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Fix tusb patch
[openwrt.git] / target / linux / omap24xx / patches-3.1 / 315-n800-touchscreen-and-keypad-drivers.patch
1 From 63e56392b9024aceb610d7b4e1979e2d2cebd217 Mon Sep 17 00:00:00 2001
2 From: Marat Radchenko <marat@slonopotamus.org>
3 Date: Tue, 18 Oct 2011 21:48:23 +0400
4 Subject: [PATCH 1/2] TSC2301 driver (touchscreen and keypad)
5
6 This patch adds support for TSC2301 touchscreen/keypad/audio chip found on Nokia N800.
7 Touchscreen and keypad are fully functional, audio part only provides power management.
8 ---
9 drivers/input/keyboard/Kconfig | 6 +
10 drivers/input/keyboard/Makefile | 1 +
11 drivers/input/keyboard/tsc2301_kp.c | 475 +++++++++++++++
12 drivers/input/touchscreen/Kconfig | 6 +
13 drivers/input/touchscreen/Makefile | 1 +
14 drivers/input/touchscreen/tsc2301_ts.c | 676 +++++++++++++++++++++
15 drivers/spi/Kconfig | 22 +
16 drivers/spi/Makefile | 3 +
17 drivers/spi/tsc2301-core.c | 297 ++++++++++
18 drivers/spi/tsc2301-mixer.c | 1003 ++++++++++++++++++++++++++++++++
19 include/linux/spi/tsc2301.h | 208 +++++++
20 11 files changed, 2698 insertions(+), 0 deletions(-)
21 create mode 100644 drivers/input/keyboard/tsc2301_kp.c
22 create mode 100644 drivers/input/touchscreen/tsc2301_ts.c
23 create mode 100644 drivers/spi/tsc2301-core.c
24 create mode 100644 drivers/spi/tsc2301-mixer.c
25 create mode 100644 include/linux/spi/tsc2301.h
26
27 Index: linux-3.1-rc4/drivers/input/keyboard/Kconfig
28 ===================================================================
29 --- linux-3.1-rc4.orig/drivers/input/keyboard/Kconfig 2011-10-29 22:14:01.548849676 +0200
30 +++ linux-3.1-rc4/drivers/input/keyboard/Kconfig 2011-10-29 22:14:10.444812519 +0200
31 @@ -530,6 +530,12 @@ config KEYBOARD_TNETV107X
32 To compile this driver as a module, choose M here: the
33 module will be called tnetv107x-keypad.
34
35 +config KEYBOARD_TSC2301
36 + tristate "TSC2301 keypad support"
37 + depends on SPI_TSC2301
38 + help
39 + Say Y here for if you are using the keypad features of TSC2301.
40 +
41 config KEYBOARD_TWL4030
42 tristate "TI TWL4030/TWL5030/TPS659x0 keypad support"
43 depends on TWL4030_CORE
44 Index: linux-3.1-rc4/drivers/input/keyboard/Makefile
45 ===================================================================
46 --- linux-3.1-rc4.orig/drivers/input/keyboard/Makefile 2011-10-29 22:14:01.560849628 +0200
47 +++ linux-3.1-rc4/drivers/input/keyboard/Makefile 2011-10-29 22:14:10.444812519 +0200
48 @@ -48,6 +48,7 @@ obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd
49 obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o
50 obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o
51 obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
52 +obj-$(CONFIG_KEYBOARD_TSC2301) += tsc2301_kp.o
53 obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
54 obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
55 obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o
56 Index: linux-3.1-rc4/drivers/input/keyboard/tsc2301_kp.c
57 ===================================================================
58 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
59 +++ linux-3.1-rc4/drivers/input/keyboard/tsc2301_kp.c 2011-10-29 22:27:48.875046931 +0200
60 @@ -0,0 +1,475 @@
61 +/*
62 + * TSC2301 keypad driver
63 + *
64 + * Copyright (C) 2005-2006 Nokia Corporation
65 + *
66 + * Written by Jarkko Oikarinen
67 + * Rewritten by Juha Yrjola <juha.yrjola@nokia.com>
68 + *
69 + * This program is free software; you can redistribute it and/or modify
70 + * it under the terms of the GNU General Public License as published by
71 + * the Free Software Foundation; either version 2 of the License, or
72 + * (at your option) any later version.
73 + *
74 + * This program is distributed in the hope that it will be useful,
75 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
76 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
77 + * GNU General Public License for more details.
78 + *
79 + * You should have received a copy of the GNU General Public License
80 + * along with this program; if not, write to the Free Software
81 + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
82 + *
83 + */
84 +
85 +#include <linux/kernel.h>
86 +#include <linux/module.h>
87 +#include <linux/input.h>
88 +#include <linux/interrupt.h>
89 +#include <linux/irq.h>
90 +#include <linux/delay.h>
91 +#include <linux/spi/spi.h>
92 +
93 +#include <linux/spi/tsc2301.h>
94 +
95 +#define TSC2301_KEYBOARD_PRODUCT_ID 0x0051
96 +#define TSC2301_KEYBOARD_PRODUCT_VERSION 0x0001
97 +#define TSC2301_DEBOUNCE_TIME_2MS 0x0000
98 +#define TSC2301_DEBOUNCE_TIME_10MS 0x0800
99 +#define TSC2301_DEBOUNCE_TIME_20MS 0x1000
100 +#define TSC2301_DEBOUNCE_TIME_50MS 0x1800
101 +#define TSC2301_DEBOUNCE_TIME_60MS 0x2000
102 +#define TSC2301_DEBOUNCE_TIME_80MS 0x2800
103 +#define TSC2301_DEBOUNCE_TIME_100MS 0x3000
104 +#define TSC2301_DEBOUNCE_TIME_120MS 0x3800
105 +
106 +#define TSC2301_DEBOUNCE_TIME TSC2301_DEBOUNCE_TIME_20MS
107 +
108 +#define TSC2301_RELEASE_TIMEOUT 50
109 +
110 +struct tsc2301_kp {
111 + struct input_dev *idev;
112 + char phys[32];
113 + spinlock_t lock;
114 + struct mutex mutex;
115 + struct timer_list timer;
116 + u16 keys_pressed;
117 + unsigned pending:1;
118 + unsigned user_disabled:1;
119 + unsigned disable_depth;
120 +
121 + struct spi_transfer read_xfer[4];
122 + struct spi_message read_msg;
123 +
124 + u16 data;
125 + u16 mask;
126 +
127 + int irq;
128 + s16 keymap[16];
129 +};
130 +
131 +static inline int tsc2301_kp_disabled(struct tsc2301 *tsc)
132 +{
133 + return tsc->kp->disable_depth != 0;
134 +}
135 +
136 +static void tsc2301_kp_send_key_events(struct tsc2301 *tsc,
137 + u16 prev_state,
138 + u16 new_state)
139 +{
140 + struct tsc2301_kp *kp = tsc->kp;
141 + u16 common, released, pressed;
142 + int i;
143 +
144 + common = prev_state & new_state;
145 + released = common ^ prev_state;
146 + pressed = common ^ new_state;
147 + if (!released && !pressed)
148 + return;
149 + for (i = 0; i < 16 && (released || pressed); i++) {
150 + if (released & 1) {
151 + dev_dbg(&tsc->spi->dev, "key %d released\n", i);
152 + input_report_key(kp->idev, kp->keymap[i], 0);
153 + }
154 + released >>= 1;
155 + if (pressed & 1) {
156 + dev_dbg(&tsc->spi->dev, "key %d pressed\n", i);
157 + input_report_key(kp->idev, kp->keymap[i], 1);
158 + }
159 + pressed >>= 1;
160 + }
161 + input_sync(kp->idev);
162 +}
163 +
164 +static inline void _filter_out(struct tsc2301 *tsc, u16 prev_state,
165 + u16 *new_state, int row1, int row2, u8 rect_pat)
166 +{
167 + u16 mask;
168 +
169 + mask = (rect_pat << (row1 * 4)) | (rect_pat << (row2 * 4));
170 + mask &= ~prev_state;
171 + *new_state &= ~mask;
172 + dev_dbg(&tsc->spi->dev, "filtering ghost keys %02x\n", mask);
173 +}
174 +
175 +static void tsc2301_filter_ghost_keys(struct tsc2301 *tsc, u16 prev_state,
176 + u16 *new_state)
177 +{
178 + int row1, row2;
179 + u16 key_map;
180 + u16 row1_map;
181 + static const u8 rect_pat[] = {
182 + 0x3, 0x5, 0x9, 0x6, 0xa, 0xc, 0,
183 + };
184 +
185 + key_map = *new_state;
186 + for (row1 = 0; row1 < 4; row1++) {
187 + row1_map = (key_map >> (row1 * 4)) & 0xf;
188 + if (!row1_map)
189 + continue;
190 + for (row2 = row1 + 1; row2 < 4; row2++) {
191 + u16 rect_map = (key_map >> (row2 * 4)) & 0xf;
192 + const u8 *rp;
193 +
194 + rect_map &= row1_map;
195 + if (!rect_map)
196 + continue;
197 + for (rp = rect_pat; *rp; rp++)
198 + if ((rect_map & *rp) == *rp)
199 + _filter_out(tsc, prev_state, new_state,
200 + row1, row2, *rp);
201 + }
202 + }
203 +}
204 +
205 +static void tsc2301_kp_timer(unsigned long arg)
206 +{
207 + struct tsc2301 *tsc = (void *) arg;
208 + struct tsc2301_kp *kp = tsc->kp;
209 + unsigned long flags;
210 +
211 + tsc2301_kp_send_key_events(tsc, kp->keys_pressed, 0);
212 + spin_lock_irqsave(&kp->lock, flags);
213 + kp->keys_pressed = 0;
214 + spin_unlock_irqrestore(&kp->lock, flags);
215 +}
216 +
217 +static void tsc2301_kp_rx(void *arg)
218 +{
219 + struct tsc2301 *tsc = arg;
220 + struct tsc2301_kp *kp = tsc->kp;
221 + unsigned long flags;
222 + u16 kp_data;
223 +
224 + kp_data = kp->data;
225 + dev_dbg(&tsc->spi->dev, "KP data %04x\n", kp_data);
226 +
227 + tsc2301_filter_ghost_keys(tsc, kp->keys_pressed, &kp_data);
228 + tsc2301_kp_send_key_events(tsc, kp->keys_pressed, kp_data);
229 + spin_lock_irqsave(&kp->lock, flags);
230 + kp->keys_pressed = kp_data;
231 + kp->pending = 0;
232 + spin_unlock_irqrestore(&kp->lock, flags);
233 +}
234 +
235 +static irqreturn_t tsc2301_kp_irq_handler(int irq, void *dev_id)
236 +{
237 + struct tsc2301 *tsc = dev_id;
238 + struct tsc2301_kp *kp = tsc->kp;
239 + unsigned long flags;
240 + int r;
241 +
242 + spin_lock_irqsave(&kp->lock, flags);
243 + if (tsc2301_kp_disabled(tsc)) {
244 + spin_unlock_irqrestore(&kp->lock, flags);
245 + return IRQ_HANDLED;
246 + }
247 + kp->pending = 1;
248 + spin_unlock_irqrestore(&kp->lock, flags);
249 + mod_timer(&kp->timer,
250 + jiffies + msecs_to_jiffies(TSC2301_RELEASE_TIMEOUT));
251 + r = spi_async(tsc->spi, &tsc->kp->read_msg);
252 + if (r)
253 + dev_err(&tsc->spi->dev, "kp: spi_async() failed");
254 + return IRQ_HANDLED;
255 +}
256 +
257 +static void tsc2301_kp_start_scan(struct tsc2301 *tsc)
258 +{
259 + tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, tsc->kp->mask);
260 + tsc2301_write_reg(tsc, TSC2301_REG_KEY, TSC2301_DEBOUNCE_TIME);
261 +}
262 +
263 +static void tsc2301_kp_stop_scan(struct tsc2301 *tsc)
264 +{
265 + tsc2301_write_reg(tsc, TSC2301_REG_KEY, 1 << 14);
266 +}
267 +
268 +/* Must be called with the mutex held */
269 +static void tsc2301_kp_enable(struct tsc2301 *tsc)
270 +{
271 + struct tsc2301_kp *kp = tsc->kp;
272 + unsigned long flags;
273 +
274 + spin_lock_irqsave(&kp->lock, flags);
275 + BUG_ON(!tsc2301_kp_disabled(tsc));
276 + if (--kp->disable_depth != 0) {
277 + spin_unlock_irqrestore(&kp->lock, flags);
278 + return;
279 + }
280 + spin_unlock_irqrestore(&kp->lock, flags);
281 +
282 + irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING);
283 + tsc2301_kp_start_scan(tsc);
284 + enable_irq(kp->irq);
285 +}
286 +
287 +/* Must be called with the mutex held */
288 +static int tsc2301_kp_disable(struct tsc2301 *tsc, int release_keys)
289 +{
290 + struct tsc2301_kp *kp = tsc->kp;
291 + unsigned long flags;
292 +
293 + spin_lock_irqsave(&kp->lock, flags);
294 + if (kp->disable_depth++ != 0) {
295 + spin_unlock_irqrestore(&kp->lock, flags);
296 + goto out;
297 + }
298 + disable_irq_nosync(kp->irq);
299 + irq_set_irq_type(kp->irq, IRQ_TYPE_NONE);
300 + spin_unlock_irqrestore(&kp->lock, flags);
301 +
302 + while (kp->pending) {
303 + msleep(1);
304 + }
305 +
306 + tsc2301_kp_stop_scan(tsc);
307 +out:
308 + if (!release_keys)
309 + del_timer(&kp->timer); /* let timeout release keys */
310 +
311 + return 0;
312 +}
313 +
314 +/* The following workaround is needed for a HW bug triggered by the
315 + * following:
316 + * 1. keep any key pressed
317 + * 2. disable keypad
318 + * 3. release all keys
319 + * 4. reenable keypad
320 + * 5. disable touch screen controller
321 + *
322 + * After this the keypad scanner will get stuck in busy state and won't
323 + * report any interrupts for further keypresses. One way to recover is to
324 + * restart the keypad scanner whenever we enable / disable the
325 + * touchscreen controller.
