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Linux 3.11-rc3
[cris-mirror.git] / drivers / media / rc / nuvoton-cir.c
blob21ee0dc1b7ec041826bf7d3dfd7f0634258bf965
1 /*
2 * Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR
3 *
4 * Copyright (C) 2010 Jarod Wilson <jarod@redhat.com>
5 * Copyright (C) 2009 Nuvoton PS Team
6 *
7 * Special thanks to Nuvoton for providing hardware, spec sheets and
8 * sample code upon which portions of this driver are based. Indirect
9 * thanks also to Maxim Levitsky, whose ene_ir driver this driver is
10 * modeled after.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
25 * USA
26 */
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/pnp.h>
33 #include <linux/io.h>
34 #include <linux/interrupt.h>
35 #include <linux/sched.h>
36 #include <linux/slab.h>
37 #include <media/rc-core.h>
38 #include <linux/pci_ids.h>
39
40 #include "nuvoton-cir.h"
41
42 /* write val to config reg */
43 static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg)
44 {
45 outb(reg, nvt->cr_efir);
46 outb(val, nvt->cr_efdr);
47 }
48
49 /* read val from config reg */
50 static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg)
51 {
52 outb(reg, nvt->cr_efir);
53 return inb(nvt->cr_efdr);
54 }
55
56 /* update config register bit without changing other bits */
57 static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
58 {
59 u8 tmp = nvt_cr_read(nvt, reg) | val;
60 nvt_cr_write(nvt, tmp, reg);
61 }
62
63 /* clear config register bit without changing other bits */
64 static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
65 {
66 u8 tmp = nvt_cr_read(nvt, reg) & ~val;
67 nvt_cr_write(nvt, tmp, reg);
68 }
69
70 /* enter extended function mode */
71 static inline void nvt_efm_enable(struct nvt_dev *nvt)
72 {
73 /* Enabling Extended Function Mode explicitly requires writing 2x */
74 outb(EFER_EFM_ENABLE, nvt->cr_efir);
75 outb(EFER_EFM_ENABLE, nvt->cr_efir);
76 }
77
78 /* exit extended function mode */
79 static inline void nvt_efm_disable(struct nvt_dev *nvt)
80 {
81 outb(EFER_EFM_DISABLE, nvt->cr_efir);
82 }
83
84 /*
85 * When you want to address a specific logical device, write its logical
86 * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing
87 * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN.
88 */
89 static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev)
90 {
91 outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir);
92 outb(ldev, nvt->cr_efdr);
93 }
94
95 /* write val to cir config register */
96 static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset)
97 {
98 outb(val, nvt->cir_addr + offset);
99 }
100
101 /* read val from cir config register */
102 static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset)
103 {
104 u8 val;
105
106 val = inb(nvt->cir_addr + offset);
107
108 return val;
109 }
110
111 /* write val to cir wake register */
112 static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt,
113 u8 val, u8 offset)
114 {
115 outb(val, nvt->cir_wake_addr + offset);
116 }
117
118 /* read val from cir wake config register */
119 static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
120 {
121 u8 val;
122
123 val = inb(nvt->cir_wake_addr + offset);
124
125 return val;
126 }
127
128 /* dump current cir register contents */
129 static void cir_dump_regs(struct nvt_dev *nvt)
130 {
131 nvt_efm_enable(nvt);
132 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
133
134 pr_info("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
135 pr_info(" * CR CIR ACTIVE : 0x%x\n",
136 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
137 pr_info(" * CR CIR BASE ADDR: 0x%x\n",
138 (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
139 nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
140 pr_info(" * CR CIR IRQ NUM: 0x%x\n",
141 nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
142
143 nvt_efm_disable(nvt);
144
145 pr_info("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
146 pr_info(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
147 pr_info(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
148 pr_info(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
149 pr_info(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
150 pr_info(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
151 pr_info(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
152 pr_info(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
153 pr_info(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
154 pr_info(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
155 pr_info(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
156 pr_info(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
157 pr_info(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
158 pr_info(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
159 pr_info(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
160 pr_info(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
161 pr_info(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
162 }
163
164 /* dump current cir wake register contents */
165 static void cir_wake_dump_regs(struct nvt_dev *nvt)
166 {
167 u8 i, fifo_len;
168
169 nvt_efm_enable(nvt);
170 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
171
172 pr_info("%s: Dump CIR WAKE logical device registers:\n",
173 NVT_DRIVER_NAME);
174 pr_info(" * CR CIR WAKE ACTIVE : 0x%x\n",
175 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
176 pr_info(" * CR CIR WAKE BASE ADDR: 0x%x\n",
177 (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
178 nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
179 pr_info(" * CR CIR WAKE IRQ NUM: 0x%x\n",
180 nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
181
182 nvt_efm_disable(nvt);
183
184 pr_info("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
185 pr_info(" * IRCON: 0x%x\n",
186 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
187 pr_info(" * IRSTS: 0x%x\n",
