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x86/amd-iommu: Add function to complete a tlb flush
[linux/fpc-iii.git] / drivers / net / irda / smsc-ircc2.c
blob1e8dd8c74a64f305bfbddeecb86dcec850bf3aff
1 /*********************************************************************
2 *
3 * Description: Driver for the SMC Infrared Communications Controller
4 * Status: Experimental.
5 * Author: Daniele Peri (peri@csai.unipa.it)
6 * Created at:
7 * Modified at:
8 * Modified by:
9 *
10 * Copyright (c) 2002 Daniele Peri
11 * All Rights Reserved.
12 * Copyright (c) 2002 Jean Tourrilhes
13 * Copyright (c) 2006 Linus Walleij
14 *
15 *
16 * Based on smc-ircc.c:
17 *
18 * Copyright (c) 2001 Stefani Seibold
19 * Copyright (c) 1999-2001 Dag Brattli
20 * Copyright (c) 1998-1999 Thomas Davis,
21 *
22 * and irport.c:
23 *
24 * Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
25 *
26 *
27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License as
29 * published by the Free Software Foundation; either version 2 of
30 * the License, or (at your option) any later version.
31 *
32 * This program is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 * GNU General Public License for more details.
36 *
37 * You should have received a copy of the GNU General Public License
38 * along with this program; if not, write to the Free Software
39 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
40 * MA 02111-1307 USA
41 *
42 ********************************************************************/
43
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/types.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/ioport.h>
50 #include <linux/delay.h>
51 #include <linux/slab.h>
52 #include <linux/init.h>
53 #include <linux/rtnetlink.h>
54 #include <linux/serial_reg.h>
55 #include <linux/dma-mapping.h>
56 #include <linux/pnp.h>
57 #include <linux/platform_device.h>
58
59 #include <asm/io.h>
60 #include <asm/dma.h>
61 #include <asm/byteorder.h>
62
63 #include <linux/spinlock.h>
64 #include <linux/pm.h>
65 #ifdef CONFIG_PCI
66 #include <linux/pci.h>
67 #endif
68
69 #include <net/irda/wrapper.h>
70 #include <net/irda/irda.h>
71 #include <net/irda/irda_device.h>
72
73 #include "smsc-ircc2.h"
74 #include "smsc-sio.h"
75
76
77 MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
78 MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
79 MODULE_LICENSE("GPL");
80
81 static int smsc_nopnp = 1;
82 module_param_named(nopnp, smsc_nopnp, bool, 0);
83 MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings, defaults to true");
84
85 #define DMA_INVAL 255
86 static int ircc_dma = DMA_INVAL;
87 module_param(ircc_dma, int, 0);
88 MODULE_PARM_DESC(ircc_dma, "DMA channel");
89
90 #define IRQ_INVAL 255
91 static int ircc_irq = IRQ_INVAL;
92 module_param(ircc_irq, int, 0);
93 MODULE_PARM_DESC(ircc_irq, "IRQ line");
94
95 static int ircc_fir;
96 module_param(ircc_fir, int, 0);
97 MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
98
99 static int ircc_sir;
100 module_param(ircc_sir, int, 0);
101 MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
102
103 static int ircc_cfg;
104 module_param(ircc_cfg, int, 0);
105 MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
106
107 static int ircc_transceiver;
108 module_param(ircc_transceiver, int, 0);
109 MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
110
111 /* Types */
112
113 #ifdef CONFIG_PCI
114 struct smsc_ircc_subsystem_configuration {
115 unsigned short vendor; /* PCI vendor ID */
116 unsigned short device; /* PCI vendor ID */
117 unsigned short subvendor; /* PCI subsystem vendor ID */
118 unsigned short subdevice; /* PCI sybsystem device ID */
119 unsigned short sir_io; /* I/O port for SIR */
120 unsigned short fir_io; /* I/O port for FIR */
121 unsigned char fir_irq; /* FIR IRQ */
122 unsigned char fir_dma; /* FIR DMA */
123 unsigned short cfg_base; /* I/O port for chip configuration */
124 int (*preconfigure)(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf); /* Preconfig function */
125 const char *name; /* name shown as info */
126 };
127 #endif
128
129 struct smsc_transceiver {
130 char *name;
131 void (*set_for_speed)(int fir_base, u32 speed);
132 int (*probe)(int fir_base);
133 };
134
135 struct smsc_chip {
136 char *name;
137 #if 0
138 u8 type;
139 #endif
140 u16 flags;
141 u8 devid;
142 u8 rev;
143 };
144
145 struct smsc_chip_address {
146 unsigned int cfg_base;
147 unsigned int type;
148 };
149
150 /* Private data for each instance */
151 struct smsc_ircc_cb {
152 struct net_device *netdev; /* Yes! we are some kind of netdevice */
153 struct irlap_cb *irlap; /* The link layer we are binded to */
154
155 chipio_t io; /* IrDA controller information */
156 iobuff_t tx_buff; /* Transmit buffer */
157 iobuff_t rx_buff; /* Receive buffer */
158 dma_addr_t tx_buff_dma;
159 dma_addr_t rx_buff_dma;
160
161 struct qos_info qos; /* QoS capabilities for this device */
162
163 spinlock_t lock; /* For serializing operations */
164
165 __u32 new_speed;
166 __u32 flags; /* Interface flags */
167
168 int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
169 int tx_len; /* Number of frames in tx_buff */
170
171 int transceiver;
172 struct platform_device *pldev;
173 };
174
175 /* Constants */
176
177 #define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
178
179 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
180 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
181 #define SMSC_IRCC2_C_NET_TIMEOUT 0
182 #define SMSC_IRCC2_C_SIR_STOP 0
183
184 static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
185
186 /* Prototypes */
187
188 static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
189 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
190 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
191 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
192 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
193 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
194 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
195 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
196 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
197 static netdev_tx_t smsc_ircc_hard_xmit_sir(struct sk_buff *skb,
198 struct net_device *dev);
199 static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
200 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 int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
220 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
221 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
222 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
223
224 /* Probing */
225 static int __init smsc_ircc_look_for_chips(void);
226 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
227 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
228 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
229 static int __init smsc_superio_fdc(unsigned short cfg_base);
230 static int __init smsc_superio_lpc(unsigned short cfg_base);
231 #ifdef CONFIG_PCI
232 static int __init preconfigure_smsc_chip(struct smsc_ircc_subsystem_configuration *conf);
233 static int __init preconfigure_through_82801(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
234 static void __init preconfigure_ali_port(struct pci_dev *dev,
235 unsigned short port);
236 static int __init preconfigure_through_ali(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
237 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
238 unsigned short ircc_fir,
239 unsigned short ircc_sir,
240 unsigned char ircc_dma,
241 unsigned char ircc_irq);
242 #endif
243
244 /* Transceivers specific functions */
245
246 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
247 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
248 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
249 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
250 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
251 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
252
253 /* Power Management */
254
255 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
256 static int smsc_ircc_resume(struct platform_device *dev);
257
258 static struct platform_driver smsc_ircc_driver = {
259 .suspend = smsc_ircc_suspend,
260 .resume = smsc_ircc_resume,
261 .driver = {
262 .name = SMSC_IRCC2_DRIVER_NAME,
263 },
264 };
265
266 /* Transceivers for SMSC-ircc */
267
268 static struct smsc_transceiver smsc_transceivers[] =
269 {
270 { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
271 { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
272 { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
273 { NULL, NULL }
274 };
275 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
276
277 /* SMC SuperIO chipsets definitions */
278
279 #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
280 #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
281 #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
282 #define SIR 0 /* SuperIO Chip has only slow IRDA */
283 #define FIR 4 /* SuperIO Chip has fast IRDA */
284 #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
285
286 static struct smsc_chip __initdata fdc_chips_flat[] =
287 {
288 /* Base address 0x3f0 or 0x370 */
289 { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
290 { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
291 { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
292 { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
293 { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
294 { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
295 { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
296 { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
297 { NULL }
298 };
299
300 static struct smsc_chip __initdata fdc_chips_paged[] =
301 {
302 /* Base address 0x3f0 or 0x370 */
303 { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
304 { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
305 { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
306 { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
307 { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
308 { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
309 { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
310 { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
311 { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
312 { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
313 { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
314 { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
315 { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
316 { NULL }
317 };
318
319 static struct smsc_chip __initdata lpc_chips_flat[] =
320 {
321 /* Base address 0x2E or 0x4E */
322 { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
323 { "47N227", KEY55_1|FIR|SERx4, 0x7a, 0x00 },
324 { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
325 { NULL }
326 };
327
328 static struct smsc_chip __initdata lpc_chips_paged[] =
329 {
330 /* Base address 0x2E or 0x4E */
331 { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
332 { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
333 { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
334 { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
335 { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
336 { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
337 { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
338 { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
339 { NULL }
340 };
341
342 #define SMSCSIO_TYPE_FDC 1
343 #define SMSCSIO_TYPE_LPC 2
344 #define SMSCSIO_TYPE_FLAT 4
345 #define SMSCSIO_TYPE_PAGED 8
346
347 static struct smsc_chip_address __initdata possible_addresses[] =
348 {
349 { 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
350 { 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
351 { 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
352 { 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
353 { 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
354 { 0, 0 }
355 };
356
357 /* Globals */
358
359 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
360 static unsigned short dev_count;
361
362 static inline void register_bank(int iobase, int bank)
363 {
364 outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
365 iobase + IRCC_MASTER);
366 }
367
368 /* PNP hotplug support */
369 static const struct pnp_device_id smsc_ircc_pnp_table[] = {
370 { .id = "SMCf010", .driver_data = 0 },
371 /* and presumably others */
372 { }
373 };
