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[media] IR: add driver for Nuvoton w836x7hg integrated CIR
[mirror_ubuntu-jammy-kernel.git] / drivers / media / IR / nuvoton-cir.c
CommitLineData
6d2f5c27
JW		 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 <linux/input.h>
36#include <media/ir-core.h>
37#include <linux/pci_ids.h>
38
39#include "nuvoton-cir.h"
40
41static char *chip_id = "w836x7hg";
42
43/* write val to config reg */
44static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg)
45{
46 outb(reg, nvt->cr_efir);
47 outb(val, nvt->cr_efdr);
48}
49
50/* read val from config reg */
51static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg)
52{
53 outb(reg, nvt->cr_efir);
54 return inb(nvt->cr_efdr);
55}
56
57/* update config register bit without changing other bits */
58static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
59{
60 u8 tmp = nvt_cr_read(nvt, reg) | val;
61 nvt_cr_write(nvt, tmp, reg);
62}
63
64/* clear config register bit without changing other bits */
65static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
66{
67 u8 tmp = nvt_cr_read(nvt, reg) & ~val;
68 nvt_cr_write(nvt, tmp, reg);
69}
70
71/* enter extended function mode */
72static inline void nvt_efm_enable(struct nvt_dev *nvt)
73{
74 /* Enabling Extended Function Mode explicitly requires writing 2x */
75 outb(EFER_EFM_ENABLE, nvt->cr_efir);
76 outb(EFER_EFM_ENABLE, nvt->cr_efir);
77}
78
79/* exit extended function mode */
80static inline void nvt_efm_disable(struct nvt_dev *nvt)
81{
82 outb(EFER_EFM_DISABLE, nvt->cr_efir);
83}
84
85/*
86 * When you want to address a specific logical device, write its logical
87 * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing
88 * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN.
89 */
90static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev)
91{
92 outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir);
93 outb(ldev, nvt->cr_efdr);
94}
95
96/* write val to cir config register */
97static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset)
98{
99 outb(val, nvt->cir_addr + offset);
100}
101
102/* read val from cir config register */
103static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset)
104{
105 u8 val;
106
107 val = inb(nvt->cir_addr + offset);
108
109 return val;
110}
111
112/* write val to cir wake register */
113static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt,
114 u8 val, u8 offset)
115{
116 outb(val, nvt->cir_wake_addr + offset);
117}
118
119/* read val from cir wake config register */
120static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
121{
122 u8 val;
123
124 val = inb(nvt->cir_wake_addr + offset);
125
126 return val;
127}
128
129/* dump current cir register contents */
130static 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 printk("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
136 printk(" * CR CIR ACTIVE : 0x%x\n",
137 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
138 printk(" * 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 printk(" * CR CIR IRQ NUM: 0x%x\n",
142 nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
143
144 nvt_efm_disable(nvt);
145
146 printk("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
147 printk(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
148 printk(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
149 printk(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
150 printk(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
151 printk(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
152 printk(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
153 printk(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
154 printk(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
155 printk(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
156 printk(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
157 printk(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
158 printk(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
159 printk(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
160 printk(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
161 printk(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
162 printk(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
163}
164
165/* dump current cir wake register contents */
166static 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 printk("%s: Dump CIR WAKE logical device registers:\n",
174 NVT_DRIVER_NAME);
175 printk(" * CR CIR WAKE ACTIVE : 0x%x\n",
176 nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
177 printk(" * 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 printk(" * 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 printk("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
186 printk(" * IRCON: 0x%x\n",
187 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
188 printk(" * IRSTS: 0x%x\n",
189 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
190 printk(" * IREN: 0x%x\n",
191 nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
192 printk(" * FIFO CMP DEEP: 0x%x\n",
193 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
194 printk(" * FIFO CMP TOL: 0x%x\n",
195 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
196 printk(" * FIFO COUNT: 0x%x\n",
197 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
198 printk(" * SLCH: 0x%x\n",
199 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
200 printk(" * SLCL: 0x%x\n",
201 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
202 printk(" * FIFOCON: 0x%x\n",
203 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
204 printk(" * SRXFSTS: 0x%x\n",
205 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
206 printk(" * SAMPLE RX FIFO: 0x%x\n",
