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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / media / rc / nuvoton-cir.c
blob8b2c071ac0ab67d86cfb1ea8120435e5df23406f
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 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pnp.h>
31 #include <linux/io.h>
32 #include <linux/interrupt.h>
33 #include <linux/sched.h>
34 #include <linux/slab.h>
35 #include <media/rc-core.h>
36 #include <linux/pci_ids.h>
37
38 #include "nuvoton-cir.h"
39
40 /* write val to config reg */
41 static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg)
42 {
43 outb(reg, nvt->cr_efir);
44 outb(val, nvt->cr_efdr);
45 }
46
47 /* read val from config reg */
48 static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg)
49 {
50 outb(reg, nvt->cr_efir);
51 return inb(nvt->cr_efdr);
52 }
53
54 /* update config register bit without changing other bits */
55 static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
56 {
57 u8 tmp = nvt_cr_read(nvt, reg) | val;
58 nvt_cr_write(nvt, tmp, reg);
59 }
60
61 /* clear config register bit without changing other bits */
62 static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
63 {
64 u8 tmp = nvt_cr_read(nvt, reg) & ~val;
65 nvt_cr_write(nvt, tmp, reg);
66 }
67
68 /* enter extended function mode */
69 static inline void nvt_efm_enable(struct nvt_dev *nvt)
70 {
71 /* Enabling Extended Function Mode explicitly requires writing 2x */
72 outb(EFER_EFM_ENABLE, nvt->cr_efir);
73 outb(EFER_EFM_ENABLE, nvt->cr_efir);
74 }
75
76 /* exit extended function mode */
77 static inline void nvt_efm_disable(struct nvt_dev *nvt)
78 {
79 outb(EFER_EFM_DISABLE, nvt->cr_efir);
80 }
81
82 /*
83 * When you want to address a specific logical device, write its logical
84 * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing
85 * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN.
86 */
87 static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev)
88 {
89 outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir);
90 outb(ldev, nvt->cr_efdr);
91 }
92
93 /* write val to cir config register */
94 static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset)
95 {
96 outb(val, nvt->cir_addr + offset);
97 }
98
99 /* read val from cir config register */
100 static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset)
101 {
102 u8 val;
103
104 val = inb(nvt->cir_addr + offset);
105
106 return val;
107 }
108
109 /* write val to cir wake register */
110 static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt,
111 u8 val, u8 offset)
112 {
113 outb(val, nvt->cir_wake_addr + offset);
114 }
115
116 /* read val from cir wake config register */
117 static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
118 {
119 u8 val;
120
121 val = inb(nvt->cir_wake_addr + offset);
122
123 return val;
124 }
125
126 #define pr_reg(text, ...) \
127 printk(KERN_INFO KBUILD_MODNAME ": " text, ## __VA_ARGS__)
128
129 /* dump current cir register contents */
130 static void cir_dump_regs(struct nvt_dev *nvt)
131 {
132 nvt_efm_enable(nvt);
133 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
134
135 pr_reg("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
136 pr_reg(" * CR CIR ACTIVE : 0x%x\n",
137 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
138 pr_reg(" * CR CIR BASE ADDR: 0x%x\n",
139 (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
140 nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
141 pr_reg(" * CR CIR IRQ NUM: 0x%x\n",
142 nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
143
144 nvt_efm_disable(nvt);
145
146 pr_reg("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
147 pr_reg(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
148 pr_reg(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
149 pr_reg(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
150 pr_reg(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
151 pr_reg(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
152 pr_reg(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
153 pr_reg(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
154 pr_reg(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
155 pr_reg(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
156 pr_reg(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
157 pr_reg(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
158 pr_reg(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
159 pr_reg(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
160 pr_reg(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
161 pr_reg(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
162 pr_reg(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
163 }
164
165 /* dump current cir wake register contents */
166 static void cir_wake_dump_regs(struct nvt_dev *nvt)
167 {
168 u8 i, fifo_len;
169
170 nvt_efm_enable(nvt);
171 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
172
173 pr_reg("%s: Dump CIR WAKE logical device registers:\n",
174 NVT_DRIVER_NAME);
175 pr_reg(" * CR CIR WAKE ACTIVE : 0x%x\n",
176 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
177 pr_reg(" * CR CIR WAKE BASE ADDR: 0x%x\n",
178 (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
179 nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
180 pr_reg(" * CR CIR WAKE IRQ NUM: 0x%x\n",
181 nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
182
183 nvt_efm_disable(nvt);
184
185 pr_reg("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