374 MODULE_DEVICE_TABLE(pnp, smsc_ircc_pnp_table);
375
376 static int pnp_driver_registered;
377
378 #ifdef CONFIG_PNP
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 #else /* CONFIG_PNP */
406 static struct pnp_driver smsc_ircc_pnp_driver;
407 #endif
408
409 /*******************************************************************************
410 *
411 *
412 * SMSC-ircc stuff
413 *
414 *
415 *******************************************************************************/
416
417 static int __init smsc_ircc_legacy_probe(void)
418 {
419 int ret = 0;
420
421 #ifdef CONFIG_PCI
422 if (smsc_ircc_preconfigure_subsystems(ircc_cfg, ircc_fir, ircc_sir, ircc_dma, ircc_irq) < 0) {
423 /* Ignore errors from preconfiguration */
424 IRDA_ERROR("%s, Preconfiguration failed !\n", driver_name);
425 }
426 #endif
427
428 if (ircc_fir > 0 && ircc_sir > 0) {
429 IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
430 IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
431
432 if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq))
433 ret = -ENODEV;
434 } else {
435 ret = -ENODEV;
436
437 /* try user provided configuration register base address */
438 if (ircc_cfg > 0) {
439 IRDA_MESSAGE(" Overriding configuration address "
440 "0x%04x\n", ircc_cfg);
441 if (!smsc_superio_fdc(ircc_cfg))
442 ret = 0;
443 if (!smsc_superio_lpc(ircc_cfg))
444 ret = 0;
445 }
446
447 if (smsc_ircc_look_for_chips() > 0)
448 ret = 0;
449 }
450 return ret;
451 }
452
453 /*
454 * Function smsc_ircc_init ()
455 *
456 * Initialize chip. Just try to find out how many chips we are dealing with
457 * and where they are
458 */
459 static int __init smsc_ircc_init(void)
460 {
461 int ret;
462
463 IRDA_DEBUG(1, "%s\n", __func__);
464
465 ret = platform_driver_register(&smsc_ircc_driver);
466 if (ret) {
467 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
468 return ret;
469 }
470
471 dev_count = 0;
472
473 if (smsc_nopnp || !pnp_platform_devices ||
474 ircc_cfg || ircc_fir || ircc_sir ||
475 ircc_dma != DMA_INVAL || ircc_irq != IRQ_INVAL) {
476 ret = smsc_ircc_legacy_probe();
477 } else {
478 if (pnp_register_driver(&smsc_ircc_pnp_driver) == 0)
479 pnp_driver_registered = 1;
480 }
481
482 if (ret) {
483 if (pnp_driver_registered)
484 pnp_unregister_driver(&smsc_ircc_pnp_driver);
485 platform_driver_unregister(&smsc_ircc_driver);
486 }
487
488 return ret;
489 }
490
491 static netdev_tx_t smsc_ircc_net_xmit(struct sk_buff *skb,
492 struct net_device *dev)
493 {
494 struct smsc_ircc_cb *self = netdev_priv(dev);
495
496 if (self->io.speed > 115200)
497 return smsc_ircc_hard_xmit_fir(skb, dev);
498 else
499 return smsc_ircc_hard_xmit_sir(skb, dev);
500 }
501
502 static const struct net_device_ops smsc_ircc_netdev_ops = {
503 .ndo_open = smsc_ircc_net_open,
504 .ndo_stop = smsc_ircc_net_close,
505 .ndo_do_ioctl = smsc_ircc_net_ioctl,
506 .ndo_start_xmit = smsc_ircc_net_xmit,
507 #if SMSC_IRCC2_C_NET_TIMEOUT
508 .ndo_tx_timeout = smsc_ircc_timeout,
509 #endif
510 };
511
512 /*
513 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
514 *
515 * Try to open driver instance
516 *
517 */
518 static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
519 {
520 struct smsc_ircc_cb *self;
521 struct net_device *dev;
522 int err;
523
524 IRDA_DEBUG(1, "%s\n", __func__);
525
526 err = smsc_ircc_present(fir_base, sir_base);
527 if (err)
528 goto err_out;
529
530 err = -ENOMEM;
531 if (dev_count >= ARRAY_SIZE(dev_self)) {
532 IRDA_WARNING("%s(), too many devices!\n", __func__);
533 goto err_out1;
534 }
535
536 /*
537 * Allocate new instance of the driver
538 */
539 dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
540 if (!dev) {
541 IRDA_WARNING("%s() can't allocate net device\n", __func__);
542 goto err_out1;
543 }
544
545 #if SMSC_IRCC2_C_NET_TIMEOUT
546 dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
547 #endif
548 dev->netdev_ops = &smsc_ircc_netdev_ops;
549
550 self = netdev_priv(dev);
551 self->netdev = dev;
552
553 /* Make ifconfig display some details */
554 dev->base_addr = self->io.fir_base = fir_base;
555 dev->irq = self->io.irq = irq;
556
557 /* Need to store self somewhere */
558 dev_self[dev_count] = self;
559 spin_lock_init(&self->lock);
560
561 self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
562 self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
563
564 self->rx_buff.head =
565 dma_alloc_coherent(NULL, self->rx_buff.truesize,
566 &self->rx_buff_dma, GFP_KERNEL);
567 if (self->rx_buff.head == NULL) {
568 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
569 driver_name);
570 goto err_out2;
571 }
572
573 self->tx_buff.head =
574 dma_alloc_coherent(NULL, self->tx_buff.truesize,
575 &self->tx_buff_dma, GFP_KERNEL);
576 if (self->tx_buff.head == NULL) {
577 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
578 driver_name);
579 goto err_out3;
580 }
581
582 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
583 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
584
585 self->rx_buff.in_frame = FALSE;
586 self->rx_buff.state = OUTSIDE_FRAME;
587 self->tx_buff.data = self->tx_buff.head;
588 self->rx_buff.data = self->rx_buff.head;
589
590 smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
591 smsc_ircc_setup_qos(self);
592 smsc_ircc_init_chip(self);
593
594 if (ircc_transceiver > 0 &&
595 ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
596 self->transceiver = ircc_transceiver;
597 else
598 smsc_ircc_probe_transceiver(self);
599
600 err = register_netdev(self->netdev);
601 if (err) {
602 IRDA_ERROR("%s, Network device registration failed!\n",
603 driver_name);
604 goto err_out4;
605 }
606
607 self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
608 dev_count, NULL, 0);
609 if (IS_ERR(self->pldev)) {
610 err = PTR_ERR(self->pldev);
611 goto err_out5;
612 }
613 platform_set_drvdata(self->pldev, self);
614
615 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
616 dev_count++;
617
618 return 0;
619
620 err_out5:
621 unregister_netdev(self->netdev);
622
623 err_out4:
624 dma_free_coherent(NULL, self->tx_buff.truesize,
625 self->tx_buff.head, self->tx_buff_dma);
626 err_out3:
627 dma_free_coherent(NULL, self->rx_buff.truesize,
628 self->rx_buff.head, self->rx_buff_dma);
629 err_out2:
630 free_netdev(self->netdev);
631 dev_self[dev_count] = NULL;
632 err_out1:
633 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
634 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
635 err_out:
636 return err;
637 }
638
639 /*
640 * Function smsc_ircc_present(fir_base, sir_base)
641 *
642 * Check the smsc-ircc chip presence
643 *
644 */
645 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
646 {
647 unsigned char low, high, chip, config, dma, irq, version;
648
649 if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
650 driver_name)) {
651 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
652 __func__, fir_base);
653 goto out1;
654 }
655
656 if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
657 driver_name)) {
658 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
659 __func__, sir_base);
660 goto out2;
661 }
662
663 register_bank(fir_base, 3);
664
665 high = inb(fir_base + IRCC_ID_HIGH);
666 low = inb(fir_base + IRCC_ID_LOW);
667 chip = inb(fir_base + IRCC_CHIP_ID);
668 version = inb(fir_base + IRCC_VERSION);
669 config = inb(fir_base + IRCC_INTERFACE);
670 dma = config & IRCC_INTERFACE_DMA_MASK;
671 irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
672
673 if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
674 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
675 __func__, fir_base);
676 goto out3;
677 }
678 IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
679 "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
680 chip & 0x0f, version, fir_base, sir_base, dma, irq);
681
682 return 0;
683
684 out3:
685 release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
686 out2:
687 release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
688 out1:
689 return -ENODEV;
690 }
691
692 /*
693 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
694 *
695 * Setup I/O
696 *
697 */
698 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
699 unsigned int fir_base, unsigned int sir_base,
700 u8 dma, u8 irq)
701 {
702 unsigned char config, chip_dma, chip_irq;
703
704 register_bank(fir_base, 3);
705 config = inb(fir_base + IRCC_INTERFACE);
706 chip_dma = config & IRCC_INTERFACE_DMA_MASK;
707 chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
708
709 self->io.fir_base = fir_base;
710 self->io.sir_base = sir_base;
711 self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
712 self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
713 self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
714 self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
715
716 if (irq != IRQ_INVAL) {
717 if (irq != chip_irq)
718 IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
719 driver_name, chip_irq, irq);
720 self->io.irq = irq;
721 } else
722 self->io.irq = chip_irq;
723
724 if (dma != DMA_INVAL) {
725 if (dma != chip_dma)
726 IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
727 driver_name, chip_dma, dma);
728 self->io.dma = dma;
729 } else
730 self->io.dma = chip_dma;
731
732 }
733
734 /*
735 * Function smsc_ircc_setup_qos(self)
736 *
737 * Setup qos
738 *
739 */
740 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
741 {
742 /* Initialize QoS for this device */
743 irda_init_max_qos_capabilies(&self->qos);
744
745 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
746 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
747
748 self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
749 self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
750 irda_qos_bits_to_value(&self->qos);
751 }
752
753 /*
754 * Function smsc_ircc_init_chip(self)
755 *
756 * Init chip
757 *
758 */
759 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
760 {
761 int iobase = self->io.fir_base;
762
763 register_bank(iobase, 0);
764 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
765 outb(0x00, iobase + IRCC_MASTER);
766
767 register_bank(iobase, 1);
768 outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
769 iobase + IRCC_SCE_CFGA);
770
771 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
772 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
773 iobase + IRCC_SCE_CFGB);
774 #else
775 outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
776 iobase + IRCC_SCE_CFGB);
777 #endif
778 (void) inb(iobase + IRCC_FIFO_THRESHOLD);
779 outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
780
781 register_bank(iobase, 4);
782 outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
783
784 register_bank(iobase, 0);
785 outb(0, iobase + IRCC_LCR_A);
786
787 smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
788
789 /* Power on device */
790 outb(0x00, iobase + IRCC_MASTER);
791 }
792
793 /*
794 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
795 *
796 * Process IOCTL commands for this device
797 *
798 */
799 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
800 {
801 struct if_irda_req *irq = (struct if_irda_req *) rq;
802 struct smsc_ircc_cb *self;
803 unsigned long flags;
804 int ret = 0;
805
806 IRDA_ASSERT(dev != NULL, return -1;);
807
808 self = netdev_priv(dev);
809
810 IRDA_ASSERT(self != NULL, return -1;);
811
812 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
813
814 switch (cmd) {
815 case SIOCSBANDWIDTH: /* Set bandwidth */
816 if (!capable(CAP_NET_ADMIN))
817 ret = -EPERM;
818 else {
819 /* Make sure we are the only one touching
820 * self->io.speed and the hardware - Jean II */
821 spin_lock_irqsave(&self->lock, flags);
822 smsc_ircc_change_speed(self, irq->ifr_baudrate);
823 spin_unlock_irqrestore(&self->lock, flags);
824 }
825 break;
826 case SIOCSMEDIABUSY: /* Set media busy */
827 if (!capable(CAP_NET_ADMIN)) {
828 ret = -EPERM;
829 break;
830 }
831
832 irda_device_set_media_busy(self->netdev, TRUE);
833 break;
834 case SIOCGRECEIVING: /* Check if we are receiving right now */
835 irq->ifr_receiving = smsc_ircc_is_receiving(self);
836 break;
837 #if 0
838 case SIOCSDTRRTS:
839 if (!capable(CAP_NET_ADMIN)) {
840 ret = -EPERM;
841 break;
842 }
843 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
844 break;
845 #endif
846 default:
847 ret = -EOPNOTSUPP;
848 }
849
850 return ret;
851 }
852
853 #if SMSC_IRCC2_C_NET_TIMEOUT
854 /*
855 * Function smsc_ircc_timeout (struct net_device *dev)
856 *
857 * The networking timeout management.