326 + */
327 +void tsc2301_kp_restart(struct tsc2301 *tsc)
328 +{
329 + if (!tsc2301_kp_disabled(tsc)) {
330 + tsc2301_kp_start_scan(tsc);
331 + }
332 +}
333 +
334 +static ssize_t tsc2301_kp_disable_show(struct device *dev,
335 + struct device_attribute *attr, char *buf)
336 +{
337 + struct tsc2301 *tsc = dev_get_drvdata(dev);
338 +
339 + return sprintf(buf, "%u\n", tsc2301_kp_disabled(tsc) ? 1 : 0);
340 +}
341 +
342 +static ssize_t tsc2301_kp_disable_store(struct device *dev,
343 + struct device_attribute *attr,
344 + const char *buf, size_t count)
345 +{
346 + struct tsc2301 *tsc = dev_get_drvdata(dev);
347 + struct tsc2301_kp *kp = tsc->kp;
348 + char *endp;
349 + int i;
350 +
351 + i = simple_strtoul(buf, &endp, 10);
352 + i = i ? 1 : 0;
353 +
354 + mutex_lock(&kp->mutex);
355 + if (i == kp->user_disabled) {
356 + mutex_unlock(&kp->mutex);
357 + return count;
358 + }
359 + kp->user_disabled = i;
360 +
361 + if (i)
362 + tsc2301_kp_disable(tsc, 1);
363 + else
364 + tsc2301_kp_enable(tsc);
365 + mutex_unlock(&kp->mutex);
366 +
367 + return count;
368 +}
369 +
370 +static DEVICE_ATTR(disable_kp, 0664, tsc2301_kp_disable_show,
371 + tsc2301_kp_disable_store);
372 +
373 +static const u16 tsc2301_kp_read_data = 0x8000 | TSC2301_REG_KPDATA;
374 +
375 +static void tsc2301_kp_setup_spi_xfer(struct tsc2301 *tsc)
376 +{
377 + struct tsc2301_kp *kp = tsc->kp;
378 + struct spi_message *m = &kp->read_msg;
379 + struct spi_transfer *x = &kp->read_xfer[0];
380 +
381 + spi_message_init(&kp->read_msg);
382 +
383 + x->tx_buf = &tsc2301_kp_read_data;
384 + x->len = 2;
385 + spi_message_add_tail(x, m);
386 + x++;
387 +
388 + x->rx_buf = &kp->data;
389 + x->len = 2;
390 + spi_message_add_tail(x, m);
391 +
392 + m->complete = tsc2301_kp_rx;
393 + m->context = tsc;
394 +}
395 +
396 +#ifdef CONFIG_PM
397 +int tsc2301_kp_suspend(struct tsc2301 *tsc)
398 +{
399 + struct tsc2301_kp *kp = tsc->kp;
400 +
401 + mutex_lock(&kp->mutex);
402 + tsc2301_kp_disable(tsc, 1);
403 + mutex_unlock(&kp->mutex);
404 + return 0;
405 +}
406 +
407 +void tsc2301_kp_resume(struct tsc2301 *tsc)
408 +{
409 + struct tsc2301_kp *kp = tsc->kp;
410 +
411 + mutex_lock(&kp->mutex);
412 + tsc2301_kp_enable(tsc);
413 + mutex_unlock(&kp->mutex);
414 +}
415 +#endif
416 +
417 +int __devinit tsc2301_kp_init(struct tsc2301 *tsc,
418 + struct tsc2301_platform_data *pdata)
419 +{
420 + struct input_dev *idev;
421 + struct tsc2301_kp *kp;
422 + int r, i;
423 + u16 mask;
424 +
425 + if (pdata->keyb_int < 0) {
426 + dev_err(&tsc->spi->dev, "need kbirq");
427 + return -EINVAL;
428 + }
429 +
430 + kp = kzalloc(sizeof(*kp), GFP_KERNEL);
431 + if (kp == NULL)
432 + return -ENOMEM;
433 + tsc->kp = kp;
434 +
435 + kp->irq = pdata->keyb_int;
436 + spin_lock_init(&kp->lock);
437 + mutex_init(&kp->mutex);
438 +
439 + init_timer(&kp->timer);
440 + kp->timer.data = (unsigned long) tsc;
441 + kp->timer.function = tsc2301_kp_timer;
442 +
443 + idev = input_allocate_device();
444 + if (idev == NULL) {
445 + r = -ENOMEM;
446 + goto err1;
447 + }
448 + if (pdata->keyb_name)
449 + idev->name = pdata->keyb_name;
450 + else
451 + idev->name = "TSC2301 keypad";
452 + snprintf(kp->phys, sizeof(kp->phys), "%s/input-kp", dev_name(&tsc->spi->dev));
453 + idev->phys = kp->phys;
454 +
455 + mask = 0;
456 + idev->evbit[0] = BIT(EV_KEY);
457 + for (i = 0; i < 16; i++) {
458 + if (pdata->keymap[i] > 0) {
459 + set_bit(pdata->keymap[i], idev->keybit);
460 + kp->keymap[i] = pdata->keymap[i];
461 + } else {
462 + kp->keymap[i] = -1;
463 + mask |= 1 << i;
464 + }
465 + }
466 +
467 + if (pdata->kp_rep)
468 + set_bit(EV_REP, idev->evbit);
469 +
470 + kp->idev = idev;
471 +
472 + tsc2301_kp_setup_spi_xfer(tsc);
473 +
474 + r = device_create_file(&tsc->spi->dev, &dev_attr_disable_kp);
475 + if (r < 0)
476 + goto err2;
477 +
478 + tsc2301_kp_start_scan(tsc);
479 +
480 + /* IRQ mode 0 is faulty, it can cause the KBIRQ to get stuck.
481 + * Mode 2 deasserts the IRQ at:
482 + * - HW or SW reset
483 + * - Setting SCS flag in REG_KEY register
484 + * - Releasing all keys
485 + * - Reading the REG_KPDATA
486 + */
487 + tsc2301_write_kbc(tsc, 2);
488 +
489 + tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, mask);
490 + kp->mask = mask;
491 +
492 + irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING);
493 +
494 + r = request_irq(kp->irq, tsc2301_kp_irq_handler, IRQF_SAMPLE_RANDOM,
495 + "tsc2301-kp", tsc);
496 + if (r < 0) {
497 + dev_err(&tsc->spi->dev, "unable to get kbirq IRQ");
498 + goto err3;
499 + }
500 + irq_set_irq_wake(kp->irq, 1);
501 +
502 + /* We need to read the register once..? */
503 + tsc2301_read_reg(tsc, TSC2301_REG_KPDATA);
504 +
505 + r = input_register_device(idev);
506 + if (r < 0) {
507 + dev_err(&tsc->spi->dev, "can't register keypad device\n");
508 + goto err4;
509 + }
510 +
511 + return 0;
512 +
513 +err4:
514 + free_irq(kp->irq, tsc);
515 +err3:
516 + tsc2301_kp_stop_scan(tsc);
517 + device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp);
518 +err2:
519 + input_free_device(kp->idev);
520 +err1:
521 + kfree(kp);
522 + return r;
523 +}
524 +
525 +void __devexit tsc2301_kp_exit(struct tsc2301 *tsc)
526 +{
527 + struct tsc2301_kp *kp = tsc->kp;
528 +
529 + tsc2301_kp_disable(tsc, 1);
530 + input_unregister_device(kp->idev);
531 + free_irq(kp->irq, tsc);
532 + device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp);
533 +
534 + kfree(kp);
535 +}
536 Index: linux-3.1-rc4/drivers/input/touchscreen/Kconfig
537 ===================================================================
538 --- linux-3.1-rc4.orig/drivers/input/touchscreen/Kconfig 2011-10-29 22:14:01.532849745 +0200
539 +++ linux-3.1-rc4/drivers/input/touchscreen/Kconfig 2011-10-29 22:14:10.444812519 +0200
540 @@ -673,6 +673,12 @@ config TOUCHSCREEN_TSC2007
541 To compile this driver as a module, choose M here: the
542 module will be called tsc2007.
543
544 +config TOUCHSCREEN_TSC2301
545 + tristate "TSC2301 touchscreen support"
546 + depends on SPI_TSC2301
547 + help
548 + Say Y here for if you are using the touchscreen features of TSC2301.
549 +
550 config TOUCHSCREEN_W90X900
551 tristate "W90P910 touchscreen driver"
552 depends on HAVE_CLK
553 Index: linux-3.1-rc4/drivers/input/touchscreen/Makefile
554 ===================================================================
555 --- linux-3.1-rc4.orig/drivers/input/touchscreen/Makefile 2011-10-29 22:14:01.544849693 +0200
556 +++ linux-3.1-rc4/drivers/input/touchscreen/Makefile 2011-10-29 22:14:10.444812519 +0200
557 @@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) +=
558 obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
559 obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
560 obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
561 +obj-$(CONFIG_TOUCHSCREEN_TSC2301) += tsc2301_ts.o
562 obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
563 obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
564 obj-$(CONFIG_TOUCHSCREEN_WM831X) += wm831x-ts.o
565 Index: linux-3.1-rc4/drivers/input/touchscreen/tsc2301_ts.c
566 ===================================================================
567 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
568 +++ linux-3.1-rc4/drivers/input/touchscreen/tsc2301_ts.c 2011-10-29 22:29:36.693801882 +0200
569 @@ -0,0 +1,676 @@
570 +/*
571 + * TSC2301 touchscreen driver
572 + *
573 + * Copyright (C) 2005-2008 Nokia Corporation
574 + *
575 + * Written by Jarkko Oikarinen, Imre Deak and Juha Yrjola
576 + *
577 + * This program is free software; you can redistribute it and/or modify
578 + * it under the terms of the GNU General Public License as published by
579 + * the Free Software Foundation; either version 2 of the License, or
580 + * (at your option) any later version.
581 + *
582 + * This program is distributed in the hope that it will be useful,
583 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
584 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
585 + * GNU General Public License for more details.
586 + *
587 + * You should have received a copy of the GNU General Public License
588 + * along with this program; if not, write to the Free Software
589 + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
590 + *
591 + */
592 +
593 +#include <linux/kernel.h>
594 +#include <linux/module.h>
595 +#include <linux/input.h>
596 +#include <linux/interrupt.h>
597 +#include <linux/delay.h>
598 +#include <linux/spi/spi.h>
599 +
600 +#include <linux/spi/tsc2301.h>
601 +
602 +/**
603 + * The touchscreen interface operates as follows:
604 + *
605 + * Initialize:
606 + * Request access to GPIO103 (DAV)
607 + * tsc2301_ts_irq_handler will trigger when DAV line goes down
608 + *
609 + * 1) Pen is pressed against touchscreeen
610 + * 2) TSC2301 performs AD conversion
611 + * 3) After the conversion is done TSC2301 drives DAV line down
612 + * 4) GPIO IRQ is received and tsc2301_ts_irq_handler is called
613 + * 5) tsc2301_ts_irq_handler queues up an spi transfer to fetch
614 + * the x, y, z1, z2 values
615 + * 6) SPI framework calls tsc2301_ts_rx after the coordinates are read
616 + * 7) When the penup_timer expires, there have not been DAV interrupts
617 + * during the last 20ms which means the pen has been lifted.
618 + */
619 +
620 +
621 +#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052
622 +#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001
623 +
624 +#define TSC2301_TS_PENUP_TIME 20
625 +
626 +#define TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 0x8000
627 +#define TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST 0x0000
628 +
629 +#define TSC2301_ADCREG_FUNCTION_NONE 0x0000
630 +#define TSC2301_ADCREG_FUNCTION_XY 0x0400
631 +#define TSC2301_ADCREG_FUNCTION_XYZ 0x0800
632 +#define TSC2301_ADCREG_FUNCTION_X 0x0C00
633 +#define TSC2301_ADCREG_FUNCTION_Y 0x1000
634 +#define TSC2301_ADCREG_FUNCTION_Z 0x1400
635 +#define TSC2301_ADCREG_FUNCTION_DAT1 0x1800
636 +#define TSC2301_ADCREG_FUNCTION_DAT2 0x1C00
637 +#define TSC2301_ADCREG_FUNCTION_AUX1 0x2000
638 +#define TSC2301_ADCREG_FUNCTION_AUX2 0x2400
639 +#define TSC2301_ADCREG_FUNCTION_TEMP 0x2800
640 +
641 +#define TSC2301_ADCREG_RESOLUTION_8BIT 0x0100
642 +#define TSC2301_ADCREG_RESOLUTION_10BIT 0x0200
643 +#define TSC2301_ADCREG_RESOLUTION_12BIT 0x0300
644 +
645 +#define TSC2301_ADCREG_AVERAGING_NONE 0x0000
646 +#define TSC2301_ADCREG_AVERAGING_4AVG 0x0040
647 +#define TSC2301_ADCREG_AVERAGING_8AVG 0x0080
648 +#define TSC2301_ADCREG_AVERAGING_16AVG 0x00C0
649 +
650 +#define TSC2301_ADCREG_CLOCK_8MHZ 0x0000
651 +#define TSC2301_ADCREG_CLOCK_4MHZ 0x0010
652 +#define TSC2301_ADCREG_CLOCK_2MHZ 0x0020
653 +#define TSC2301_ADCREG_CLOCK_1MHZ 0x0030
654 +
655 +#define TSC2301_ADCREG_VOLTAGE_STAB_0US 0x0000
656 +#define TSC2301_ADCREG_VOLTAGE_STAB_100US 0x0002
657 +#define TSC2301_ADCREG_VOLTAGE_STAB_500US 0x0004
658 +#define TSC2301_ADCREG_VOLTAGE_STAB_1MS 0x0006
659 +#define TSC2301_ADCREG_VOLTAGE_STAB_5MS 0x0008
660 +#define TSC2301_ADCREG_VOLTAGE_STAB_10MS 0x000A
661 +#define TSC2301_ADCREG_VOLTAGE_STAB_50MS 0x000C
662 +#define TSC2301_ADCREG_VOLTAGE_STAB_100MS 0x000E
663 +
664 +#define TSC2301_ADCREG_STOP_CONVERSION 0x4000
665 +
666 +#define MAX_12BIT ((1 << 12) - 1)
667 +
668 +#define TS_RECT_SIZE 8
669 +#define TSF_MIN_Z1 100
670 +#define TSF_MAX_Z2 4000
671 +
672 +#define TSF_SAMPLES 4
673 +
674 +struct ts_filter {
675 + int sample_cnt;
676 +
677 + int avg_x;
678 + int avg_y;
679 + int avg_z1;
680 + int avg_z2;
681 +};
682 +
683 +struct ts_coords {
684 + u16 x;
685 + u16 y;
686 + u16 z1;
687 + u16 z2;
688 +};
689 +
690 +struct tsc2301_ts {
691 + struct input_dev *idev;
692 + char phys[32];
693 + struct timer_list penup_timer;
694 + struct mutex mutex;
695 +
696 + struct spi_transfer read_xfer[2];
697 + struct spi_message read_msg;
698 + struct ts_coords *coords;
699 +
700 + struct ts_filter filter;
701 +
702 + int hw_avg_max;
703 + u16 x;
704 + u16 y;
705 + u16 p;
706 +
707 + u16 x_plate_ohm;
708 + int stab_time;
709 + int max_pressure;
710 + int touch_pressure;
711 +
712 + u8 event_sent;
713 + u8 pen_down;
714 + u8 disabled;
715 + u8 disable_depth;
716 +
717 + int hw_flags;
718 + int irq;
719 +};
720 +
721 +
722 +static const u16 tsc2301_ts_read_data = 0x8000 | TSC2301_REG_X;
723 +
724 +static int tsc2301_ts_check_config(struct tsc2301_ts *ts, int *hw_flags)
725 +{
726 + int flags;
727 +
728 + flags = 0;
729 + switch (ts->hw_avg_max) {
730 + case 0:
731 + flags |= TSC2301_ADCREG_AVERAGING_NONE;
732 + break;
733 + case 4:
734 + flags |= TSC2301_ADCREG_AVERAGING_4AVG;
735 + break;
736 + case 8:
737 + flags |= TSC2301_ADCREG_AVERAGING_8AVG;
738 + break;
739 + case 16:
740 + flags |= TSC2301_ADCREG_AVERAGING_16AVG;
741 + break;
742 + default:
743 + return -EINVAL;
744 + }
745 +
746 + switch (ts->stab_time) {
747 + case 0:
748 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_0US;
749 + break;
750 + case 100:
751 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_100US;
752 + break;
753 + case 500:
754 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_500US;
755 + break;
756 + case 1000:
757 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_1MS;
758 + break;
759 + case 5000:
760 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_5MS;
761 + break;
762 + case 10000:
763 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_10MS;
764 + break;
765 + case 50000:
766 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_50MS;
767 + break;
768 + case 100000:
769 + flags |= TSC2301_ADCREG_VOLTAGE_STAB_100MS;
770 + break;
771 + default:
772 + return -EINVAL;
773 + }
774 +
775 + *hw_flags = flags;
776 + return 0;
777 +}
778 +
779 +/*
780 + * This odd three-time initialization is to work around a bug in TSC2301.
