properly
1723 */
1724 self->irlap = irlap_open(dev, &self->qos, hwname);
1725
1726 /*
1727 * Always allocate the DMA channel after the IRQ,
1728 * and clean up on failure.
1729 */
1730 if (request_dma(self->io.dma, dev->name)) {
1731 smsc_ircc_net_close(dev);
1732
1733 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1734 __func__, self->io.dma);
1735 return -EAGAIN;
1736 }
1737
1738 netif_start_queue(dev);
1739
1740 return 0;
1741}
1742
1743/*
1744 * Function smsc_ircc_net_close (dev)
1745 *
1746 * Stop the device
1747 *
1748 */
1749static int smsc_ircc_net_close(struct net_device *dev)
1750{
1751 struct smsc_ircc_cb *self;
1752
1753 IRDA_DEBUG(1, "%s\n", __func__);
1754
1755 IRDA_ASSERT(dev != NULL, return -1;);
1756 self = netdev_priv(dev);
1757 IRDA_ASSERT(self != NULL, return 0;);
1758
1759 /* Stop device */
1760 netif_stop_queue(dev);
1761
1762 /* Stop and remove instance of IrLAP */
1763 if (self->irlap)
1764 irlap_close(self->irlap);
1765 self->irlap = NULL;
1766
1767 smsc_ircc_stop_interrupts(self);
1768
1769 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1770 if (!self->io.suspended)
1771 free_irq(self->io.irq, dev);
1772
1773 disable_dma(self->io.dma);
1774 free_dma(self->io.dma);
1775
1776 return 0;
1777}
1778
1779static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
1780{
1781 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1782
1783 if (!self->io.suspended) {
1784 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1785
1786 rtnl_lock();
1787 if (netif_running(self->netdev)) {
1788 netif_device_detach(self->netdev);
1789 smsc_ircc_stop_interrupts(self);
1790 free_irq(self->io.irq, self->netdev);
1791 disable_dma(self->io.dma);
1792 }
1793 self->io.suspended = 1;
1794 rtnl_unlock();
1795 }
1796
1797 return 0;
1798}
1799
1800static int smsc_ircc_resume(struct platform_device *dev)
1801{
1802 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1803
1804 if (self->io.suspended) {
1805 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1806
1807 rtnl_lock();
1808 smsc_ircc_init_chip(self);
1809 if (netif_running(self->netdev)) {
1810 if (smsc_ircc_request_irq(self)) {
1811 /*
1812 * Don't fail resume process, just kill this
1813 * network interface
1814 */
1815 unregister_netdevice(self->netdev);
1816 } else {
1817 enable_dma(self->io.dma);
1818 smsc_ircc_start_interrupts(self);
1819 netif_device_attach(self->netdev);
1820 }
1821 }
1822 self->io.suspended = 0;
1823 rtnl_unlock();
1824 }
1825 return 0;
1826}
1827
1828/*
1829 * Function smsc_ircc_close (self)
1830 *
1831 * Close driver instance
1832 *
1833 */
1834static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1835{
1836 IRDA_DEBUG(1, "%s\n", __func__);
1837
1838 IRDA_ASSERT(self != NULL, return -1;);
1839
1840 platform_device_unregister(self->pldev);
1841
1842 /* Remove netdevice */
1843 unregister_netdev(self->netdev);
1844
1845 smsc_ircc_stop_interrupts(self);
1846
1847 /* Release the PORTS that this driver is using */
1848 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1849 self->io.fir_base);
1850
1851 release_region(self->io.fir_base, self->io.fir_ext);
1852
1853 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1854 self->io.sir_base);
1855
1856 release_region(self->io.sir_base, self->io.sir_ext);
1857
1858 if (self->tx_buff.head)
1859 dma_free_coherent(NULL, self->tx_buff.truesize,
1860 self->tx_buff.head, self->tx_buff_dma);
1861
1862 if (self->rx_buff.head)
1863 dma_free_coherent(NULL, self->rx_buff.truesize,
1864 self->rx_buff.head, self->rx_buff_dma);
1865
1866 free_netdev(self->netdev);
1867
1868 return 0;
1869}
1870
1871static void __exit smsc_ircc_cleanup(void)
1872{
1873 int i;
1874
1875 IRDA_DEBUG(1, "%s\n", __func__);
1876
1877 for (i = 0; i < 2; i++) {
1878 if (dev_self[i])
1879 smsc_ircc_close(dev_self[i]);
1880 }
1881
1882 if (pnp_driver_registered)
1883 pnp_unregister_driver(&smsc_ircc_pnp_driver);
1884
1885 platform_driver_unregister(&smsc_ircc_driver);
1886}
1887
1888/*
1889 * Start SIR operations
1890 *
1891 * This function *must* be called with spinlock held, because it may
1892 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1893 */
1894static void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1895{
1896 struct net_device *dev;
1897 int fir_base, sir_base;
1898
1899 IRDA_DEBUG(3, "%s\n", __func__);
1900
1901 IRDA_ASSERT(self != NULL, return;);
1902 dev = self->netdev;
1903 IRDA_ASSERT(dev != NULL, return;);
1904
1905 fir_base = self->io.fir_base;
1906 sir_base = self->io.sir_base;
1907
1908 /* Reset everything */
1909 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1910
1911 #if SMSC_IRCC2_C_SIR_STOP
1912 /*smsc_ircc_sir_stop(self);*/
1913 #endif
1914
1915 register_bank(fir_base, 1);
1916 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1917
1918 /* Initialize UART */
1919 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1920 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1921
1922 /* Turn on interrups */
1923 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1924
1925 IRDA_DEBUG(3, "%s() - exit\n", __func__);
1926
1927 outb(0x00, fir_base + IRCC_MASTER);
1928}
1929
1930#if SMSC_IRCC2_C_SIR_STOP
1931void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1932{
1933 int iobase;
1934
1935 IRDA_DEBUG(3, "%s\n", __func__);
1936 iobase = self->io.sir_base;
1937
1938 /* Reset UART */
1939 outb(0, iobase + UART_MCR);
1940
1941 /* Turn off interrupts */
1942 outb(0, iobase + UART_IER);
1943}
1944#endif
1945
1946/*
1947 * Function smsc_sir_write_wakeup (self)
1948 *
1949 * Called by the SIR interrupt handler when there's room for more data.