858 *
859 */
860
861 static void smsc_ircc_timeout(struct net_device *dev)
862 {
863 struct smsc_ircc_cb *self = netdev_priv(dev);
864 unsigned long flags;
865
866 IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
867 dev->name, self->io.speed);
868 spin_lock_irqsave(&self->lock, flags);
869 smsc_ircc_sir_start(self);
870 smsc_ircc_change_speed(self, self->io.speed);
871 dev->trans_start = jiffies;
872 netif_wake_queue(dev);
873 spin_unlock_irqrestore(&self->lock, flags);
874 }
875 #endif
876
877 /*
878 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
879 *
880 * Transmits the current frame until FIFO is full, then
881 * waits until the next transmit interrupt, and continues until the
882 * frame is transmitted.
883 */
884 static netdev_tx_t smsc_ircc_hard_xmit_sir(struct sk_buff *skb,
885 struct net_device *dev)
886 {
887 struct smsc_ircc_cb *self;
888 unsigned long flags;
889 s32 speed;
890
891 IRDA_DEBUG(1, "%s\n", __func__);
892
893 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
894
895 self = netdev_priv(dev);
896 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
897
898 netif_stop_queue(dev);
899
900 /* Make sure test of self->io.speed & speed change are atomic */
901 spin_lock_irqsave(&self->lock, flags);
902
903 /* Check if we need to change the speed */
904 speed = irda_get_next_speed(skb);
905 if (speed != self->io.speed && speed != -1) {
906 /* Check for empty frame */
907 if (!skb->len) {
908 /*
909 * We send frames one by one in SIR mode (no
910 * pipelining), so at this point, if we were sending
911 * a previous frame, we just received the interrupt
912 * telling us it is finished (UART_IIR_THRI).
913 * Therefore, waiting for the transmitter to really
914 * finish draining the fifo won't take too long.
915 * And the interrupt handler is not expected to run.
916 * - Jean II */
917 smsc_ircc_sir_wait_hw_transmitter_finish(self);
918 smsc_ircc_change_speed(self, speed);
919 spin_unlock_irqrestore(&self->lock, flags);
920 dev_kfree_skb(skb);
921 return NETDEV_TX_OK;
922 }
923 self->new_speed = speed;
924 }
925
926 /* Init tx buffer */
927 self->tx_buff.data = self->tx_buff.head;
928
929 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
930 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
931 self->tx_buff.truesize);
932
933 dev->stats.tx_bytes += self->tx_buff.len;
934
935 /* Turn on transmit finished interrupt. Will fire immediately! */
936 outb(UART_IER_THRI, self->io.sir_base + UART_IER);
937
938 spin_unlock_irqrestore(&self->lock, flags);
939
940 dev_kfree_skb(skb);
941
942 return NETDEV_TX_OK;
943 }
944
945 /*
946 * Function smsc_ircc_set_fir_speed (self, baud)
947 *
948 * Change the speed of the device
949 *
950 */
951 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
952 {
953 int fir_base, ir_mode, ctrl, fast;
954
955 IRDA_ASSERT(self != NULL, return;);
956 fir_base = self->io.fir_base;
957
958 self->io.speed = speed;
959
960 switch (speed) {
961 default:
962 case 576000:
963 ir_mode = IRCC_CFGA_IRDA_HDLC;
964 ctrl = IRCC_CRC;
965 fast = 0;
966 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
967 break;
968 case 1152000:
969 ir_mode = IRCC_CFGA_IRDA_HDLC;
970 ctrl = IRCC_1152 | IRCC_CRC;
971 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
972 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
973 __func__);
974 break;
975 case 4000000:
976 ir_mode = IRCC_CFGA_IRDA_4PPM;
977 ctrl = IRCC_CRC;
978 fast = IRCC_LCR_A_FAST;
979 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
980 __func__);
981 break;
982 }
983 #if 0
984 Now in tranceiver!
985 /* This causes an interrupt */
986 register_bank(fir_base, 0);
987 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
988 #endif
989
990 register_bank(fir_base, 1);
991 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
992
993 register_bank(fir_base, 4);
994 outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
995 }
996
997 /*
998 * Function smsc_ircc_fir_start(self)
999 *
1000 * Change the speed of the device
1001 *
1002 */
1003 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
1004 {
1005 struct net_device *dev;
1006 int fir_base;
1007
1008 IRDA_DEBUG(1, "%s\n", __func__);
1009
1010 IRDA_ASSERT(self != NULL, return;);
1011 dev = self->netdev;
1012 IRDA_ASSERT(dev != NULL, return;);
1013
1014 fir_base = self->io.fir_base;
1015
1016 /* Reset everything */
1017
1018 /* Clear FIFO */
1019 outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
1020
1021 /* Enable interrupt */
1022 /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
1023
1024 register_bank(fir_base, 1);
1025
1026 /* Select the TX/RX interface */
1027 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
1028 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
1029 fir_base + IRCC_SCE_CFGB);
1030 #else
1031 outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
1032 fir_base + IRCC_SCE_CFGB);
1033 #endif
1034 (void) inb(fir_base + IRCC_FIFO_THRESHOLD);
1035
1036 /* Enable SCE interrupts */
1037 outb(0, fir_base + IRCC_MASTER);
1038 register_bank(fir_base, 0);
1039 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
1040 outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
1041 }
1042
1043 /*
1044 * Function smsc_ircc_fir_stop(self, baud)
1045 *
1046 * Change the speed of the device
1047 *
1048 */
1049 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
1050 {
1051 int fir_base;
1052
1053 IRDA_DEBUG(1, "%s\n", __func__);
1054
1055 IRDA_ASSERT(self != NULL, return;);
1056
1057 fir_base = self->io.fir_base;
1058 register_bank(fir_base, 0);
1059 /*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
1060 outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
1061 }
1062
1063
1064 /*
1065 * Function smsc_ircc_change_speed(self, baud)
1066 *
1067 * Change the speed of the device
1068 *
1069 * This function *must* be called with spinlock held, because it may
1070 * be called from the irq handler. - Jean II
1071 */
1072 static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed)
1073 {
1074 struct net_device *dev;
1075 int last_speed_was_sir;
1076
1077 IRDA_DEBUG(0, "%s() changing speed to: %d\n", __func__, speed);
1078
1079 IRDA_ASSERT(self != NULL, return;);
1080 dev = self->netdev;
1081
1082 last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
1083
1084 #if 0
1085 /* Temp Hack */
1086 speed= 1152000;
1087 self->io.speed = speed;
1088 last_speed_was_sir = 0;
1089 smsc_ircc_fir_start(self);
1090 #endif
1091
1092 if (self->io.speed == 0)
1093 smsc_ircc_sir_start(self);
1094
1095 #if 0
1096 if (!last_speed_was_sir) speed = self->io.speed;
1097 #endif
1098
1099 if (self->io.speed != speed)
1100 smsc_ircc_set_transceiver_for_speed(self, speed);
1101
1102 self->io.speed = speed;
1103
1104 if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1105 if (!last_speed_was_sir) {
1106 smsc_ircc_fir_stop(self);
1107 smsc_ircc_sir_start(self);
1108 }
1109 smsc_ircc_set_sir_speed(self, speed);
1110 } else {
1111 if (last_speed_was_sir) {
1112 #if SMSC_IRCC2_C_SIR_STOP
1113 smsc_ircc_sir_stop(self);
1114 #endif
1115 smsc_ircc_fir_start(self);
1116 }
1117 smsc_ircc_set_fir_speed(self, speed);
1118
1119 #if 0
1120 self->tx_buff.len = 10;
1121 self->tx_buff.data = self->tx_buff.head;
1122
1123 smsc_ircc_dma_xmit(self, 4000);
1124 #endif
1125 /* Be ready for incoming frames */
1126 smsc_ircc_dma_receive(self);
1127 }
1128
1129 netif_wake_queue(dev);
1130 }
1131
1132 /*
1133 * Function smsc_ircc_set_sir_speed (self, speed)
1134 *
1135 * Set speed of IrDA port to specified baudrate
1136 *
1137 */
1138 static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
1139 {
1140 int iobase;
1141 int fcr; /* FIFO control reg */
1142 int lcr; /* Line control reg */
1143 int divisor;
1144
1145 IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __func__, speed);
1146
1147 IRDA_ASSERT(self != NULL, return;);
1148 iobase = self->io.sir_base;
1149
1150 /* Update accounting for new speed */
1151 self->io.speed = speed;
1152
1153 /* Turn off interrupts */
1154 outb(0, iobase + UART_IER);
1155
1156 divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
1157
1158 fcr = UART_FCR_ENABLE_FIFO;
1159
1160 /*
1161 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1162 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1163 * about this timeout since it will always be fast enough.
1164 */
1165 fcr |= self->io.speed < 38400 ?
1166 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
1167
1168 /* IrDA ports use 8N1 */
1169 lcr = UART_LCR_WLEN8;
1170
1171 outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
1172 outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
1173 outb(divisor >> 8, iobase + UART_DLM);
1174 outb(lcr, iobase + UART_LCR); /* Set 8N1 */
1175 outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
1176
1177 /* Turn on interrups */
1178 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
1179
1180 IRDA_DEBUG(2, "%s() speed changed to: %d\n", __func__, speed);
1181 }
1182
1183
1184 /*
1185 * Function smsc_ircc_hard_xmit_fir (skb, dev)
1186 *
1187 * Transmit the frame!
1188 *
1189 */
1190 static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
1191 struct net_device *dev)
1192 {
1193 struct smsc_ircc_cb *self;
1194 unsigned long flags;
1195 s32 speed;
1196 int mtt;
1197
1198 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1199 self = netdev_priv(dev);
1200 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1201
1202 netif_stop_queue(dev);
1203
1204 /* Make sure test of self->io.speed & speed change are atomic */
1205 spin_lock_irqsave(&self->lock, flags);
1206
1207 /* Check if we need to change the speed after this frame */
1208 speed = irda_get_next_speed(skb);
1209 if (speed != self->io.speed && speed != -1) {
1210 /* Check for empty frame */
1211 if (!skb->len) {
1212 /* Note : you should make sure that speed changes
1213 * are not going to corrupt any outgoing frame.
1214 * Look at nsc-ircc for the gory details - Jean II */
1215 smsc_ircc_change_speed(self, speed);
1216 spin_unlock_irqrestore(&self->lock, flags);
1217 dev_kfree_skb(skb);
1218 return NETDEV_TX_OK;
1219 }
1220
1221 self->new_speed = speed;
1222 }
1223
1224 skb_copy_from_linear_data(skb, self->tx_buff.head, skb->len);
1225
1226 self->tx_buff.len = skb->len;
1227 self->tx_buff.data = self->tx_buff.head;
1228
1229 mtt = irda_get_mtt(skb);
1230 if (mtt) {
1231 int bofs;
1232
1233 /*
1234 * Compute how many BOFs (STA or PA's) we need to waste the
1235 * min turn time given the speed of the link.