186 pr_reg(" * IRCON: 0x%x\n",
187 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
188 pr_reg(" * IRSTS: 0x%x\n",
189 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
190 pr_reg(" * IREN: 0x%x\n",
191 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
192 pr_reg(" * FIFO CMP DEEP: 0x%x\n",
193 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
194 pr_reg(" * FIFO CMP TOL: 0x%x\n",
195 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
196 pr_reg(" * FIFO COUNT: 0x%x\n",
197 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
198 pr_reg(" * SLCH: 0x%x\n",
199 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
200 pr_reg(" * SLCL: 0x%x\n",
201 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
202 pr_reg(" * FIFOCON: 0x%x\n",
203 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
204 pr_reg(" * SRXFSTS: 0x%x\n",
205 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
206 pr_reg(" * SAMPLE RX FIFO: 0x%x\n",
207 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
208 pr_reg(" * WR FIFO DATA: 0x%x\n",
209 nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
210 pr_reg(" * RD FIFO ONLY: 0x%x\n",
211 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
212 pr_reg(" * RD FIFO ONLY IDX: 0x%x\n",
213 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
214 pr_reg(" * FIFO IGNORE: 0x%x\n",
215 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
216 pr_reg(" * IRFSM: 0x%x\n",
217 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM));
218
219 fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
220 pr_reg("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
221 pr_reg("* Contents = ");
222 for (i = 0; i < fifo_len; i++)
223 printk(KERN_CONT "%02x ",
224 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
225 printk(KERN_CONT "\n");
226 }
227
228 /* detect hardware features */
229 static int nvt_hw_detect(struct nvt_dev *nvt)
230 {
231 unsigned long flags;
232 u8 chip_major, chip_minor;
233 int ret = 0;
234 char chip_id[12];
235 bool chip_unknown = false;
236
237 nvt_efm_enable(nvt);
238
239 /* Check if we're wired for the alternate EFER setup */
240 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
241 if (chip_major == 0xff) {
242 nvt->cr_efir = CR_EFIR2;
243 nvt->cr_efdr = CR_EFDR2;
244 nvt_efm_enable(nvt);
245 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
246 }
247
248 chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO);
249
250 /* these are the known working chip revisions... */
251 switch (chip_major) {
252 case CHIP_ID_HIGH_667:
253 strcpy(chip_id, "w83667hg\0");
254 if (chip_minor != CHIP_ID_LOW_667)
255 chip_unknown = true;
256 break;
257 case CHIP_ID_HIGH_677B:
258 strcpy(chip_id, "w83677hg\0");
259 if (chip_minor != CHIP_ID_LOW_677B2 &&
260 chip_minor != CHIP_ID_LOW_677B3)
261 chip_unknown = true;
262 break;
263 case CHIP_ID_HIGH_677C:
264 strcpy(chip_id, "w83677hg-c\0");
265 if (chip_minor != CHIP_ID_LOW_677C)
266 chip_unknown = true;
267 break;
268 default:
269 strcpy(chip_id, "w836x7hg\0");
270 chip_unknown = true;
271 break;
272 }
273
274 /* warn, but still let the driver load, if we don't know this chip */
275 if (chip_unknown)
276 nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, "
277 "it may not work...", chip_id, chip_major, chip_minor);
278 else
279 nvt_dbg("%s: chip id: 0x%02x 0x%02x",
280 chip_id, chip_major, chip_minor);
281
282 nvt_efm_disable(nvt);
283
284 spin_lock_irqsave(&nvt->nvt_lock, flags);
285 nvt->chip_major = chip_major;
286 nvt->chip_minor = chip_minor;
287 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
288
289 return ret;
290 }
291
292 static void nvt_cir_ldev_init(struct nvt_dev *nvt)
293 {
294 u8 val, psreg, psmask, psval;
295
296 if (nvt->chip_major == CHIP_ID_HIGH_667) {
297 psreg = CR_MULTIFUNC_PIN_SEL;
298 psmask = MULTIFUNC_PIN_SEL_MASK;
299 psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB;
300 } else {
301 psreg = CR_OUTPUT_PIN_SEL;
302 psmask = OUTPUT_PIN_SEL_MASK;
303 psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB;
304 }
305
306 /* output pin selection: enable CIR, with WB sensor enabled */
307 val = nvt_cr_read(nvt, psreg);
308 val &= psmask;
309 val |= psval;
310 nvt_cr_write(nvt, val, psreg);
311
312 /* Select CIR logical device and enable */
313 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
314 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
315
316 nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI);
317 nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO);
318
319 nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC);
320
321 nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d",
322 nvt->cir_addr, nvt->cir_irq);
323 }
324
325 static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
326 {
327 /* Select ACPI logical device, enable it and CIR Wake */
328 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
329 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
330
331 /* Enable CIR Wake via PSOUT# (Pin60) */
332 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
333
334 /* enable cir interrupt of mouse/keyboard IRQ event */
335 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
336
337 /* enable pme interrupt of cir wakeup event */
338 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
339
340 /* Select CIR Wake logical device and enable */
341 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
342 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