188 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
189 pr_info(" * IREN: 0x%x\n",
190 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
191 pr_info(" * FIFO CMP DEEP: 0x%x\n",
192 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
193 pr_info(" * FIFO CMP TOL: 0x%x\n",
194 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
195 pr_info(" * FIFO COUNT: 0x%x\n",
196 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
197 pr_info(" * SLCH: 0x%x\n",
198 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
199 pr_info(" * SLCL: 0x%x\n",
200 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
201 pr_info(" * FIFOCON: 0x%x\n",
202 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
203 pr_info(" * SRXFSTS: 0x%x\n",
204 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
205 pr_info(" * SAMPLE RX FIFO: 0x%x\n",
206 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
207 pr_info(" * WR FIFO DATA: 0x%x\n",
208 nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
209 pr_info(" * RD FIFO ONLY: 0x%x\n",
210 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
211 pr_info(" * RD FIFO ONLY IDX: 0x%x\n",
212 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
213 pr_info(" * FIFO IGNORE: 0x%x\n",
214 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
215 pr_info(" * IRFSM: 0x%x\n",
216 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM));
217
218 fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
219 pr_info("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
220 pr_info("* Contents =");
221 for (i = 0; i < fifo_len; i++)
222 pr_cont(" %02x",
223 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
224 pr_cont("\n");
225 }
226
227 /* detect hardware features */
228 static int nvt_hw_detect(struct nvt_dev *nvt)
229 {
230 unsigned long flags;
231 u8 chip_major, chip_minor;
232 int ret = 0;
233 char chip_id[12];
234 bool chip_unknown = false;
235
236 nvt_efm_enable(nvt);
237
238 /* Check if we're wired for the alternate EFER setup */
239 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
240 if (chip_major == 0xff) {
241 nvt->cr_efir = CR_EFIR2;
242 nvt->cr_efdr = CR_EFDR2;
243 nvt_efm_enable(nvt);
244 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
245 }
246
247 chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO);
248
249 /* these are the known working chip revisions... */
250 switch (chip_major) {
251 case CHIP_ID_HIGH_667:
252 strcpy(chip_id, "w83667hg\0");
253 if (chip_minor != CHIP_ID_LOW_667)
254 chip_unknown = true;
255 break;
256 case CHIP_ID_HIGH_677B:
257 strcpy(chip_id, "w83677hg\0");
258 if (chip_minor != CHIP_ID_LOW_677B2 &&
259 chip_minor != CHIP_ID_LOW_677B3)
260 chip_unknown = true;
261 break;
262 case CHIP_ID_HIGH_677C:
263 strcpy(chip_id, "w83677hg-c\0");
264 if (chip_minor != CHIP_ID_LOW_677C)
265 chip_unknown = true;
266 break;
267 default:
268 strcpy(chip_id, "w836x7hg\0");
269 chip_unknown = true;
270 break;
271 }
272
273 /* warn, but still let the driver load, if we don't know this chip */
274 if (chip_unknown)
275 nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, "
276 "it may not work...", chip_id, chip_major, chip_minor);
277 else
278 nvt_dbg("%s: chip id: 0x%02x 0x%02x",
279 chip_id, chip_major, chip_minor);
280
281 nvt_efm_disable(nvt);
282
283 spin_lock_irqsave(&nvt->nvt_lock, flags);
284 nvt->chip_major = chip_major;
285 nvt->chip_minor = chip_minor;
286 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
287
288 return ret;
289 }
290
291 static void nvt_cir_ldev_init(struct nvt_dev *nvt)
292 {
293 u8 val, psreg, psmask, psval;
294
295 if (nvt->chip_major == CHIP_ID_HIGH_667) {
296 psreg = CR_MULTIFUNC_PIN_SEL;
297 psmask = MULTIFUNC_PIN_SEL_MASK;
298 psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB;
299 } else {
300 psreg = CR_OUTPUT_PIN_SEL;
301 psmask = OUTPUT_PIN_SEL_MASK;
302 psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB;
303 }
304
305 /* output pin selection: enable CIR, with WB sensor enabled */
306 val = nvt_cr_read(nvt, psreg);
307 val &= psmask;
308 val |= psval;
309 nvt_cr_write(nvt, val, psreg);
310
311 /* Select CIR logical device and enable */
312 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
313 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
314
315 nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI);
316 nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO);
317
318 nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC);
319
320 nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d",
321 nvt->cir_addr, nvt->cir_irq);
322 }
323
324 static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
325 {
326 /* Select ACPI logical device, enable it and CIR Wake */
327 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
328 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
329
330 /* Enable CIR Wake via PSOUT# (Pin60) */
331 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
332
333 /* enable cir interrupt of mouse/keyboard IRQ event */
334 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
335
336 /* enable pme interrupt of cir wakeup event */
337 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
338
339 /* Select CIR Wake logical device and enable */
340 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
341 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
342
343 nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI);
344 nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO);
345
346 nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
347
348 nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
349 nvt->cir_wake_addr, nvt->cir_wake_irq);
350 }
351
352 /* clear out the hardware's cir rx fifo */
353 static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
354 {
355 u8 val;
356
357 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
358 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
359 }
360
361 /* clear out the hardware's cir wake rx fifo */