1950 * If we have more packets to send, we send them here.
1951 *
1952 */
1953static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1954{
1955 int actual = 0;
1956 int iobase;
1957 int fcr;
1958
1959 IRDA_ASSERT(self != NULL, return;);
1960
1961 IRDA_DEBUG(4, "%s\n", __func__);
1962
1963 iobase = self->io.sir_base;
1964
1965 /* Finished with frame? */
1966 if (self->tx_buff.len > 0) {
1967 /* Write data left in transmit buffer */
1968 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1969 self->tx_buff.data, self->tx_buff.len);
1970 self->tx_buff.data += actual;
1971 self->tx_buff.len -= actual;
1972 } else {
1973
1974 /*if (self->tx_buff.len ==0) {*/
1975
1976 /*
1977 * Now serial buffer is almost free & we can start
1978 * transmission of another packet. But first we must check
1979 * if we need to change the speed of the hardware
1980 */
1981 if (self->new_speed) {
1982 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1983 __func__, self->new_speed);
1984 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1985 smsc_ircc_change_speed(self, self->new_speed);
1986 self->new_speed = 0;
1987 } else {
1988 /* Tell network layer that we want more frames */
1989 netif_wake_queue(self->netdev);
1990 }
1991 self->netdev->stats.tx_packets++;
1992
1993 if (self->io.speed <= 115200) {
1994 /*
1995 * Reset Rx FIFO to make sure that all reflected transmit data
1996 * is discarded. This is needed for half duplex operation
1997 */
1998 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
1999 fcr |= self->io.speed < 38400 ?
2000 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
2001
2002 outb(fcr, iobase + UART_FCR);
2003
2004 /* Turn on receive interrupts */
2005 outb(UART_IER_RDI, iobase + UART_IER);
2006 }
2007 }
2008}
2009
2010/*
2011 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
2012 *
2013 * Fill Tx FIFO with transmit data
2014 *
2015 */
2016static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
2017{
2018 int actual = 0;
2019
2020 /* Tx FIFO should be empty! */
2021 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
2022 IRDA_WARNING("%s(), failed, fifo not empty!\n", __func__);
2023 return 0;
2024 }
2025
2026 /* Fill FIFO with current frame */
2027 while (fifo_size-- > 0 && actual < len) {
2028 /* Transmit next byte */
2029 outb(buf[actual], iobase + UART_TX);
2030 actual++;
2031 }
2032 return actual;
2033}
2034
2035/*
2036 * Function smsc_ircc_is_receiving (self)
2037 *
2038 * Returns true is we are currently receiving data
2039 *
2040 */
2041static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
2042{
2043 return self->rx_buff.state != OUTSIDE_FRAME;
2044}
2045
2046
2047/*
2048 * Function smsc_ircc_probe_transceiver(self)
2049 *
2050 * Tries to find the used Transceiver
2051 *
2052 */
2053static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
2054{
2055 unsigned int i;
2056
2057 IRDA_ASSERT(self != NULL, return;);
2058
2059 for (i = 0; smsc_transceivers[i].name != NULL; i++)
2060 if (smsc_transceivers[i].probe(self->io.fir_base)) {
2061 IRDA_MESSAGE(" %s transceiver found\n",
2062 smsc_transceivers[i].name);
2063 self->transceiver= i + 1;
2064 return;
2065 }
2066
2067 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
2068 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
2069
2070 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
2071}
2072
2073
2074/*
2075 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
2076 *
2077 * Set the transceiver according to the speed
2078 *
2079 */
2080static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
2081{
2082 unsigned int trx;
2083
2084 trx = self->transceiver;
2085 if (trx > 0)
2086 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
2087}
2088
2089/*
2090 * Function smsc_ircc_wait_hw_transmitter_finish ()
2091 *
2092 * Wait for the real end of HW transmission
2093 *
2094 * The UART is a strict FIFO, and we get called only when we have finished
2095 * pushing data to the FIFO, so the maximum amount of time we must wait
2096 * is only for the FIFO to drain out.