1236 */
1237 bofs = mtt * (self->io.speed / 1000) / 8000;
1238 if (bofs > 4095)
1239 bofs = 4095;
1240
1241 smsc_ircc_dma_xmit(self, bofs);
1242 } else {
1243 /* Transmit frame */
1244 smsc_ircc_dma_xmit(self, 0);
1245 }
1246
1247 spin_unlock_irqrestore(&self->lock, flags);
1248 dev_kfree_skb(skb);
1249
1250 return NETDEV_TX_OK;
1251 }
1252
1253 /*
1254 * Function smsc_ircc_dma_xmit (self, bofs)
1255 *
1256 * Transmit data using DMA
1257 *
1258 */
1259 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
1260 {
1261 int iobase = self->io.fir_base;
1262 u8 ctrl;
1263
1264 IRDA_DEBUG(3, "%s\n", __func__);
1265 #if 1
1266 /* Disable Rx */
1267 register_bank(iobase, 0);
1268 outb(0x00, iobase + IRCC_LCR_B);
1269 #endif
1270 register_bank(iobase, 1);
1271 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1272 iobase + IRCC_SCE_CFGB);
1273
1274 self->io.direction = IO_XMIT;
1275
1276 /* Set BOF additional count for generating the min turn time */
1277 register_bank(iobase, 4);
1278 outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
1279 ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
1280 outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
1281
1282 /* Set max Tx frame size */
1283 outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
1284 outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
1285
1286 /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1287
1288 /* Enable burst mode chip Tx DMA */
1289 register_bank(iobase, 1);
1290 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1291 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1292
1293 /* Setup DMA controller (must be done after enabling chip DMA) */
1294 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1295 DMA_TX_MODE);
1296
1297 /* Enable interrupt */
1298
1299 register_bank(iobase, 0);
1300 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1301 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1302
1303 /* Enable transmit */
1304 outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
1305 }
1306
1307 /*
1308 * Function smsc_ircc_dma_xmit_complete (self)
1309 *
1310 * The transfer of a frame in finished. This function will only be called
1311 * by the interrupt handler
1312 *
1313 */
1314 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
1315 {
1316 int iobase = self->io.fir_base;
1317
1318 IRDA_DEBUG(3, "%s\n", __func__);
1319 #if 0
1320 /* Disable Tx */
1321 register_bank(iobase, 0);
1322 outb(0x00, iobase + IRCC_LCR_B);
1323 #endif
1324 register_bank(iobase, 1);
1325 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1326 iobase + IRCC_SCE_CFGB);
1327
1328 /* Check for underrun! */
1329 register_bank(iobase, 0);
1330 if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1331 self->netdev->stats.tx_errors++;
1332 self->netdev->stats.tx_fifo_errors++;
1333
1334 /* Reset error condition */
1335 register_bank(iobase, 0);
1336 outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
1337 outb(0x00, iobase + IRCC_MASTER);
1338 } else {
1339 self->netdev->stats.tx_packets++;
1340 self->netdev->stats.tx_bytes += self->tx_buff.len;
1341 }
1342
1343 /* Check if it's time to change the speed */
1344 if (self->new_speed) {
1345 smsc_ircc_change_speed(self, self->new_speed);
1346 self->new_speed = 0;
1347 }
1348
1349 netif_wake_queue(self->netdev);
1350 }
1351
1352 /*
1353 * Function smsc_ircc_dma_receive(self)
1354 *
1355 * Get ready for receiving a frame. The device will initiate a DMA
1356 * if it starts to receive a frame.
1357 *
1358 */
1359 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
1360 {
1361 int iobase = self->io.fir_base;
1362 #if 0
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 #endif
1368
1369 /* Disable Tx */
1370 register_bank(iobase, 0);
1371 outb(0x00, iobase + IRCC_LCR_B);
1372
1373 /* Turn off chip DMA */
1374 register_bank(iobase, 1);
1375 outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1376 iobase + IRCC_SCE_CFGB);
1377
1378 self->io.direction = IO_RECV;
1379 self->rx_buff.data = self->rx_buff.head;
1380
1381 /* Set max Rx frame size */
1382 register_bank(iobase, 4);
1383 outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
1384 outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
1385
1386 /* Setup DMA controller */
1387 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1388 DMA_RX_MODE);
1389
1390 /* Enable burst mode chip Rx DMA */
1391 register_bank(iobase, 1);
1392 outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1393 IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
1394
1395 /* Enable interrupt */
1396 register_bank(iobase, 0);
1397 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1398 outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
1399
1400 /* Enable receiver */
1401 register_bank(iobase, 0);
1402 outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1403 iobase + IRCC_LCR_B);
1404
1405 return 0;
1406 }
1407
1408 /*
1409 * Function smsc_ircc_dma_receive_complete(self)
1410 *
1411 * Finished with receiving frames
1412 *
1413 */
1414 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
1415 {
1416 struct sk_buff *skb;
1417 int len, msgcnt, lsr;
1418 int iobase = self->io.fir_base;
1419
1420 register_bank(iobase, 0);
1421
1422 IRDA_DEBUG(3, "%s\n", __func__);
1423 #if 0
1424 /* Disable Rx */
1425 register_bank(iobase, 0);
1426 outb(0x00, iobase + IRCC_LCR_B);
1427 #endif
1428 register_bank(iobase, 0);
1429 outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
1430 lsr= inb(iobase + IRCC_LSR);
1431 msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
1432
1433 IRDA_DEBUG(2, "%s: dma count = %d\n", __func__,
1434 get_dma_residue(self->io.dma));
1435
1436 len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1437
1438 /* Look for errors */
1439 if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1440 self->netdev->stats.rx_errors++;
1441 if (lsr & IRCC_LSR_FRAME_ERROR)
1442 self->netdev->stats.rx_frame_errors++;
1443 if (lsr & IRCC_LSR_CRC_ERROR)
1444 self->netdev->stats.rx_crc_errors++;
1445 if (lsr & IRCC_LSR_SIZE_ERROR)
1446 self->netdev->stats.rx_length_errors++;
1447 if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
1448 self->netdev->stats.rx_length_errors++;
1449 return;
1450 }
1451
1452 /* Remove CRC */
1453 len -= self->io.speed < 4000000 ? 2 : 4;
1454
1455 if (len < 2 || len > 2050) {
1456 IRDA_WARNING("%s(), bogus len=%d\n", __func__, len);
1457 return;
1458 }
1459 IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __func__, msgcnt, len);
1460
1461 skb = dev_alloc_skb(len + 1);
1462 if (!skb) {
1463 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1464 __func__);
1465 return;
1466 }
1467 /* Make sure IP header gets aligned */
1468 skb_reserve(skb, 1);
1469
1470 memcpy(skb_put(skb, len), self->rx_buff.data, len);
1471 self->netdev->stats.rx_packets++;
1472 self->netdev->stats.rx_bytes += len;
1473
1474 skb->dev = self->netdev;
1475 skb_reset_mac_header(skb);
1476 skb->protocol = htons(ETH_P_IRDA);
1477 netif_rx(skb);
1478 }
1479
1480 /*
1481 * Function smsc_ircc_sir_receive (self)
1482 *
1483 * Receive one frame from the infrared port
1484 *
1485 */
1486 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1487 {
1488 int boguscount = 0;
1489 int iobase;
1490
1491 IRDA_ASSERT(self != NULL, return;);
1492
1493 iobase = self->io.sir_base;
1494
1495 /*
1496 * Receive all characters in Rx FIFO, unwrap and unstuff them.
1497 * async_unwrap_char will deliver all found frames
1498 */
1499 do {
1500 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
1501 inb(iobase + UART_RX));
1502
1503 /* Make sure we don't stay here to long */
1504 if (boguscount++ > 32) {
1505 IRDA_DEBUG(2, "%s(), breaking!\n", __func__);
1506 break;
1507 }
1508 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
1509 }
1510
1511
1512 /*
1513 * Function smsc_ircc_interrupt (irq, dev_id, regs)
1514 *
1515 * An interrupt from the chip has arrived. Time to do some work
1516 *
1517 */
1518 static irqreturn_t smsc_ircc_interrupt(int dummy, void *dev_id)
1519 {
1520 struct net_device *dev = dev_id;
1521 struct smsc_ircc_cb *self = netdev_priv(dev);
1522 int iobase, iir, lcra, lsr;
1523 irqreturn_t ret = IRQ_NONE;
1524
1525 /* Serialise the interrupt handler in various CPUs, stop Tx path */
1526 spin_lock(&self->lock);
1527
1528 /* Check if we should use the SIR interrupt handler */
1529 if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
1530 ret = smsc_ircc_interrupt_sir(dev);
1531 goto irq_ret_unlock;
1532 }
1533
1534 iobase = self->io.fir_base;
1535
1536 register_bank(iobase, 0);
1537 iir = inb(iobase + IRCC_IIR);
1538 if (iir == 0)
1539 goto irq_ret_unlock;
1540 ret = IRQ_HANDLED;
1541
1542 /* Disable interrupts */
1543 outb(0, iobase + IRCC_IER);
1544 lcra = inb(iobase + IRCC_LCR_A);
1545 lsr = inb(iobase + IRCC_LSR);
1546
1547 IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __func__, iir);
1548
1549 if (iir & IRCC_IIR_EOM) {
1550 if (self->io.direction == IO_RECV)
1551 smsc_ircc_dma_receive_complete(self);
1552 else
1553 smsc_ircc_dma_xmit_complete(self);
1554
1555 smsc_ircc_dma_receive(self);
1556 }
1557
1558 if (iir & IRCC_IIR_ACTIVE_FRAME) {
1559 /*printk(KERN_WARNING "%s(): Active Frame\n", __func__);*/
1560 }
1561
1562 /* Enable interrupts again */
1563
1564 register_bank(iobase, 0);
1565 outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
1566
1567 irq_ret_unlock:
1568 spin_unlock(&self->lock);
1569
1570 return ret;
1571 }
1572
1573 /*
1574 * Function irport_interrupt_sir (irq, dev_id)
1575 *
1576 * Interrupt handler for SIR modes
1577 */
1578 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1579 {
1580 struct smsc_ircc_cb *self = netdev_priv(dev);
1581 int boguscount = 0;
1582 int iobase;
1583 int iir, lsr;
1584
1585 /* Already locked comming here in smsc_ircc_interrupt() */
1586 /*spin_lock(&self->lock);*/
1587
1588 iobase = self->io.sir_base;
1589
1590 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1591 if (iir == 0)
1592 return IRQ_NONE;
1593 while (iir) {
1594 /* Clear interrupt */
1595 lsr = inb(iobase + UART_LSR);
1596
1597 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1598 __func__, iir, lsr, iobase);
1599
1600 switch (iir) {
1601 case UART_IIR_RLSI:
1602 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
1603 break;
1604 case UART_IIR_RDI:
1605 /* Receive interrupt */
1606 smsc_ircc_sir_receive(self);
1607 break;
1608 case UART_IIR_THRI:
1609 if (lsr & UART_LSR_THRE)
1610 /* Transmitter ready for data */
1611 smsc_ircc_sir_write_wakeup(self);
1612 break;
1613 default:
1614 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1615 __func__, iir);
1616 break;
1617 }
1618
1619 /* Make sure we don't stay here to long */
1620 if (boguscount++ > 100)
1621 break;
1622
1623 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1624 }
1625 /*spin_unlock(&self->lock);*/
1626 return IRQ_HANDLED;
1627 }
1628
1629
1630 #if 0 /* unused */
1631 /*
1632 * Function ircc_is_receiving (self)
1633 *
1634 * Return TRUE is we are currently receiving a frame
1635 *
1636 */
1637 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1638 {
1639 int status = FALSE;
1640 /* int iobase; */
1641
1642 IRDA_DEBUG(1, "%s\n", __func__);
1643
1644 IRDA_ASSERT(self != NULL, return FALSE;);
1645
1646 IRDA_DEBUG(0, "%s: dma count = %d\n", __func__,
1647 get_dma_residue(self->io.dma));
1648
1649 status = (self->rx_buff.state != OUTSIDE_FRAME);
1650
1651 return status;
1652 }
1653 #endif /* unused */
1654
1655 static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
1656 {
1657 int error;
1658
1659 error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
1660 self->netdev->name, self->netdev);
1661 if (error)
1662 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
1663 __func__, self->io.irq, error);
1664
1665 return error;
1666 }
1667
1668 static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
1669 {
1670 unsigned long flags;
1671
1672 spin_lock_irqsave(&self->lock, flags);
1673
1674 self->io.speed = 0;
1675 smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1676
1677 spin_unlock_irqrestore(&self->lock, flags);
1678 }
1679
1680 static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
1681 {
1682 int iobase = self->io.fir_base;
1683 unsigned long flags;
1684
1685 spin_lock_irqsave(&self->lock, flags);
1686
1687 register_bank(iobase, 0);
1688 outb(0, iobase + IRCC_IER);
1689 outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
1690 outb(0x00, iobase + IRCC_MASTER);
1691
1692 spin_unlock_irqrestore(&self->lock, flags);
1693 }
1694
1695
1696 /*
1697 * Function smsc_ircc_net_open (dev)
1698 *
1699 * Start the device
1700 *
1701 */
1702 static int smsc_ircc_net_open(struct net_device *dev)
1703 {
1704 struct smsc_ircc_cb *self;
1705 char hwname[16];
1706
1707 IRDA_DEBUG(1, "%s\n", __func__);
1708
1709 IRDA_ASSERT(dev != NULL, return -1;);
1710 self = netdev_priv(dev);
1711 IRDA_ASSERT(self != NULL, return 0;);
1712
1713 if (self->io.suspended) {
1714 IRDA_DEBUG(0, "%s(), device is suspended\n", __func__);
1715 return -EAGAIN;
1716 }
1717
1718 if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1719 (void *) dev)) {
1720 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1721 __func__, self->io.irq);
1722 return -EAGAIN;
1723 }
1724
1725 smsc_ircc_start_interrupts(self);
1726
1727 /* Give self a hardware name */
1728 /* It would be cool to offer the chip revision here - Jean II */
1729 sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1730
1731 /*
1732 * Open new IrLAP layer instance, now that everything should be
1733 * initialized properly
1734 */
1735 self->irlap = irlap_open(dev, &self->qos, hwname);
1736
1737 /*
1738 * Always allocate the DMA channel after the IRQ,
1739 * and clean up on failure.