362 static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt)
363 {
364 u8 val;
365
366 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON);
367 nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR,
368 CIR_WAKE_FIFOCON);
369 }
370
371 /* clear out the hardware's cir tx fifo */
372 static void nvt_clear_tx_fifo(struct nvt_dev *nvt)
373 {
374 u8 val;
375
376 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
377 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON);
378 }
379
380 /* enable RX Trigger Level Reach and Packet End interrupts */
381 static void nvt_set_cir_iren(struct nvt_dev *nvt)
382 {
383 u8 iren;
384
385 iren = CIR_IREN_RTR | CIR_IREN_PE;
386 nvt_cir_reg_write(nvt, iren, CIR_IREN);
387 }
388
389 static void nvt_cir_regs_init(struct nvt_dev *nvt)
390 {
391 /* set sample limit count (PE interrupt raised when reached) */
392 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH);
393 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL);
394
395 /* set fifo irq trigger levels */
396 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV |
397 CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON);
398
399 /*
400 * Enable TX and RX, specify carrier on = low, off = high, and set
401 * sample period (currently 50us)
402 */
403 nvt_cir_reg_write(nvt,
404 CIR_IRCON_TXEN | CIR_IRCON_RXEN |
405 CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
406 CIR_IRCON);
407
408 /* clear hardware rx and tx fifos */
409 nvt_clear_cir_fifo(nvt);
410 nvt_clear_tx_fifo(nvt);
411
412 /* clear any and all stray interrupts */
413 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
414
415 /* and finally, enable interrupts */
416 nvt_set_cir_iren(nvt);
417 }
418
419 static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
420 {
421 /* set number of bytes needed for wake from s3 (default 65) */
422 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES,
423 CIR_WAKE_FIFO_CMP_DEEP);
424
425 /* set tolerance/variance allowed per byte during wake compare */
426 nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
427 CIR_WAKE_FIFO_CMP_TOL);
428
429 /* set sample limit count (PE interrupt raised when reached) */
430 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH);
431 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL);
432
433 /* set cir wake fifo rx trigger level (currently 67) */
434 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV,
435 CIR_WAKE_FIFOCON);
436
437 /*
438 * Enable TX and RX, specific carrier on = low, off = high, and set
439 * sample period (currently 50us)
440 */
441 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
442 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
443 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
444 CIR_WAKE_IRCON);
445
446 /* clear cir wake rx fifo */
447 nvt_clear_cir_wake_fifo(nvt);
448
449 /* clear any and all stray interrupts */
450 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
451 }
452
453 static void nvt_enable_wake(struct nvt_dev *nvt)
454 {
455 nvt_efm_enable(nvt);
456
457 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
458 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
459 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
460 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
461
462 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
463 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
464
465 nvt_efm_disable(nvt);
466
467 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
468 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
469 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
470 CIR_WAKE_IRCON);
471 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
472 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
473 }
474
475 #if 0 /* Currently unused */
476 /* rx carrier detect only works in learning mode, must be called w/nvt_lock */
477 static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt)
478 {
479 u32 count, carrier, duration = 0;
480 int i;
481
482 count = nvt_cir_reg_read(nvt, CIR_FCCL) |
483 nvt_cir_reg_read(nvt, CIR_FCCH) << 8;
484
485 for (i = 0; i < nvt->pkts; i++) {
486 if (nvt->buf[i] & BUF_PULSE_BIT)
487 duration += nvt->buf[i] & BUF_LEN_MASK;
488 }
489
490 duration *= SAMPLE_PERIOD;
491
492 if (!count || !duration) {
493 nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)",
494 count, duration);
495 return 0;
496 }
497
498 carrier = MS_TO_NS(count) / duration;
499
500 if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER))
501 nvt_dbg("WTF? Carrier frequency out of range!");
502
503 nvt_dbg("Carrier frequency: %u (count %u, duration %u)",
504 carrier, count, duration);
505
506 return carrier;
507 }
508 #endif
509 /*
510 * set carrier frequency
511 *
512 * set carrier on 2 registers: CP & CC
513 * always set CP as 0x81
514 * set CC by SPEC, CC = 3MHz/carrier - 1
515 */
516 static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier)
517 {
518 struct nvt_dev *nvt = dev->priv;
519 u16 val;
520
521 if (carrier == 0)
522 return -EINVAL;
523
524 nvt_cir_reg_write(nvt, 1, CIR_CP);
525 val = 3000000 / (carrier) - 1;
526 nvt_cir_reg_write(nvt, val & 0xff, CIR_CC);
527
528 nvt_dbg("cp: 0x%x cc: 0x%x\n",
529 nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC));
530
531 return 0;
532 }
533
534 /*
535 * nvt_tx_ir
536 *
537 * 1) clean TX fifo first (handled by AP)
538 * 2) copy data from user space
539 * 3) disable RX interrupts, enable TX interrupts: TTR & TFU
540 * 4) send 9 packets to TX FIFO to open TTR
541 * in interrupt_handler:
542 * 5) send all data out
543 * go back to write():
544 * 6) disable TX interrupts, re-enable RX interupts
545 *
546 * The key problem of this function is user space data may larger than
547 * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to
548 * buf, and keep current copied data buf num in cur_buf_num. But driver's buf
549 * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to
550 * set TXFCONT as 0xff, until buf_count less than 0xff.