2097 *
2098 * We use a simple calibrated loop. We may need to adjust the loop
2099 * delay (udelay) to balance I/O traffic and latency. And we also need to
2100 * adjust the maximum timeout.
2101 * It would probably be better to wait for the proper interrupt,
2102 * but it doesn't seem to be available.
2103 *
2104 * We can't use jiffies or kernel timers because :
2105 * 1) We are called from the interrupt handler, which disable softirqs,
2106 * so jiffies won't be increased
2107 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2108 * want to wait that long to detect stuck hardware.
2109 * Jean II
2110 */
2111
2112static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2113{
2114 int iobase = self->io.sir_base;
2115 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2116
2117 /* Calibrated busy loop */
2118 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2119 udelay(1);
2120
2121 if (count < 0)
2122 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __func__);
2123}
2124
2125
2126/* PROBING
2127 *
2128 * REVISIT we can be told about the device by PNP, and should use that info
2129 * instead of probing hardware and creating a platform_device ...
2130 */
2131
2132static int __init smsc_ircc_look_for_chips(void)
2133{
2134 struct smsc_chip_address *address;
2135 char *type;
2136 unsigned int cfg_base, found;
2137
2138 found = 0;
2139 address = possible_addresses;
2140
2141 while (address->cfg_base) {
2142 cfg_base = address->cfg_base;
2143
2144 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __func__, cfg_base, address->type);*/
2145
2146 if (address->type & SMSCSIO_TYPE_FDC) {
2147 type = "FDC";
2148 if (address->type & SMSCSIO_TYPE_FLAT)
2149 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2150 found++;
2151
2152 if (address->type & SMSCSIO_TYPE_PAGED)
2153 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2154 found++;
2155 }
2156 if (address->type & SMSCSIO_TYPE_LPC) {
2157 type = "LPC";
2158 if (address->type & SMSCSIO_TYPE_FLAT)
2159 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2160 found++;
2161
2162 if (address->type & SMSCSIO_TYPE_PAGED)
2163 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2164 found++;
2165 }
2166 address++;
2167 }
2168 return found;
2169}
2170
2171/*
2172 * Function smsc_superio_flat (chip, base, type)
2173 *
2174 * Try to get configuration of a smc SuperIO chip with flat register model
2175 *
2176 */
2177static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2178{
2179 unsigned short firbase, sirbase;
2180 u8 mode, dma, irq;
2181 int ret = -ENODEV;
2182
2183 IRDA_DEBUG(1, "%s\n", __func__);
2184
2185 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2186 return ret;
2187
2188 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2189 mode = inb(cfgbase + 1);
2190
2191 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __func__, mode);*/
2192
2193 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2194 IRDA_WARNING("%s(): IrDA not enabled\n", __func__);
2195
2196 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2197 sirbase = inb(cfgbase + 1) << 2;
2198
2199 /* FIR iobase */
2200 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2201 firbase = inb(cfgbase + 1) << 3;
2202
2203 /* DMA */
2204 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2205 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2206
2207 /* IRQ */
2208 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2209 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2210
2211 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __func__, firbase, sirbase, dma, irq, mode);
2212
2213 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2214 ret = 0;
2215
2216 /* Exit configuration */
2217 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2218
2219 return ret;
2220}
2221
2222/*
2223 * Function smsc_superio_paged (chip, base, type)
2224 *
2225 * Try to get configuration of a smc SuperIO chip with paged register model
2226 *
2227 */
2228static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2229{
2230 unsigned short fir_io, sir_io;
2231 int ret = -ENODEV;