207 nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
208 printk(" * WR FIFO DATA: 0x%x\n",
209 nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
210 printk(" * RD FIFO ONLY: 0x%x\n",
211 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
212 printk(" * RD FIFO ONLY IDX: 0x%x\n",
213 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
214 printk(" * FIFO IGNORE: 0x%x\n",
215 nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
216 printk(" * 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 printk("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
221 printk("* Contents = ");
222 for (i = 0; i < fifo_len; i++)
223 printk("%02x ",
224 nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
225 printk("\n");
226}
227
228/* detect hardware features */
229static int nvt_hw_detect(struct nvt_dev *nvt)
230{
231 unsigned long flags;
232 u8 chip_major, chip_minor;
233 int ret = 0;
234
235 nvt_efm_enable(nvt);
236
237 /* Check if we're wired for the alternate EFER setup */
238 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
239 if (chip_major == 0xff) {
240 nvt->cr_efir = CR_EFIR2;
241 nvt->cr_efdr = CR_EFDR2;
242 nvt_efm_enable(nvt);
243 chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
244 }
245
246 chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO);
247 nvt_dbg("%s: chip id: 0x%02x 0x%02x", chip_id, chip_major, chip_minor);
248
249 if (chip_major != CHIP_ID_HIGH &&
250 (chip_minor != CHIP_ID_LOW || chip_minor != CHIP_ID_LOW2))
251 ret = -ENODEV;
252
253 nvt_efm_disable(nvt);
254
255 spin_lock_irqsave(&nvt->nvt_lock, flags);
256 nvt->chip_major = chip_major;
257 nvt->chip_minor = chip_minor;
258 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
259
260 return ret;
261}
262
263static void nvt_cir_ldev_init(struct nvt_dev *nvt)
264{
265 u8 val;
266
267 /* output pin selection (Pin95=CIRRX, Pin96=CIRTX1, WB enabled */
268 val = nvt_cr_read(nvt, CR_OUTPUT_PIN_SEL);
269 val &= OUTPUT_PIN_SEL_MASK;
270 val |= (OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB);
271 nvt_cr_write(nvt, val, CR_OUTPUT_PIN_SEL);
272
273 /* Select CIR logical device and enable */
274 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
275 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
276
277 nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI);
278 nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO);
279
280 nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC);
281
282 nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d",
283 nvt->cir_addr, nvt->cir_irq);
284}
285
286static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
287{
288 /* Select ACPI logical device, enable it and CIR Wake */
289 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
290 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
291
292 /* Enable CIR Wake via PSOUT# (Pin60) */
293 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
294
295 /* enable cir interrupt of mouse/keyboard IRQ event */
296 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
297
298 /* enable pme interrupt of cir wakeup event */
299 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
300
301 /* Select CIR Wake logical device and enable */
302 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
303 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
304
305 nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI);
306 nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO);
307
308 nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
309
310 nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
311 nvt->cir_wake_addr, nvt->cir_wake_irq);
312}
313
314/* clear out the hardware's cir rx fifo */
315static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
316{
317 u8 val;
318
319 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
320 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
321}
322
323/* clear out the hardware's cir wake rx fifo */
324static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt)
325{
326 u8 val;
327
328 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON);
329 nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR,
330 CIR_WAKE_FIFOCON);
331}
332
333/* clear out the hardware's cir tx fifo */
334static void nvt_clear_tx_fifo(struct nvt_dev *nvt)
335{
336 u8 val;
337
338 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
339 nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON);
340}
341
342static void nvt_cir_regs_init(struct nvt_dev *nvt)
343{
344 /* set sample limit count (PE interrupt raised when reached) */
345 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH);
346 nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL);
347
348 /* set fifo irq trigger levels */
349 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV |
350 CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON);
351
352 /*
353 * Enable TX and RX, specify carrier on = low, off = high, and set
354 * sample period (currently 50us)
355 */
356 nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | CIR_IRCON_RXINV |
357 CIR_IRCON_SAMPLE_PERIOD_SEL, CIR_IRCON);
358
359 /* clear hardware rx and tx fifos */
360 nvt_clear_cir_fifo(nvt);
361 nvt_clear_tx_fifo(nvt);
362
363 /* clear any and all stray interrupts */
364 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
365
366 /* and finally, enable RX Trigger Level Read and Packet End interrupts */
367 nvt_cir_reg_write(nvt, CIR_IREN_RTR | CIR_IREN_PE, CIR_IREN);
368}
369
370static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
371{
372 /* set number of bytes needed for wake key comparison (default 67) */
373 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_LEN, CIR_WAKE_FIFO_CMP_DEEP);
374
375 /* set tolerance/variance allowed per byte during wake compare */