551 */
552 static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n)
553 {
554 struct nvt_dev *nvt = dev->priv;
555 unsigned long flags;
556 unsigned int i;
557 u8 iren;
558 int ret;
559
560 spin_lock_irqsave(&nvt->tx.lock, flags);
561
562 ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n);
563 nvt->tx.buf_count = (ret * sizeof(unsigned));
564
565 memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count);
566
567 nvt->tx.cur_buf_num = 0;
568
569 /* save currently enabled interrupts */
570 iren = nvt_cir_reg_read(nvt, CIR_IREN);
571
572 /* now disable all interrupts, save TFU & TTR */
573 nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN);
574
575 nvt->tx.tx_state = ST_TX_REPLY;
576
577 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 |
578 CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
579
580 /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */
581 for (i = 0; i < 9; i++)
582 nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO);
583
584 spin_unlock_irqrestore(&nvt->tx.lock, flags);
585
586 wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST);
587
588 spin_lock_irqsave(&nvt->tx.lock, flags);
589 nvt->tx.tx_state = ST_TX_NONE;
590 spin_unlock_irqrestore(&nvt->tx.lock, flags);
591
592 /* restore enabled interrupts to prior state */
593 nvt_cir_reg_write(nvt, iren, CIR_IREN);
594
595 return ret;
596 }
597
598 /* dump contents of the last rx buffer we got from the hw rx fifo */
599 static void nvt_dump_rx_buf(struct nvt_dev *nvt)
600 {
601 int i;
602
603 printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts);
604 for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++)
605 printk(KERN_CONT "0x%02x ", nvt->buf[i]);
606 printk(KERN_CONT "\n");
607 }
608
609 /*
610 * Process raw data in rx driver buffer, store it in raw IR event kfifo,
611 * trigger decode when appropriate.
612 *
613 * We get IR data samples one byte at a time. If the msb is set, its a pulse,
614 * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD
615 * (default 50us) intervals for that pulse/space. A discrete signal is
616 * followed by a series of 0x7f packets, then either 0x7<something> or 0x80
617 * to signal more IR coming (repeats) or end of IR, respectively. We store
618 * sample data in the raw event kfifo until we see 0x7<something> (except f)
619 * or 0x80, at which time, we trigger a decode operation.