2232
2233 IRDA_DEBUG(1, "%s\n", __func__);
2234
2235 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2236 return ret;
2237
2238 /* Select logical device (UART2) */
2239 outb(0x07, cfg_base);
2240 outb(0x05, cfg_base + 1);
2241
2242 /* SIR iobase */
2243 outb(0x60, cfg_base);
2244 sir_io = inb(cfg_base + 1) << 8;
2245 outb(0x61, cfg_base);
2246 sir_io |= inb(cfg_base + 1);
2247
2248 /* Read FIR base */
2249 outb(0x62, cfg_base);
2250 fir_io = inb(cfg_base + 1) << 8;
2251 outb(0x63, cfg_base);
2252 fir_io |= inb(cfg_base + 1);
2253 outb(0x2b, cfg_base); /* ??? */
2254
2255 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2256 ret = 0;
2257
2258 /* Exit configuration */
2259 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2260
2261 return ret;
2262}
2263
2264
2265static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2266{
2267 IRDA_DEBUG(1, "%s\n", __func__);
2268
2269 outb(reg, cfg_base);
2270 return inb(cfg_base) != reg ? -1 : 0;
2271}
2272
2273static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2274{
2275 u8 devid, xdevid, rev;
2276
2277 IRDA_DEBUG(1, "%s\n", __func__);
2278
2279 /* Leave configuration */
2280
2281 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2282
2283 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2284 return NULL;
2285
2286 outb(reg, cfg_base);
2287
2288 xdevid = inb(cfg_base + 1);
2289
2290 /* Enter configuration */
2291
2292 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2293
2294 #if 0
2295 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2296 return NULL;
2297 #endif
2298
2299 /* probe device ID */
2300
2301 if (smsc_access(cfg_base, reg))
2302 return NULL;
2303
2304 devid = inb(cfg_base + 1);
2305
2306 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2307 return NULL;
2308
2309 /* probe revision ID */
2310
2311 if (smsc_access(cfg_base, reg + 1))
2312 return NULL;
2313
2314 rev = inb(cfg_base + 1);
2315
2316 if (rev >= 128) /* i think this will make no sense */
2317 return NULL;
2318
2319 if (devid == xdevid) /* protection against false positives */
2320 return NULL;
2321
2322 /* Check for expected device ID; are there others? */
2323
2324 while (chip->devid != devid) {
2325
2326 chip++;
2327
2328 if (chip->name == NULL)
2329 return NULL;
2330 }
2331
2332 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2333 devid, rev, cfg_base, type, chip->name);
2334
2335 if (chip->rev > rev) {
2336 IRDA_MESSAGE("Revision higher than expected\n");
2337 return NULL;
2338 }
2339
2340 if (chip->flags & NoIRDA)
2341 IRDA_MESSAGE("chipset does not support IRDA\n");
2342
2343 return chip;
2344}
2345
2346static int __init smsc_superio_fdc(unsigned short cfg_base)
2347{
2348 int ret = -1;
2349
2350 if (!request_region(cfg_base, 2, driver_name)) {
2351 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2352 __func__, cfg_base);
2353 } else {
2354 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2355 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2356 ret = 0;
2357
2358 release_region(cfg_base, 2);
2359 }
2360
2361 return ret;
2362}
2363
2364static int __init smsc_superio_lpc(unsigned short cfg_base)
2365{
2366 int ret = -1;
2367
2368 if (!request_region(cfg_base, 2, driver_name)) {
2369 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2370 __func__, cfg_base);
2371 } else {
2372 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2373 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2374 ret = 0;
2375
2376 release_region(cfg_base, 2);
2377 }
2378 return ret;
2379}
2380
2381/*
2382 * Look for some specific subsystem setups that need
2383 * pre-configuration not properly done by the BIOS (especially laptops)
2384 * This code is based in part on smcinit.c, tosh1800-smcinit.c
2385 * and tosh2450-smcinit.c. The table lists the device entries
2386 * for ISA bridges with an LPC (Low Pin Count) controller which
2387 * handles the communication with the SMSC device. After the LPC
2388 * controller is initialized through PCI, the SMSC device is initialized
2389 * through a dedicated port in the ISA port-mapped I/O area, this latter
