diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch')
-rw-r--r-- | meta/recipes-kernel/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch | 2899 |
1 files changed, 2899 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch b/meta/recipes-kernel/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch new file mode 100644 index 0000000000..c918c5daff --- /dev/null +++ b/meta/recipes-kernel/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch | |||
@@ -0,0 +1,2899 @@ | |||
1 | Index: linux-2.6.17/drivers/input/touchscreen/Kconfig | ||
2 | =================================================================== | ||
3 | --- linux-2.6.17.orig/drivers/input/touchscreen/Kconfig 2006-09-19 20:35:35.060495500 +0200 | ||
4 | +++ linux-2.6.17/drivers/input/touchscreen/Kconfig 2006-09-19 20:36:47.965051750 +0200 | ||
5 | @@ -121,4 +121,57 @@ config TOUCHSCREEN_TSC2101 | ||
6 | To compile this driver as a module, choose M here: the | ||
7 | module will be called ads7846_ts. | ||
8 | |||
9 | +config TOUCHSCREEN_WM97XX | ||
10 | + tristate "Support for WM97xx AC97 touchscreen controllers" | ||
11 | + depends SND_AC97_BUS | ||
12 | + | ||
13 | +choice | ||
14 | + prompt "WM97xx codec type" | ||
15 | + | ||
16 | +config TOUCHSCREEN_WM9705 | ||
17 | + bool "WM9705 Touchscreen interface support" | ||
18 | + depends on TOUCHSCREEN_WM97XX | ||
19 | + help | ||
20 | + Say Y here if you have the wm9705 touchscreen. | ||
21 | + | ||
22 | + If unsure, say N. | ||
23 | + | ||
24 | + To compile this driver as a module, choose M here: the | ||
25 | + module will be called wm9705. | ||
26 | + | ||
27 | +config TOUCHSCREEN_WM9712 | ||
28 | + bool "WM9712 Touchscreen interface support" | ||
29 | + depends on TOUCHSCREEN_WM97XX | ||
30 | + help | ||
31 | + Say Y here if you have the wm9712 touchscreen. | ||
32 | + | ||
33 | + If unsure, say N. | ||
34 | + | ||
35 | + To compile this driver as a module, choose M here: the | ||
36 | + module will be called wm9712. | ||
37 | + | ||
38 | +config TOUCHSCREEN_WM9713 | ||
39 | + bool "WM9713 Touchscreen interface support" | ||
40 | + depends on TOUCHSCREEN_WM97XX | ||
41 | + help | ||
42 | + Say Y here if you have the wm9713 touchscreen. | ||
43 | + | ||
44 | + If unsure, say N. | ||
45 | + | ||
46 | + To compile this driver as a module, choose M here: the | ||
47 | + module will be called wm9713. | ||
48 | + | ||
49 | +endchoice | ||
50 | + | ||
51 | +config TOUCHSCREEN_WM97XX_PXA | ||
52 | + tristate "WM97xx PXA accelerated touch" | ||
53 | + depends on TOUCHSCREEN_WM97XX && ARCH_PXA | ||
54 | + help | ||
55 | + Say Y here for continuous mode touch on the PXA | ||
56 | + | ||
57 | + If unsure, say N | ||
58 | + | ||
59 | + To compile this driver as a module, choose M here: the | ||
60 | + module will be called pxa-wm97xx | ||
61 | + | ||
62 | endif | ||
63 | Index: linux-2.6.17/drivers/input/touchscreen/Makefile | ||
64 | =================================================================== | ||
65 | --- linux-2.6.17.orig/drivers/input/touchscreen/Makefile 2006-09-19 20:35:35.072496250 +0200 | ||
66 | +++ linux-2.6.17/drivers/input/touchscreen/Makefile 2006-09-19 20:37:40.540337500 +0200 | ||
67 | @@ -4,6 +4,8 @@ | ||
68 | |||
69 | # Each configuration option enables a list of files. | ||
70 | |||
71 | +wm97xx-ts-objs := wm97xx-core.o | ||
72 | + | ||
73 | obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o | ||
74 | obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o | ||
75 | obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o | ||
76 | @@ -13,3 +15,16 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtou | ||
77 | obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o | ||
78 | obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o | ||
79 | obj-$(CONFIG_TOUCHSCREEN_TSC2101) += tsc2101_ts.o | ||
80 | +obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o | ||
81 | +obj-$(CONFIG_TOUCHSCREEN_WM97XX_PXA) += pxa-wm97xx.o | ||
82 | + | ||
83 | +ifeq ($(CONFIG_TOUCHSCREEN_WM9713),y) | ||
84 | +wm97xx-ts-objs += wm9713.o | ||