376 nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
377 CIR_WAKE_FIFO_CMP_TOL);
378
379 /* set sample limit count (PE interrupt raised when reached) */
380 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH);
381 nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL);
382
383 /* set cir wake fifo rx trigger level (currently 67) */
384 nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV,
385 CIR_WAKE_FIFOCON);
386
387 /*
388 * Enable TX and RX, specific carrier on = low, off = high, and set
389 * sample period (currently 50us)
390 */
391 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
392 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
393 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
394 CIR_WAKE_IRCON);
395
396 /* clear cir wake rx fifo */
397 nvt_clear_cir_wake_fifo(nvt);
398
399 /* clear any and all stray interrupts */
400 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
401}
402
403static void nvt_enable_wake(struct nvt_dev *nvt)
404{
405 nvt_efm_enable(nvt);
406
407 nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
408 nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
409 nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
410 nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
411
412 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
413 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
414
415 nvt_efm_disable(nvt);
416
417 nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
418 CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
419 CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, CIR_WAKE_IRCON);
420 nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
421 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
422}
423
424/* rx carrier detect only works in learning mode, must be called w/nvt_lock */
425static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt)
426{
427 u32 count, carrier, duration = 0;
428 int i;
429
430 count = nvt_cir_reg_read(nvt, CIR_FCCL) |
431 nvt_cir_reg_read(nvt, CIR_FCCH) << 8;
432
433 for (i = 0; i < nvt->pkts; i++) {
434 if (nvt->buf[i] & BUF_PULSE_BIT)
435 duration += nvt->buf[i] & BUF_LEN_MASK;
436 }
437
438 duration *= SAMPLE_PERIOD;
439
440 if (!count || !duration) {
441 nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)",
442 count, duration);
443 return 0;
444 }
445
446 carrier = (count * 1000000) / duration;
447
448 if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER))
449 nvt_dbg("WTF? Carrier frequency out of range!");
450
451 nvt_dbg("Carrier frequency: %u (count %u, duration %u)",
452 carrier, count, duration);
453
454 return carrier;
455}
456
457/*
458 * set carrier frequency
459 *
460 * set carrier on 2 registers: CP & CC
461 * always set CP as 0x81
462 * set CC by SPEC, CC = 3MHz/carrier - 1
463 */
464static int nvt_set_tx_carrier(void *data, u32 carrier)
465{
466 struct nvt_dev *nvt = data;
467 u16 val;
468
469 nvt_cir_reg_write(nvt, 1, CIR_CP);
470 val = 3000000 / (carrier) - 1;
471 nvt_cir_reg_write(nvt, val & 0xff, CIR_CC);
472
473 nvt_dbg("cp: 0x%x cc: 0x%x\n",
474 nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC));
475
476 return 0;
477}
478
479/*
480 * nvt_tx_ir
481 *
482 * 1) clean TX fifo first (handled by AP)
483 * 2) copy data from user space
484 * 3) disable RX interrupts, enable TX interrupts: TTR & TFU
485 * 4) send 9 packets to TX FIFO to open TTR
486 * in interrupt_handler:
487 * 5) send all data out
488 * go back to write():
489 * 6) disable TX interrupts, re-enable RX interupts
490 *
491 * The key problem of this function is user space data may larger than
492 * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to
493 * buf, and keep current copied data buf num in cur_buf_num. But driver's buf
494 * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to
495 * set TXFCONT as 0xff, until buf_count less than 0xff.
496 */
497static int nvt_tx_ir(void *priv, int *txbuf, u32 n)
498{
499 struct nvt_dev *nvt = priv;
500 unsigned long flags;
501 size_t cur_count;
502 unsigned int i;
503 u8 iren;
504 int ret;
505
506 spin_lock_irqsave(&nvt->tx.lock, flags);
507
508 if (n >= TX_BUF_LEN) {
509 nvt->tx.buf_count = cur_count = TX_BUF_LEN;
510 ret = TX_BUF_LEN;
511 } else {
512 nvt->tx.buf_count = cur_count = n;
513 ret = n;
514 }
515
516 memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count);
517
518 nvt->tx.cur_buf_num = 0;
519
520 /* save currently enabled interrupts */
521 iren = nvt_cir_reg_read(nvt, CIR_IREN);
522
523 /* now disable all interrupts, save TFU & TTR */
524 nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN);
525
526 nvt->tx.tx_state = ST_TX_REPLY;
527
528 nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 |
529 CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
530
531 /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */
532 for (i = 0; i < 9; i++)
533 nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO);
534
535 spin_unlock_irqrestore(&nvt->tx.lock, flags);
536
537 wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST);
538
539 spin_lock_irqsave(&nvt->tx.lock, flags);
540 nvt->tx.tx_state = ST_TX_NONE;
541 spin_unlock_irqrestore(&nvt->tx.lock, flags);
542
543 /* restore enabled interrupts to prior state */
544 nvt_cir_reg_write(nvt, iren, CIR_IREN);
545
546 return ret;
547}
548
549/* dump contents of the last rx buffer we got from the hw rx fifo */
550static void nvt_dump_rx_buf(struct nvt_dev *nvt)
551{
552 int i;
553
554 printk("%s (len %d): ", __func__, nvt->pkts);
555 for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++)
556 printk("0x%02x ", nvt->buf[i]);
557 printk("\n");
558}
559
560/*
561 * Process raw data in rx driver buffer, store it in raw IR event kfifo,
562 * trigger decode when appropriate.