2390 * area is used to configure the SMSC device with default
2391 * SIR and FIR I/O ports, DMA and IRQ. Different vendors have
2392 * used different sets of parameters and different control port
2393 * addresses making a subsystem device table necessary.
2394 */
2395#ifdef CONFIG_PCI
2396static struct smsc_ircc_subsystem_configuration subsystem_configurations[] __initdata = {
2397 /*
2398 * Subsystems needing entries:
2399 * 0x10b9:0x1533 0x103c:0x0850 HP nx9010 family
2400 * 0x10b9:0x1533 0x0e11:0x005a Compaq nc4000 family
2401 * 0x8086:0x24cc 0x0e11:0x002a HP nx9000 family
2402 */
2403 {
2404 /* Guessed entry */
2405 .vendor = PCI_VENDOR_ID_INTEL, /* Intel 82801DBM LPC bridge */
2406 .device = 0x24cc,
2407 .subvendor = 0x103c,
2408 .subdevice = 0x08bc,
2409 .sir_io = 0x02f8,
2410 .fir_io = 0x0130,
2411 .fir_irq = 0x05,
2412 .fir_dma = 0x03,
2413 .cfg_base = 0x004e,
2414 .preconfigure = preconfigure_through_82801,
2415 .name = "HP nx5000 family",
2416 },
2417 {
2418 .vendor = PCI_VENDOR_ID_INTEL, /* Intel 82801DBM LPC bridge */
2419 .device = 0x24cc,
2420 .subvendor = 0x103c,
2421 .subdevice = 0x088c,
2422 /* Quite certain these are the same for nc8000 as for nc6000 */
2423 .sir_io = 0x02f8,
2424 .fir_io = 0x0130,
2425 .fir_irq = 0x05,
2426 .fir_dma = 0x03,
2427 .cfg_base = 0x004e,
2428 .preconfigure = preconfigure_through_82801,
2429 .name = "HP nc8000 family",
2430 },
2431 {
2432 .vendor = PCI_VENDOR_ID_INTEL, /* Intel 82801DBM LPC bridge */
2433 .device = 0x24cc,
2434 .subvendor = 0x103c,
2435 .subdevice = 0x0890,
2436 .sir_io = 0x02f8,
2437 .fir_io = 0x0130,
2438 .fir_irq = 0x05,
2439 .fir_dma = 0x03,
2440 .cfg_base = 0x004e,
2441 .preconfigure = preconfigure_through_82801,
2442 .name = "HP nc6000 family",
2443 },
2444 {
2445 .vendor = PCI_VENDOR_ID_INTEL, /* Intel 82801DBM LPC bridge */
2446 .device = 0x24cc,
2447 .subvendor = 0x0e11,
2448 .subdevice = 0x0860,
2449 /* I assume these are the same for x1000 as for the others */
2450 .sir_io = 0x02e8,
2451 .fir_io = 0x02f8,
2452 .fir_irq = 0x07,
2453 .fir_dma = 0x03,
2454 .cfg_base = 0x002e,
2455 .preconfigure = preconfigure_through_82801,
2456 .name = "Compaq x1000 family",
2457 },
2458 {
2459 /* Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge */
2460 .vendor = PCI_VENDOR_ID_INTEL,
2461 .device = 0x24c0,
2462 .subvendor = 0x1179,
2463 .subdevice = 0xffff, /* 0xffff is "any" */
2464 .sir_io = 0x03f8,
2465 .fir_io = 0x0130,
2466 .fir_irq = 0x07,
2467 .fir_dma = 0x01,
2468 .cfg_base = 0x002e,
2469 .preconfigure = preconfigure_through_82801,
2470 .name = "Toshiba laptop with Intel 82801DB/DBL LPC bridge",
2471 },
2472 {
2473 .vendor = PCI_VENDOR_ID_INTEL, /* Intel 82801CAM ISA bridge */
2474 .device = 0x248c,
2475 .subvendor = 0x1179,
2476 .subdevice = 0xffff, /* 0xffff is "any" */
2477 .sir_io = 0x03f8,
2478 .fir_io = 0x0130,
2479 .fir_irq = 0x03,
2480 .fir_dma = 0x03,
2481 .cfg_base = 0x002e,
2482 .preconfigure = preconfigure_through_82801,
2483 .name = "Toshiba laptop with Intel 82801CAM ISA bridge",
2484 },
2485 {
2486 /* 82801DBM (ICH4-M) LPC Interface Bridge */
2487 .vendor = PCI_VENDOR_ID_INTEL,
2488 .device = 0x24cc,
2489 .subvendor = 0x1179,
2490 .subdevice = 0xffff, /* 0xffff is "any" */
2491 .sir_io = 0x03f8,
2492 .fir_io = 0x0130,
2493 .fir_irq = 0x03,
2494 .fir_dma = 0x03,
2495 .cfg_base = 0x002e,
2496 .preconfigure = preconfigure_through_82801,
2497 .name = "Toshiba laptop with Intel 8281DBM LPC bridge",
2498 },
2499 {
2500 /* ALi M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] */
2501 .vendor = PCI_VENDOR_ID_AL,
2502 .device = 0x1533,
2503 .subvendor = 0x1179,
2504 .subdevice = 0xffff, /* 0xffff is "any" */
2505 .sir_io = 0x02e8,
2506 .fir_io = 0x02f8,
2507 .fir_irq = 0x07,
2508 .fir_dma = 0x03,
2509 .cfg_base = 0x002e,
2510 .preconfigure = preconfigure_through_ali,
2511 .name = "Toshiba laptop with ALi ISA bridge",
2512 },
2513 { } // Terminator
2514};
2515
2516
2517/*
2518 * This sets up the basic SMSC parameters
2519 * (FIR port, SIR port, FIR DMA, FIR IRQ)
2520 * through the chip configuration port.