85 | +endif | ||
86 | + | ||
87 | +ifeq ($(CONFIG_TOUCHSCREEN_WM9712),y) | ||
88 | +wm97xx-ts-objs += wm9712.o | ||
89 | +endif | ||
90 | +ifeq ($(CONFIG_TOUCHSCREEN_WM9705),y) | ||
91 | +wm97xx-ts-objs += wm9705.o | ||
92 | +endif | ||
93 | Index: linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c | ||
94 | =================================================================== | ||
95 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
96 | +++ linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c 2006-09-19 20:36:47.965051750 +0200 | ||
97 | @@ -0,0 +1,289 @@ | ||
98 | +/* | ||
99 | + * pxa-wm97xx.c -- pxa-wm97xx Continuous Touch screen driver for | ||
100 | + * Wolfson WM97xx AC97 Codecs. | ||
101 | + * | ||
102 | + * Copyright 2004 Wolfson Microelectronics PLC. | ||
103 | + * Author: Liam Girdwood | ||
104 | + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
105 | + * Parts Copyright : Ian Molton <spyro@f2s.com> | ||
106 | + * Andrew Zabolotny <zap@homelink.ru> | ||
107 | + * | ||
108 | + * This program is free software; you can redistribute it and/or modify it | ||
109 | + * under the terms of the GNU General Public License as published by the | ||
110 | + * Free Software Foundation; either version 2 of the License, or (at your | ||
111 | + * option) any later version. | ||
112 | + * | ||
113 | + * Notes: | ||
114 | + * This is a wm97xx extended touch driver to capture touch | ||
115 | + * data in a continuous manner on the Intel XScale archictecture | ||
116 | + * | ||
117 | + * Features: | ||
118 | + * - codecs supported:- WM9705, WM9712, WM9713 | ||
119 | + * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x | ||
120 | + * | ||
121 | + * Revision history | ||
122 | + * 18th Aug 2004 Initial version. | ||
123 | + * 26th Jul 2005 Improved continous read back and added FIFO flushing. | ||
124 | + * 06th Sep 2005 Mike Arthur <linux@wolfsonmicro.com> | ||
125 | + * Moved to using the wm97xx bus | ||
126 | + * | ||
127 | + */ | ||
128 | + | ||
129 | +#include <linux/module.h> | ||
130 | +#include <linux/moduleparam.h> | ||
131 | +#include <linux/version.h> | ||
132 | +#include <linux/kernel.h> | ||
133 | +#include <linux/init.h> | ||
134 | +#include <linux/delay.h> | ||
135 | +#include <linux/irq.h> | ||
136 | +#include <linux/wm97xx.h> | ||
137 | +#include <asm/io.h> | ||
138 | +#include <asm/arch/pxa-regs.h> | ||
139 | + | ||
140 | +#define VERSION "0.13" | ||
141 | + | ||
142 | +struct continuous { | ||
143 | + u16 id; /* codec id */ | ||
144 | + u8 code; /* continuous code */ | ||
145 | + u8 reads; /* number of coord reads per read cycle */ | ||
146 | + u32 speed; /* number of coords per second */ | ||
147 | +}; | ||
148 | + | ||
149 | +#define WM_READS(sp) ((sp / HZ) + 1) | ||
150 | + | ||
151 | +static const struct continuous cinfo[] = { | ||
152 | + {WM9705_ID2, 0, WM_READS(94), 94}, | ||
153 | + {WM9705_ID2, 1, WM_READS(188), 188}, | ||
154 | + {WM9705_ID2, 2, WM_READS(375), 375}, | ||
155 | + {WM9705_ID2, 3, WM_READS(750), 750}, | ||
156 | + {WM9712_ID2, 0, WM_READS(94), 94}, | ||
157 | + {WM9712_ID2, 1, WM_READS(188), 188}, | ||
158 | + {WM9712_ID2, 2, WM_READS(375), 375}, | ||
159 | + {WM9712_ID2, 3, WM_READS(750), 750}, | ||
160 | + {WM9713_ID2, 0, WM_READS(94), 94}, | ||
161 | + {WM9713_ID2, 1, WM_READS(120), 120}, | ||
162 | + {WM9713_ID2, 2, WM_READS(154), 154}, | ||
163 | + {WM9713_ID2, 3, WM_READS(188), 188}, | ||
164 | +}; | ||
165 | + | ||
166 | +/* continuous speed index */ | ||
167 | +static int sp_idx = 0; | ||
168 | +static u16 last = 0, tries = 0; | ||
169 | + | ||
170 | +/* | ||
171 | + * Pen sampling frequency (Hz) in continuous mode. | ||
172 | + */ | ||
173 | +static int cont_rate = 200; | ||
174 | +module_param(cont_rate, int, 0); | ||
175 | +MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)"); | ||
176 | + | ||
177 | +/* | ||
178 | + * Pen down detection. | ||
179 | + * | ||
180 | + * This driver can either poll or use an interrupt to indicate a pen down | ||
181 | + * event. If the irq request fails then it will fall back to polling mode. | ||