563 *
564 * We get IR data samples one byte at a time. If the msb is set, its a pulse,
565 * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD
566 * (default 50us) intervals for that pulse/space. A discrete signal is
567 * followed by a series of 0x7f packets, then either 0x7<something> or 0x80
568 * to signal more IR coming (repeats) or end of IR, respectively. We store
569 * sample data in the raw event kfifo until we see 0x7<something> (except f)
570 * or 0x80, at which time, we trigger a decode operation.
571 */
572static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
573{
574 struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
575 unsigned int count;
576 u32 carrier;
577 u8 sample;
578 int i;
579
580 nvt_dbg_verbose("%s firing", __func__);
581
582 if (debug)
583 nvt_dump_rx_buf(nvt);
584
585 if (nvt->carrier_detect_enabled)
586 carrier = nvt_rx_carrier_detect(nvt);
587
588 count = nvt->pkts;
589 nvt_dbg_verbose("Processing buffer of len %d", count);
590
591 for (i = 0; i < count; i++) {
592 nvt->pkts--;
593 sample = nvt->buf[i];
594
595 rawir.pulse = ((sample & BUF_PULSE_BIT) != 0);
596 rawir.duration = (sample & BUF_LEN_MASK)
597 * SAMPLE_PERIOD * 1000;
598
599 if ((sample & BUF_LEN_MASK) == BUF_LEN_MASK) {
600 if (nvt->rawir.pulse == rawir.pulse)
601 nvt->rawir.duration += rawir.duration;
602 else {
603 nvt->rawir.duration = rawir.duration;
604 nvt->rawir.pulse = rawir.pulse;
605 }
606 continue;
607 }
608
609 rawir.duration += nvt->rawir.duration;
610 nvt->rawir.duration = 0;
611 nvt->rawir.pulse = rawir.pulse;
612
613 if (sample == BUF_PULSE_BIT)
614 rawir.pulse = false;
615
616 if (rawir.duration) {
617 nvt_dbg("Storing %s with duration %d",
618 rawir.pulse ? "pulse" : "space",
619 rawir.duration);
620
621 ir_raw_event_store(nvt->rdev, &rawir);
622 }
623
624 /*
625 * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE
626 * indicates end of IR signal, but new data incoming. In both
627 * cases, it means we're ready to call ir_raw_event_handle
628 */
629 if (sample == BUF_PULSE_BIT || ((sample != BUF_LEN_MASK) &&
630 (sample & BUF_REPEAT_MASK) == BUF_REPEAT_BYTE))
631 ir_raw_event_handle(nvt->rdev);
632 }
633
634 if (nvt->pkts) {
635 nvt_dbg("Odd, pkts should be 0 now... (its %u)", nvt->pkts);
636 nvt->pkts = 0;
637 }
638
639 nvt_dbg_verbose("%s done", __func__);
640}
641
642/* copy data from hardware rx fifo into driver buffer */
643static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
644{
645 unsigned long flags;
646 u8 fifocount, val;
647 unsigned int b_idx;
648 int i;
649
650 /* Get count of how many bytes to read from RX FIFO */
651 fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
652 /* if we get 0xff, probably means the logical dev is disabled */
653 if (fifocount == 0xff)
654 return;
655 /* this would suggest a fifo overrun, not good... */
656 else if (fifocount > RX_BUF_LEN) {
657 nvt_pr(KERN_WARNING, "fifocount %d over fifo len (%d)!",
658 fifocount, RX_BUF_LEN);
659 return;
660 }
661
662 nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
663
664 spin_lock_irqsave(&nvt->nvt_lock, flags);
665
666 b_idx = nvt->pkts;
667
668 /* This should never happen, but lets check anyway... */
669 if (b_idx + fifocount > RX_BUF_LEN) {
670 nvt_process_rx_ir_data(nvt);
671 b_idx = 0;
672 }
673
674 /* Read fifocount bytes from CIR Sample RX FIFO register */
675 for (i = 0; i < fifocount; i++) {
676 val = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
677 nvt->buf[b_idx + i] = val;
678 }
679
680 nvt->pkts += fifocount;
681 nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
682
683 nvt_process_rx_ir_data(nvt);
684
685 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
686}
687
688static void nvt_cir_log_irqs(u8 status, u8 iren)
689{