343
344 nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI);
345 nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO);
346
347 nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
348
349 nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
350 nvt->cir_wake_addr, nvt->cir_wake_irq);
351 }
352
353 /* clear out the hardware's cir rx fifo */
354 static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
355 {
356 u8 val;
357
358 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
359 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
360 }
361
362 /* clear out the hardware's cir wake rx fifo */
363 static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt)
364 {
365 u8 val;
366
367 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON);
368 nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR,
369 CIR_WAKE_FIFOCON);
370 }
371
372 /* clear out the hardware's cir tx fifo */
373 static void nvt_clear_tx_fifo(struct nvt_dev *nvt)
374 {
375 u8 val;
376
377 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
378 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON);
379 }
380
381 /* enable RX Trigger Level Reach and Packet End interrupts */
382 static void nvt_set_cir_iren(struct nvt_dev *nvt)
383 {
384 u8 iren;
385
386 iren = CIR_IREN_RTR | CIR_IREN_PE;
387 nvt_cir_reg_write(nvt, iren, CIR_IREN);
388 }
389
390 static void nvt_cir_regs_init(struct nvt_dev *nvt)
391 {
392 /* set sample limit count (PE interrupt raised when reached) */
393 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH);
394 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL);
395
396 /* set fifo irq trigger levels */
397 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV |
398 CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON);
399
400 /*
401 * Enable TX and RX, specify carrier on = low, off = high, and set
402 * sample period (currently 50us)
403 */
404 nvt_cir_reg_write(nvt,
405 CIR_IRCON_TXEN | CIR_IRCON_RXEN |
406 CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
407 CIR_IRCON);
408
409 /* clear hardware rx and tx fifos */
410 nvt_clear_cir_fifo(nvt);
411 nvt_clear_tx_fifo(nvt);
412
413 /* clear any and all stray interrupts */
414 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
415
416 /* and finally, enable interrupts */
417 nvt_set_cir_iren(nvt);
418 }
419
420 static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
421 {
422 /* set number of bytes needed for wake from s3 (default 65) */
423 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES,
424 CIR_WAKE_FIFO_CMP_DEEP);
425
426 /* set tolerance/variance allowed per byte during wake compare */
427 nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
428 CIR_WAKE_FIFO_CMP_TOL);
429
430 /* set sample limit count (PE interrupt raised when reached) */
431 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH);
432 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL);
433
434 /* set cir wake fifo rx trigger level (currently 67) */
435 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV,
436 CIR_WAKE_FIFOCON);
437
438 /*
439 * Enable TX and RX, specific carrier on = low, off = high, and set
440 * sample period (currently 50us)
441 */
442 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
443 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
444 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
445 CIR_WAKE_IRCON);
446
447 /* clear cir wake rx fifo */
448 nvt_clear_cir_wake_fifo(nvt);
449
450 /* clear any and all stray interrupts */
451 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
452 }
453
454 static void nvt_enable_wake(struct nvt_dev *nvt)
455 {
456 nvt_efm_enable(nvt);
457
458 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
459 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
460 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
461 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
462
463 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
464 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
465
466 nvt_efm_disable(nvt);
467
468 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
469 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
470 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
471 CIR_WAKE_IRCON);
472 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
473 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
474 }
475
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
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 nvt_cir_reg_write(nvt, 1, CIR_CP);
522 val = 3000000 / (carrier) - 1;
523 nvt_cir_reg_write(nvt, val & 0xff, CIR_CC);
524
525 nvt_dbg("cp: 0x%x cc: 0x%x\n",
526 nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC));
527
528 return 0;
529 }
530
531 /*
532 * nvt_tx_ir
533 *
534 * 1) clean TX fifo first (handled by AP)
535 * 2) copy data from user space
536 * 3) disable RX interrupts, enable TX interrupts: TTR & TFU
537 * 4) send 9 packets to TX FIFO to open TTR
538 * in interrupt_handler:
539 * 5) send all data out
540 * go back to write():
541 * 6) disable TX interrupts, re-enable RX interupts
542 *
543 * The key problem of this function is user space data may larger than
544 * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to
545 * buf, and keep current copied data buf num in cur_buf_num. But driver's buf
546 * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to
547 * set TXFCONT as 0xff, until buf_count less than 0xff.