781 + * See TSC2301 errata for details.
782 + */
783 +static int tsc2301_ts_configure(struct tsc2301 *tsc, int flags)
784 +{
785 + struct spi_transfer xfer[5];
786 + struct spi_transfer *x;
787 + struct spi_message m;
788 + int i;
789 + u16 val1, val2, val3;
790 + u16 data[10];
791 +
792 + val1 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
793 + TSC2301_ADCREG_STOP_CONVERSION |
794 + TSC2301_ADCREG_FUNCTION_NONE |
795 + TSC2301_ADCREG_RESOLUTION_12BIT |
796 + TSC2301_ADCREG_AVERAGING_NONE |
797 + TSC2301_ADCREG_CLOCK_2MHZ |
798 + TSC2301_ADCREG_VOLTAGE_STAB_100MS;
799 +
800 + val2 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
801 + TSC2301_ADCREG_FUNCTION_XYZ |
802 + TSC2301_ADCREG_RESOLUTION_12BIT |
803 + TSC2301_ADCREG_AVERAGING_16AVG |
804 + TSC2301_ADCREG_CLOCK_1MHZ |
805 + TSC2301_ADCREG_VOLTAGE_STAB_100MS;
806 +
807 + /* Averaging and voltage stabilization settings in flags */
808 + val3 = TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 |
809 + TSC2301_ADCREG_FUNCTION_XYZ |
810 + TSC2301_ADCREG_RESOLUTION_12BIT |
811 + TSC2301_ADCREG_CLOCK_2MHZ |
812 + flags;
813 +
814 + /* Now we prepare the command for transferring */
815 + data[0] = TSC2301_REG_ADC;
816 + data[1] = val1;
817 + data[2] = TSC2301_REG_ADC;
818 + data[3] = val2;
819 + data[4] = TSC2301_REG_ADC;
820 + data[5] = val3;
821 + data[6] = TSC2301_REG_REF;
822 + data[7] = 1 << 4 | 1 << 2 | 1; /* intref, 100uS settl, 2.5V ref */
823 + data[8] = TSC2301_REG_CONFIG;
824 + data[9] = 3 << 3 | 2 << 0; /* 340uS pre-chrg, 544us delay */
825 +
826 + spi_message_init(&m);
827 + m.spi = tsc->spi;
828 +
829 + memset(xfer, 0, sizeof(xfer));
830 + x = &xfer[0];
831 +
832 + for (i = 0; i < 10; i += 2) {
833 + x->tx_buf = &data[i];
834 + x->len = 4;
835 + if (i != 8)
836 + x->cs_change = 1;
837 + spi_message_add_tail(x, &m);
838 + x++;
839 + }
840 + spi_sync(m.spi, &m);
841 +
842 + return 0;
843 +}
844 +
845 +static void tsc2301_ts_start_scan(struct tsc2301 *tsc)
846 +{
847 + tsc2301_ts_configure(tsc, tsc->ts->hw_flags);
848 + tsc2301_kp_restart(tsc);
849 +}
850 +
851 +static void tsc2301_ts_stop_scan(struct tsc2301 *tsc)
852 +{
853 + tsc2301_write_reg(tsc, TSC2301_REG_ADC, TSC2301_ADCREG_STOP_CONVERSION);
854 + tsc2301_kp_restart(tsc);
855 +}
856 +
857 +static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure)
858 +{
859 + if (pressure) {
860 + input_report_abs(ts->idev, ABS_X, x);
861 + input_report_abs(ts->idev, ABS_Y, y);
862 + input_report_abs(ts->idev, ABS_PRESSURE, pressure);
863 + if (!ts->pen_down)
864 + input_report_key(ts->idev, BTN_TOUCH, 1);
865 + ts->pen_down = 1;
866 + } else {
867 + input_report_abs(ts->idev, ABS_PRESSURE, 0);
868 + if (ts->pen_down)
869 + input_report_key(ts->idev, BTN_TOUCH, 0);
870 + ts->pen_down = 0;
871 + }
872 +
873 + input_sync(ts->idev);
874 +
875 +#ifdef VERBOSE
876 + dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure);
877 +#endif
878 +}
879 +
880 +static int filter(struct tsc2301_ts *ts, int x, int y, int z1, int z2)
881 +{
882 + int inside_rect, pressure_limit, Rt;
883 + struct ts_filter *tsf = &ts->filter;
884 +
885 + /* validate pressure and position */
886 + if (x > MAX_12BIT || y > MAX_12BIT)
887 + return 0;
888 +
889 + /* skip coords if the pressure-components are out of range */
890 + if (z1 < TSF_MIN_Z1 || z2 > TSF_MAX_Z2)
891 + return 0;
892 +
893 + /* Use the x,y,z1,z2 directly on the first "pen down" event */
894 + if (ts->event_sent) {
895 + tsf->avg_x += x;
896 + tsf->avg_y += y;
897 + tsf->avg_z1 += z1;
898 + tsf->avg_z2 += z2;
899 +
900 + if (++tsf->sample_cnt < TSF_SAMPLES)
901 + return 0;
902 + x = tsf->avg_x / TSF_SAMPLES;
903 + y = tsf->avg_y / TSF_SAMPLES;
904 + z1 = tsf->avg_z1 / TSF_SAMPLES;
905 + z2 = tsf->avg_z2 / TSF_SAMPLES;
906 + }
907 + tsf->sample_cnt = 0;
908 + tsf->avg_x = 0;
909 + tsf->avg_y = 0;
910 + tsf->avg_z1 = 0;
911 + tsf->avg_z2 = 0;
912 +
913 + pressure_limit = ts->event_sent? ts->max_pressure: ts->touch_pressure;
914 +
915 + /* z1 is always at least 100: */
916 + Rt = x * (z2 - z1) / z1;
917 + Rt = Rt * ts->x_plate_ohm / 4096;
918 + if (Rt > pressure_limit)
919 + return 0;
920 +
921 + /* discard the event if it still is within the previous rect - unless
922 + * if the pressure is harder, but then use previous x,y position */
923 + inside_rect = (
924 + x > (int)ts->x - TS_RECT_SIZE && x < (int)ts->x + TS_RECT_SIZE &&
925 + y > (int)ts->y - TS_RECT_SIZE && y < (int)ts->y + TS_RECT_SIZE);
926 +
927 + if (!ts->event_sent || !inside_rect) {
928 + ts->x = x;
929 + ts->y = y;
930 + ts->p = Rt;
931 + return 1;
932 + } else if (Rt < ts->p) {
933 + ts->p = Rt;
934 + return 1;
935 + }
936 + return 0;
937 +}
938 +
939 +/*
940 + * This procedure is called by the SPI framework after the coordinates
941 + * have been read from TSC2301
942 + */
943 +static void tsc2301_ts_rx(void *arg)
944 +{
945 + struct tsc2301 *tsc = arg;
946 + struct tsc2301_ts *ts = tsc->ts;
947 + int send_event;
948 + int x, y, z1, z2;
949 +
950 + x = ts->coords->x;
951 + y = ts->coords->y;
952 + z1 = ts->coords->z1;
953 + z2 = ts->coords->z2;
954 +
955 + send_event = filter(ts, x, y, z1, z2);
956 + if (send_event) {
957 + update_pen_state(ts, ts->x, ts->y, ts->p);
958 + ts->event_sent = 1;
959 + }
960 +
961 + mod_timer(&ts->penup_timer,
962 + jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
963 +}
964 +
965 +/*
966 + * Timer is called TSC2301_TS_PENUP_TIME after pen is up
967 + */
968 +static void tsc2301_ts_timer_handler(unsigned long data)
969 +{
970 + struct tsc2301 *tsc = (struct tsc2301 *)data;
971 + struct tsc2301_ts *ts = tsc->ts;
972 +
973 + if (ts->event_sent) {
974 + ts->event_sent = 0;
975 + update_pen_state(ts, 0, 0, 0);
976 + }
977 +}
978 +
979 +/*
980 + * This interrupt is called when pen is down and coordinates are
981 + * available. That is indicated by a falling edge on DEV line.
982 + */
983 +static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id)
984 +{
985 + struct tsc2301 *tsc = dev_id;
986 + struct tsc2301_ts *ts = tsc->ts;
987 + int r;
988 +
989 + r = spi_async(tsc->spi, &ts->read_msg);
990 + if (r)
991 + dev_err(&tsc->spi->dev, "ts: spi_async() failed");
992 +
993 + mod_timer(&ts->penup_timer,
994 + jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
995 +
996 + return IRQ_HANDLED;
997 +}
998 +
999 +static void tsc2301_ts_disable(struct tsc2301 *tsc)
1000 +{
1001 + struct tsc2301_ts *ts = tsc->ts;
1002 +
1003 + if (ts->disable_depth++ != 0)
1004 + return;
1005 +
1006 + disable_irq(ts->irq);
1007 +
1008 + /* wait until penup timer expire normally */
1009 + do {
1010 + msleep(1);
1011 + } while (ts->event_sent);
1012 +
1013 + tsc2301_ts_stop_scan(tsc);
1014 +}
1015 +
1016 +static void tsc2301_ts_enable(struct tsc2301 *tsc)
1017 +{
1018 + struct tsc2301_ts *ts = tsc->ts;
1019 +
1020 + if (--ts->disable_depth != 0)
1021 + return;
1022 +
1023 + enable_irq(ts->irq);
1024 +
1025 + tsc2301_ts_start_scan(tsc);
1026 +}
1027 +
1028 +#ifdef CONFIG_PM
1029 +int tsc2301_ts_suspend(struct tsc2301 *tsc)
1030 +{
1031 + struct tsc2301_ts *ts = tsc->ts;
1032 +
1033 + mutex_lock(&ts->mutex);
1034 + tsc2301_ts_disable(tsc);
1035 + mutex_unlock(&ts->mutex);
1036 +
1037 + return 0;
1038 +}
1039 +
1040 +void tsc2301_ts_resume(struct tsc2301 *tsc)
1041 +{
1042 + struct tsc2301_ts *ts = tsc->ts;
1043 +
1044 + mutex_lock(&ts->mutex);
1045 + tsc2301_ts_enable(tsc);
1046 + mutex_unlock(&ts->mutex);
1047 +}
1048 +#endif
1049 +
1050 +static void tsc2301_ts_setup_spi_xfer(struct tsc2301 *tsc)
1051 +{
1052 + struct tsc2301_ts *ts = tsc->ts;
1053 + struct spi_message *m = &ts->read_msg;
1054 + struct spi_transfer *x = &ts->read_xfer[0];
1055 +
1056 + spi_message_init(m);
1057 +
1058 + x->tx_buf = &tsc2301_ts_read_data;
1059 + x->len = 2;
1060 + spi_message_add_tail(x, m);
1061 +
1062 + x++;
1063 + x->rx_buf = ts->coords;
1064 + x->len = 8;
1065 + spi_message_add_tail(x, m);
1066 +
1067 + m->complete = tsc2301_ts_rx;
1068 + m->context = tsc;
1069 +}
1070 +
1071 +static ssize_t tsc2301_ts_pen_down_show(struct device *dev,
1072 + struct device_attribute *attr,
1073 + char *buf)
1074 +{
1075 + struct tsc2301 *tsc = dev_get_drvdata(dev);
1076 +
1077 + return sprintf(buf, "%u\n", tsc->ts->pen_down);
1078 +}
1079 +
1080 +static DEVICE_ATTR(pen_down, S_IRUGO, tsc2301_ts_pen_down_show, NULL);
1081 +
1082 +static ssize_t tsc2301_ts_disable_show(struct device *dev,
1083 + struct device_attribute *attr, char *buf)
1084 +{
1085 + struct tsc2301 *tsc = dev_get_drvdata(dev);
1086 + struct tsc2301_ts *ts = tsc->ts;
1087 +
1088 + return sprintf(buf, "%u\n", ts->disabled);
1089 +}
1090 +
1091 +static ssize_t tsc2301_ts_disable_store(struct device *dev,
1092 + struct device_attribute *attr,
1093 + const char *buf, size_t count)
1094 +{
1095 + struct tsc2301 *tsc = dev_get_drvdata(dev);
1096 + struct tsc2301_ts *ts = tsc->ts;
1097 + char *endp;
1098 + int i;
1099 +
1100 + i = simple_strtoul(buf, &endp, 10);
1101 + i = i ? 1 : 0;
1102 + mutex_lock(&ts->mutex);
1103 + if (i == ts->disabled) goto out;
1104 + ts->disabled = i;
1105 +
1106 + if (i)
1107 + tsc2301_ts_disable(tsc);
1108 + else
1109 + tsc2301_ts_enable(tsc);
1110 +out:
1111 + mutex_unlock(&ts->mutex);
1112 + return count;
1113 +}
1114 +
1115 +static DEVICE_ATTR(disable_ts, 0664, tsc2301_ts_disable_show,
1116 + tsc2301_ts_disable_store);
1117 +
1118 +int __devinit tsc2301_ts_init(struct tsc2301 *tsc,
1119 + struct tsc2301_platform_data *pdata)
1120 +{
1121 + struct tsc2301_ts *ts;
1122 + struct input_dev *idev;
1123 + int r;
1124 + int x_max, y_max;
1125 + int x_fudge, y_fudge, p_fudge;
1126 +
1127 + if (pdata->dav_int <= 0) {
1128 + dev_err(&tsc->spi->dev, "need DAV IRQ");
1129 + return -EINVAL;
1130 + }
1131 +
1132 + ts = kzalloc(sizeof(*ts), GFP_KERNEL);
1133 + if (ts == NULL)
1134 + return -ENOMEM;
1135 + tsc->ts = ts;
1136 +
1137 + ts->coords = kzalloc(sizeof(*ts->coords), GFP_KERNEL);
1138 + if (ts->coords == NULL) {
1139 + kfree(ts);
1140 + return -ENOMEM;
1141 + }
1142 +
1143 + ts->irq = pdata->dav_int;
1144 +
1145 + init_timer(&ts->penup_timer);
1146 + setup_timer(&ts->penup_timer, tsc2301_ts_timer_handler,
1147 + (unsigned long)tsc);
1148 +
1149 + mutex_init(&ts->mutex);
1150 +
1151 + ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
1152 + ts->hw_avg_max = pdata->ts_hw_avg;
1153 + ts->max_pressure = pdata->ts_max_pressure ? : MAX_12BIT;
1154 + ts->touch_pressure = pdata->ts_touch_pressure ? : ts->max_pressure;
1155 + ts->stab_time = pdata->ts_stab_time;
1156 +
1157 + x_max = pdata->ts_x_max ? : 4096;
1158 + y_max = pdata->ts_y_max ? : 4096;
1159 + x_fudge = pdata->ts_x_fudge ? : 4;
1160 + y_fudge = pdata->ts_y_fudge ? : 8;
1161 + p_fudge = pdata->ts_pressure_fudge ? : 2;
1162 +
1163 + if ((r = tsc2301_ts_check_config(ts, &ts->hw_flags))) {
1164 + dev_err(&tsc->spi->dev, "invalid configuration\n");
1165 + goto err2;
1166 + }
1167 +
1168 + idev = input_allocate_device();
1169 + if (idev == NULL) {
1170 + r = -ENOMEM;
1171 + goto err2;
1172 + }
1173 + idev->name = "TSC2301 touchscreen";
1174 + snprintf(ts->phys, sizeof(ts->phys),
1175 + "%s/input-ts", dev_name(&tsc->spi->dev));
1176 + idev->phys = ts->phys;
1177 + idev->dev.parent = &tsc->spi->dev;
1178 +
1179 + idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
1180 + idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
1181 + ts->idev = idev;
1182 +
1183 + tsc2301_ts_setup_spi_xfer(tsc);
1184 +
1185 + /* These parameters should perhaps be configurable? */
1186 + input_set_abs_params(idev, ABS_X, 0, x_max, x_fudge, 0);
1187 + input_set_abs_params(idev, ABS_Y, 0, y_max, y_fudge, 0);
1188 + input_set_abs_params(idev, ABS_PRESSURE, 0, ts->max_pressure,
1189 + p_fudge, 0);
1190 +
1191 + tsc2301_ts_start_scan(tsc);
1192 +
1193 + r = request_irq(ts->irq, tsc2301_ts_irq_handler,
1194 + IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
1195 + "tsc2301-ts", tsc);
1196 + if (r < 0) {
1197 + dev_err(&tsc->spi->dev, "unable to get DAV IRQ");
1198 + goto err3;
1199 + }
1200 + irq_set_irq_wake(ts->irq, 1);
1201 +
1202 + if (device_create_file(&tsc->spi->dev, &dev_attr_pen_down) < 0)