620 */
621 static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
622 {
623 DEFINE_IR_RAW_EVENT(rawir);
624 u8 sample;
625 int i;
626
627 nvt_dbg_verbose("%s firing", __func__);
628
629 if (debug)
630 nvt_dump_rx_buf(nvt);
631
632 nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts);
633
634 init_ir_raw_event(&rawir);
635
636 for (i = 0; i < nvt->pkts; i++) {
637 sample = nvt->buf[i];
638
639 rawir.pulse = ((sample & BUF_PULSE_BIT) != 0);
640 rawir.duration = US_TO_NS((sample & BUF_LEN_MASK)
641 * SAMPLE_PERIOD);
642
643 nvt_dbg("Storing %s with duration %d",
644 rawir.pulse ? "pulse" : "space", rawir.duration);
645
646 ir_raw_event_store_with_filter(nvt->rdev, &rawir);
647
648 /*
649 * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE
650 * indicates end of IR signal, but new data incoming. In both
651 * cases, it means we're ready to call ir_raw_event_handle
652 */
653 if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) {
654 nvt_dbg("Calling ir_raw_event_handle (signal end)\n");
655 ir_raw_event_handle(nvt->rdev);
656 }
657 }
658
659 nvt->pkts = 0;
660
661 nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n");
662 ir_raw_event_handle(nvt->rdev);
663
664 nvt_dbg_verbose("%s done", __func__);
665 }
666
667 static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt)
668 {
669 nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!");
670
671 nvt->pkts = 0;
672 nvt_clear_cir_fifo(nvt);
673 ir_raw_event_reset(nvt->rdev);
674 }
675
676 /* copy data from hardware rx fifo into driver buffer */
677 static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
678 {
679 unsigned long flags;
680 u8 fifocount, val;
681 unsigned int b_idx;
682 bool overrun = false;
683 int i;
684
685 /* Get count of how many bytes to read from RX FIFO */
686 fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
687 /* if we get 0xff, probably means the logical dev is disabled */
688 if (fifocount == 0xff)
689 return;
690 /* watch out for a fifo overrun condition */
691 else if (fifocount > RX_BUF_LEN) {
692 overrun = true;
693 fifocount = RX_BUF_LEN;
694 }
695
696 nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
697
698 spin_lock_irqsave(&nvt->nvt_lock, flags);
699
700 b_idx = nvt->pkts;
701
702 /* This should never happen, but lets check anyway... */
703 if (b_idx + fifocount > RX_BUF_LEN) {
704 nvt_process_rx_ir_data(nvt);
705 b_idx = 0;
706 }
707
708 /* Read fifocount bytes from CIR Sample RX FIFO register */
709 for (i = 0; i < fifocount; i++) {
710 val = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
711 nvt->buf[b_idx + i] = val;
712 }
713
714 nvt->pkts += fifocount;
715 nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
716
717 nvt_process_rx_ir_data(nvt);
718
719 if (overrun)
720 nvt_handle_rx_fifo_overrun(nvt);
721
722 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
723 }
724
725 static void nvt_cir_log_irqs(u8 status, u8 iren)
726 {
727 nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s",
728 status, iren,
729 status & CIR_IRSTS_RDR ? " RDR" : "",
730 status & CIR_IRSTS_RTR ? " RTR" : "",
731 status & CIR_IRSTS_PE ? " PE" : "",
732 status & CIR_IRSTS_RFO ? " RFO" : "",
733 status & CIR_IRSTS_TE ? " TE" : "",
734 status & CIR_IRSTS_TTR ? " TTR" : "",
735 status & CIR_IRSTS_TFU ? " TFU" : "",
736 status & CIR_IRSTS_GH ? " GH" : "",
737 status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE |
738 CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR |
739 CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : "");
740 }
741
742 static bool nvt_cir_tx_inactive(struct nvt_dev *nvt)
743 {
744 unsigned long flags;
745 bool tx_inactive;
746 u8 tx_state;
747
748 spin_lock_irqsave(&nvt->tx.lock, flags);
749 tx_state = nvt->tx.tx_state;
750 spin_unlock_irqrestore(&nvt->tx.lock, flags);
751
752 tx_inactive = (tx_state == ST_TX_NONE);
753
754 return tx_inactive;
755 }
756
757 /* interrupt service routine for incoming and outgoing CIR data */
758 static irqreturn_t nvt_cir_isr(int irq, void *data)
759 {
760 struct nvt_dev *nvt = data;
761 u8 status, iren, cur_state;
762 unsigned long flags;
763
764 nvt_dbg_verbose("%s firing", __func__);
765
766 nvt_efm_enable(nvt);
767 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
768 nvt_efm_disable(nvt);
769
770 /*
771 * Get IR Status register contents. Write 1 to ack/clear
772 *
773 * bit: reg name - description
774 * 7: CIR_IRSTS_RDR - RX Data Ready
775 * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach
776 * 5: CIR_IRSTS_PE - Packet End
777 * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set)
778 * 3: CIR_IRSTS_TE - TX FIFO Empty
779 * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach
780 * 1: CIR_IRSTS_TFU - TX FIFO Underrun
781 * 0: CIR_IRSTS_GH - Min Length Detected
782 */
783 status = nvt_cir_reg_read(nvt, CIR_IRSTS);
784 if (!status) {
785 nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__);
786 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
787 return IRQ_RETVAL(IRQ_NONE);
788 }
789
790 /* ack/clear all irq flags we've got */
791 nvt_cir_reg_write(nvt, status, CIR_IRSTS);
792 nvt_cir_reg_write(nvt, 0, CIR_IRSTS);
793
794 /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */
795 iren = nvt_cir_reg_read(nvt, CIR_IREN);
796 if (!iren) {
797 nvt_dbg_verbose("%s exiting, CIR not enabled", __func__);
798 return IRQ_RETVAL(IRQ_NONE);
799 }
800
801 if (debug)
802 nvt_cir_log_irqs(status, iren);
803
804 if (status & CIR_IRSTS_RTR) {
805 /* FIXME: add code for study/learn mode */
806 /* We only do rx if not tx'ing */
807 if (nvt_cir_tx_inactive(nvt))
808 nvt_get_rx_ir_data(nvt);
809 }
810
811 if (status & CIR_IRSTS_PE) {
812 if (nvt_cir_tx_inactive(nvt))
813 nvt_get_rx_ir_data(nvt);
814
815 spin_lock_irqsave(&nvt->nvt_lock, flags);
816
817 cur_state = nvt->study_state;
818
819 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
820
821 if (cur_state == ST_STUDY_NONE)
822 nvt_clear_cir_fifo(nvt);
823 }
824
825 if (status & CIR_IRSTS_TE)
826 nvt_clear_tx_fifo(nvt);
827
828 if (status & CIR_IRSTS_TTR) {
829 unsigned int pos, count;
830 u8 tmp;
831
832 spin_lock_irqsave(&nvt->tx.lock, flags);
833
834 pos = nvt->tx.cur_buf_num;
835 count = nvt->tx.buf_count;
836
837 /* Write data into the hardware tx fifo while pos < count */
838 if (pos < count) {
839 nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO);
840 nvt->tx.cur_buf_num++;
841 /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */
842 } else {
843 tmp = nvt_cir_reg_read(nvt, CIR_IREN);
844 nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN);
845 }
846
847 spin_unlock_irqrestore(&nvt->tx.lock, flags);
848
849 }
850
851 if (status & CIR_IRSTS_TFU) {
852 spin_lock_irqsave(&nvt->tx.lock, flags);
853 if (nvt->tx.tx_state == ST_TX_REPLY) {
854 nvt->tx.tx_state = ST_TX_REQUEST;
855 wake_up(&nvt->tx.queue);
856 }
857 spin_unlock_irqrestore(&nvt->tx.lock, flags);
858 }
859
860 nvt_dbg_verbose("%s done", __func__);
861 return IRQ_RETVAL(IRQ_HANDLED);
862 }
863
864 /* Interrupt service routine for CIR Wake */
865 static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
866 {
867 u8 status, iren, val;
868 struct nvt_dev *nvt = data;
869 unsigned long flags;
870
871 nvt_dbg_wake("%s firing", __func__);
872
873 status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
874 if (!status)
875 return IRQ_RETVAL(IRQ_NONE);
876
877 if (status & CIR_WAKE_IRSTS_IR_PENDING)
878 nvt_clear_cir_wake_fifo(nvt);
879
880 nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
881 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
882
883 /* Interrupt may be shared with CIR, bail if Wake not enabled */
884 iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
885 if (!iren) {
886 nvt_dbg_wake("%s exiting, wake not enabled", __func__);
887 return IRQ_RETVAL(IRQ_HANDLED);
888 }
889
890 if ((status & CIR_WAKE_IRSTS_PE) &&
891 (nvt->wake_state == ST_WAKE_START)) {
892 while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
893 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
894 nvt_dbg("setting wake up key: 0x%x", val);
895 }
896
897 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
898 spin_lock_irqsave(&nvt->nvt_lock, flags);
899 nvt->wake_state = ST_WAKE_FINISH;
900 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
901 }
902
903 nvt_dbg_wake("%s done", __func__);
904 return IRQ_RETVAL(IRQ_HANDLED);
905 }
906
907 static void nvt_enable_cir(struct nvt_dev *nvt)
908 {
909 /* set function enable flags */
910 nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
911 CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
912 CIR_IRCON);
913
914 nvt_efm_enable(nvt);
915
916 /* enable the CIR logical device */
917 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
918 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
919
920 nvt_efm_disable(nvt);
921
922 /* clear all pending interrupts */
923 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
924
925 /* enable interrupts */