548 */
549 static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n)
550 {
551 struct nvt_dev *nvt = dev->priv;
552 unsigned long flags;
553 unsigned int i;
554 u8 iren;
555 int ret;
556
557 spin_lock_irqsave(&nvt->tx.lock, flags);
558
559 ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n);
560 nvt->tx.buf_count = (ret * sizeof(unsigned));
561
562 memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count);
563
564 nvt->tx.cur_buf_num = 0;
565
566 /* save currently enabled interrupts */
567 iren = nvt_cir_reg_read(nvt, CIR_IREN);
568
569 /* now disable all interrupts, save TFU & TTR */
570 nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN);
571
572 nvt->tx.tx_state = ST_TX_REPLY;
573
574 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 |
575 CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
576
577 /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */
578 for (i = 0; i < 9; i++)
579 nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO);
580
581 spin_unlock_irqrestore(&nvt->tx.lock, flags);
582
583 wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST);
584
585 spin_lock_irqsave(&nvt->tx.lock, flags);
586 nvt->tx.tx_state = ST_TX_NONE;
587 spin_unlock_irqrestore(&nvt->tx.lock, flags);
588
589 /* restore enabled interrupts to prior state */
590 nvt_cir_reg_write(nvt, iren, CIR_IREN);
591
592 return ret;
593 }
594
595 /* dump contents of the last rx buffer we got from the hw rx fifo */
596 static void nvt_dump_rx_buf(struct nvt_dev *nvt)
597 {
598 int i;
599
600 printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts);
601 for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++)
602 printk(KERN_CONT "0x%02x ", nvt->buf[i]);
603 printk(KERN_CONT "\n");
604 }
605
606 /*
607 * Process raw data in rx driver buffer, store it in raw IR event kfifo,
608 * trigger decode when appropriate.
609 *
610 * We get IR data samples one byte at a time. If the msb is set, its a pulse,
611 * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD
612 * (default 50us) intervals for that pulse/space. A discrete signal is
613 * followed by a series of 0x7f packets, then either 0x7<something> or 0x80
614 * to signal more IR coming (repeats) or end of IR, respectively. We store
615 * sample data in the raw event kfifo until we see 0x7<something> (except f)
616 * or 0x80, at which time, we trigger a decode operation.
617 */
618 static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
619 {
620 DEFINE_IR_RAW_EVENT(rawir);
621 u32 carrier;
622 u8 sample;
623 int i;
624
625 nvt_dbg_verbose("%s firing", __func__);
626
627 if (debug)
628 nvt_dump_rx_buf(nvt);
629
630 if (nvt->carrier_detect_enabled)
631 carrier = nvt_rx_carrier_detect(nvt);
632
633 nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts);
634
635 init_ir_raw_event(&rawir);
636
637 for (i = 0; i < nvt->pkts; i++) {
638 sample = nvt->buf[i];
639
640 rawir.pulse = ((sample & BUF_PULSE_BIT) != 0);
641 rawir.duration = US_TO_NS((sample & BUF_LEN_MASK)
642 * SAMPLE_PERIOD);
643
644 nvt_dbg("Storing %s with duration %d",
645 rawir.pulse ? "pulse" : "space", rawir.duration);
646
647 ir_raw_event_store_with_filter(nvt->rdev, &rawir);
648
649 /*
650 * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE
651 * indicates end of IR signal, but new data incoming. In both
652 * cases, it means we're ready to call ir_raw_event_handle
653 */
654 if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) {
655 nvt_dbg("Calling ir_raw_event_handle (signal end)\n");
656 ir_raw_event_handle(nvt->rdev);
657 }
658 }
659
660 nvt->pkts = 0;
661
662 nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n");
663 ir_raw_event_handle(nvt->rdev);
664
665 nvt_dbg_verbose("%s done", __func__);
666 }
667
668 static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt)
669 {
670 nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!");
671
672 nvt->pkts = 0;
673 nvt_clear_cir_fifo(nvt);
674 ir_raw_event_reset(nvt->rdev);
675 }
676
677 /* copy data from hardware rx fifo into driver buffer */