1203 + goto err4;
1204 + if (device_create_file(&tsc->spi->dev, &dev_attr_disable_ts) < 0)
1205 + goto err5;
1206 +
1207 + r = input_register_device(idev);
1208 + if (r < 0) {
1209 + dev_err(&tsc->spi->dev, "can't register touchscreen device\n");
1210 + goto err6;
1211 + }
1212 +
1213 + return 0;
1214 +err6:
1215 + device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
1216 +err5:
1217 + device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
1218 +err4:
1219 + free_irq(ts->irq, tsc);
1220 +err3:
1221 + tsc2301_ts_stop_scan(tsc);
1222 + input_free_device(idev);
1223 +err2:
1224 + kfree(ts->coords);
1225 + kfree(ts);
1226 + return r;
1227 +}
1228 +
1229 +void __devexit tsc2301_ts_exit(struct tsc2301 *tsc)
1230 +{
1231 + struct tsc2301_ts *ts = tsc->ts;
1232 +
1233 + tsc2301_ts_disable(tsc);
1234 +
1235 + device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
1236 + device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
1237 +
1238 + free_irq(ts->irq, tsc);
1239 + input_unregister_device(ts->idev);
1240 +
1241 + kfree(ts->coords);
1242 + kfree(ts);
1243 +}
1244 +MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@nokia.com>");
1245 +MODULE_LICENSE("GPL");
1246 Index: linux-3.1-rc4/drivers/spi/Kconfig
1247 ===================================================================
1248 --- linux-3.1-rc4.orig/drivers/spi/Kconfig 2011-10-29 22:14:10.260813287 +0200
1249 +++ linux-3.1-rc4/drivers/spi/Kconfig 2011-10-29 22:14:10.448812502 +0200
1250 @@ -435,6 +435,28 @@ config SPI_TLE62X0
1251 sysfs interface, with each line presented as a kind of GPIO
1252 exposing both switch control and diagnostic feedback.
1253
1254 +config SPI_TSC2301
1255 + tristate "TSC2301 driver"
1256 + depends on SPI_MASTER
1257 + help
1258 + Say Y here if you have a TSC2301 chip connected to an SPI
1259 + bus on your board.
1260 +
1261 + The TSC2301 is a highly integrated PDA analog interface circuit.
1262 + It contains a complete 12-bit A/D resistive touch screen
1263 + converter (ADC) including drivers, touch pressure measurement
1264 + capability, keypad controller, and 8-bit D/A converter (DAC) output
1265 + for LCD contrast control.
1266 +
1267 + To compile this driver as a module, choose M here: the
1268 + module will be called tsc2301.
1269 +
1270 +config SPI_TSC2301_AUDIO
1271 + boolean "TSC2301 audio support"
1272 + depends on SPI_TSC2301 && SND
1273 + help
1274 + Say Y here for if you are using the audio features of TSC2301.
1275 +
1276 #
1277 # Add new SPI protocol masters in alphabetical order above this line
1278 #
1279 Index: linux-3.1-rc4/drivers/spi/Makefile
1280 ===================================================================
1281 --- linux-3.1-rc4.orig/drivers/spi/Makefile 2011-10-29 22:14:10.260813287 +0200
1282 +++ linux-3.1-rc4/drivers/spi/Makefile 2011-10-29 22:14:10.448812502 +0200
1283 @@ -59,4 +59,6 @@ obj-$(CONFIG_SPI_TLE62X0) += spi-tle62x
1284 obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi-topcliff-pch.o
1285 obj-$(CONFIG_SPI_TXX9) += spi-txx9.o
1286 obj-$(CONFIG_SPI_XILINX) += spi-xilinx.o
1287 -
1288 +obj-$(CONFIG_SPI_TSC2301) += tsc2301.o
1289 +tsc2301-objs := tsc2301-core.o
1290 +tsc2301-$(CONFIG_SPI_TSC2301_AUDIO) += tsc2301-mixer.o
1291 Index: linux-3.1-rc4/drivers/spi/tsc2301-core.c
1292 ===================================================================
1293 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1294 +++ linux-3.1-rc4/drivers/spi/tsc2301-core.c 2011-10-29 22:14:10.448812502 +0200
1295 @@ -0,0 +1,297 @@
1296 +/*
1297 + * TSC2301 driver
1298 + *
1299 + * Copyright (C) 2005, 2006 Nokia Corporation
1300 + *
1301 + * This program is free software; you can redistribute it and/or modify
1302 + * it under the terms of the GNU General Public License as published by
1303 + * the Free Software Foundation; either version 2 of the License, or
1304 + * (at your option) any later version.
1305 + *
1306 + * This program is distributed in the hope that it will be useful,
1307 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1308 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1309 + * GNU General Public License for more details.
1310 + *
1311 + * You should have received a copy of the GNU General Public License
1312 + * along with this program; if not, write to the Free Software
1313 + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1314 + *
1315 + */
1316 +
1317 +#include <linux/module.h>
1318 +#include <linux/device.h>
1319 +#include <linux/delay.h>
1320 +#include <linux/gpio.h>
1321 +#include <linux/spi/spi.h>
1322 +#include <linux/spi/tsc2301.h>
1323 +
1324 +u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg)
1325 +{
1326 + struct spi_transfer t[2];
1327 + struct spi_message m;
1328 + u16 data = 0, cmd;
1329 +
1330 + cmd = reg;
1331 + cmd |= 0x8000;
1332 +
1333 + memset(t, 0, sizeof(t));
1334 + spi_message_init(&m);
1335 + m.spi = tsc->spi;
1336 +
1337 + t[0].tx_buf = &cmd;
1338 + t[0].rx_buf = NULL;
1339 + t[0].len = 2;
1340 + spi_message_add_tail(&t[0], &m);
1341 +
1342 + t[1].tx_buf = NULL;
1343 + t[1].rx_buf = &data;
1344 + t[1].len = 2;
1345 + spi_message_add_tail(&t[1], &m);
1346 +
1347 + spi_sync(m.spi, &m);
1348 +
1349 + return data;
1350 +}
1351 +
1352 +void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val)
1353 +{
1354 + struct spi_transfer t;
1355 + struct spi_message m;
1356 + u16 data[2];
1357 +
1358 + /* Now we prepare the command for transferring */
1359 + data[0] = reg;
1360 + data[1] = val;
1361 +
1362 + spi_message_init(&m);
1363 + m.spi = tsc->spi;
1364 +
1365 + memset(&t, 0, sizeof(t));
1366 + t.tx_buf = data;
1367 + t.rx_buf = NULL;
1368 + t.len = 4;
1369 + spi_message_add_tail(&t, &m);
1370 +
1371 + spi_sync(m.spi, &m);
1372 +}
1373 +
1374 +void tsc2301_write_kbc(struct tsc2301 *tsc, int val)
1375 +{
1376 + u16 w;
1377 +
1378 + w = tsc->config2_shadow;
1379 + w &= ~(0x03 << 14);
1380 + w |= (val & 0x03) << 14;
1381 + tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
1382 + tsc->config2_shadow = w;
1383 +}
1384 +
1385 +void tsc2301_write_pll(struct tsc2301 *tsc,
1386 + int pll_n, int pll_a, int pll_pdc, int pct_e, int pll_o)
1387 +{
1388 + u16 w;
1389 +
1390 + w = tsc->config2_shadow;
1391 + w &= ~0x3fff;
1392 + w |= (pll_n & 0x0f) | ((pll_a & 0x0f) << 4) | ((pll_pdc & 0x0f) << 8);
1393 + w |= pct_e ? (1 << 12) : 0;
1394 + w |= pll_o ? (1 << 13) : 0;
1395 + tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
1396 + tsc->config2_shadow = w;
1397 +}
1398 +
1399 +void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *rx_buf, int len)
1400 +{
1401 + struct spi_transfer t[2];
1402 + struct spi_message m;
1403 + u16 cmd, i;
1404 +
1405 + cmd = reg;
1406 + cmd |= 0x8000;
1407 +
1408 + spi_message_init(&m);
1409 + m.spi = tsc->spi;
1410 +
1411 + memset(t, 0, sizeof(t));
1412 + t[0].tx_buf = &cmd;
1413 + t[0].rx_buf = NULL;
1414 + t[0].len = 2;
1415 + spi_message_add_tail(&t[0], &m);
1416 +
1417 + t[1].tx_buf = NULL;
1418 + t[1].rx_buf = rx_buf;
1419 + t[1].len = 2 * len;
1420 + spi_message_add_tail(&t[1], &m);
1421 +
1422 + spi_sync(m.spi, &m);
1423 +
1424 + for (i = 0; i < len; i++)
1425 + printk(KERN_DEBUG "rx_buf[%d]: %04x\n", i, rx_buf[i]);
1426 +}
1427 +
1428 +static int __devinit tsc2301_probe(struct spi_device *spi)
1429 +{
1430 + struct tsc2301 *tsc;
1431 + struct tsc2301_platform_data *pdata = spi->dev.platform_data;
1432 + int r;
1433 + u16 w;
1434 +
1435 + if (!pdata) {
1436 + dev_dbg(&spi->dev, "no platform data?\n");
1437 + return -ENODEV;
1438 + }
1439 +
1440 + tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);
1441 + if (tsc == NULL)
1442 + return -ENOMEM;
1443 +
1444 + dev_set_drvdata(&spi->dev, tsc);
1445 + tsc->spi = spi;
1446 +
1447 + tsc->enable_clock = pdata->enable_clock;
1448 + tsc->disable_clock = pdata->disable_clock;
1449 +
1450 + if (pdata->reset_gpio >= 0) {
1451 + tsc->reset_gpio = pdata->reset_gpio;
1452 + r = gpio_request(tsc->reset_gpio, "TSC2301 reset");
1453 + if (r < 0)
1454 + goto err1;
1455 + gpio_direction_output(tsc->reset_gpio, 1);
1456 + mdelay(1);
1457 + gpio_set_value(tsc->reset_gpio, 0);
1458 + } else
1459 + tsc->reset_gpio = -1;
1460 +
1461 + spi->mode = SPI_MODE_1;
1462 + spi->bits_per_word = 16;
1463 + /* The max speed might've been defined by the board-specific
1464 + * struct */
1465 + if (!spi->max_speed_hz)
1466 + spi->max_speed_hz = TSC2301_HZ;
1467 + spi_setup(spi);
1468 +
1469 + /* Soft reset */
1470 + tsc2301_write_reg(tsc, TSC2301_REG_RESET, 0xbb00);
1471 + msleep(1);
1472 +
1473 + w = tsc2301_read_reg(tsc, TSC2301_REG_ADC);
1474 + if (!(w & (1 << 14))) {
1475 + dev_err(&spi->dev, "invalid ADC reg value: %04x\n", w);
1476 + r = -ENODEV;
1477 + goto err1;
1478 + }
1479 +
1480 + w = tsc2301_read_reg(tsc, TSC2301_REG_DAC);
1481 + if (!(w & (1 << 15))) {
1482 + dev_err(&spi->dev, "invalid DAC reg value: %04x\n", w);
1483 + r = -ENODEV;
1484 + goto err1;
1485 + }
1486 +
1487 + /* Stop keypad scanning */
1488 + tsc2301_write_reg(tsc, TSC2301_REG_KEY, 0x4000);
1489 +
1490 + /* We have to cache this for read-modify-write, since we can't
1491 + * read back BIT15 */
1492 + w = tsc2301_read_reg(tsc, TSC2301_REG_CONFIG2);
1493 + /* By default BIT15 is set */
1494 + w |= 1 << 15;
1495 + tsc->config2_shadow = w;
1496 +
1497 + r = tsc2301_kp_init(tsc, pdata);
1498 + if (r)
1499 + goto err1;
1500 + r = tsc2301_ts_init(tsc, pdata);
1501 + if (r)
1502 + goto err2;
1503 + r = tsc2301_mixer_init(tsc, pdata);
1504 + if (r)
1505 + goto err3;
1506 + return 0;
1507 +
1508 +err3:
1509 + tsc2301_ts_exit(tsc);
1510 +err2:
1511 + tsc2301_kp_exit(tsc);
1512 +err1:
1513 + kfree(tsc);
1514 + return r;
1515 +}
1516 +
1517 +static int __devexit tsc2301_remove(struct spi_device *spi)
1518 +{
1519 + struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
1520 +
1521 + tsc2301_mixer_exit(tsc);
1522 + tsc2301_ts_exit(tsc);
1523 + tsc2301_kp_exit(tsc);
1524 + if (tsc->reset_gpio >= 0)
1525 + gpio_free(tsc->reset_gpio);
1526 + kfree(tsc);
1527 +
1528 + return 0;
1529 +}
1530 +
1531 +#ifdef CONFIG_PM
1532 +static int tsc2301_suspend(struct spi_device *spi, pm_message_t mesg)
1533 +{
1534 + struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
1535 + int r;
1536 +
1537 + if ((r = tsc2301_mixer_suspend(tsc)) < 0)
1538 + return r;
1539 + if ((r = tsc2301_kp_suspend(tsc)) < 0)
1540 + goto err1;
1541 + if ((r = tsc2301_ts_suspend(tsc)) < 0)
1542 + goto err2;
1543 +
1544 + return 0;
1545 +err2:
1546 + tsc2301_kp_resume(tsc);
1547 +err1:
1548 + tsc2301_mixer_resume(tsc);
1549 + return r;
1550 +}
1551 +
1552 +static int tsc2301_resume(struct spi_device *spi)
1553 +{
1554 + struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
1555 +
1556 + tsc2301_ts_resume(tsc);
1557 + tsc2301_kp_resume(tsc);
1558 + tsc2301_mixer_resume(tsc);
1559 + return 0;
1560 +}
1561 +#endif
1562 +
1563 +static struct spi_driver tsc2301_driver = {
1564 + .driver = {
1565 + .name = "tsc2301",
1566 + .bus = &spi_bus_type,
1567 + .owner = THIS_MODULE,
1568 + },
1569 +#ifdef CONFIG_PM
1570 + .suspend = tsc2301_suspend,
1571 + .resume = tsc2301_resume,
1572 +#endif
1573 + .probe = tsc2301_probe,
1574 + .remove = __devexit_p(tsc2301_remove),
1575 +};
1576 +
1577 +static int __init tsc2301_init(void)
1578 +{
1579 + printk("TSC2301 driver initializing\n");
1580 +
1581 + return spi_register_driver(&tsc2301_driver);
1582 +}
1583 +module_init(tsc2301_init);
1584 +
1585 +static void __exit tsc2301_exit(void)
1586 +{
1587 + spi_unregister_driver(&tsc2301_driver);
1588 +}
1589 +module_exit(tsc2301_exit);
1590 +
1591 +MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>");
1592 +MODULE_LICENSE("GPL");
1593 Index: linux-3.1-rc4/drivers/spi/tsc2301-mixer.c
1594 ===================================================================
1595 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1596 +++ linux-3.1-rc4/drivers/spi/tsc2301-mixer.c 2011-10-29 22:14:10.448812502 +0200
1597 @@ -0,0 +1,1003 @@
1598 +/*
1599 + * ALSA Mixer implementation for TSC2301
1600 + *
1601 + * Copyright (C) 2006 Nokia Corporation.