926 nvt_set_cir_iren(nvt);
927 }
928
929 static void nvt_disable_cir(struct nvt_dev *nvt)
930 {
931 /* disable CIR interrupts */
932 nvt_cir_reg_write(nvt, 0, CIR_IREN);
933
934 /* clear any and all pending interrupts */
935 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
936
937 /* clear all function enable flags */
938 nvt_cir_reg_write(nvt, 0, CIR_IRCON);
939
940 /* clear hardware rx and tx fifos */
941 nvt_clear_cir_fifo(nvt);
942 nvt_clear_tx_fifo(nvt);
943
944 nvt_efm_enable(nvt);
945
946 /* disable the CIR logical device */
947 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
948 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
949
950 nvt_efm_disable(nvt);
951 }
952
953 static int nvt_open(struct rc_dev *dev)
954 {
955 struct nvt_dev *nvt = dev->priv;
956 unsigned long flags;
957
958 spin_lock_irqsave(&nvt->nvt_lock, flags);
959 nvt_enable_cir(nvt);
960 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
961
962 return 0;
963 }
964
965 static void nvt_close(struct rc_dev *dev)
966 {
967 struct nvt_dev *nvt = dev->priv;
968 unsigned long flags;
969
970 spin_lock_irqsave(&nvt->nvt_lock, flags);
971 nvt_disable_cir(nvt);
972 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
973 }
974
975 /* Allocate memory, probe hardware, and initialize everything */
976 static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
977 {
978 struct nvt_dev *nvt;
979 struct rc_dev *rdev;
980 int ret = -ENOMEM;
981
982 nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL);
983 if (!nvt)
984 return ret;
985
986 /* input device for IR remote (and tx) */
987 rdev = rc_allocate_device();
988 if (!rdev)
989 goto exit_free_dev_rdev;
990
991 ret = -ENODEV;
992 /* validate pnp resources */
993 if (!pnp_port_valid(pdev, 0) ||
994 pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) {
995 dev_err(&pdev->dev, "IR PNP Port not valid!\n");
996 goto exit_free_dev_rdev;
997 }
998
999 if (!pnp_irq_valid(pdev, 0)) {
1000 dev_err(&pdev->dev, "PNP IRQ not valid!\n");
1001 goto exit_free_dev_rdev;
1002 }
1003
1004 if (!pnp_port_valid(pdev, 1) ||
1005 pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) {
1006 dev_err(&pdev->dev, "Wake PNP Port not valid!\n");
1007 goto exit_free_dev_rdev;
1008 }
1009
1010 nvt->cir_addr = pnp_port_start(pdev, 0);
1011 nvt->cir_irq = pnp_irq(pdev, 0);
1012
1013 nvt->cir_wake_addr = pnp_port_start(pdev, 1);
1014 /* irq is always shared between cir and cir wake */
1015 nvt->cir_wake_irq = nvt->cir_irq;
1016
1017 nvt->cr_efir = CR_EFIR;
1018 nvt->cr_efdr = CR_EFDR;
1019
1020 spin_lock_init(&nvt->nvt_lock);
1021 spin_lock_init(&nvt->tx.lock);
1022
1023 pnp_set_drvdata(pdev, nvt);
1024 nvt->pdev = pdev;
1025
1026 init_waitqueue_head(&nvt->tx.queue);
1027
1028 ret = nvt_hw_detect(nvt);
1029 if (ret)
1030 goto exit_free_dev_rdev;
1031
1032 /* Initialize CIR & CIR Wake Logical Devices */
1033 nvt_efm_enable(nvt);
1034 nvt_cir_ldev_init(nvt);
1035 nvt_cir_wake_ldev_init(nvt);
1036 nvt_efm_disable(nvt);
1037
1038 /* Initialize CIR & CIR Wake Config Registers */
1039 nvt_cir_regs_init(nvt);
1040 nvt_cir_wake_regs_init(nvt);
1041
1042 /* Set up the rc device */
1043 rdev->priv = nvt;
1044 rdev->driver_type = RC_DRIVER_IR_RAW;
1045 rdev->allowed_protos = RC_BIT_ALL;
1046 rdev->open = nvt_open;
1047 rdev->close = nvt_close;
1048 rdev->tx_ir = nvt_tx_ir;
1049 rdev->s_tx_carrier = nvt_set_tx_carrier;
1050 rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver";
1051 rdev->input_phys = "nuvoton/cir0";
1052 rdev->input_id.bustype = BUS_HOST;
1053 rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2;
1054 rdev->input_id.product = nvt->chip_major;
1055 rdev->input_id.version = nvt->chip_minor;
1056 rdev->dev.parent = &pdev->dev;
1057 rdev->driver_name = NVT_DRIVER_NAME;
1058 rdev->map_name = RC_MAP_RC6_MCE;
1059 rdev->timeout = MS_TO_NS(100);
1060 /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */
1061 rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD);
1062 #if 0
1063 rdev->min_timeout = XYZ;
1064 rdev->max_timeout = XYZ;
1065 /* tx bits */
1066 rdev->tx_resolution = XYZ;
1067 #endif
1068 nvt->rdev = rdev;
1069
1070 ret = rc_register_device(rdev);
1071 if (ret)
1072 goto exit_free_dev_rdev;
1073
1074 ret = -EBUSY;
1075 /* now claim resources */
1076 if (!request_region(nvt->cir_addr,
1077 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
1078 goto exit_unregister_device;
1079
1080 if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