678 static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
679 {
680 unsigned long flags;
681 u8 fifocount, val;
682 unsigned int b_idx;
683 bool overrun = false;
684 int i;
685
686 /* Get count of how many bytes to read from RX FIFO */
687 fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
688 /* if we get 0xff, probably means the logical dev is disabled */
689 if (fifocount == 0xff)
690 return;
691 /* watch out for a fifo overrun condition */
692 else if (fifocount > RX_BUF_LEN) {
693 overrun = true;
694 fifocount = RX_BUF_LEN;
695 }
696
697 nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
698
699 spin_lock_irqsave(&nvt->nvt_lock, flags);
700
701 b_idx = nvt->pkts;
702
703 /* This should never happen, but lets check anyway... */
704 if (b_idx + fifocount > RX_BUF_LEN) {
705 nvt_process_rx_ir_data(nvt);
706 b_idx = 0;
707 }
708
709 /* Read fifocount bytes from CIR Sample RX FIFO register */
710 for (i = 0; i < fifocount; i++) {
711 val = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
712 nvt->buf[b_idx + i] = val;
713 }
714
715 nvt->pkts += fifocount;
716 nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
717
718 nvt_process_rx_ir_data(nvt);
719
720 if (overrun)
721 nvt_handle_rx_fifo_overrun(nvt);
722
723 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
724 }
725
726 static void nvt_cir_log_irqs(u8 status, u8 iren)
727 {
728 nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s",
729 status, iren,
730 status & CIR_IRSTS_RDR ? " RDR" : "",
731 status & CIR_IRSTS_RTR ? " RTR" : "",
732 status & CIR_IRSTS_PE ? " PE" : "",
733 status & CIR_IRSTS_RFO ? " RFO" : "",
734 status & CIR_IRSTS_TE ? " TE" : "",
735 status & CIR_IRSTS_TTR ? " TTR" : "",
736 status & CIR_IRSTS_TFU ? " TFU" : "",
737 status & CIR_IRSTS_GH ? " GH" : "",
738 status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE |
739 CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR |
740 CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : "");
741 }
742
743 static bool nvt_cir_tx_inactive(struct nvt_dev *nvt)
744 {
745 unsigned long flags;
746 bool tx_inactive;
747 u8 tx_state;
748
749 spin_lock_irqsave(&nvt->tx.lock, flags);
750 tx_state = nvt->tx.tx_state;
751 spin_unlock_irqrestore(&nvt->tx.lock, flags);
752
753 tx_inactive = (tx_state == ST_TX_NONE);
754
755 return tx_inactive;
756 }
757
758 /* interrupt service routine for incoming and outgoing CIR data */
759 static irqreturn_t nvt_cir_isr(int irq, void *data)
760 {
761 struct nvt_dev *nvt = data;
762 u8 status, iren, cur_state;
763 unsigned long flags;
764
765 nvt_dbg_verbose("%s firing", __func__);
766
767 nvt_efm_enable(nvt);
768 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
769 nvt_efm_disable(nvt);
770
771 /*
772 * Get IR Status register contents. Write 1 to ack/clear
773 *
774 * bit: reg name - description
775 * 7: CIR_IRSTS_RDR - RX Data Ready
776 * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach
777 * 5: CIR_IRSTS_PE - Packet End
778 * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set)
779 * 3: CIR_IRSTS_TE - TX FIFO Empty
780 * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach
781 * 1: CIR_IRSTS_TFU - TX FIFO Underrun
782 * 0: CIR_IRSTS_GH - Min Length Detected
783 */
784 status = nvt_cir_reg_read(nvt, CIR_IRSTS);
785 if (!status) {
786 nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__);
787 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
788 return IRQ_RETVAL(IRQ_NONE);
789 }
790
791 /* ack/clear all irq flags we've got */
792 nvt_cir_reg_write(nvt, status, CIR_IRSTS);
793 nvt_cir_reg_write(nvt, 0, CIR_IRSTS);
794
795 /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */
796 iren = nvt_cir_reg_read(nvt, CIR_IREN);
797 if (!iren) {
798 nvt_dbg_verbose("%s exiting, CIR not enabled", __func__);
799 return IRQ_RETVAL(IRQ_NONE);
800 }
801
802 if (debug)
803 nvt_cir_log_irqs(status, iren);
804
805 if (status & CIR_IRSTS_RTR) {
806 /* FIXME: add code for study/learn mode */
807 /* We only do rx if not tx'ing */