2521 */
2522static int __init preconfigure_smsc_chip(struct
2523 smsc_ircc_subsystem_configuration
2524 *conf)
2525{
2526 unsigned short iobase = conf->cfg_base;
2527 unsigned char tmpbyte;
2528
2529 outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state
2530 outb(SMSCSIOFLAT_DEVICEID_REG, iobase); // set for device ID
2531 tmpbyte = inb(iobase +1); // Read device ID
2532 IRDA_DEBUG(0,
2533 "Detected Chip id: 0x%02x, setting up registers...\n",
2534 tmpbyte);
2535
2536 /* Disable UART1 and set up SIR I/O port */
2537 outb(0x24, iobase); // select CR24 - UART1 base addr
2538 outb(0x00, iobase + 1); // disable UART1
2539 outb(SMSCSIOFLAT_UART2BASEADDR_REG, iobase); // select CR25 - UART2 base addr
2540 outb( (conf->sir_io >> 2), iobase + 1); // bits 2-9 of 0x3f8
2541 tmpbyte = inb(iobase + 1);
2542 if (tmpbyte != (conf->sir_io >> 2) ) {
2543 IRDA_WARNING("ERROR: could not configure SIR ioport.\n");
2544 IRDA_WARNING("Try to supply ircc_cfg argument.\n");
2545 return -ENXIO;
2546 }
2547
2548 /* Set up FIR IRQ channel for UART2 */
2549 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, iobase); // select CR28 - UART1,2 IRQ select
2550 tmpbyte = inb(iobase + 1);
2551 tmpbyte &= SMSCSIOFLAT_UART1IRQSELECT_MASK; // Do not touch the UART1 portion
2552 tmpbyte |= (conf->fir_irq & SMSCSIOFLAT_UART2IRQSELECT_MASK);
2553 outb(tmpbyte, iobase + 1);
2554 tmpbyte = inb(iobase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2555 if (tmpbyte != conf->fir_irq) {
2556 IRDA_WARNING("ERROR: could not configure FIR IRQ channel.\n");
2557 return -ENXIO;
2558 }
2559
2560 /* Set up FIR I/O port */
2561 outb(SMSCSIOFLAT_FIRBASEADDR_REG, iobase); // CR2B - SCE (FIR) base addr
2562 outb((conf->fir_io >> 3), iobase + 1);
2563 tmpbyte = inb(iobase + 1);
2564 if (tmpbyte != (conf->fir_io >> 3) ) {
2565 IRDA_WARNING("ERROR: could not configure FIR I/O port.\n");
2566 return -ENXIO;
2567 }
2568
2569 /* Set up FIR DMA channel */
2570 outb(SMSCSIOFLAT_FIRDMASELECT_REG, iobase); // CR2C - SCE (FIR) DMA select
2571 outb((conf->fir_dma & LPC47N227_FIRDMASELECT_MASK), iobase + 1); // DMA
2572 tmpbyte = inb(iobase + 1) & LPC47N227_FIRDMASELECT_MASK;
2573 if (tmpbyte != (conf->fir_dma & LPC47N227_FIRDMASELECT_MASK)) {
2574 IRDA_WARNING("ERROR: could not configure FIR DMA channel.\n");
2575 return -ENXIO;
2576 }
2577
2578 outb(SMSCSIOFLAT_UARTMODE0C_REG, iobase); // CR0C - UART mode
2579 tmpbyte = inb(iobase + 1);
2580 tmpbyte &= ~SMSCSIOFLAT_UART2MODE_MASK |
2581 SMSCSIOFLAT_UART2MODE_VAL_IRDA;
2582 outb(tmpbyte, iobase + 1); // enable IrDA (HPSIR) mode, high speed
2583
2584 outb(LPC47N227_APMBOOTDRIVE_REG, iobase); // CR07 - Auto Pwr Mgt/boot drive sel
2585 tmpbyte = inb(iobase + 1);
2586 outb(tmpbyte | LPC47N227_UART2AUTOPWRDOWN_MASK, iobase + 1); // enable UART2 autopower down
2587
2588 /* This one was not part of tosh1800 */
2589 outb(0x0a, iobase); // CR0a - ecp fifo / ir mux
2590 tmpbyte = inb(iobase + 1);
2591 outb(tmpbyte | 0x40, iobase + 1); // send active device to ir port
2592
2593 outb(LPC47N227_UART12POWER_REG, iobase); // CR02 - UART 1,2 power
2594 tmpbyte = inb(iobase + 1);
2595 outb(tmpbyte | LPC47N227_UART2POWERDOWN_MASK, iobase + 1); // UART2 power up mode, UART1 power down
2596
2597 outb(LPC47N227_FDCPOWERVALIDCONF_REG, iobase); // CR00 - FDC Power/valid config cycle
2598 tmpbyte = inb(iobase + 1);
2599 outb(tmpbyte | LPC47N227_VALID_MASK, iobase + 1); // valid config cycle done
2600
2601 outb(LPC47N227_CFGEXITKEY, iobase); // Exit configuration
2602
2603 return 0;
2604}
2605
2606/* 82801CAM generic registers */
2607#define VID 0x00
2608#define DID 0x02
2609#define PIRQ_A_D_ROUT 0x60
2610#define SIRQ_CNTL 0x64
2611#define PIRQ_E_H_ROUT 0x68
2612#define PCI_DMA_C 0x90
2613/* LPC-specific registers */
2614#define COM_DEC 0xe0
2615#define GEN1_DEC 0xe4
2616#define LPC_EN 0xe6
2617#define GEN2_DEC 0xec
2618/*
2619 * Sets up the I/O range using the 82801CAM ISA bridge, 82801DBM LPC bridge
2620 * or Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge.
2621 * They all work the same way!