690 nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s",
691 status, iren,
692 status & CIR_IRSTS_RDR ? " RDR" : "",
693 status & CIR_IRSTS_RTR ? " RTR" : "",
694 status & CIR_IRSTS_PE ? " PE" : "",
695 status & CIR_IRSTS_RFO ? " RFO" : "",
696 status & CIR_IRSTS_TE ? " TE" : "",
697 status & CIR_IRSTS_TTR ? " TTR" : "",
698 status & CIR_IRSTS_TFU ? " TFU" : "",
699 status & CIR_IRSTS_GH ? " GH" : "",
700 status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE |
701 CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR |
702 CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : "");
703}
704
705static bool nvt_cir_tx_inactive(struct nvt_dev *nvt)
706{
707 unsigned long flags;
708 bool tx_inactive;
709 u8 tx_state;
710
711 spin_lock_irqsave(&nvt->tx.lock, flags);
712 tx_state = nvt->tx.tx_state;
713 spin_unlock_irqrestore(&nvt->tx.lock, flags);
714
715 tx_inactive = (tx_state == ST_TX_NONE);
716
717 return tx_inactive;
718}
719
720/* interrupt service routine for incoming and outgoing CIR data */
721static irqreturn_t nvt_cir_isr(int irq, void *data)
722{
723 struct nvt_dev *nvt = data;
724 u8 status, iren, cur_state;
725 unsigned long flags;
726
727 nvt_dbg_verbose("%s firing", __func__);
728
729 nvt_efm_enable(nvt);
730 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
731 nvt_efm_disable(nvt);
732
733 /*
734 * Get IR Status register contents. Write 1 to ack/clear
735 *
736 * bit: reg name - description
737 * 7: CIR_IRSTS_RDR - RX Data Ready
738 * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach
739 * 5: CIR_IRSTS_PE - Packet End
740 * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set)
741 * 3: CIR_IRSTS_TE - TX FIFO Empty
742 * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach
743 * 1: CIR_IRSTS_TFU - TX FIFO Underrun
744 * 0: CIR_IRSTS_GH - Min Length Detected
745 */
746 status = nvt_cir_reg_read(nvt, CIR_IRSTS);
747 if (!status) {
748 nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__);
749 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
750 return IRQ_RETVAL(IRQ_NONE);
751 }
752
753 /* ack/clear all irq flags we've got */
754 nvt_cir_reg_write(nvt, status, CIR_IRSTS);
755 nvt_cir_reg_write(nvt, 0, CIR_IRSTS);
756
757 /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */
758 iren = nvt_cir_reg_read(nvt, CIR_IREN);
759 if (!iren) {
760 nvt_dbg_verbose("%s exiting, CIR not enabled", __func__);
761 return IRQ_RETVAL(IRQ_NONE);
762 }
763
764 if (debug)
765 nvt_cir_log_irqs(status, iren);
766
767 if (status & CIR_IRSTS_RTR) {
768 /* FIXME: add code for study/learn mode */
769 /* We only do rx if not tx'ing */
770 if (nvt_cir_tx_inactive(nvt))
771 nvt_get_rx_ir_data(nvt);
772 }
773
774 if (status & CIR_IRSTS_PE) {
775 if (nvt_cir_tx_inactive(nvt))
776 nvt_get_rx_ir_data(nvt);
777
778 spin_lock_irqsave(&nvt->nvt_lock, flags);
779
780 cur_state = nvt->study_state;
781
782 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
783
784 if (cur_state == ST_STUDY_NONE)
785 nvt_clear_cir_fifo(nvt);
786 }
787
788 if (status & CIR_IRSTS_TE)
789 nvt_clear_tx_fifo(nvt);
790
791 if (status & CIR_IRSTS_TTR) {
792 unsigned int pos, count;
793 u8 tmp;
794
795 spin_lock_irqsave(&nvt->tx.lock, flags);
796
797 pos = nvt->tx.cur_buf_num;
798 count = nvt->tx.buf_count;
799
800 /* Write data into the hardware tx fifo while pos < count */
801 if (pos < count) {
802 nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO);
803 nvt->tx.cur_buf_num++;
804 /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */
805 } else {
806 tmp = nvt_cir_reg_read(nvt, CIR_IREN);
807 nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN);
808 }
809
810 spin_unlock_irqrestore(&nvt->tx.lock, flags);
811
812 }
813
814 if (status & CIR_IRSTS_TFU) {