808 if (nvt_cir_tx_inactive(nvt))
809 nvt_get_rx_ir_data(nvt);
810 }
811
812 if (status & CIR_IRSTS_PE) {
813 if (nvt_cir_tx_inactive(nvt))
814 nvt_get_rx_ir_data(nvt);
815
816 spin_lock_irqsave(&nvt->nvt_lock, flags);
817
818 cur_state = nvt->study_state;
819
820 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
821
822 if (cur_state == ST_STUDY_NONE)
823 nvt_clear_cir_fifo(nvt);
824 }
825
826 if (status & CIR_IRSTS_TE)
827 nvt_clear_tx_fifo(nvt);
828
829 if (status & CIR_IRSTS_TTR) {
830 unsigned int pos, count;
831 u8 tmp;
832
833 spin_lock_irqsave(&nvt->tx.lock, flags);
834
835 pos = nvt->tx.cur_buf_num;
836 count = nvt->tx.buf_count;
837
838 /* Write data into the hardware tx fifo while pos < count */
839 if (pos < count) {
840 nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO);
841 nvt->tx.cur_buf_num++;
842 /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */
843 } else {
844 tmp = nvt_cir_reg_read(nvt, CIR_IREN);
845 nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN);
846 }
847
848 spin_unlock_irqrestore(&nvt->tx.lock, flags);
849
850 }
851
852 if (status & CIR_IRSTS_TFU) {
853 spin_lock_irqsave(&nvt->tx.lock, flags);
854 if (nvt->tx.tx_state == ST_TX_REPLY) {
855 nvt->tx.tx_state = ST_TX_REQUEST;
856 wake_up(&nvt->tx.queue);
857 }
858 spin_unlock_irqrestore(&nvt->tx.lock, flags);
859 }
860
861 nvt_dbg_verbose("%s done", __func__);
862 return IRQ_RETVAL(IRQ_HANDLED);
863 }
864
865 /* Interrupt service routine for CIR Wake */
866 static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
867 {
868 u8 status, iren, val;
869 struct nvt_dev *nvt = data;
870 unsigned long flags;
871
872 nvt_dbg_wake("%s firing", __func__);
873
874 status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
875 if (!status)
876 return IRQ_RETVAL(IRQ_NONE);
877
878 if (status & CIR_WAKE_IRSTS_IR_PENDING)
879 nvt_clear_cir_wake_fifo(nvt);
880
881 nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
882 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
883
884 /* Interrupt may be shared with CIR, bail if Wake not enabled */
885 iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
886 if (!iren) {
887 nvt_dbg_wake("%s exiting, wake not enabled", __func__);
888 return IRQ_RETVAL(IRQ_HANDLED);
889 }
890
891 if ((status & CIR_WAKE_IRSTS_PE) &&
892 (nvt->wake_state == ST_WAKE_START)) {
893 while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
894 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
895 nvt_dbg("setting wake up key: 0x%x", val);
896 }
897
898 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
899 spin_lock_irqsave(&nvt->nvt_lock, flags);
900 nvt->wake_state = ST_WAKE_FINISH;
901 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
902 }
903
904 nvt_dbg_wake("%s done", __func__);
905 return IRQ_RETVAL(IRQ_HANDLED);
906 }
907
908 static void nvt_enable_cir(struct nvt_dev *nvt)
909 {
910 /* set function enable flags */
911 nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
912 CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
913 CIR_IRCON);
914
915 nvt_efm_enable(nvt);
916
917 /* enable the CIR logical device */
918 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
919 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
920
921 nvt_efm_disable(nvt);
922
923 /* clear all pending interrupts */
924 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
925
926 /* enable interrupts */
927 nvt_set_cir_iren(nvt);
928 }
929
930 static void nvt_disable_cir(struct nvt_dev *nvt)
931 {
932 /* disable CIR interrupts */
933 nvt_cir_reg_write(nvt, 0, CIR_IREN);
934
935 /* clear any and all pending interrupts */
936 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
937
938 /* clear all function enable flags */
939 nvt_cir_reg_write(nvt, 0, CIR_IRCON);
940
941 /* clear hardware rx and tx fifos */
942 nvt_clear_cir_fifo(nvt);
943 nvt_clear_tx_fifo(nvt);
944
945 nvt_efm_enable(nvt);
946
947 /* disable the CIR logical device */
948 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