1740 */
1741 if (request_dma(self->io.dma, dev->name)) {
1742 smsc_ircc_net_close(dev);
1743
1744 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1745 __func__, self->io.dma);
1746 return -EAGAIN;
1747 }
1748
1749 netif_start_queue(dev);
1750
1751 return 0;
1752 }
1753
1754 /*
1755 * Function smsc_ircc_net_close (dev)
1756 *
1757 * Stop the device
1758 *
1759 */
1760 static int smsc_ircc_net_close(struct net_device *dev)
1761 {
1762 struct smsc_ircc_cb *self;
1763
1764 IRDA_DEBUG(1, "%s\n", __func__);
1765
1766 IRDA_ASSERT(dev != NULL, return -1;);
1767 self = netdev_priv(dev);
1768 IRDA_ASSERT(self != NULL, return 0;);
1769
1770 /* Stop device */
1771 netif_stop_queue(dev);
1772
1773 /* Stop and remove instance of IrLAP */
1774 if (self->irlap)
1775 irlap_close(self->irlap);
1776 self->irlap = NULL;
1777
1778 smsc_ircc_stop_interrupts(self);
1779
1780 /* if we are called from smsc_ircc_resume we don't have IRQ reserved */
1781 if (!self->io.suspended)
1782 free_irq(self->io.irq, dev);
1783
1784 disable_dma(self->io.dma);
1785 free_dma(self->io.dma);
1786
1787 return 0;
1788 }
1789
1790 static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
1791 {
1792 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1793
1794 if (!self->io.suspended) {
1795 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
1796
1797 rtnl_lock();
1798 if (netif_running(self->netdev)) {
1799 netif_device_detach(self->netdev);
1800 smsc_ircc_stop_interrupts(self);
1801 free_irq(self->io.irq, self->netdev);
1802 disable_dma(self->io.dma);
1803 }
1804 self->io.suspended = 1;
1805 rtnl_unlock();
1806 }
1807
1808 return 0;
1809 }
1810
1811 static int smsc_ircc_resume(struct platform_device *dev)
1812 {
1813 struct smsc_ircc_cb *self = platform_get_drvdata(dev);
1814
1815 if (self->io.suspended) {
1816 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
1817
1818 rtnl_lock();
1819 smsc_ircc_init_chip(self);
1820 if (netif_running(self->netdev)) {
1821 if (smsc_ircc_request_irq(self)) {
1822 /*
1823 * Don't fail resume process, just kill this
1824 * network interface
1825 */
1826 unregister_netdevice(self->netdev);
1827 } else {
1828 enable_dma(self->io.dma);
1829 smsc_ircc_start_interrupts(self);
1830 netif_device_attach(self->netdev);
1831 }
1832 }
1833 self->io.suspended = 0;
1834 rtnl_unlock();
1835 }
1836 return 0;
1837 }
1838
1839 /*
1840 * Function smsc_ircc_close (self)
1841 *
1842 * Close driver instance
1843 *
1844 */
1845 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1846 {
1847 IRDA_DEBUG(1, "%s\n", __func__);
1848
1849 IRDA_ASSERT(self != NULL, return -1;);
1850
1851 platform_device_unregister(self->pldev);
1852
1853 /* Remove netdevice */
1854 unregister_netdev(self->netdev);
1855
1856 smsc_ircc_stop_interrupts(self);
1857
1858 /* Release the PORTS that this driver is using */
1859 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1860 self->io.fir_base);
1861
1862 release_region(self->io.fir_base, self->io.fir_ext);
1863
1864 IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
1865 self->io.sir_base);
1866
1867 release_region(self->io.sir_base, self->io.sir_ext);
1868
1869 if (self->tx_buff.head)
1870 dma_free_coherent(NULL, self->tx_buff.truesize,
1871 self->tx_buff.head, self->tx_buff_dma);
1872
1873 if (self->rx_buff.head)
1874 dma_free_coherent(NULL, self->rx_buff.truesize,
1875 self->rx_buff.head, self->rx_buff_dma);
1876
1877 free_netdev(self->netdev);
1878
1879 return 0;
1880 }
1881
1882 static void __exit smsc_ircc_cleanup(void)
1883 {
1884 int i;
1885
1886 IRDA_DEBUG(1, "%s\n", __func__);
1887
1888 for (i = 0; i < 2; i++) {
1889 if (dev_self[i])
1890 smsc_ircc_close(dev_self[i]);
1891 }
1892
1893 if (pnp_driver_registered)
1894 pnp_unregister_driver(&smsc_ircc_pnp_driver);
1895
1896 platform_driver_unregister(&smsc_ircc_driver);
1897 }
1898
1899 /*
1900 * Start SIR operations
1901 *
1902 * This function *must* be called with spinlock held, because it may
1903 * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1904 */
1905 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1906 {
1907 struct net_device *dev;
1908 int fir_base, sir_base;
1909
1910 IRDA_DEBUG(3, "%s\n", __func__);
1911
1912 IRDA_ASSERT(self != NULL, return;);
1913 dev = self->netdev;
1914 IRDA_ASSERT(dev != NULL, return;);
1915
1916 fir_base = self->io.fir_base;
1917 sir_base = self->io.sir_base;
1918
1919 /* Reset everything */
1920 outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
1921
1922 #if SMSC_IRCC2_C_SIR_STOP
1923 /*smsc_ircc_sir_stop(self);*/
1924 #endif
1925
1926 register_bank(fir_base, 1);
1927 outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
1928
1929 /* Initialize UART */
1930 outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
1931 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
1932
1933 /* Turn on interrups */
1934 outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
1935
1936 IRDA_DEBUG(3, "%s() - exit\n", __func__);
1937
1938 outb(0x00, fir_base + IRCC_MASTER);
1939 }
1940
1941 #if SMSC_IRCC2_C_SIR_STOP
1942 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1943 {
1944 int iobase;
1945
1946 IRDA_DEBUG(3, "%s\n", __func__);
1947 iobase = self->io.sir_base;
1948
1949 /* Reset UART */
1950 outb(0, iobase + UART_MCR);
1951
1952 /* Turn off interrupts */
1953 outb(0, iobase + UART_IER);
1954 }
1955 #endif
1956
1957 /*
1958 * Function smsc_sir_write_wakeup (self)
1959 *
1960 * Called by the SIR interrupt handler when there's room for more data.
1961 * If we have more packets to send, we send them here.
1962 *
1963 */
1964 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1965 {
1966 int actual = 0;
1967 int iobase;
1968 int fcr;
1969
1970 IRDA_ASSERT(self != NULL, return;);
1971
1972 IRDA_DEBUG(4, "%s\n", __func__);
1973
1974 iobase = self->io.sir_base;
1975
1976 /* Finished with frame? */
1977 if (self->tx_buff.len > 0) {
1978 /* Write data left in transmit buffer */
1979 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1980 self->tx_buff.data, self->tx_buff.len);
1981 self->tx_buff.data += actual;
1982 self->tx_buff.len -= actual;
1983 } else {
1984
1985 /*if (self->tx_buff.len ==0) {*/
1986
1987 /*
1988 * Now serial buffer is almost free & we can start
1989 * transmission of another packet. But first we must check
1990 * if we need to change the speed of the hardware
1991 */
1992 if (self->new_speed) {
1993 IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1994 __func__, self->new_speed);
1995 smsc_ircc_sir_wait_hw_transmitter_finish(self);
1996 smsc_ircc_change_speed(self, self->new_speed);
1997 self->new_speed = 0;
1998 } else {
1999 /* Tell network layer that we want more frames */
2000 netif_wake_queue(self->netdev);
2001 }
2002 self->netdev->stats.tx_packets++;
2003
2004 if (self->io.speed <= 115200) {
2005 /*
2006 * Reset Rx FIFO to make sure that all reflected transmit data
2007 * is discarded. This is needed for half duplex operation
2008 */
2009 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
2010 fcr |= self->io.speed < 38400 ?