1602 + *
1603 + * Contact: Jarkko Nikula <jarkko.nikula@nokia.com>
1604 + * Juha Yrjola
1605 + *
1606 + * Some notes about TSC2301:
1607 + * - PLL will stop when DAC and ADC's are powered down.
1608 + * - Touchscreen will stop working when audio part is powered up and if audio
1609 + * MCLK is stopped. Problem is avoided if audio is powered down before
1610 + * stopping MCLK.
1611 + * - Audio DAC or audio outputs will activate only after 100 msec from the
1612 + * chip power-up. Reason seems to be VCM since there is no this delay if the
1613 + * chip and VCM (bit AVPD on PD/MISC) were not powered down. The chip will
1614 + * consume about 1 mA if all other audio blocks are powered down except the
1615 + * chip itself and VCM. Full power down consumes only about few uA.
1616 + * - Power-down transition could happen earliest about 100 msec after the chip
1617 + * power-up. Otherwise power-down will fail if there is no that 100 msec
1618 + * on time before it. It's not obvious why is that since chip reports
1619 + * power-up to be completed and also PLL output on GPIO_0 is active in few
1620 + * milliseconds.
1621 + *
1622 + * This program is free software; you can redistribute it and/or
1623 + * modify it under the terms of the GNU General Public License
1624 + * version 2 as published by the Free Software Foundation.
1625 + *
1626 + * This program is distributed in the hope that it will be useful, but
1627 + * WITHOUT ANY WARRANTY; without even the implied warranty of
1628 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1629 + * General Public License for more details.
1630 + *
1631 + * You should have received a copy of the GNU General Public License
1632 + * along with this program; if not, write to the Free Software
1633 + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
1634 + * 02110-1301 USA
1635 + *
1636 + */
1637 +
1638 +#include <linux/module.h>
1639 +#include <linux/device.h>
1640 +#include <linux/errno.h>
1641 +#include <linux/delay.h>
1642 +#include <linux/slab.h>
1643 +#include <linux/spi/spi.h>
1644 +#include <linux/spi/tsc2301.h>
1645 +
1646 +#include <sound/core.h>
1647 +#include <sound/control.h>
1648 +
1649 +/* shadow register indexes */
1650 +enum {
1651 + /* audio control and volume registers */
1652 + AUDCNTL_INDEX,
1653 + ADCVOL_INDEX,
1654 + DACVOL_INDEX,
1655 + BPVOL_INDEX,
1656 + /* keyclick control register (not needed here) */
1657 + /* audio power control register */
1658 + PD_MISC_INDEX,
1659 + /* TSC2301 GPIO control register */
1660 + GPIO_INDEX,
1661 +
1662 + SHADOW_REG_COUNT,
1663 +};
1664 +
1665 +/* structure for driver private data */
1666 +struct tsc2301_mixer {
1667 + struct tsc2301 *tsc;
1668 + struct mutex mutex;
1669 +
1670 + /* shadow registers holding TSC2301 audio registers. Used to hold
1671 + * their states during the sleep and also to reduce communication with
1672 + * the chip since get callback functions could get register values
1673 + * directly from these shadow registers without needing to read them
1674 + * from the chip */
1675 + u16 shadow_regs[SHADOW_REG_COUNT];
1676 +
1677 + /* audio controller driver usage of the ADC and DAC */
1678 + unsigned adc_enabled:1, dac_enabled:1;
1679 + unsigned pll_output:1;
1680 + unsigned mclk_enabled;
1681 +
1682 + /* latest audio power-up timestamp */
1683 + unsigned long pu_jiffies;
1684 +
1685 + /* these are used when upper layer(s) are going to power-down TSC2301
1686 + * before 100 msec is passed from power-up */
1687 + struct delayed_work delayed_power_down;
1688 + unsigned delayed_pd_active:1;
1689 +
1690 + int (* platform_init)(struct device *);
1691 + void (* platform_cleanup)(struct device *);
1692 +
1693 + struct tsc2301_mixer_gpio *mixer_gpios;
1694 + int n_mixer_gpios;
1695 +};
1696 +
1697 +#define TSC2301_DAC_DELAY msecs_to_jiffies(100)
1698 +#define TSC2301_MIN_PU_PERIOD msecs_to_jiffies(100)
1699 +
1700 +#define TSC2301_REG_TO_PVAL(reg) \
1701 + (TSC2301_REG_TO_PAGE(reg) << 6 | TSC2301_REG_TO_ADDR(reg))
1702 +#define TSC2301_PVAL_TO_REG(v) \
1703 + (TSC2301_REG((((v) >> 6) & 3),((v) & 0x1f)))
1704 +
1705 +#define TSC2301_VOLUME_MASK 0x7f
1706 +#define TSC2301_MIN_ADCVOL 6
1707 +#define TSC2301_MIN_DACVOL 0
1708 +#define TSC2301_MIN_BPVOL 31
1709 +#define TSC2301_MUTE_LEFT_SHIFT 15
1710 +#define TSC2301_VOL_LEFT_SHIFT 8
1711 +#define TSC2301_MUTE_RIGHT_SHIFT 7
1712 +#define TSC2301_VOL_RIGHT_SHIFT 0
1713 +
1714 +#define TSC2301_INM_MASK 3
1715 +#define TSC2301_INML_SHIFT 12
1716 +#define TSC2301_INMR_SHIFT 10
1717 +
1718 +#define TSC2301_MICG_MASK 3
1719 +#define TSC2301_MICG_MIN 1 /* values 0 & 1 both mean 0 dB */
1720 +#define TSC2301_MICG_SHIFT 8
1721 +
1722 +#define TSC2301_REG_AUDCNTL_MCLK(v) (((v) & 3) << 6)
1723 +#define TSC2301_REG_AUDCNTL_I2SFS(v) (((v) & 0xf) << 2)
1724 +#define TSC2301_REG_AUDCNTL_I2SFM(v) (((v) & 3) << 0)
1725 +
1726 +#define TSC2301_SINGLE(xname, xindex, reg, shadow_index, shift, mask, min) \
1727 +{\
1728 + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1729 + .name = xname, \
1730 + .index = xindex, \
1731 + .info = snd_tsc2301_info_single, \
1732 + .get = snd_tsc2301_get_single, \
1733 + .put = snd_tsc2301_put_single, \
1734 + .private_value = TSC2301_REG_TO_PVAL(reg) | \
1735 + (shadow_index << 8) | (shift << 16) | (mask << 24) | \
1736 + (min << 28) \
1737 +}
1738 +#define TSC2301_SINGLE_MINVAL(v) (((v) >> 28) & 15)
1739 +#define TSC2301_SINGLE_SHIFT(v) (((v) >> 16) & 15)
1740 +#define TSC2301_SINGLE_MASK(v) (((v) >> 24) & 15)
1741 +
1742 +#define TSC2301_DOUBLE(xname, xindex, reg, shadow_index, ls, rs, mask, min) \
1743 +{\
1744 + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1745 + .name = xname, \
1746 + .index = xindex, \
1747 + .info = snd_tsc2301_info_double, \
1748 + .get = snd_tsc2301_get_double, \
1749 + .put = snd_tsc2301_put_double, \
1750 + .private_value = TSC2301_REG_TO_PVAL(reg) | \
1751 + (shadow_index << 8) | (min << 11) | \
1752 + (ls << 16) | (rs << 20) | (mask << 24) \
1753 +}
1754 +#define TSC2301_DOUBLE_MINVAL(v) (((v) >> 11) & 0x1f)
1755 +#define TSC2301_DOUBLE_LEFT_SHIFT(v) (((v) >> 16) & 15)
1756 +#define TSC2301_DOUBLE_RIGHT_SHIFT(v) (((v) >> 20) & 15)
1757 +#define TSC2301_DOUBLE_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
1758 +
1759 +#define TSC2301_MUX(xname, xindex, reg, shadow_index, ls, rs, mask) \
1760 +{\
1761 + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1762 + .name = xname, \
1763 + .index = xindex, \
1764 + .info = snd_tsc2301_info_mux, \
1765 + .get = snd_tsc2301_get_mux, \
1766 + .put = snd_tsc2301_put_mux, \
1767 + .private_value = TSC2301_REG_TO_PVAL(reg) | \
1768 + (shadow_index << 8) | (ls << 16) | (rs << 20) | (mask << 24) \
1769 +}
1770 +#define TSC2301_MUX_LEFT_SHIFT(v) (((v) >> 16) & 15)
1771 +#define TSC2301_MUX_RIGHT_SHIFT(v) (((v) >> 20) & 15)
1772 +#define TSC2301_MUX_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
1773 +
1774 +#define TSC2301_BOOL(xname, xindex, reg, shadow_index, shift, invert, state) \
1775 +{ \
1776 + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1777 + .name = xname, \
1778 + .index = xindex, \
1779 + .info = snd_tsc2301_info_bool, \
1780 + .get = snd_tsc2301_get_bool, \
1781 + .put = snd_tsc2301_put_bool, \
1782 + .private_value = TSC2301_REG_TO_PVAL(reg) | \
1783 + (shadow_index << 8) | (shift << 16) | \
1784 + (invert << 24) | (state << 25) \
1785 +}
1786 +#define TSC2301_BOOL_SHIFT(v) (((v) >> 16) & 7)
1787 +#define TSC2301_BOOL_INVERT(v) (((v) >> 24) & 1)
1788 +#define TSC2301_BOOL_STATE(v) (((v) >> 25) & 1)
1789 +
1790 +#define TSC2301_SHADOW_INDEX(v) (((v) >> 8) & 7)
1791 +
1792 +/*
1793 + * Power-down handler for additional GPIO mixer controls. GPIO state of GPIO
1794 + * controls whose power-down flag is enabled are set to their false/deactivate
1795 + * state
1796 + *
1797 + * Must be called tsc->mixer->mutex locked
1798 + */
1799 +static void tsc2301_gpio_power_down(struct tsc2301 *tsc)
1800 +{
1801 + struct tsc2301_mixer *mix = tsc->mixer;
1802 + u16 temp;
1803 + int i;
1804 +
1805 + temp = mix->shadow_regs[GPIO_INDEX];
1806 + for (i = 0; i < mix->n_mixer_gpios; i++) {
1807 + const struct tsc2301_mixer_gpio *mg;
1808 +
1809 + mg = mix->mixer_gpios + i;
1810 + if (mg->deactivate_on_pd) {
1811 + int gpio = mg->gpio;
1812 +
1813 + temp &= ~(1 << gpio);
1814 + temp |= mg->inverted << gpio;
1815 + }
1816 + }
1817 + tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
1818 +}
1819 +
1820 +/*
1821 + * Powers down/up audio blocks which are muted or become unused.