2622 */
2623static int __init preconfigure_through_82801(struct pci_dev *dev,
2624 struct
2625 smsc_ircc_subsystem_configuration
2626 *conf)
2627{
2628 unsigned short tmpword;
2629 unsigned char tmpbyte;
2630
2631 IRDA_MESSAGE("Setting up Intel 82801 controller and SMSC device\n");
2632 /*
2633 * Select the range for the COMA COM port (SIR)
2634 * Register COM_DEC:
2635 * Bit 7: reserved
2636 * Bit 6-4, COMB decode range
2637 * Bit 3: reserved
2638 * Bit 2-0, COMA decode range
2639 *
2640 * Decode ranges:
2641 * 000 = 0x3f8-0x3ff (COM1)
2642 * 001 = 0x2f8-0x2ff (COM2)
2643 * 010 = 0x220-0x227
2644 * 011 = 0x228-0x22f
2645 * 100 = 0x238-0x23f
2646 * 101 = 0x2e8-0x2ef (COM4)
2647 * 110 = 0x338-0x33f
2648 * 111 = 0x3e8-0x3ef (COM3)
2649 */
2650 pci_read_config_byte(dev, COM_DEC, &tmpbyte);
2651 tmpbyte &= 0xf8; /* mask COMA bits */
2652 switch(conf->sir_io) {
2653 case 0x3f8:
2654 tmpbyte |= 0x00;
2655 break;
2656 case 0x2f8:
2657 tmpbyte |= 0x01;
2658 break;
2659 case 0x220:
2660 tmpbyte |= 0x02;
2661 break;
2662 case 0x228:
2663 tmpbyte |= 0x03;
2664 break;
2665 case 0x238:
2666 tmpbyte |= 0x04;
2667 break;
2668 case 0x2e8:
2669 tmpbyte |= 0x05;
2670 break;
2671 case 0x338:
2672 tmpbyte |= 0x06;
2673 break;
2674 case 0x3e8:
2675 tmpbyte |= 0x07;
2676 break;
2677 default:
2678 tmpbyte |= 0x01; /* COM2 default */
2679 }
2680 IRDA_DEBUG(1, "COM_DEC (write): 0x%02x\n", tmpbyte);
2681 pci_write_config_byte(dev, COM_DEC, tmpbyte);
2682
2683 /* Enable Low Pin Count interface */
2684 pci_read_config_word(dev, LPC_EN, &tmpword);
2685 /* These seem to be set up at all times,
2686 * just make sure it is properly set.
2687 */
2688 switch(conf->cfg_base) {
2689 case 0x04e:
2690 tmpword |= 0x2000;
2691 break;
2692 case 0x02e:
2693 tmpword |= 0x1000;
2694 break;
2695 case 0x062:
2696 tmpword |= 0x0800;
2697 break;
2698 case 0x060:
2699 tmpword |= 0x0400;
2700 break;
2701 default:
2702 IRDA_WARNING("Uncommon I/O base address: 0x%04x\n",
2703 conf->cfg_base);
2704 break;
2705 }
2706 tmpword &= 0xfffd; /* disable LPC COMB */
2707 tmpword |= 0x0001; /* set bit 0 : enable LPC COMA addr range (GEN2) */
2708 IRDA_DEBUG(1, "LPC_EN (write): 0x%04x\n", tmpword);
2709 pci_write_config_word(dev, LPC_EN, tmpword);
2710
2711 /*
2712 * Configure LPC DMA channel
2713 * PCI_DMA_C bits:
2714 * Bit 15-14: DMA channel 7 select
2715 * Bit 13-12: DMA channel 6 select
2716 * Bit 11-10: DMA channel 5 select
2717 * Bit 9-8: Reserved
2718 * Bit 7-6: DMA channel 3 select
2719 * Bit 5-4: DMA channel 2 select
2720 * Bit 3-2: DMA channel 1 select
2721 * Bit 1-0: DMA channel 0 select
2722 * 00 = Reserved value
2723 * 01 = PC/PCI DMA
2724 * 10 = Reserved value
2725 * 11 = LPC I/F DMA
2726 */
2727 pci_read_config_word(dev, PCI_DMA_C, &tmpword);
2728 switch(conf->fir_dma) {
2729 case 0x07:
2730 tmpword |= 0xc000;
2731 break;
2732 case 0x06:
2733 tmpword |= 0x3000;
2734 break;
2735 case 0x05:
2736 tmpword |= 0x0c00;
2737 break;
2738 case 0x03:
2739 tmpword |= 0x00c0;
2740 break;
2741 case 0x02:
2742 tmpword |= 0x0030;
2743 break;
2744 case 0x01:
2745 tmpword |= 0x000c;
2746 break;
2747 case 0x00:
2748 tmpword |= 0x0003;
2749 break;
2750 default:
2751 break; /* do not change settings */
2752 }
2753 IRDA_DEBUG(1, "PCI_DMA_C (write): 0x%04x\n", tmpword);
2754 pci_write_config_word(dev, PCI_DMA_C, tmpword);
2755
2756 /*
2757 * GEN2_DEC bits:
2758 * Bit 15-4: Generic I/O range
2759 * Bit 3-1: reserved (read as 0)
2760 * Bit 0: enable GEN2 range on LPC I/F
2761 */
2762 tmpword = conf->fir_io & 0xfff8;
2763 tmpword |= 0x0001;
2764 IRDA_DEBUG(1, "GEN2_DEC (write): 0x%04x\n", tmpword);
2765 pci_write_config_word(dev, GEN2_DEC, tmpword);
2766
2767 /* Pre-configure chip */
2768 return preconfigure_smsc_chip(conf);
2769}
2770
2771/*
2772 * Pre-configure a certain port on the ALi 1533 bridge.