2011 UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
2012
2013 outb(fcr, iobase + UART_FCR);
2014
2015 /* Turn on receive interrupts */
2016 outb(UART_IER_RDI, iobase + UART_IER);
2017 }
2018 }
2019 }
2020
2021 /*
2022 * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
2023 *
2024 * Fill Tx FIFO with transmit data
2025 *
2026 */
2027 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
2028 {
2029 int actual = 0;
2030
2031 /* Tx FIFO should be empty! */
2032 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
2033 IRDA_WARNING("%s(), failed, fifo not empty!\n", __func__);
2034 return 0;
2035 }
2036
2037 /* Fill FIFO with current frame */
2038 while (fifo_size-- > 0 && actual < len) {
2039 /* Transmit next byte */
2040 outb(buf[actual], iobase + UART_TX);
2041 actual++;
2042 }
2043 return actual;
2044 }
2045
2046 /*
2047 * Function smsc_ircc_is_receiving (self)
2048 *
2049 * Returns true is we are currently receiving data
2050 *
2051 */
2052 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
2053 {
2054 return (self->rx_buff.state != OUTSIDE_FRAME);
2055 }
2056
2057
2058 /*
2059 * Function smsc_ircc_probe_transceiver(self)
2060 *
2061 * Tries to find the used Transceiver
2062 *
2063 */
2064 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
2065 {
2066 unsigned int i;
2067
2068 IRDA_ASSERT(self != NULL, return;);
2069
2070 for (i = 0; smsc_transceivers[i].name != NULL; i++)
2071 if (smsc_transceivers[i].probe(self->io.fir_base)) {
2072 IRDA_MESSAGE(" %s transceiver found\n",
2073 smsc_transceivers[i].name);
2074 self->transceiver= i + 1;
2075 return;
2076 }
2077
2078 IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
2079 smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
2080
2081 self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
2082 }
2083
2084
2085 /*
2086 * Function smsc_ircc_set_transceiver_for_speed(self, speed)
2087 *
2088 * Set the transceiver according to the speed
2089 *
2090 */
2091 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
2092 {
2093 unsigned int trx;
2094
2095 trx = self->transceiver;
2096 if (trx > 0)
2097 smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
2098 }
2099
2100 /*
2101 * Function smsc_ircc_wait_hw_transmitter_finish ()
2102 *
2103 * Wait for the real end of HW transmission
2104 *
2105 * The UART is a strict FIFO, and we get called only when we have finished
2106 * pushing data to the FIFO, so the maximum amount of time we must wait
2107 * is only for the FIFO to drain out.
2108 *
2109 * We use a simple calibrated loop. We may need to adjust the loop
2110 * delay (udelay) to balance I/O traffic and latency. And we also need to
2111 * adjust the maximum timeout.
2112 * It would probably be better to wait for the proper interrupt,
2113 * but it doesn't seem to be available.
2114 *
2115 * We can't use jiffies or kernel timers because :
2116 * 1) We are called from the interrupt handler, which disable softirqs,
2117 * so jiffies won't be increased
2118 * 2) Jiffies granularity is usually very coarse (10ms), and we don't
2119 * want to wait that long to detect stuck hardware.
2120 * Jean II
2121 */
2122
2123 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
2124 {
2125 int iobase = self->io.sir_base;
2126 int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
2127
2128 /* Calibrated busy loop */
2129 while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
2130 udelay(1);
2131
2132 if (count < 0)
2133 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __func__);
2134 }
2135
2136
2137 /* PROBING
2138 *
2139 * REVISIT we can be told about the device by PNP, and should use that info
2140 * instead of probing hardware and creating a platform_device ...
2141 */
2142
2143 static int __init smsc_ircc_look_for_chips(void)
2144 {
2145 struct smsc_chip_address *address;
2146 char *type;
2147 unsigned int cfg_base, found;
2148
2149 found = 0;
2150 address = possible_addresses;
2151
2152 while (address->cfg_base) {
2153 cfg_base = address->cfg_base;
2154
2155 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __func__, cfg_base, address->type);*/
2156
2157 if (address->type & SMSCSIO_TYPE_FDC) {
2158 type = "FDC";
2159 if (address->type & SMSCSIO_TYPE_FLAT)
2160 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
2161 found++;
2162
2163 if (address->type & SMSCSIO_TYPE_PAGED)
2164 if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
2165 found++;
2166 }
2167 if (address->type & SMSCSIO_TYPE_LPC) {
2168 type = "LPC";
2169 if (address->type & SMSCSIO_TYPE_FLAT)
2170 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
2171 found++;
2172
2173 if (address->type & SMSCSIO_TYPE_PAGED)
2174 if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
2175 found++;
2176 }
2177 address++;
2178 }
2179 return found;
2180 }
2181
2182 /*
2183 * Function smsc_superio_flat (chip, base, type)
2184 *
2185 * Try to get configuration of a smc SuperIO chip with flat register model
2186 *
2187 */
2188 static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
2189 {
2190 unsigned short firbase, sirbase;
2191 u8 mode, dma, irq;
2192 int ret = -ENODEV;
2193
2194 IRDA_DEBUG(1, "%s\n", __func__);
2195
2196 if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
2197 return ret;
2198
2199 outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2200 mode = inb(cfgbase + 1);
2201
2202 /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __func__, mode);*/
2203
2204 if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2205 IRDA_WARNING("%s(): IrDA not enabled\n", __func__);
2206
2207 outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2208 sirbase = inb(cfgbase + 1) << 2;
2209
2210 /* FIR iobase */
2211 outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2212 firbase = inb(cfgbase + 1) << 3;
2213
2214 /* DMA */
2215 outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2216 dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2217
2218 /* IRQ */
2219 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2220 irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2221
2222 IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __func__, firbase, sirbase, dma, irq, mode);
2223
2224 if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2225 ret = 0;
2226
2227 /* Exit configuration */
2228 outb(SMSCSIO_CFGEXITKEY, cfgbase);
2229
2230 return ret;
2231 }
2232
2233 /*
2234 * Function smsc_superio_paged (chip, base, type)
2235 *
2236 * Try to get configuration of a smc SuperIO chip with paged register model
2237 *
2238 */
2239 static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
2240 {
2241 unsigned short fir_io, sir_io;
2242 int ret = -ENODEV;
2243
2244 IRDA_DEBUG(1, "%s\n", __func__);
2245
2246 if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
2247 return ret;
2248
2249 /* Select logical device (UART2) */
2250 outb(0x07, cfg_base);
2251 outb(0x05, cfg_base + 1);
2252
2253 /* SIR iobase */
2254 outb(0x60, cfg_base);
2255 sir_io = inb(cfg_base + 1) << 8;
2256 outb(0x61, cfg_base);
2257 sir_io |= inb(cfg_base + 1);
2258
2259 /* Read FIR base */
2260 outb(0x62, cfg_base);
2261 fir_io = inb(cfg_base + 1) << 8;
2262 outb(0x63, cfg_base);
2263 fir_io |= inb(cfg_base + 1);
2264 outb(0x2b, cfg_base); /* ??? */
2265
2266 if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2267 ret = 0;
2268
2269 /* Exit configuration */
2270 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2271
2272 return ret;
2273 }
2274
2275
2276 static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
2277 {
2278 IRDA_DEBUG(1, "%s\n", __func__);
2279
2280 outb(reg, cfg_base);
2281 return inb(cfg_base) != reg ? -1 : 0;
2282 }
2283
2284 static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
2285 {
2286 u8 devid, xdevid, rev;
2287
2288 IRDA_DEBUG(1, "%s\n", __func__);
2289
2290 /* Leave configuration */
2291
2292 outb(SMSCSIO_CFGEXITKEY, cfg_base);
2293
2294 if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
2295 return NULL;
2296
2297 outb(reg, cfg_base);
2298
2299 xdevid = inb(cfg_base + 1);
2300
2301 /* Enter configuration */
2302
2303 outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2304
2305 #if 0
2306 if (smsc_access(cfg_base,0x55)) /* send second key and check */
2307 return NULL;
2308 #endif
2309
2310 /* probe device ID */
2311
2312 if (smsc_access(cfg_base, reg))
2313 return NULL;
2314
2315 devid = inb(cfg_base + 1);
2316
2317 if (devid == 0 || devid == 0xff) /* typical values for unused port */
2318 return NULL;
2319
2320 /* probe revision ID */
2321
2322 if (smsc_access(cfg_base, reg + 1))
2323 return NULL;
2324
2325 rev = inb(cfg_base + 1);
2326
2327 if (rev >= 128) /* i think this will make no sense */
2328 return NULL;
2329
2330 if (devid == xdevid) /* protection against false positives */
2331 return NULL;
2332
2333 /* Check for expected device ID; are there others? */
2334
2335 while (chip->devid != devid) {
2336
2337 chip++;
2338
2339 if (chip->name == NULL)
2340 return NULL;
2341 }
2342
2343 IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
2344 devid, rev, cfg_base, type, chip->name);
2345
2346 if (chip->rev > rev) {
2347 IRDA_MESSAGE("Revision higher than expected\n");
2348 return NULL;
2349 }
2350
2351 if (chip->flags & NoIRDA)
2352 IRDA_MESSAGE("chipset does not support IRDA\n");
2353
2354 return chip;
2355 }
2356
2357 static int __init smsc_superio_fdc(unsigned short cfg_base)
2358 {
2359 int ret = -1;
2360
2361 if (!request_region(cfg_base, 2, driver_name)) {
2362 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2363 __func__, cfg_base);
2364 } else {
2365 if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
2366 !smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
2367 ret = 0;
2368
2369 release_region(cfg_base, 2);
2370 }
2371
2372 return ret;
2373 }
2374
2375 static int __init smsc_superio_lpc(unsigned short cfg_base)
2376 {
2377 int ret = -1;
2378
2379 if (!request_region(cfg_base, 2, driver_name)) {
2380 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2381 __func__, cfg_base);
2382 } else {
2383 if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
2384 !smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
2385 ret = 0;
2386
2387 release_region(cfg_base, 2);
2388 }
2389 return ret;
2390 }
2391
2392 /*
2393 * Look for some specific subsystem setups that need
2394 * pre-configuration not properly done by the BIOS (especially laptops)
2395 * This code is based in part on smcinit.c, tosh1800-smcinit.c
2396 * and tosh2450-smcinit.c. The table lists the device entries
2397 * for ISA bridges with an LPC (Low Pin Count) controller which
2398 * handles the communication with the SMSC device. After the LPC
2399 * controller is initialized through PCI, the SMSC device is initialized
2400 * through a dedicated port in the ISA port-mapped I/O area, this latter
2401 * area is used to configure the SMSC device with default
2402 * SIR and FIR I/O ports, DMA and IRQ. Different vendors have
2403 * used different sets of parameters and different control port
2404 * addresses making a subsystem device table necessary.