949 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
950
951 nvt_efm_disable(nvt);
952 }
953
954 static int nvt_open(struct rc_dev *dev)
955 {
956 struct nvt_dev *nvt = dev->priv;
957 unsigned long flags;
958
959 spin_lock_irqsave(&nvt->nvt_lock, flags);
960 nvt_enable_cir(nvt);
961 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
962
963 return 0;
964 }
965
966 static void nvt_close(struct rc_dev *dev)
967 {
968 struct nvt_dev *nvt = dev->priv;
969 unsigned long flags;
970
971 spin_lock_irqsave(&nvt->nvt_lock, flags);
972 nvt_disable_cir(nvt);
973 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
974 }
975
976 /* Allocate memory, probe hardware, and initialize everything */
977 static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
978 {
979 struct nvt_dev *nvt;
980 struct rc_dev *rdev;
981 int ret = -ENOMEM;
982
983 nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL);
984 if (!nvt)
985 return ret;
986
987 /* input device for IR remote (and tx) */
988 rdev = rc_allocate_device();
989 if (!rdev)
990 goto failure;
991
992 ret = -ENODEV;
993 /* validate pnp resources */
994 if (!pnp_port_valid(pdev, 0) ||
995 pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) {
996 dev_err(&pdev->dev, "IR PNP Port not valid!\n");
997 goto failure;
998 }
999
1000 if (!pnp_irq_valid(pdev, 0)) {
1001 dev_err(&pdev->dev, "PNP IRQ not valid!\n");
1002 goto failure;
1003 }
1004
1005 if (!pnp_port_valid(pdev, 1) ||
1006 pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) {
1007 dev_err(&pdev->dev, "Wake PNP Port not valid!\n");
1008 goto failure;
1009 }
1010
1011 nvt->cir_addr = pnp_port_start(pdev, 0);
1012 nvt->cir_irq = pnp_irq(pdev, 0);
1013
1014 nvt->cir_wake_addr = pnp_port_start(pdev, 1);
1015 /* irq is always shared between cir and cir wake */
1016 nvt->cir_wake_irq = nvt->cir_irq;
1017
1018 nvt->cr_efir = CR_EFIR;
1019 nvt->cr_efdr = CR_EFDR;
1020
1021 spin_lock_init(&nvt->nvt_lock);
1022 spin_lock_init(&nvt->tx.lock);
1023
1024 pnp_set_drvdata(pdev, nvt);
1025 nvt->pdev = pdev;
1026
1027 init_waitqueue_head(&nvt->tx.queue);
1028
1029 ret = nvt_hw_detect(nvt);
1030 if (ret)
1031 goto failure;
1032
1033 /* Initialize CIR & CIR Wake Logical Devices */
1034 nvt_efm_enable(nvt);
1035 nvt_cir_ldev_init(nvt);
1036 nvt_cir_wake_ldev_init(nvt);
1037 nvt_efm_disable(nvt);
1038
1039 /* Initialize CIR & CIR Wake Config Registers */
1040 nvt_cir_regs_init(nvt);
1041 nvt_cir_wake_regs_init(nvt);
1042
1043 /* Set up the rc device */
1044 rdev->priv = nvt;
1045 rdev->driver_type = RC_DRIVER_IR_RAW;
1046 rdev->allowed_protos = RC_TYPE_ALL;
1047 rdev->open = nvt_open;
1048 rdev->close = nvt_close;
1049 rdev->tx_ir = nvt_tx_ir;
1050 rdev->s_tx_carrier = nvt_set_tx_carrier;
1051 rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver";
1052 rdev->input_phys = "nuvoton/cir0";
1053 rdev->input_id.bustype = BUS_HOST;
1054 rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2;
1055 rdev->input_id.product = nvt->chip_major;
1056 rdev->input_id.version = nvt->chip_minor;
1057 rdev->dev.parent = &pdev->dev;
1058 rdev->driver_name = NVT_DRIVER_NAME;
1059 rdev->map_name = RC_MAP_RC6_MCE;
1060 rdev->timeout = MS_TO_NS(100);
1061 /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */
1062 rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD);
1063 #if 0
1064 rdev->min_timeout = XYZ;
1065 rdev->max_timeout = XYZ;
1066 /* tx bits */
1067 rdev->tx_resolution = XYZ;
1068 #endif
1069
1070 ret = -EBUSY;
1071 /* now claim resources */
1072 if (!request_region(nvt->cir_addr,
1073 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
1074 goto failure;
1075
1076 if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
1077 NVT_DRIVER_NAME, (void *)nvt))
1078 goto failure;
1079
1080 if (!request_region(nvt->cir_wake_addr,
1081 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
1082 goto failure;
1083
1084 if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
1085 NVT_DRIVER_NAME, (void *)nvt))
1086 goto failure;
1087
1088 ret = rc_register_device(rdev);
1089 if (ret)