815 spin_lock_irqsave(&nvt->tx.lock, flags);
816 if (nvt->tx.tx_state == ST_TX_REPLY) {
817 nvt->tx.tx_state = ST_TX_REQUEST;
818 wake_up(&nvt->tx.queue);
819 }
820 spin_unlock_irqrestore(&nvt->tx.lock, flags);
821 }
822
823 nvt_dbg_verbose("%s done", __func__);
824 return IRQ_RETVAL(IRQ_HANDLED);
825}
826
827/* Interrupt service routine for CIR Wake */
828static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
829{
830 u8 status, iren, val;
831 struct nvt_dev *nvt = data;
832 unsigned long flags;
833
834 nvt_dbg_wake("%s firing", __func__);
835
836 status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
837 if (!status)
838 return IRQ_RETVAL(IRQ_NONE);
839
840 if (status & CIR_WAKE_IRSTS_IR_PENDING)
841 nvt_clear_cir_wake_fifo(nvt);
842
843 nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
844 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
845
846 /* Interrupt may be shared with CIR, bail if Wake not enabled */
847 iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
848 if (!iren) {
849 nvt_dbg_wake("%s exiting, wake not enabled", __func__);
850 return IRQ_RETVAL(IRQ_HANDLED);
851 }
852
853 if ((status & CIR_WAKE_IRSTS_PE) &&
854 (nvt->wake_state == ST_WAKE_START)) {
855 while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
856 val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
857 nvt_dbg("setting wake up key: 0x%x", val);
858 }
859
860 nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
861 spin_lock_irqsave(&nvt->nvt_lock, flags);
862 nvt->wake_state = ST_WAKE_FINISH;
863 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
864 }
865
866 nvt_dbg_wake("%s done", __func__);
867 return IRQ_RETVAL(IRQ_HANDLED);
868}
869
870static void nvt_enable_cir(struct nvt_dev *nvt)
871{
872 /* set function enable flags */
873 nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
874 CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
875 CIR_IRCON);
876
877 nvt_efm_enable(nvt);
878
879 /* enable the CIR logical device */
880 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
881 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
882
883 nvt_efm_disable(nvt);
884
885 /* clear all pending interrupts */
886 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
887
888 /* enable interrupts */
889 nvt_cir_reg_write(nvt, CIR_IREN_RTR | CIR_IREN_PE, CIR_IREN);
890}
891
892static void nvt_disable_cir(struct nvt_dev *nvt)
893{
894 /* disable CIR interrupts */
895 nvt_cir_reg_write(nvt, 0, CIR_IREN);
896
897 /* clear any and all pending interrupts */
898 nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
899
900 /* clear all function enable flags */
901 nvt_cir_reg_write(nvt, 0, CIR_IRCON);
902
903 /* clear hardware rx and tx fifos */
904 nvt_clear_cir_fifo(nvt);
905 nvt_clear_tx_fifo(nvt);
906
907 nvt_efm_enable(nvt);
908
909 /* disable the CIR logical device */
910 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
911 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
912
913 nvt_efm_disable(nvt);
914}
915
916static int nvt_open(void *data)
917{
918 struct nvt_dev *nvt = (struct nvt_dev *)data;
919 unsigned long flags;
920
921 spin_lock_irqsave(&nvt->nvt_lock, flags);
922 nvt->in_use = true;
923 nvt_enable_cir(nvt);
924 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
925
926 return 0;
927}
928
929static void nvt_close(void *data)
930{
931 struct nvt_dev *nvt = (struct nvt_dev *)data;
932 unsigned long flags;
933
934 spin_lock_irqsave(&nvt->nvt_lock, flags);
935 nvt->in_use = false;
936 nvt_disable_cir(nvt);
937 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
938}
939
940/* Allocate memory, probe hardware, and initialize everything */
941static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
942{
943 struct nvt_dev *nvt = NULL;