2773 * This is based on reverse-engineering since ALi does not
2774 * provide any data sheet for the 1533 chip.
2775 */
2776static void __init preconfigure_ali_port(struct pci_dev *dev,
2777 unsigned short port)
2778{
2779 unsigned char reg;
2780 /* These bits obviously control the different ports */
2781 unsigned char mask;
2782 unsigned char tmpbyte;
2783
2784 switch(port) {
2785 case 0x0130:
2786 case 0x0178:
2787 reg = 0xb0;
2788 mask = 0x80;
2789 break;
2790 case 0x03f8:
2791 reg = 0xb4;
2792 mask = 0x80;
2793 break;
2794 case 0x02f8:
2795 reg = 0xb4;
2796 mask = 0x30;
2797 break;
2798 case 0x02e8:
2799 reg = 0xb4;
2800 mask = 0x08;
2801 break;
2802 default:
2803 IRDA_ERROR("Failed to configure unsupported port on ALi 1533 bridge: 0x%04x\n", port);
2804 return;
2805 }
2806
2807 pci_read_config_byte(dev, reg, &tmpbyte);
2808 /* Turn on the right bits */
2809 tmpbyte |= mask;
2810 pci_write_config_byte(dev, reg, tmpbyte);
2811 IRDA_MESSAGE("Activated ALi 1533 ISA bridge port 0x%04x.\n", port);
2812}
2813
2814static int __init preconfigure_through_ali(struct pci_dev *dev,
2815 struct
2816 smsc_ircc_subsystem_configuration
2817 *conf)
2818{
2819 /* Configure the two ports on the ALi 1533 */
2820 preconfigure_ali_port(dev, conf->sir_io);
2821 preconfigure_ali_port(dev, conf->fir_io);
2822
2823 /* Pre-configure chip */
2824 return preconfigure_smsc_chip(conf);
2825}
2826
2827static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
2828 unsigned short ircc_fir,
2829 unsigned short ircc_sir,
2830 unsigned char ircc_dma,
2831 unsigned char ircc_irq)
2832{
2833 struct pci_dev *dev = NULL;
2834 unsigned short ss_vendor = 0x0000;
2835 unsigned short ss_device = 0x0000;
2836 int ret = 0;
2837
2838 for_each_pci_dev(dev) {
2839 struct smsc_ircc_subsystem_configuration *conf;
2840
2841 /*
2842 * Cache the subsystem vendor/device:
2843 * some manufacturers fail to set this for all components,
2844 * so we save it in case there is just 0x0000 0x0000 on the
2845 * device we want to check.
2846 */
2847 if (dev->subsystem_vendor != 0x0000U) {
2848 ss_vendor = dev->subsystem_vendor;
2849 ss_device = dev->subsystem_device;
2850 }
2851 conf = subsystem_configurations;
2852 for( ; conf->subvendor; conf++) {
2853 if(conf->vendor == dev->vendor &&
2854 conf->device == dev->device &&
2855 conf->subvendor == ss_vendor &&
2856 /* Sometimes these are cached values */
2857 (conf->subdevice == ss_device ||
2858 conf->subdevice == 0xffff)) {
2859 struct smsc_ircc_subsystem_configuration
2860 tmpconf;
2861
2862 memcpy(&tmpconf, conf,
2863 sizeof(struct smsc_ircc_subsystem_configuration));
2864
2865 /*
2866 * Override the default values with anything
2867 * passed in as parameter
2868 */
2869 if (ircc_cfg != 0)
2870 tmpconf.cfg_base = ircc_cfg;
2871 if (ircc_fir != 0)
2872 tmpconf.fir_io = ircc_fir;
2873 if (ircc_sir != 0)
2874 tmpconf.sir_io = ircc_sir;
2875 if (ircc_dma != DMA_INVAL)
2876 tmpconf.fir_dma = ircc_dma;
2877 if (ircc_irq != IRQ_INVAL)
2878 tmpconf.fir_irq = ircc_irq;
2879
2880 IRDA_MESSAGE("Detected unconfigured %s SMSC IrDA chip, pre-configuring device.\n", conf->name);
2881 if (conf->preconfigure)
2882 ret = conf->preconfigure(dev, &tmpconf);
2883 else
2884 ret = -ENODEV;
2885 }
2886 }
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
2907static 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
2936static 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
2948static 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
2973static 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
2985static 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
3012static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
3013{
3014 return 0;
3015}
3016
3017
3018module_init(smsc_ircc_init);
3019module_exit(smsc_ircc_cleanup);