1822 + * shadow_index >= 0, changes power state of single audio block
1823 + * shadow_index < 0, changes power state of all blocks
1824 + *
1825 + * Must be called tsc->mixer->mutex locked
1826 + */
1827 +#define TSC2301_MUTE_MASK \
1828 + ((1 << TSC2301_MUTE_LEFT_SHIFT) | (1 << TSC2301_MUTE_RIGHT_SHIFT))
1829 +static void tsc2301_power_ctrl(struct tsc2301 *tsc, int shadow_index,
1830 + int poll_pdsts)
1831 +{
1832 + struct tsc2301_mixer *mix = tsc->mixer;
1833 + u16 pd_ctrl, pd_ctrl_old, w;
1834 + unsigned long timeout;
1835 + int power_up = 0;
1836 +
1837 + if (mix->delayed_pd_active) {
1838 + mix->delayed_pd_active = 0;
1839 + mix->mclk_enabled--;
1840 + cancel_delayed_work(&mix->delayed_power_down);
1841 + }
1842 +
1843 + pd_ctrl = pd_ctrl_old = mix->shadow_regs[PD_MISC_INDEX];
1844 + /* power control helper based on used space mixer selections. See
1845 + * actual power control decisions below */
1846 + if (shadow_index < 0 || shadow_index == ADCVOL_INDEX) {
1847 + /* ADC left and right power down control */
1848 + if (mix->shadow_regs[ADCVOL_INDEX] &
1849 + (1 << TSC2301_MUTE_LEFT_SHIFT))
1850 + /* left ADC muted. Power down the left ADC */
1851 + pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
1852 + else
1853 + pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDL;
1854 + if (mix->shadow_regs[ADCVOL_INDEX] &
1855 + (1 << TSC2301_MUTE_LEFT_SHIFT))
1856 + /* right ADC muted. Power down the right ADC */
1857 + pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
1858 + else
1859 + pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDR;
1860 + }
1861 + if (shadow_index < 0 || shadow_index == DACVOL_INDEX) {
1862 + /* DAC power down control */
1863 + if ((mix->shadow_regs[DACVOL_INDEX] &
1864 + TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
1865 + /* both DACs muted. Power down the DAC */
1866 + pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
1867 + else
1868 + pd_ctrl &= ~TSC2301_REG_PD_MISC_DAPD;
1869 + }
1870 + if (shadow_index < 0 || shadow_index == BPVOL_INDEX) {
1871 + /* line bypass power down control */
1872 + if ((mix->shadow_regs[BPVOL_INDEX] &
1873 + TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
1874 + /* both line bypasses muted. Power down the bypass
1875 + * path */
1876 + pd_ctrl |= TSC2301_REG_PD_MISC_ABPD;
1877 + else
1878 + pd_ctrl &= ~TSC2301_REG_PD_MISC_ABPD;
1879 + }
1880 + if (shadow_index < 0 || shadow_index == AUDCNTL_INDEX) {
1881 + /* mic bias power down control */
1882 + if ((mix->shadow_regs[AUDCNTL_INDEX] &
1883 + (3 << TSC2301_INML_SHIFT)) &&
1884 + (mix->shadow_regs[AUDCNTL_INDEX] &
1885 + (3 << TSC2301_INMR_SHIFT)))
1886 + /* both ADC channels use other than mic input. Power
1887 + * down the mic bias output */
1888 + pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
1889 + else
1890 + pd_ctrl &= ~TSC2301_REG_PD_MISC_MIBPD;
1891 + }
1892 +
1893 + /* power control decisions based on codec usage and user space mixer
1894 + * selections detected above */
1895 + pd_ctrl &= ~TSC2301_REG_PD_MISC_APD; /* audio not powered down */
1896 + if (mix->mclk_enabled) {
1897 + if (!mix->adc_enabled) {
1898 + /* ADC not used, power down both ADC's and mic bias
1899 + * output independently of user space mixer
1900 + * selections */
1901 + pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
1902 + pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
1903 + pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
1904 + }
1905 + if (!mix->dac_enabled) {
1906 + /* DAC not used, power down DAC independently of user
1907 + * space mixer selections */
1908 + pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
1909 + }
1910 +
1911 + if (mix->pll_output) {
1912 + /* GPIO_0 is configured as PLL output so audio
1913 + * controller is expecting clock from TSC2301. Either
1914 + * ADC or DAC must be active in order to keep PLL on */
1915 + if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
1916 + (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
1917 + (pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
1918 + /* neither ADC or DAC used. Force ADC on in
1919 + * order to keep PLL active */
1920 + pd_ctrl &= ~(TSC2301_REG_PD_MISC_ADPDL |
1921 + TSC2301_REG_PD_MISC_ADPDR);
1922 + }
1923 + }
1924 + } else {
1925 + /* audio input clock is not enabled so power down DAC and ADC
1926 + * in order to shutdown PLL and to keep touchscreen and keypad
1927 + * parts working. Touchscreen and keypad use audio clock when
1928 + * PLL is on and internal clock otherwise */
1929 + pd_ctrl |= TSC2301_REG_PD_MISC_DAPD |
1930 + TSC2301_REG_PD_MISC_ADPDL |
1931 + TSC2301_REG_PD_MISC_ADPDR;
1932 + }
1933 +
1934 + if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
1935 + (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
1936 + (pd_ctrl & TSC2301_REG_PD_MISC_DAPD) &&
1937 + (pd_ctrl & TSC2301_REG_PD_MISC_ABPD)) {
1938 + /* all ADC, DAC and line bypass path unused. Power down the
1939 + * whole audio part of the TSC2301 */
1940 + pd_ctrl |= TSC2301_REG_PD_MISC_APD;
1941 + }
1942 +
1943 + if (pd_ctrl == pd_ctrl_old)
1944 + return;
1945 +
1946 + /* power down control changed. Update into TSC2301 */
1947 + if ((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_APD) {
1948 + /* whole audio power state changed. Update GPIO states */
1949 + if (pd_ctrl & TSC2301_REG_PD_MISC_APD) {
1950 + /* power down GPIO controls before powering down
1951 + * the codec */
1952 + tsc2301_gpio_power_down(tsc);
1953 + /* we must really ensure that codec has been on no less
1954 + * than 100 msec before doing power-down */
1955 + timeout = mix->pu_jiffies + TSC2301_MIN_PU_PERIOD -
1956 + jiffies;
1957 + if (timeout <= TSC2301_MIN_PU_PERIOD) {
1958 + mix->delayed_pd_active = 1;
1959 + mix->mclk_enabled++;
1960 + schedule_delayed_work(&mix->delayed_power_down,
1961 + timeout + 1);
1962 + return;
1963 + }
1964 + } else
1965 + /* restore GPIOs after codec is powered up */
1966 + power_up = 1;
1967 + }
1968 + mix->shadow_regs[PD_MISC_INDEX] = pd_ctrl;
1969 + tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC, pd_ctrl);
1970 + if (power_up)
1971 + mix->pu_jiffies = jiffies;
1972 + if (!poll_pdsts) {
1973 + if (power_up)
1974 + tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
1975 + mix->shadow_regs[GPIO_INDEX]);
1976 + return;
1977 + }
1978 +
1979 + /* wait until power-up/-down is completed */
1980 + timeout = jiffies + msecs_to_jiffies(100);
1981 + w = 0;
1982 + do {
1983 + if (time_after(jiffies, timeout)) {
1984 + /* Print a warning only if the I2S clock is not
1985 + * present / out of sync. This can happen during
1986 + * init time, when that clock will be turned on
1987 + * by another driver like in the OMAP EAC with
1988 + * external clock case.
1989 + */
1990 + if (w & TSC2301_REG_PD_MISC_OTSYN) {
1991 + dev_warn(&tsc->spi->dev,
1992 + "I2S clock not in sync or off.\n");
1993 + } else {
1994 + dev_err(&tsc->spi->dev,
1995 + "power-up/-down timed out "
1996 + "(0x%04x, 0x%04x -> 0x%04x)\n",
1997 + w, pd_ctrl_old, pd_ctrl);
1998 + }
1999 + goto out;
2000 + }
2001 + w = tsc2301_read_reg(tsc, TSC2301_REG_PD_MISC);
2002 + } while (!(w & TSC2301_REG_PD_MISC_PDSTS));
2003 +
2004 +out:
2005 + if (((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_DAPD) &&
2006 + !(pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
2007 + /* DAC powered up now. Ensure that DAC and audio outputs are
2008 + * activated. They are up 100 msec after the chip power-up
2009 + * command */
2010 + timeout = mix->pu_jiffies + TSC2301_DAC_DELAY - jiffies;
2011 + if (timeout <= TSC2301_DAC_DELAY)
2012 + schedule_timeout_interruptible(timeout);
2013 + /* FIXME: This is lazy. We restore GPIOs only after activating
2014 + * the DAC. It would be better to do some kind of delayed GPIO
2015 + * restore. That ensures that we restore them also if only ADC
2016 + * path is activated. But this is required only if there is
2017 + * some input amplifier, bias control, etc. and their power
2018 + * state is under TSC GPIO control */
2019 + tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
2020 + mix->shadow_regs[GPIO_INDEX]);
2021 + }
2022 +}
2023 +
2024 +static int snd_tsc2301_info_single(struct snd_kcontrol *kcontrol,
2025 + struct snd_ctl_elem_info *uinfo)
2026 +{
2027 + int mask = TSC2301_SINGLE_MASK(kcontrol->private_value);
2028 + int minval = TSC2301_SINGLE_MINVAL(kcontrol->private_value);
2029 +
2030 + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2031 + uinfo->count = 1;
2032 + uinfo->value.integer.min = minval;
2033 + uinfo->value.integer.max = mask;
2034 +
2035 + return 0;
2036 +}
2037 +
2038 +static int snd_tsc2301_get_single(struct snd_kcontrol *kcontrol,
2039 + struct snd_ctl_elem_value *ucontrol)
2040 +{
2041 + struct tsc2301 *tsc = kcontrol->private_data;
2042 + unsigned long priv = kcontrol->private_value;
2043 + int mask = TSC2301_SINGLE_MASK(priv);
2044 + int shift = TSC2301_SINGLE_SHIFT(priv);
2045 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2046 + u16 shadow_reg;
2047 +
2048 + shadow_reg = tsc->mixer->shadow_regs[shadow_index];
2049 +
2050 + ucontrol->value.integer.value[0] = (shadow_reg >> shift) & mask;
2051 +
2052 + return 0;
2053 +}
2054 +
2055 +static int snd_tsc2301_put_single(struct snd_kcontrol *kcontrol,
2056 + struct snd_ctl_elem_value *ucontrol)
2057 +{
2058 + struct tsc2301 *tsc = kcontrol->private_data;
2059 + unsigned long priv = kcontrol->private_value;
2060 + int mask = TSC2301_SINGLE_MASK(priv);
2061 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2062 + u16 shadow_reg, shadow_reg_old;
2063 + int shift = TSC2301_SINGLE_SHIFT(priv);
2064 + int reg = TSC2301_PVAL_TO_REG(priv);
2065 + int changed;
2066 +
2067 + mutex_lock(&tsc->mixer->mutex);
2068 + shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
2069 +
2070 + /* zero bits to be modified */
2071 + shadow_reg &= ~(mask << shift);
2072 + /* modify with new value */
2073 + shadow_reg |= ((ucontrol->value.integer.value[0] & mask) << shift);
2074 +
2075 + changed = (shadow_reg != shadow_reg_old);
2076 + tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
2077 +
2078 + /* update into TSC2301 if necessary */
2079 + if (changed)
2080 + tsc2301_write_reg(tsc, reg, shadow_reg);
2081 + mutex_unlock(&tsc->mixer->mutex);
2082 +
2083 + return changed;
2084 +}
2085 +
2086 +static int snd_tsc2301_info_double(struct snd_kcontrol *kcontrol,
2087 + struct snd_ctl_elem_info *uinfo)
2088 +{
2089 + /* mask == 1 : Switch
2090 + * mask > 1 : Max volume */
2091 + int mask = TSC2301_DOUBLE_MASK(kcontrol->private_value);
2092 + int minval = TSC2301_DOUBLE_MINVAL(kcontrol->private_value);
2093 +
2094 + uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN :
2095 + SNDRV_CTL_ELEM_TYPE_INTEGER;
2096 + uinfo->count = 2;
2097 + uinfo->value.integer.min = minval;
2098 + uinfo->value.integer.max = mask;
2099 +
2100 + return 0;
2101 +}
2102 +
2103 +static int snd_tsc2301_get_double(struct snd_kcontrol *kcontrol,
2104 + struct snd_ctl_elem_value *ucontrol)
2105 +{
2106 + struct tsc2301 *tsc = kcontrol->private_data;
2107 + unsigned long priv = kcontrol->private_value;
2108 + /* mask == 1 : Switch
2109 + * mask > 1 : Volume */
2110 + int mask = TSC2301_DOUBLE_MASK(priv);
2111 + int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
2112 + int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
2113 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2114 + u16 shadow_reg;
2115 +
2116 + shadow_reg = tsc->mixer->shadow_regs[shadow_index];
2117 +
2118 + /* invert mute bits for the switches */
2119 + if (mask == 1)
2120 + shadow_reg = ~shadow_reg;
2121 +
2122 + ucontrol->value.integer.value[0] = (shadow_reg >> ls) & mask;
2123 + ucontrol->value.integer.value[1] = (shadow_reg >> rs) & mask;
2124 +
2125 + return 0;
2126 +}
2127 +
2128 +static int snd_tsc2301_put_double(struct snd_kcontrol *kcontrol,
2129 + struct snd_ctl_elem_value *ucontrol)
2130 +{
2131 + struct tsc2301 *tsc = kcontrol->private_data;