1081 NVT_DRIVER_NAME, (void *)nvt))
1082 goto exit_release_cir_addr;
1083
1084 if (!request_region(nvt->cir_wake_addr,
1085 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
1086 goto exit_free_irq;
1087
1088 if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
1089 NVT_DRIVER_NAME, (void *)nvt))
1090 goto exit_release_cir_wake_addr;
1091
1092 device_init_wakeup(&pdev->dev, true);
1093
1094 nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n");
1095 if (debug) {
1096 cir_dump_regs(nvt);
1097 cir_wake_dump_regs(nvt);
1098 }
1099
1100 return 0;
1101
1102 exit_release_cir_wake_addr:
1103 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1104 exit_free_irq:
1105 free_irq(nvt->cir_irq, nvt);
1106 exit_release_cir_addr:
1107 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1108 exit_unregister_device:
1109 rc_unregister_device(rdev);
1110 rdev = NULL;
1111 exit_free_dev_rdev:
1112 rc_free_device(rdev);
1113 kfree(nvt);
1114
1115 return ret;
1116 }
1117
1118 static void nvt_remove(struct pnp_dev *pdev)
1119 {
1120 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1121 unsigned long flags;
1122
1123 spin_lock_irqsave(&nvt->nvt_lock, flags);
1124 /* disable CIR */
1125 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1126 nvt_disable_cir(nvt);
1127 /* enable CIR Wake (for IR power-on) */
1128 nvt_enable_wake(nvt);
1129 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1130
1131 /* free resources */
1132 free_irq(nvt->cir_irq, nvt);
1133 free_irq(nvt->cir_wake_irq, nvt);
1134 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1135 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1136
1137 rc_unregister_device(nvt->rdev);
1138
1139 kfree(nvt);
1140 }
1141
1142 static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
1143 {
1144 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1145 unsigned long flags;
1146
1147 nvt_dbg("%s called", __func__);
1148
1149 /* zero out misc state tracking */
1150 spin_lock_irqsave(&nvt->nvt_lock, flags);
1151 nvt->study_state = ST_STUDY_NONE;
1152 nvt->wake_state = ST_WAKE_NONE;
1153 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1154
1155 spin_lock_irqsave(&nvt->tx.lock, flags);
1156 nvt->tx.tx_state = ST_TX_NONE;
1157 spin_unlock_irqrestore(&nvt->tx.lock, flags);
1158
1159 /* disable all CIR interrupts */
1160 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1161
1162 nvt_efm_enable(nvt);
1163
1164 /* disable cir logical dev */
1165 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1166 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
1167
1168 nvt_efm_disable(nvt);
1169
1170 /* make sure wake is enabled */
1171 nvt_enable_wake(nvt);
1172
1173 return 0;
1174 }
1175
1176 static int nvt_resume(struct pnp_dev *pdev)
1177 {
1178 int ret = 0;
1179 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1180
1181 nvt_dbg("%s called", __func__);
1182
1183 /* open interrupt */
1184 nvt_set_cir_iren(nvt);
1185
1186 /* Enable CIR logical device */
1187 nvt_efm_enable(nvt);
1188 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1189 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
1190
1191 nvt_efm_disable(nvt);
1192
1193 nvt_cir_regs_init(nvt);
1194 nvt_cir_wake_regs_init(nvt);
1195
1196 return ret;
1197 }
1198
1199 static void nvt_shutdown(struct pnp_dev *pdev)
1200 {
1201 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1202 nvt_enable_wake(nvt);
1203 }
1204
1205 static const struct pnp_device_id nvt_ids[] = {
1206 { "WEC0530", 0 }, /* CIR */
1207 { "NTN0530", 0 }, /* CIR for new chip's pnp id*/
1208 { "", 0 },
1209 };
1210
1211 static struct pnp_driver nvt_driver = {
1212 .name = NVT_DRIVER_NAME,
1213 .id_table = nvt_ids,
1214 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1215 .probe = nvt_probe,
1216 .remove = nvt_remove,
1217 .suspend = nvt_suspend,
1218 .resume = nvt_resume,
1219 .shutdown = nvt_shutdown,
1220 };
1221
1222 static int nvt_init(void)
1223 {
1224 return pnp_register_driver(&nvt_driver);
1225 }
1226
1227 static void nvt_exit(void)
1228 {
1229 pnp_unregister_driver(&nvt_driver);
1230 }
1231
1232 module_param(debug, int, S_IRUGO | S_IWUSR);
1233 MODULE_PARM_DESC(debug, "Enable debugging output");
1234
1235 MODULE_DEVICE_TABLE(pnp, nvt_ids);
1236 MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver");
1237
1238 MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
1239 MODULE_LICENSE("GPL");
1240
1241 module_init(nvt_init);
1242 module_exit(nvt_exit);
CRIS linux kernel tree