1090 goto failure;
1091
1092 device_init_wakeup(&pdev->dev, true);
1093 nvt->rdev = rdev;
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 failure:
1103 if (nvt->cir_irq)
1104 free_irq(nvt->cir_irq, nvt);
1105 if (nvt->cir_addr)
1106 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1107
1108 if (nvt->cir_wake_irq)
1109 free_irq(nvt->cir_wake_irq, nvt);
1110 if (nvt->cir_wake_addr)
1111 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1112
1113 rc_free_device(rdev);
1114 kfree(nvt);
1115
1116 return ret;
1117 }
1118
1119 static void __devexit nvt_remove(struct pnp_dev *pdev)
1120 {
1121 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1122 unsigned long flags;
1123
1124 spin_lock_irqsave(&nvt->nvt_lock, flags);
1125 /* disable CIR */
1126 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1127 nvt_disable_cir(nvt);
1128 /* enable CIR Wake (for IR power-on) */
1129 nvt_enable_wake(nvt);
1130 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1131
1132 /* free resources */
1133 free_irq(nvt->cir_irq, nvt);
1134 free_irq(nvt->cir_wake_irq, nvt);
1135 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1136 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1137
1138 rc_unregister_device(nvt->rdev);
1139
1140 kfree(nvt);
1141 }
1142
1143 static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
1144 {
1145 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1146 unsigned long flags;
1147
1148 nvt_dbg("%s called", __func__);
1149
1150 /* zero out misc state tracking */
1151 spin_lock_irqsave(&nvt->nvt_lock, flags);
1152 nvt->study_state = ST_STUDY_NONE;
1153 nvt->wake_state = ST_WAKE_NONE;
1154 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1155
1156 spin_lock_irqsave(&nvt->tx.lock, flags);
1157 nvt->tx.tx_state = ST_TX_NONE;
1158 spin_unlock_irqrestore(&nvt->tx.lock, flags);
1159
1160 /* disable all CIR interrupts */
1161 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1162
1163 nvt_efm_enable(nvt);
1164
1165 /* disable cir logical dev */
1166 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1167 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
1168
1169 nvt_efm_disable(nvt);
1170
1171 /* make sure wake is enabled */
1172 nvt_enable_wake(nvt);
1173
1174 return 0;
1175 }
1176
1177 static int nvt_resume(struct pnp_dev *pdev)
1178 {
1179 int ret = 0;
1180 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1181
1182 nvt_dbg("%s called", __func__);
1183
1184 /* open interrupt */
1185 nvt_set_cir_iren(nvt);
1186
1187 /* Enable CIR logical device */
1188 nvt_efm_enable(nvt);
1189 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1190 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
1191
1192 nvt_efm_disable(nvt);
1193
1194 nvt_cir_regs_init(nvt);
1195 nvt_cir_wake_regs_init(nvt);
1196
1197 return ret;
1198 }
1199
1200 static void nvt_shutdown(struct pnp_dev *pdev)
1201 {
1202 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1203 nvt_enable_wake(nvt);
1204 }
1205
1206 static const struct pnp_device_id nvt_ids[] = {
1207 { "WEC0530", 0 }, /* CIR */
1208 { "NTN0530", 0 }, /* CIR for new chip's pnp id*/
1209 { "", 0 },
1210 };
1211
1212 static struct pnp_driver nvt_driver = {
1213 .name = NVT_DRIVER_NAME,
1214 .id_table = nvt_ids,
1215 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1216 .probe = nvt_probe,
1217 .remove = __devexit_p(nvt_remove),
1218 .suspend = nvt_suspend,
1219 .resume = nvt_resume,
1220 .shutdown = nvt_shutdown,
1221 };
1222
1223 int nvt_init(void)
1224 {
1225 return pnp_register_driver(&nvt_driver);
1226 }
1227
1228 void nvt_exit(void)
1229 {
1230 pnp_unregister_driver(&nvt_driver);
1231 }
1232
1233 module_param(debug, int, S_IRUGO | S_IWUSR);
1234 MODULE_PARM_DESC(debug, "Enable debugging output");
1235
1236 MODULE_DEVICE_TABLE(pnp, nvt_ids);
1237 MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver");
1238
1239 MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
1240 MODULE_LICENSE("GPL");
1241
1242 module_init(nvt_init);
1243 module_exit(nvt_exit);