2132 + unsigned long priv = kcontrol->private_value;
2133 + /* mask == 1 : Switch
2134 + * mask > 1 : Volume */
2135 + int mask = TSC2301_DOUBLE_MASK(priv);
2136 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2137 + u16 shadow_reg, shadow_reg_old;
2138 + int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
2139 + int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
2140 + int reg = TSC2301_PVAL_TO_REG(priv);
2141 + int changed;
2142 +
2143 + mutex_lock(&tsc->mixer->mutex);
2144 + shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
2145 +
2146 + /* zero bits to be modified */
2147 + shadow_reg &= ~((mask << ls) | (mask << rs));
2148 + /* modify with new value */
2149 + if (mask == 1) {
2150 + /* switch. Invert switch values for the mute bits */
2151 + shadow_reg |=
2152 + ((~ucontrol->value.integer.value[0] & mask) << ls) |
2153 + ((~ucontrol->value.integer.value[1] & mask) << rs);
2154 + } else {
2155 + /* volume */
2156 + shadow_reg |=
2157 + (ucontrol->value.integer.value[0] << ls) |
2158 + (ucontrol->value.integer.value[1] << rs);
2159 + }
2160 +
2161 + changed = (shadow_reg != shadow_reg_old);
2162 + tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
2163 +
2164 + /* update into TSC2301 if necessary */
2165 + if (changed)
2166 + tsc2301_write_reg(tsc, reg, shadow_reg);
2167 +
2168 + if (mask == 1)
2169 + /* check is need to power down/up audio blocks in case of
2170 + * muted state change */
2171 + tsc2301_power_ctrl(tsc, shadow_index, 0);
2172 + mutex_unlock(&tsc->mixer->mutex);
2173 +
2174 + return changed;
2175 +}
2176 +
2177 +static int snd_tsc2301_info_mux(struct snd_kcontrol *kcontrol,
2178 + struct snd_ctl_elem_info *uinfo)
2179 +{
2180 + static char *texts[4] = {"Mic", "Line", "Line swapped", "Line mono"};
2181 +
2182 + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2183 + uinfo->count = 2;
2184 + uinfo->value.enumerated.items = 4;
2185 + if (uinfo->value.enumerated.item > 3)
2186 + uinfo->value.enumerated.item = 3;
2187 + strcpy(uinfo->value.enumerated.name,
2188 + texts[uinfo->value.enumerated.item]);
2189 +
2190 + return 0;
2191 +}
2192 +
2193 +static int snd_tsc2301_get_mux(struct snd_kcontrol *kcontrol,
2194 + struct snd_ctl_elem_value *ucontrol)
2195 +{
2196 + struct tsc2301 *tsc = kcontrol->private_data;
2197 + unsigned long priv = kcontrol->private_value;
2198 + int mask = TSC2301_MUX_MASK(priv);
2199 + int ls = TSC2301_MUX_LEFT_SHIFT(priv);
2200 + int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
2201 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2202 + u16 shadow_reg;
2203 +
2204 + shadow_reg = tsc->mixer->shadow_regs[shadow_index];
2205 + ucontrol->value.enumerated.item[0] = (shadow_reg >> ls) & mask;
2206 + ucontrol->value.enumerated.item[1] = (shadow_reg >> rs) & mask;
2207 +
2208 + return 0;
2209 +}
2210 +
2211 +static int snd_tsc2301_put_mux(struct snd_kcontrol *kcontrol,
2212 + struct snd_ctl_elem_value *ucontrol)
2213 +{
2214 + struct tsc2301 *tsc = kcontrol->private_data;
2215 + unsigned long priv = kcontrol->private_value;
2216 + int mask = TSC2301_MUX_MASK(priv);
2217 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2218 + u16 shadow_reg, shadow_reg_old;
2219 + int ls = TSC2301_MUX_LEFT_SHIFT(priv);
2220 + int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
2221 + int reg = TSC2301_PVAL_TO_REG(priv);
2222 + int changed;
2223 +
2224 + mutex_lock(&tsc->mixer->mutex);
2225 + shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
2226 +
2227 + /* zero bits to be modified */
2228 + shadow_reg &= ~((mask << ls) | (mask << rs));
2229 + /* modify with new value */
2230 + shadow_reg |= (ucontrol->value.enumerated.item[0] << ls);
2231 + shadow_reg |= (ucontrol->value.enumerated.item[1] << rs);
2232 +
2233 + changed = (shadow_reg != shadow_reg_old);
2234 +
2235 + /* update into TSC2301 if necessary */
2236 + if (changed) {
2237 + tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
2238 + tsc2301_write_reg(tsc, reg, shadow_reg);
2239 + }
2240 +
2241 + /* check is need to power up/down audio blocks in case of ADC input
2242 + * change */
2243 + tsc2301_power_ctrl(tsc, shadow_index, 0);
2244 + mutex_unlock(&tsc->mixer->mutex);
2245 +
2246 + return changed;
2247 +}
2248 +
2249 +static int snd_tsc2301_info_bool(struct snd_kcontrol *kcontrol,
2250 + struct snd_ctl_elem_info *uinfo)
2251 +{
2252 + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2253 + uinfo->count = 1;
2254 + uinfo->value.integer.min = 0;
2255 + uinfo->value.integer.max = 1;
2256 +
2257 + return 0;
2258 +}
2259 +
2260 +static int snd_tsc2301_get_bool(struct snd_kcontrol *kcontrol,
2261 + struct snd_ctl_elem_value *ucontrol)
2262 +{
2263 + struct tsc2301 *tsc = kcontrol->private_data;
2264 + unsigned long priv = kcontrol->private_value;
2265 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2266 + int shift = TSC2301_BOOL_SHIFT(priv);
2267 + int invert = TSC2301_BOOL_INVERT(priv);
2268 + u16 shadow_reg;
2269 +
2270 + shadow_reg = tsc->mixer->shadow_regs[shadow_index];
2271 + ucontrol->value.integer.value[0] =
2272 + invert ^ ((shadow_reg >> shift) & 1);
2273 +
2274 + return 0;
2275 +}
2276 +
2277 +static int snd_tsc2301_put_bool(struct snd_kcontrol *kcontrol,
2278 + struct snd_ctl_elem_value *ucontrol)
2279 +{
2280 + struct tsc2301 *tsc = kcontrol->private_data;
2281 + unsigned long priv = kcontrol->private_value;
2282 + int shadow_index = TSC2301_SHADOW_INDEX(priv);
2283 + int shift = TSC2301_BOOL_SHIFT(priv);
2284 + int invert = TSC2301_BOOL_INVERT(priv);
2285 + int reg = TSC2301_PVAL_TO_REG(priv);
2286 + u16 shadow_reg, shadow_reg_old;
2287 + int changed;
2288 +
2289 + mutex_lock(&tsc->mixer->mutex);
2290 + shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
2291 +
2292 + /* zero bit to be modified */
2293 + shadow_reg &= ~(1 << shift);
2294 + /* modify with new value */
2295 + shadow_reg |=
2296 + (invert ^ (ucontrol->value.integer.value[0] & 1)) << shift;
2297 +
2298 + changed = (shadow_reg != shadow_reg_old);
2299 +
2300 + /* update into TSC2301 if necessary */
2301 + if (changed) {
2302 + tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
2303 + if ((shadow_index == GPIO_INDEX) &&
2304 + (tsc->mixer->shadow_regs[PD_MISC_INDEX] &
2305 + TSC2301_REG_PD_MISC_APD)) {
2306 + /* changing GPIO control and audio is powered down.
2307 + * Update GPIO states according to their power-down
2308 + * flag */
2309 + tsc2301_gpio_power_down(tsc);
2310 + } else
2311 + tsc2301_write_reg(tsc, reg, shadow_reg);
2312 + }
2313 + mutex_unlock(&tsc->mixer->mutex);
2314 +
2315 + return changed;
2316 +}
2317 +
2318 +/* TSC2301 internal mixer controls */
2319 +static struct snd_kcontrol_new snd_tsc2301_controls[] = {
2320 + /* stereo ADC input switches and volumes */
2321 + TSC2301_DOUBLE("Capture Switch", 0,
2322 + TSC2301_REG_ADCVOL, ADCVOL_INDEX,
2323 + TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
2324 + 1, 0),
2325 + TSC2301_DOUBLE("Capture Volume", 0,
2326 + TSC2301_REG_ADCVOL, ADCVOL_INDEX,
2327 + TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
2328 + TSC2301_VOLUME_MASK, TSC2301_MIN_ADCVOL),
2329 +
2330 + /* stereo DAC output switches and volumes */
2331 + TSC2301_DOUBLE("PCM Playback Switch", 0,
2332 + TSC2301_REG_DACVOL, DACVOL_INDEX,
2333 + TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
2334 + 1, 0),
2335 + TSC2301_DOUBLE("PCM Playback Volume", 0,
2336 + TSC2301_REG_DACVOL, DACVOL_INDEX,
2337 + TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
2338 + TSC2301_VOLUME_MASK, TSC2301_MIN_DACVOL),
2339 +
2340 + /* stereo line input bypass switches and volumes */
2341 + TSC2301_DOUBLE("Line Playback Switch", 0,
2342 + TSC2301_REG_BPVOL, BPVOL_INDEX,
2343 + TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
2344 + 1, 0),
2345 + TSC2301_DOUBLE("Line Playback Volume", 0,
2346 + TSC2301_REG_BPVOL, BPVOL_INDEX,
2347 + TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
2348 + TSC2301_VOLUME_MASK, TSC2301_MIN_BPVOL),
2349 +
2350 + /* mono microphone input gain */
2351 + TSC2301_SINGLE("Mic Boost", 0,
2352 + TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
2353 + TSC2301_MICG_SHIFT,
2354 + TSC2301_MICG_MASK, TSC2301_MICG_MIN),
2355 +
2356 + /* ADC input sources. Both channels could be selected separately */
2357 + TSC2301_MUX("Capture Source", 0,
2358 + TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
2359 + TSC2301_INML_SHIFT, TSC2301_INMR_SHIFT,
2360 + TSC2301_INM_MASK),
2361 +};
2362 +
2363 +/* must be called tsc->mixer->mutex locked */
2364 +static void tsc2301_flush_shadow_regs(struct tsc2301 *tsc)
2365 +{
2366 + int i, page, addr;
2367 + u16 temp;
2368 +
2369 + page = TSC2301_REG_TO_PAGE(TSC2301_REG_AUDCNTL);
2370 + addr = TSC2301_REG_TO_ADDR(TSC2301_REG_AUDCNTL);
2371 +
2372 + for (i = 0; i < 4; i++) {
2373 + temp = tsc->mixer->shadow_regs[i];
2374 + tsc2301_write_reg(tsc, TSC2301_REG(page, addr + i), temp);
2375 + }
2376 + temp = tsc->mixer->shadow_regs[GPIO_INDEX];
2377 + tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
2378 +
2379 + /* Update power state of all audio blocks depending are they
2380 + * muted or unused. */
2381 + tsc2301_power_ctrl(tsc, -1, 0);
2382 +}
2383 +
2384 +#ifdef CONFIG_PM
2385 +int tsc2301_mixer_suspend(struct tsc2301 *tsc)
2386 +{
2387 + /* power down entire audio section inside TSC2301 in case the
2388 + * chip is still powered during the system sleep. However this driver
2389 + * doesn't require that chip is powered because registers are restored
2390 + * in function tsc2301_mixer_resume */
2391 + mutex_lock(&tsc->mixer->mutex);
2392 + tsc2301_gpio_power_down(tsc);
2393 + tsc->mixer->shadow_regs[PD_MISC_INDEX] |= TSC2301_REG_PD_MISC_APD;
2394 + tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC,
2395 + tsc->mixer->shadow_regs[PD_MISC_INDEX]);
2396 + mutex_unlock(&tsc->mixer->mutex);
2397 + return 0;
2398 +}
2399 +
2400 +void tsc2301_mixer_resume(struct tsc2301 *tsc)
2401 +{
2402 + /* power up the TSC2301 audio section and restore registers */
2403 + mutex_lock(&tsc->mixer->mutex);
2404 + tsc->mixer->shadow_regs[PD_MISC_INDEX] &= ~TSC2301_REG_PD_MISC_APD;
2405 + tsc2301_flush_shadow_regs(tsc);
2406 + mutex_unlock(&tsc->mixer->mutex);
2407 +}
2408 +#endif
2409 +
2410 +void tsc2301_mixer_enable_mclk(struct device *dev)
2411 +{
2412 + struct tsc2301 *tsc = dev_get_drvdata(dev);
2413 + struct tsc2301_mixer *mix = tsc->mixer;
2414 +
2415 + mutex_lock(&mix->mutex);
2416 + if (!mix->mclk_enabled++ && tsc->enable_clock != NULL) {
2417 + tsc->enable_clock(dev);
2418 + }
2419 + tsc2301_power_ctrl(tsc, -1, 1);
2420 + mutex_unlock(&mix->mutex);
2421 +}
2422 +
2423 +void tsc2301_mixer_disable_mclk(struct device *dev)
2424 +{
2425 + struct tsc2301 *tsc = dev_get_drvdata(dev);
2426 + struct tsc2301_mixer *mix = tsc->mixer;
2427 +
2428 + mutex_lock(&mix->mutex);
2429 + mix->mclk_enabled--;
2430 + tsc2301_power_ctrl(tsc, -1, 1);
2431 + if (!mix->mclk_enabled && tsc->disable_clock != NULL) {
2432 + tsc->disable_clock(dev);
2433 + }
2434 + mutex_unlock(&mix->mutex);
2435 +}
2436 +
2437 +static void tsc2301_mixer_delayed_power_down(struct work_struct *work)
2438 +{
2439 + struct tsc2301_mixer *mix = container_of(work, struct tsc2301_mixer,
2440 + delayed_power_down.work);
2441 + struct tsc2301 *tsc = mix->tsc;
2442 +
2443 + mutex_lock(&mix->mutex);
2444 + if (!mix->delayed_pd_active) {
2445 + mutex_unlock(&mix->mutex);
2446 + return;
2447 + }
2448 + mix->delayed_pd_active = 0;
2449 + mutex_unlock(&mix->mutex);
2450 + tsc2301_mixer_disable_mclk(&tsc->spi->dev);
2451 +}
2452 +
2453 +/*
2454 + * Allows audio controller driver to notify its usage of ADC and DAC
2455 + */
2456 +void tsc2301_mixer_set_power(struct device *dev, int dac, int adc)
2457 +{
2458 + struct tsc2301 *tsc = dev_get_drvdata(dev);
2459 +
2460 + mutex_lock(&tsc->mixer->mutex);
2461 + tsc->mixer->adc_enabled = adc;
2462 + tsc->mixer->dac_enabled = dac;
2463 +
2464 + /* update power state of all audio blocks */