944 struct input_dev *rdev = NULL;
945 struct ir_dev_props *props = NULL;
946 int ret = -ENOMEM;
947
948 nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL);
949 if (!nvt)
950 return ret;
951
952 props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL);
953 if (!props)
954 goto failure;
955
956 /* input device for IR remote (and tx) */
957 rdev = input_allocate_device();
958 if (!rdev)
959 goto failure;
960
961 ret = -ENODEV;
962 /* validate pnp resources */
963 if (!pnp_port_valid(pdev, 0) ||
964 pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) {
965 dev_err(&pdev->dev, "IR PNP Port not valid!\n");
966 goto failure;
967 }
968
969 if (!pnp_irq_valid(pdev, 0)) {
970 dev_err(&pdev->dev, "PNP IRQ not valid!\n");
971 goto failure;
972 }
973
974 if (!pnp_port_valid(pdev, 1) ||
975 pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) {
976 dev_err(&pdev->dev, "Wake PNP Port not valid!\n");
977 goto failure;
978 }
979
980 nvt->cir_addr = pnp_port_start(pdev, 0);
981 nvt->cir_irq = pnp_irq(pdev, 0);
982
983 nvt->cir_wake_addr = pnp_port_start(pdev, 1);
984 /* irq is always shared between cir and cir wake */
985 nvt->cir_wake_irq = nvt->cir_irq;
986
987 nvt->cr_efir = CR_EFIR;
988 nvt->cr_efdr = CR_EFDR;
989
990 spin_lock_init(&nvt->nvt_lock);
991 spin_lock_init(&nvt->tx.lock);
992
993 ret = -EBUSY;
994 /* now claim resources */
995 if (!request_region(nvt->cir_addr,
996 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
997 goto failure;
998
999 if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
1000 NVT_DRIVER_NAME, (void *)nvt))
1001 goto failure;
1002
1003 if (!request_region(nvt->cir_wake_addr,
1004 CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
1005 goto failure;
1006
1007 if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
1008 NVT_DRIVER_NAME, (void *)nvt))
1009 goto failure;
1010
1011 pnp_set_drvdata(pdev, nvt);
1012 nvt->pdev = pdev;
1013
1014 init_waitqueue_head(&nvt->tx.queue);
1015
1016 ret = nvt_hw_detect(nvt);
1017 if (ret)
1018 goto failure;
1019
1020 /* Initialize CIR & CIR Wake Logical Devices */
1021 nvt_efm_enable(nvt);
1022 nvt_cir_ldev_init(nvt);
1023 nvt_cir_wake_ldev_init(nvt);
1024 nvt_efm_disable(nvt);
1025
1026 /* Initialize CIR & CIR Wake Config Registers */
1027 nvt_cir_regs_init(nvt);
1028 nvt_cir_wake_regs_init(nvt);
1029
1030 /* Set up ir-core props */
1031 props->priv = nvt;
1032 props->driver_type = RC_DRIVER_IR_RAW;
1033 props->allowed_protos = IR_TYPE_ALL;
1034 props->open = nvt_open;
1035 props->close = nvt_close;
1036#if 0
1037 props->min_timeout = XYZ;
1038 props->max_timeout = XYZ;
1039 props->timeout = XYZ;
1040 /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */
1041 props->rx_resolution = XYZ;
1042
1043 /* tx bits */
1044 props->tx_resolution = XYZ;
1045#endif
1046 props->tx_ir = nvt_tx_ir;
1047 props->s_tx_carrier = nvt_set_tx_carrier;
1048
1049 rdev->name = "Nuvoton w836x7hg Infrared Remote Transceiver";
1050 rdev->id.bustype = BUS_HOST;
1051 rdev->id.vendor = PCI_VENDOR_ID_WINBOND2;
1052 rdev->id.product = nvt->chip_major;
1053 rdev->id.version = nvt->chip_minor;
1054
1055 nvt->props = props;
1056 nvt->rdev = rdev;
1057
1058 device_set_wakeup_capable(&pdev->dev, 1);
1059 device_set_wakeup_enable(&pdev->dev, 1);
1060
1061 ret = ir_input_register(rdev, RC_MAP_RC6_MCE, props, NVT_DRIVER_NAME);
1062 if (ret)
1063 goto failure;
1064
1065 nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n");
1066 if (debug) {
1067 cir_dump_regs(nvt);
1068 cir_wake_dump_regs(nvt);
1069 }
1070
1071 return 0;
1072
1073failure:
1074 if (nvt->cir_irq)
1075 free_irq(nvt->cir_irq, nvt);
1076 if (nvt->cir_addr)
1077 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1078
1079 if (nvt->cir_wake_irq)
1080 free_irq(nvt->cir_wake_irq, nvt);