2405 */
2406 #ifdef CONFIG_PCI
2407 #define PCIID_VENDOR_INTEL 0x8086
2408 #define PCIID_VENDOR_ALI 0x10b9
2409 static struct smsc_ircc_subsystem_configuration subsystem_configurations[] __initdata = {
2410 /*
2411 * Subsystems needing entries:
2412 * 0x10b9:0x1533 0x103c:0x0850 HP nx9010 family
2413 * 0x10b9:0x1533 0x0e11:0x005a Compaq nc4000 family
2414 * 0x8086:0x24cc 0x0e11:0x002a HP nx9000 family
2415 */
2416 {
2417 /* Guessed entry */
2418 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2419 .device = 0x24cc,
2420 .subvendor = 0x103c,
2421 .subdevice = 0x08bc,
2422 .sir_io = 0x02f8,
2423 .fir_io = 0x0130,
2424 .fir_irq = 0x05,
2425 .fir_dma = 0x03,
2426 .cfg_base = 0x004e,
2427 .preconfigure = preconfigure_through_82801,
2428 .name = "HP nx5000 family",
2429 },
2430 {
2431 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2432 .device = 0x24cc,
2433 .subvendor = 0x103c,
2434 .subdevice = 0x088c,
2435 /* Quite certain these are the same for nc8000 as for nc6000 */
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 nc8000 family",
2443 },
2444 {
2445 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2446 .device = 0x24cc,
2447 .subvendor = 0x103c,
2448 .subdevice = 0x0890,
2449 .sir_io = 0x02f8,
2450 .fir_io = 0x0130,
2451 .fir_irq = 0x05,
2452 .fir_dma = 0x03,
2453 .cfg_base = 0x004e,
2454 .preconfigure = preconfigure_through_82801,
2455 .name = "HP nc6000 family",
2456 },
2457 {
2458 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
2459 .device = 0x24cc,
2460 .subvendor = 0x0e11,
2461 .subdevice = 0x0860,
2462 /* I assume these are the same for x1000 as for the others */
2463 .sir_io = 0x02e8,
2464 .fir_io = 0x02f8,
2465 .fir_irq = 0x07,
2466 .fir_dma = 0x03,
2467 .cfg_base = 0x002e,
2468 .preconfigure = preconfigure_through_82801,
2469 .name = "Compaq x1000 family",
2470 },
2471 {
2472 /* Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge */
2473 .vendor = PCIID_VENDOR_INTEL,
2474 .device = 0x24c0,
2475 .subvendor = 0x1179,
2476 .subdevice = 0xffff, /* 0xffff is "any" */
2477 .sir_io = 0x03f8,
2478 .fir_io = 0x0130,
2479 .fir_irq = 0x07,
2480 .fir_dma = 0x01,
2481 .cfg_base = 0x002e,
2482 .preconfigure = preconfigure_through_82801,
2483 .name = "Toshiba laptop with Intel 82801DB/DBL LPC bridge",
2484 },
2485 {
2486 .vendor = PCIID_VENDOR_INTEL, /* Intel 82801CAM ISA bridge */
2487 .device = 0x248c,
2488 .subvendor = 0x1179,
2489 .subdevice = 0xffff, /* 0xffff is "any" */
2490 .sir_io = 0x03f8,
2491 .fir_io = 0x0130,
2492 .fir_irq = 0x03,
2493 .fir_dma = 0x03,
2494 .cfg_base = 0x002e,
2495 .preconfigure = preconfigure_through_82801,
2496 .name = "Toshiba laptop with Intel 82801CAM ISA bridge",
2497 },
2498 {
2499 /* 82801DBM (ICH4-M) LPC Interface Bridge */
2500 .vendor = PCIID_VENDOR_INTEL,
2501 .device = 0x24cc,
2502 .subvendor = 0x1179,
2503 .subdevice = 0xffff, /* 0xffff is "any" */
2504 .sir_io = 0x03f8,
2505 .fir_io = 0x0130,
2506 .fir_irq = 0x03,
2507 .fir_dma = 0x03,
2508 .cfg_base = 0x002e,
2509 .preconfigure = preconfigure_through_82801,
2510 .name = "Toshiba laptop with Intel 8281DBM LPC bridge",
2511 },
2512 {
2513 /* ALi M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] */
2514 .vendor = PCIID_VENDOR_ALI,
2515 .device = 0x1533,
2516 .subvendor = 0x1179,
2517 .subdevice = 0xffff, /* 0xffff is "any" */
2518 .sir_io = 0x02e8,
2519 .fir_io = 0x02f8,
2520 .fir_irq = 0x07,
2521 .fir_dma = 0x03,
2522 .cfg_base = 0x002e,
2523 .preconfigure = preconfigure_through_ali,
2524 .name = "Toshiba laptop with ALi ISA bridge",
2525 },
2526 { } // Terminator
2527 };
2528
2529
2530 /*
2531 * This sets up the basic SMSC parameters
2532 * (FIR port, SIR port, FIR DMA, FIR IRQ)
2533 * through the chip configuration port.
2534 */
2535 static int __init preconfigure_smsc_chip(struct
2536 smsc_ircc_subsystem_configuration
2537 *conf)
2538 {
2539 unsigned short iobase = conf->cfg_base;
2540 unsigned char tmpbyte;
2541
2542 outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state
2543 outb(SMSCSIOFLAT_DEVICEID_REG, iobase); // set for device ID
2544 tmpbyte = inb(iobase +1); // Read device ID
2545 IRDA_DEBUG(0,
2546 "Detected Chip id: 0x%02x, setting up registers...\n",
2547 tmpbyte);
2548
2549 /* Disable UART1 and set up SIR I/O port */
2550 outb(0x24, iobase); // select CR24 - UART1 base addr
2551 outb(0x00, iobase + 1); // disable UART1
2552 outb(SMSCSIOFLAT_UART2BASEADDR_REG, iobase); // select CR25 - UART2 base addr
2553 outb( (conf->sir_io >> 2), iobase + 1); // bits 2-9 of 0x3f8
2554 tmpbyte = inb(iobase + 1);
2555 if (tmpbyte != (conf->sir_io >> 2) ) {
2556 IRDA_WARNING("ERROR: could not configure SIR ioport.\n");
2557 IRDA_WARNING("Try to supply ircc_cfg argument.\n");
2558 return -ENXIO;
2559 }
2560
2561 /* Set up FIR IRQ channel for UART2 */
2562 outb(SMSCSIOFLAT_UARTIRQSELECT_REG, iobase); // select CR28 - UART1,2 IRQ select
2563 tmpbyte = inb(iobase + 1);
2564 tmpbyte &= SMSCSIOFLAT_UART1IRQSELECT_MASK; // Do not touch the UART1 portion
2565 tmpbyte |= (conf->fir_irq & SMSCSIOFLAT_UART2IRQSELECT_MASK);
2566 outb(tmpbyte, iobase + 1);
2567 tmpbyte = inb(iobase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2568 if (tmpbyte != conf->fir_irq) {
2569 IRDA_WARNING("ERROR: could not configure FIR IRQ channel.\n");
2570 return -ENXIO;
2571 }
2572
2573 /* Set up FIR I/O port */
2574 outb(SMSCSIOFLAT_FIRBASEADDR_REG, iobase); // CR2B - SCE (FIR) base addr
2575 outb((conf->fir_io >> 3), iobase + 1);
2576 tmpbyte = inb(iobase + 1);
2577 if (tmpbyte != (conf->fir_io >> 3) ) {
2578 IRDA_WARNING("ERROR: could not configure FIR I/O port.\n");
2579 return -ENXIO;
2580 }
2581
2582 /* Set up FIR DMA channel */
2583 outb(SMSCSIOFLAT_FIRDMASELECT_REG, iobase); // CR2C - SCE (FIR) DMA select
2584 outb((conf->fir_dma & LPC47N227_FIRDMASELECT_MASK), iobase + 1); // DMA
2585 tmpbyte = inb(iobase + 1) & LPC47N227_FIRDMASELECT_MASK;
2586 if (tmpbyte != (conf->fir_dma & LPC47N227_FIRDMASELECT_MASK)) {
2587 IRDA_WARNING("ERROR: could not configure FIR DMA channel.\n");
2588 return -ENXIO;
2589 }
2590
2591 outb(SMSCSIOFLAT_UARTMODE0C_REG, iobase); // CR0C - UART mode
2592 tmpbyte = inb(iobase + 1);
2593 tmpbyte &= ~SMSCSIOFLAT_UART2MODE_MASK |
2594 SMSCSIOFLAT_UART2MODE_VAL_IRDA;
2595 outb(tmpbyte, iobase + 1); // enable IrDA (HPSIR) mode, high speed
2596
2597 outb(LPC47N227_APMBOOTDRIVE_REG, iobase); // CR07 - Auto Pwr Mgt/boot drive sel
2598 tmpbyte = inb(iobase + 1);
2599 outb(tmpbyte | LPC47N227_UART2AUTOPWRDOWN_MASK, iobase + 1); // enable UART2 autopower down
2600
2601 /* This one was not part of tosh1800 */
2602 outb(0x0a, iobase); // CR0a - ecp fifo / ir mux
2603 tmpbyte = inb(iobase + 1);
2604 outb(tmpbyte | 0x40, iobase + 1); // send active device to ir port
2605
2606 outb(LPC47N227_UART12POWER_REG, iobase); // CR02 - UART 1,2 power
2607 tmpbyte = inb(iobase + 1);
2608 outb(tmpbyte | LPC47N227_UART2POWERDOWN_MASK, iobase + 1); // UART2 power up mode, UART1 power down
2609
2610 outb(LPC47N227_FDCPOWERVALIDCONF_REG, iobase); // CR00 - FDC Power/valid config cycle
2611 tmpbyte = inb(iobase + 1);
2612 outb(tmpbyte | LPC47N227_VALID_MASK, iobase + 1); // valid config cycle done
2613
2614 outb(LPC47N227_CFGEXITKEY, iobase); // Exit configuration
2615
2616 return 0;
2617 }
2618
2619 /* 82801CAM generic registers */
2620 #define VID 0x00
2621 #define DID 0x02
2622 #define PIRQ_A_D_ROUT 0x60
2623 #define SIRQ_CNTL 0x64
2624 #define PIRQ_E_H_ROUT 0x68
2625 #define PCI_DMA_C 0x90
2626 /* LPC-specific registers */
2627 #define COM_DEC 0xe0
2628 #define GEN1_DEC 0xe4
2629 #define LPC_EN 0xe6
2630 #define GEN2_DEC 0xec
2631 /*
2632 * Sets up the I/O range using the 82801CAM ISA bridge, 82801DBM LPC bridge
2633 * or Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge.
2634 * They all work the same way!
2635 */
2636 static int __init preconfigure_through_82801(struct pci_dev *dev,
2637 struct
2638 smsc_ircc_subsystem_configuration
2639 *conf)
2640 {
2641 unsigned short tmpword;
2642 unsigned char tmpbyte;
2643
2644 IRDA_MESSAGE("Setting up Intel 82801 controller and SMSC device\n");
2645 /*
2646 * Select the range for the COMA COM port (SIR)
2647 * Register COM_DEC:
2648 * Bit 7: reserved
2649 * Bit 6-4, COMB decode range
2650 * Bit 3: reserved
2651 * Bit 2-0, COMA decode range
2652 *
2653 * Decode ranges:
2654 * 000 = 0x3f8-0x3ff (COM1)
2655 * 001 = 0x2f8-0x2ff (COM2)
2656 * 010 = 0x220-0x227
2657 * 011 = 0x228-0x22f
2658 * 100 = 0x238-0x23f
2659 * 101 = 0x2e8-0x2ef (COM4)
2660 * 110 = 0x338-0x33f
2661 * 111 = 0x3e8-0x3ef (COM3)
2662 */
2663 pci_read_config_byte(dev, COM_DEC, &tmpbyte);
2664 tmpbyte &= 0xf8; /* mask COMA bits */
2665 switch(conf->sir_io) {
2666 case 0x3f8:
2667 tmpbyte |= 0x00;
2668 break;
2669 case 0x2f8:
2670 tmpbyte |= 0x01;
2671 break;
2672 case 0x220:
2673 tmpbyte |= 0x02;
2674 break;
2675 case 0x228:
2676 tmpbyte |= 0x03;
2677 break;
2678 case 0x238:
2679 tmpbyte |= 0x04;
2680 break;
2681 case 0x2e8:
2682 tmpbyte |= 0x05;
2683 break;
2684 case 0x338:
2685 tmpbyte |= 0x06;
2686 break;
2687 case 0x3e8:
2688 tmpbyte |= 0x07;
2689 break;
2690 default:
2691 tmpbyte |= 0x01; /* COM2 default */
2692 }
2693 IRDA_DEBUG(1, "COM_DEC (write): 0x%02x\n", tmpbyte);
2694 pci_write_config_byte(dev, COM_DEC, tmpbyte);
2695
2696 /* Enable Low Pin Count interface */
2697 pci_read_config_word(dev, LPC_EN, &tmpword);
2698 /* These seem to be set up at all times,
2699 * just make sure it is properly set.