2465 + tsc2301_power_ctrl(tsc, -1, 1);
2466 + mutex_unlock(&tsc->mixer->mutex);
2467 +}
2468 +
2469 +/*
2470 + * Registers TSC2301 ALSA Mixer controls for the given sound card
2471 + */
2472 +int tsc2301_mixer_register_controls(struct device *dev, struct snd_card *card)
2473 +{
2474 + struct tsc2301 *tsc = dev_get_drvdata(dev);
2475 + struct tsc2301_mixer *mix = tsc->mixer;
2476 + int i, err;
2477 +
2478 + /* Register ALSA mixer controls */
2479 + for (i = 0; i < ARRAY_SIZE(snd_tsc2301_controls); i++) {
2480 + err = snd_ctl_add(card,
2481 + snd_ctl_new1(&snd_tsc2301_controls[i], tsc));
2482 + if (err < 0)
2483 + return err;
2484 + }
2485 +
2486 + if (!mix->n_mixer_gpios)
2487 + return 0;
2488 +
2489 + /* Register additional GPIO controls if defined */
2490 + for (i = 0; i < mix->n_mixer_gpios; i++) {
2491 + const struct tsc2301_mixer_gpio *mg = mix->mixer_gpios + i;
2492 + struct snd_kcontrol *ctrlp;
2493 + struct snd_kcontrol_new ctrl =
2494 + TSC2301_BOOL((char *)mg->name, 0,
2495 + TSC2301_REG_GPIO, GPIO_INDEX,
2496 + mg->gpio, mg->inverted, mg->def_enable);
2497 +
2498 + ctrlp = snd_ctl_new1(&ctrl, tsc);
2499 + err = snd_ctl_add(card, ctrlp);
2500 + if (err < 0)
2501 + return err;
2502 + }
2503 +
2504 + return 0;
2505 +}
2506 +
2507 +int tsc2301_mixer_init(struct tsc2301 *tsc,
2508 + struct tsc2301_platform_data *pdata)
2509 +{
2510 + struct tsc2301_mixer *mix;
2511 + int err = 0;
2512 + u16 w;
2513 +
2514 + mix = kzalloc(sizeof(*mix), GFP_KERNEL);
2515 + if (mix == NULL)
2516 + return -ENOMEM;
2517 + tsc->mixer = mix;
2518 +
2519 + mix->tsc = tsc;
2520 + mutex_init(&mix->mutex);
2521 + mix->platform_init = pdata->codec_init;
2522 + mix->platform_cleanup = pdata->codec_cleanup;
2523 + mix->pll_output = pdata->pll_output;
2524 +
2525 + INIT_DELAYED_WORK(&mix->delayed_power_down,
2526 + tsc2301_mixer_delayed_power_down);
2527 +
2528 + /* initialize shadow register default values */
2529 + w = 0xc000;
2530 + w |= (pdata->mclk_ratio << 6) | (pdata->i2s_sample_rate << 2);
2531 + w |= pdata->i2s_format;
2532 + mix->shadow_regs[AUDCNTL_INDEX] = w;
2533 + mix->shadow_regs[ADCVOL_INDEX] = 0xd7d7;
2534 + mix->shadow_regs[DACVOL_INDEX] = 0xffff;
2535 + mix->shadow_regs[BPVOL_INDEX] = 0xe7e7;
2536 + mix->shadow_regs[PD_MISC_INDEX] = pdata->power_down_blocks;
2537 +
2538 + /* if extra mixer controls configured, then configure associated
2539 + * GPIOs as output and drive their default state */
2540 + if (pdata->n_mixer_gpios) {
2541 + int i;
2542 +
2543 + w = 0;
2544 + for (i = 0; i < pdata->n_mixer_gpios; i++) {
2545 + const struct tsc2301_mixer_gpio *mg;
2546 + int gpio;
2547 +
2548 + mg = pdata->mixer_gpios + i;
2549 + gpio = mg->gpio;
2550 + w |= (1 << gpio) << 8;
2551 + w |= (mg->inverted ^ mg->def_enable) << gpio;
2552 + }
2553 + mix->shadow_regs[GPIO_INDEX] = w;
2554 +
2555 + mix->mixer_gpios = kmalloc(sizeof(*pdata->mixer_gpios) *
2556 + pdata->n_mixer_gpios,
2557 + GFP_KERNEL);
2558 + if (mix->mixer_gpios == NULL) {
2559 + err = -ENOMEM;
2560 + goto err1;
2561 + }
2562 + memcpy(mix->mixer_gpios, pdata->mixer_gpios,
2563 + sizeof(*pdata->mixer_gpios) * pdata->n_mixer_gpios);
2564 + mix->n_mixer_gpios = pdata->n_mixer_gpios;
2565 + }
2566 +
2567 + /* PLL control */
2568 + tsc2301_write_pll(tsc, pdata->pll_n, pdata->pll_a, pdata->pll_pdc,
2569 + 0, mix->pll_output ? 0 : 1);
2570 +
2571 + tsc2301_flush_shadow_regs(tsc);
2572 +
2573 + if (mix->platform_init != NULL) {
2574 + err = mix->platform_init(&tsc->spi->dev);
2575 + if (err < 0)
2576 + goto err2;
2577 + }
2578 +
2579 + return 0;
2580 +err2:
2581 + if (mix->mixer_gpios != NULL)
2582 + kfree(mix->mixer_gpios);
2583 +err1:
2584 + kfree(mix);
2585 + return err;
2586 +}
2587 +
2588 +void tsc2301_mixer_exit(struct tsc2301 *tsc)
2589 +{
2590 + struct tsc2301_mixer *mixer = tsc->mixer;
2591 +
2592 + if (mixer->platform_cleanup != NULL)
2593 + mixer->platform_cleanup(&tsc->spi->dev);
2594 +
2595 + if (mixer->mixer_gpios != NULL)
2596 + kfree(mixer->mixer_gpios);
2597 +}
2598 +
2599 +MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@nokia.com>");
2600 +MODULE_LICENSE("GPL");
2601 Index: linux-3.1-rc4/include/linux/spi/tsc2301.h
2602 ===================================================================
2603 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
2604 +++ linux-3.1-rc4/include/linux/spi/tsc2301.h 2011-10-29 22:14:10.448812502 +0200
2605 @@ -0,0 +1,208 @@
2606 +#ifndef _LINUX_SPI_TSC2301_H
2607 +#define _LINUX_SPI_TSC2301_H
2608 +
2609 +#include <linux/types.h>
2610 +#include <linux/timer.h>
2611 +
2612 +struct tsc2301_platform_data {
2613 + /*
2614 + * Keypad
2615 + */
2616 + s16 reset_gpio;
2617 + s16 keyb_int;
2618 + s16 keymap[16]; /* Set a key to a negative value if not used */
2619 + unsigned kp_rep:1; /* Enable keypad repeating */
2620 + char *keyb_name; /* Keyboard device name */
2621 +
2622 + /*
2623 + * Touchscreen
2624 + */
2625 + s16 dav_int;
2626 + u16 ts_x_plate_ohm;
2627 + u32 ts_stab_time; /* voltage settling time */
2628 + u8 ts_hw_avg; /* HW assiseted averaging. Can be
2629 + 0, 4, 8, 16 samples per reading */
2630 + u32 ts_max_pressure;/* Samples with bigger pressure value will
2631 + be ignored, since the corresponding X, Y
2632 + values are unreliable */
2633 + u32 ts_touch_pressure; /* Pressure limit until we report a
2634 + touch event. After that we switch
2635 + to ts_max_pressure. */
2636 + u32 ts_pressure_fudge;
2637 + u32 ts_x_max;
2638 + u32 ts_x_fudge;
2639 + u32 ts_y_max;
2640 + u32 ts_y_fudge;
2641 +
2642 + /*
2643 + * Audio
2644 + */
2645 + unsigned pll_pdc:4;
2646 + unsigned pll_a:4;
2647 + unsigned pll_n:4;
2648 + unsigned pll_output:1; /* Output PLL on GPIO_0 */
2649 +
2650 + unsigned mclk_ratio:2;
2651 + unsigned i2s_sample_rate:4;
2652 + unsigned i2s_format:2;
2653 + /* Mask for audio blocks to be powered down */
2654 + u16 power_down_blocks;
2655 +
2656 + /* Called after codec has been initialized, can be NULL */
2657 + int (* codec_init)(struct device *tsc2301_dev);
2658 + /* Called when codec is being removed, can be NULL */
2659 + void (* codec_cleanup)(struct device *tsc2301_dev);
2660 + int (*enable_clock)(struct device *dev);
2661 + void (*disable_clock)(struct device *dev);
2662 +
2663 + const struct tsc2301_mixer_gpio {
2664 + const char *name;
2665 + unsigned gpio:4;
2666 + unsigned inverted:1;
2667 + unsigned def_enable:1; /* enable by default */
2668 + unsigned deactivate_on_pd:1; /* power-down flag */
2669 + } *mixer_gpios;
2670 + int n_mixer_gpios;
2671 +};
2672 +
2673 +struct tsc2301_kp;
2674 +struct tsc2301_ts;
2675 +struct tsc2301_mixer;
2676 +
2677 +struct tsc2301 {
2678 + struct spi_device *spi;
2679 +
2680 + s16 reset_gpio;
2681 + u16 config2_shadow;
2682 +
2683 + struct tsc2301_kp *kp;
2684 + struct tsc2301_ts *ts;
2685 + struct tsc2301_mixer *mixer;
2686 +
2687 + int (*enable_clock)(struct device *dev);
2688 + void (*disable_clock)(struct device *dev);
2689 +};
2690 +
2691 +
2692 +#define TSC2301_HZ 33000000
2693 +
2694 +#define TSC2301_REG(page, addr) (((page) << 11) | ((addr) << 5))
2695 +#define TSC2301_REG_TO_PAGE(reg) (((reg) >> 11) & 0x03)
2696 +#define TSC2301_REG_TO_ADDR(reg) (((reg) >> 5) & 0x1f)
2697 +
2698 +#define TSC2301_REG_X TSC2301_REG(0, 0)
2699 +#define TSC2301_REG_Y TSC2301_REG(0, 1)
2700 +#define TSC2301_REG_Z1 TSC2301_REG(0, 2)
2701 +#define TSC2301_REG_Z2 TSC2301_REG(0, 3)
2702 +#define TSC2301_REG_KPDATA TSC2301_REG(0, 4)
2703 +#define TSC2301_REG_ADC TSC2301_REG(1, 0)
2704 +#define TSC2301_REG_KEY TSC2301_REG(1, 1)
2705 +#define TSC2301_REG_DAC TSC2301_REG(1, 2)
2706 +#define TSC2301_REG_REF TSC2301_REG(1, 3)
2707 +#define TSC2301_REG_RESET TSC2301_REG(1, 4)
2708 +#define TSC2301_REG_CONFIG TSC2301_REG(1, 5)
2709 +#define TSC2301_REG_CONFIG2 TSC2301_REG(1, 6)
2710 +#define TSC2301_REG_KPMASK TSC2301_REG(1, 16)
2711 +#define TSC2301_REG_AUDCNTL TSC2301_REG(2, 0)
2712 +#define TSC2301_REG_ADCVOL TSC2301_REG(2, 1)
2713 +#define TSC2301_REG_DACVOL TSC2301_REG(2, 2)
2714 +#define TSC2301_REG_BPVOL TSC2301_REG(2, 3)
2715 +#define TSC2301_REG_KEYCTL TSC2301_REG(2, 4)
2716 +#define TSC2301_REG_PD_MISC TSC2301_REG(2, 5)
2717 +#define TSC2301_REG_GPIO TSC2301_REG(2, 6)
2718 +#define TSC2301_REG_ADCLKCFG TSC2301_REG(2, 27)
2719 +
2720 +#define TSC2301_REG_PD_MISC_APD (1 << 15)
2721 +#define TSC2301_REG_PD_MISC_AVPD (1 << 14)
2722 +#define TSC2301_REG_PD_MISC_ABPD (1 << 13)
2723 +#define TSC2301_REG_PD_MISC_HAPD (1 << 12)
2724 +#define TSC2301_REG_PD_MISC_MOPD (1 << 11)
2725 +#define TSC2301_REG_PD_MISC_DAPD (1 << 10)
2726 +#define TSC2301_REG_PD_MISC_ADPDL (1 << 9)
2727 +#define TSC2301_REG_PD_MISC_ADPDR (1 << 8)
2728 +#define TSC2301_REG_PD_MISC_PDSTS (1 << 7)
2729 +#define TSC2301_REG_PD_MISC_MIBPD (1 << 6)
2730 +#define TSC2301_REG_PD_MISC_OTSYN (1 << 2)
2731 +
2732 +/* I2S sample rate */
2733 +#define TSC2301_I2S_SR_48000 0x00
2734 +#define TSC2301_I2S_SR_44100 0x01
2735 +#define TSC2301_I2S_SR_32000 0x02
2736 +#define TSC2301_I2S_SR_24000 0x03
2737 +#define TSC2301_I2S_SR_22050 0x04
2738 +#define TSC2301_I2S_SR_16000 0x05
2739 +#define TSC2301_I2S_SR_12000 0x06
2740 +#define TSC2301_I2S_SR_11050 0x07
2741 +#define TSC2301_I2S_SR_8000 0x08
2742 +
2743 +/* 16-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */
2744 +#define TSC2301_I2S_FORMAT0 0x00
2745 +/* 20-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */
2746 +#define TSC2301_I2S_FORMAT1 0x01
2747 +/* 20-bit, MSB-first. DAC Left-Justified, ADC Left-Justified */
2748 +#define TSC2301_I2S_FORMAT2 0x02
2749 +/* 20-bit, MSB-first */
2750 +#define TSC2301_I2S_FORMAT3 0x03
2751 +
2752 +/* Master Clock Ratio */
2753 +#define TSC2301_MCLK_256xFS 0x00 /* default */
2754 +#define TSC2301_MCLK_384xFS 0x01
2755 +#define TSC2301_MCLK_512xFS 0x02
2756 +
2757 +
2758 +extern u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg);
2759 +extern void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val);
2760 +extern void tsc2301_write_kbc(struct tsc2301 *tsc, int val);
2761 +extern void tsc2301_write_pll(struct tsc2301 *tsc, int pll_n, int pll_a,
2762 + int pll_pdc, int pct_e, int pll_o);
2763 +extern void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *buf, int len);
2764 +
2765 +#define TSC2301_DECL_MOD(module) \
2766 +extern int tsc2301_##module##_init(struct tsc2301 *tsc, \
2767 + struct tsc2301_platform_data *pdata); \
2768 +extern void tsc2301_##module##_exit(struct tsc2301 *tsc); \
2769 +extern int tsc2301_##module##_suspend(struct tsc2301 *tsc); \
2770 +extern void tsc2301_##module##_resume(struct tsc2301 *tsc);
2771 +
2772 +#define TSC2301_DECL_EMPTY_MOD(module) \
2773 +static inline int tsc2301_##module##_init(struct tsc2301 *tsc, \
2774 + struct tsc2301_platform_data *pdata) \
2775 +{ \
2776 + return 0; \
2777 +} \
2778 +static inline void tsc2301_##module##_exit(struct tsc2301 *tsc) {} \
2779 +static inline int tsc2301_##module##_suspend(struct tsc2301 *tsc) \
2780 +{ \
2781 + return 0; \
2782 +} \
2783 +static inline void tsc2301_##module##_resume(struct tsc2301 *tsc) {}
2784 +
2785 +#ifdef CONFIG_KEYBOARD_TSC2301
2786 +TSC2301_DECL_MOD(kp)
2787 +void tsc2301_kp_restart(struct tsc2301 *tsc);
2788 +#else
2789 +TSC2301_DECL_EMPTY_MOD(kp)
2790 +static inline void tsc2301_kp_restart(struct tsc2301 *tsc) {}
2791 +#endif
2792 +
2793 +#ifdef CONFIG_TOUCHSCREEN_TSC2301
2794 +TSC2301_DECL_MOD(ts)
2795 +#else
2796 +TSC2301_DECL_EMPTY_MOD(ts)
2797 +#endif
2798 +
2799 +#ifdef CONFIG_SPI_TSC2301_AUDIO
2800 +TSC2301_DECL_MOD(mixer)
2801 +extern void tsc2301_mixer_set_power(struct device *tsc_dev, int dac, int adc);
2802 +
2803 +struct snd_card;
2804 +extern int tsc2301_mixer_register_controls(struct device *tsc_dev,
2805 + struct snd_card *card);
2806 +#else
2807 +TSC2301_DECL_EMPTY_MOD(mixer)
2808 +#endif
2809 +
2810 +extern void tsc2301_mixer_enable_mclk(struct device *tsc_dev);
2811 +extern void tsc2301_mixer_disable_mclk(struct device *tsc_dev);
2812 +
2813 +#endif
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