1081 if (nvt->cir_wake_addr)
1082 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1083
1084 input_free_device(rdev);
1085 kfree(props);
1086 kfree(nvt);
1087
1088 return ret;
1089}
1090
1091static void __devexit nvt_remove(struct pnp_dev *pdev)
1092{
1093 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1094 unsigned long flags;
1095
1096 spin_lock_irqsave(&nvt->nvt_lock, flags);
1097 /* disable CIR */
1098 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1099 nvt_disable_cir(nvt);
1100 /* enable CIR Wake (for IR power-on) */
1101 nvt_enable_wake(nvt);
1102 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1103
1104 /* free resources */
1105 free_irq(nvt->cir_irq, nvt);
1106 free_irq(nvt->cir_wake_irq, nvt);
1107 release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
1108 release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
1109
1110 ir_input_unregister(nvt->rdev);
1111
1112 kfree(nvt->props);
1113 kfree(nvt);
1114}
1115
1116static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
1117{
1118 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1119 unsigned long flags;
1120
1121 nvt_dbg("%s called", __func__);
1122
1123 /* zero out misc state tracking */
1124 spin_lock_irqsave(&nvt->nvt_lock, flags);
1125 nvt->study_state = ST_STUDY_NONE;
1126 nvt->wake_state = ST_WAKE_NONE;
1127 spin_unlock_irqrestore(&nvt->nvt_lock, flags);
1128
1129 spin_lock_irqsave(&nvt->tx.lock, flags);
1130 nvt->tx.tx_state = ST_TX_NONE;
1131 spin_unlock_irqrestore(&nvt->tx.lock, flags);
1132
1133 /* disable all CIR interrupts */
1134 nvt_cir_reg_write(nvt, 0, CIR_IREN);
1135
1136 nvt_efm_enable(nvt);
1137
1138 /* disable cir logical dev */
1139 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1140 nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
1141
1142 nvt_efm_disable(nvt);
1143
1144 /* make sure wake is enabled */
1145 nvt_enable_wake(nvt);
1146
1147 return 0;
1148}
1149
1150static int nvt_resume(struct pnp_dev *pdev)
1151{
1152 int ret = 0;
1153 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1154
1155 nvt_dbg("%s called", __func__);
1156
1157 /* open interrupt */
1158 nvt_cir_reg_write(nvt, CIR_IREN_RTR | CIR_IREN_PE, CIR_IREN);
1159
1160 /* Enable CIR logical device */
1161 nvt_efm_enable(nvt);
1162 nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
1163 nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
1164
1165 nvt_efm_disable(nvt);
1166
1167 nvt_cir_regs_init(nvt);
1168 nvt_cir_wake_regs_init(nvt);
1169
1170 return ret;
1171}
1172
1173static void nvt_shutdown(struct pnp_dev *pdev)
1174{
1175 struct nvt_dev *nvt = pnp_get_drvdata(pdev);
1176 nvt_enable_wake(nvt);
1177}
1178
1179static const struct pnp_device_id nvt_ids[] = {
1180 { "WEC0530", 0 }, /* CIR */
1181 { "NTN0530", 0 }, /* CIR for new chip's pnp id*/
1182 { "", 0 },
1183};
1184
1185static struct pnp_driver nvt_driver = {
1186 .name = NVT_DRIVER_NAME,
1187 .id_table = nvt_ids,
1188 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1189 .probe = nvt_probe,
1190 .remove = __devexit_p(nvt_remove),
1191 .suspend = nvt_suspend,
1192 .resume = nvt_resume,
1193 .shutdown = nvt_shutdown,
1194};
1195
1196int nvt_init(void)
1197{
1198 return pnp_register_driver(&nvt_driver);
1199}
1200
1201void nvt_exit(void)
1202{
1203 pnp_unregister_driver(&nvt_driver);
1204}
1205
1206module_param(debug, int, S_IRUGO | S_IWUSR);
1207MODULE_PARM_DESC(debug, "Enable debugging output");
1208
1209MODULE_DEVICE_TABLE(pnp, nvt_ids);
1210MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver");
1211
1212MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
1213MODULE_LICENSE("GPL");
1214
1215module_init(nvt_init);
1216module_exit(nvt_exit);
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