2700 */
2701 switch(conf->cfg_base) {
2702 case 0x04e:
2703 tmpword |= 0x2000;
2704 break;
2705 case 0x02e:
2706 tmpword |= 0x1000;
2707 break;
2708 case 0x062:
2709 tmpword |= 0x0800;
2710 break;
2711 case 0x060:
2712 tmpword |= 0x0400;
2713 break;
2714 default:
2715 IRDA_WARNING("Uncommon I/O base address: 0x%04x\n",
2716 conf->cfg_base);
2717 break;
2718 }
2719 tmpword &= 0xfffd; /* disable LPC COMB */
2720 tmpword |= 0x0001; /* set bit 0 : enable LPC COMA addr range (GEN2) */
2721 IRDA_DEBUG(1, "LPC_EN (write): 0x%04x\n", tmpword);
2722 pci_write_config_word(dev, LPC_EN, tmpword);
2723
2724 /*
2725 * Configure LPC DMA channel
2726 * PCI_DMA_C bits:
2727 * Bit 15-14: DMA channel 7 select
2728 * Bit 13-12: DMA channel 6 select
2729 * Bit 11-10: DMA channel 5 select
2730 * Bit 9-8: Reserved
2731 * Bit 7-6: DMA channel 3 select
2732 * Bit 5-4: DMA channel 2 select
2733 * Bit 3-2: DMA channel 1 select
2734 * Bit 1-0: DMA channel 0 select
2735 * 00 = Reserved value
2736 * 01 = PC/PCI DMA
2737 * 10 = Reserved value
2738 * 11 = LPC I/F DMA
2739 */
2740 pci_read_config_word(dev, PCI_DMA_C, &tmpword);
2741 switch(conf->fir_dma) {
2742 case 0x07:
2743 tmpword |= 0xc000;
2744 break;
2745 case 0x06:
2746 tmpword |= 0x3000;
2747 break;
2748 case 0x05:
2749 tmpword |= 0x0c00;
2750 break;
2751 case 0x03:
2752 tmpword |= 0x00c0;
2753 break;
2754 case 0x02:
2755 tmpword |= 0x0030;
2756 break;
2757 case 0x01:
2758 tmpword |= 0x000c;
2759 break;
2760 case 0x00:
2761 tmpword |= 0x0003;
2762 break;
2763 default:
2764 break; /* do not change settings */
2765 }
2766 IRDA_DEBUG(1, "PCI_DMA_C (write): 0x%04x\n", tmpword);
2767 pci_write_config_word(dev, PCI_DMA_C, tmpword);
2768
2769 /*
2770 * GEN2_DEC bits:
2771 * Bit 15-4: Generic I/O range
2772 * Bit 3-1: reserved (read as 0)
2773 * Bit 0: enable GEN2 range on LPC I/F
2774 */
2775 tmpword = conf->fir_io & 0xfff8;
2776 tmpword |= 0x0001;
2777 IRDA_DEBUG(1, "GEN2_DEC (write): 0x%04x\n", tmpword);
2778 pci_write_config_word(dev, GEN2_DEC, tmpword);
2779
2780 /* Pre-configure chip */
2781 return preconfigure_smsc_chip(conf);
2782 }
2783
2784 /*
2785 * Pre-configure a certain port on the ALi 1533 bridge.
2786 * This is based on reverse-engineering since ALi does not
2787 * provide any data sheet for the 1533 chip.
2788 */
2789 static void __init preconfigure_ali_port(struct pci_dev *dev,
2790 unsigned short port)
2791 {
2792 unsigned char reg;
2793 /* These bits obviously control the different ports */
2794 unsigned char mask;
2795 unsigned char tmpbyte;
2796
2797 switch(port) {
2798 case 0x0130:
2799 case 0x0178:
2800 reg = 0xb0;
2801 mask = 0x80;
2802 break;
2803 case 0x03f8:
2804 reg = 0xb4;
2805 mask = 0x80;
2806 break;
2807 case 0x02f8:
2808 reg = 0xb4;
2809 mask = 0x30;
2810 break;
2811 case 0x02e8:
2812 reg = 0xb4;
2813 mask = 0x08;
2814 break;
2815 default:
2816 IRDA_ERROR("Failed to configure unsupported port on ALi 1533 bridge: 0x%04x\n", port);
2817 return;
2818 }
2819
2820 pci_read_config_byte(dev, reg, &tmpbyte);
2821 /* Turn on the right bits */
2822 tmpbyte |= mask;
2823 pci_write_config_byte(dev, reg, tmpbyte);
2824 IRDA_MESSAGE("Activated ALi 1533 ISA bridge port 0x%04x.\n", port);
2825 return;
2826 }
2827
2828 static int __init preconfigure_through_ali(struct pci_dev *dev,
2829 struct
2830 smsc_ircc_subsystem_configuration
2831 *conf)
2832 {
2833 /* Configure the two ports on the ALi 1533 */
2834 preconfigure_ali_port(dev, conf->sir_io);
2835 preconfigure_ali_port(dev, conf->fir_io);
2836
2837 /* Pre-configure chip */
2838 return preconfigure_smsc_chip(conf);
2839 }
2840
2841 static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
2842 unsigned short ircc_fir,
2843 unsigned short ircc_sir,
2844 unsigned char ircc_dma,
2845 unsigned char ircc_irq)
2846 {
2847 struct pci_dev *dev = NULL;
2848 unsigned short ss_vendor = 0x0000;
2849 unsigned short ss_device = 0x0000;
2850 int ret = 0;
2851
2852 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2853
2854 while (dev != NULL) {
2855 struct smsc_ircc_subsystem_configuration *conf;
2856
2857 /*
2858 * Cache the subsystem vendor/device:
2859 * some manufacturers fail to set this for all components,
2860 * so we save it in case there is just 0x0000 0x0000 on the
2861 * device we want to check.
2862 */
2863 if (dev->subsystem_vendor != 0x0000U) {
2864 ss_vendor = dev->subsystem_vendor;
2865 ss_device = dev->subsystem_device;
2866 }
2867 conf = subsystem_configurations;
2868 for( ; conf->subvendor; conf++) {
2869 if(conf->vendor == dev->vendor &&
2870 conf->device == dev->device &&
2871 conf->subvendor == ss_vendor &&
2872 /* Sometimes these are cached values */
2873 (conf->subdevice == ss_device ||
2874 conf->subdevice == 0xffff)) {
2875 struct smsc_ircc_subsystem_configuration
2876 tmpconf;
2877
2878 memcpy(&tmpconf, conf,
2879 sizeof(struct smsc_ircc_subsystem_configuration));
2880
2881 /*
2882 * Override the default values with anything
2883 * passed in as parameter
2884 */
2885 if (ircc_cfg != 0)
2886 tmpconf.cfg_base = ircc_cfg;
2887 if (ircc_fir != 0)
2888 tmpconf.fir_io = ircc_fir;
2889 if (ircc_sir != 0)
2890 tmpconf.sir_io = ircc_sir;
2891 if (ircc_dma != DMA_INVAL)
2892 tmpconf.fir_dma = ircc_dma;
2893 if (ircc_irq != IRQ_INVAL)
2894 tmpconf.fir_irq = ircc_irq;
2895
2896 IRDA_MESSAGE("Detected unconfigured %s SMSC IrDA chip, pre-configuring device.\n", conf->name);
2897 if (conf->preconfigure)
2898 ret = conf->preconfigure(dev, &tmpconf);
2899 else
2900 ret = -ENODEV;
2901 }
2902 }
2903 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
2904 }
2905
2906 return ret;
2907 }
2908 #endif // CONFIG_PCI
2909
2910 /************************************************
2911 *
2912 * Transceivers specific functions
2913 *
2914 ************************************************/
2915
2916
2917 /*
2918 * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2919 *
2920 * Program transceiver through smsc-ircc ATC circuitry
2921 *
2922 */
2923
2924 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2925 {
2926 unsigned long jiffies_now, jiffies_timeout;
2927 u8 val;
2928
2929 jiffies_now = jiffies;
2930 jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2931
2932 /* ATC */
2933 register_bank(fir_base, 4);
2934 outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
2935 fir_base + IRCC_ATC);
2936
2937 while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
2938 !time_after(jiffies, jiffies_timeout))
2939 /* empty */;
2940
2941 if (val)
2942 IRDA_WARNING("%s(): ATC: 0x%02x\n", __func__,
2943 inb(fir_base + IRCC_ATC));
2944 }
2945
2946 /*
2947 * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2948 *
2949 * Probe transceiver smsc-ircc ATC circuitry
2950 *
2951 */
2952
2953 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2954 {
2955 return 0;
2956 }
2957
2958 /*
2959 * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2960 *
2961 * Set transceiver
2962 *
2963 */
2964
2965 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2966 {
2967 u8 fast_mode;
2968
2969 switch (speed) {
2970 default:
2971 case 576000 :
2972 fast_mode = 0;
2973 break;
2974 case 1152000 :
2975 case 4000000 :
2976 fast_mode = IRCC_LCR_A_FAST;
2977 break;
2978 }
2979 register_bank(fir_base, 0);
2980 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
2981 }
2982
2983 /*
2984 * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2985 *
2986 * Probe transceiver
2987 *
2988 */
2989
2990 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2991 {
2992 return 0;
2993 }
2994
2995 /*
2996 * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2997 *
2998 * Set transceiver
2999 *
3000 */
3001
3002 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
3003 {
3004 u8 fast_mode;
3005
3006 switch (speed) {
3007 default:
3008 case 576000 :
3009 fast_mode = 0;
3010 break;
3011 case 1152000 :
3012 case 4000000 :
3013 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
3014 break;
3015
3016 }
3017 /* This causes an interrupt */
3018 register_bank(fir_base, 0);
3019 outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
3020 }
3021
3022 /*
3023 * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
3024 *
3025 * Probe transceiver
3026 *
3027 */
3028
3029 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
3030 {
3031 return 0;
3032 }
3033
3034
3035 module_init(smsc_ircc_init);
3036 module_exit(smsc_ircc_cleanup);
Linux with added FPC-III support