182 | + */ | ||
183 | +static int pen_int = 1; | ||
184 | +module_param(pen_int, int, 0); | ||
185 | +MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)"); | ||
186 | + | ||
187 | +/* | ||
188 | + * Pressure readback. | ||
189 | + * | ||
190 | + * Set to 1 to read back pen down pressure | ||
191 | + */ | ||
192 | +static int pressure = 0; | ||
193 | +module_param(pressure, int, 0); | ||
194 | +MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)"); | ||
195 | + | ||
196 | +/* | ||
197 | + * AC97 touch data slot. | ||
198 | + * | ||
199 | + * Touch screen readback data ac97 slot | ||
200 | + */ | ||
201 | +static int ac97_touch_slot = 5; | ||
202 | +module_param(ac97_touch_slot, int, 0); | ||
203 | +MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number"); | ||
204 | + | ||
205 | + | ||
206 | +/* flush AC97 slot 5 FIFO on pxa machines */ | ||
207 | +#ifdef CONFIG_PXA27x | ||
208 | +void wm97xx_acc_pen_up (struct wm97xx* wm) | ||
209 | +{ | ||
210 | + set_current_state(TASK_INTERRUPTIBLE); | ||
211 | + schedule_timeout(1); | ||
212 | + | ||
213 | + while (MISR & (1 << 2)) | ||
214 | + MODR; | ||
215 | +} | ||
216 | +#else | ||
217 | +void wm97xx_acc_pen_up (struct wm97xx* wm) | ||
218 | +{ | ||
219 | + int count = 16; | ||
220 | + set_current_state(TASK_INTERRUPTIBLE); | ||
221 | + schedule_timeout(1); | ||
222 | + | ||
223 | + while (count < 16) { | ||
224 | + MODR; | ||
225 | + count--; | ||
226 | + } | ||
227 | +} | ||
228 | +#endif | ||
229 | + | ||
230 | +int wm97xx_acc_pen_down (struct wm97xx* wm) | ||
231 | +{ | ||
232 | + u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES; | ||
233 | + int reads = 0; | ||
234 | + | ||
235 | + /* data is never immediately available after pen down irq */ | ||
236 | + set_current_state(TASK_INTERRUPTIBLE); | ||
237 | + schedule_timeout(1); | ||
238 | + | ||
239 | + if (tries > 5){ | ||
240 | + tries = 0; | ||
241 | + return RC_PENUP; | ||
242 | + } | ||
243 | + | ||
244 | + x = MODR; | ||
245 | + if (x == last) { | ||
246 | + tries++; | ||
247 | + return RC_AGAIN; | ||
248 | + } | ||
249 | + last = x; | ||
250 | + do { | ||
251 | + if (reads) | ||
252 | + x= MODR; | ||
253 | + y= MODR; | ||
254 | + if (pressure) | ||
255 | + p = MODR; | ||
256 | + | ||
257 | + /* are samples valid */ | ||
258 | + if ((x & 0x7000) != WM97XX_ADCSEL_X || | ||
259 | + (y & 0x7000) != WM97XX_ADCSEL_Y || | ||
260 | + (p & 0x7000) != WM97XX_ADCSEL_PRES) | ||
261 | + goto up; | ||
262 | + | ||
263 | + /* coordinate is good */ | ||
264 | + tries = 0; | ||
265 | + //printk("x %x y %x p %x\n", x,y,p); | ||
266 | + input_report_abs (wm->input_dev, ABS_X, x & 0xfff); | ||
267 | + input_report_abs (wm->input_dev, ABS_Y, y & 0xfff); | ||
268 | + input_report_abs (wm->input_dev, ABS_PRESSURE, p & 0xfff); | ||
269 | + input_sync (wm->input_dev); | ||
270 | + reads++; | ||
271 | + } while (reads < cinfo[sp_idx].reads); | ||
272 | +up: | ||
273 | + return RC_PENDOWN | RC_AGAIN; | ||
274 | +} | ||
275 | + | ||
276 | +int wm97xx_acc_startup(struct wm97xx* wm) | ||
277 | +{ | ||
278 | + int idx = 0; | ||
279 | + | ||
280 | + /* check we have a codec */ | ||
281 | + if (wm->ac97 == NULL) | ||
282 | + return -ENODEV; | ||
283 | + | ||
284 | + /* Go you big red fire engine */ | ||
285 | + for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) { | ||
286 | + if (wm->id != cinfo[idx].id) | ||
287 | + continue; | ||
288 | + sp_idx = idx; | ||
289 | + if (cont_rate <= cinfo[idx].speed) | ||
290 | + break; | ||
291 | + } | ||
292 | + wm->acc_rate = cinfo[sp_idx].code; | ||
293 | + wm->acc_slot = ac97_touch_slot; | ||
294 | + printk(KERN_INFO "pxa2xx accelerated touchscreen driver, %d samples (sec)\n", | ||
295 | + cinfo[sp_idx].speed); | ||
296 | + | ||
297 | + /* codec specific irq config */ | ||
298 | + if (pen_int) { | ||
299 | + switch (wm->id) { | ||
300 | + case WM9705_ID2: | ||
301 | + wm->pen_irq = IRQ_GPIO(4); | ||
302 | + set_irq_type(IRQ_GPIO(4), IRQT_BOTHEDGE); | ||
303 | + break; | ||
304 | + case WM9712_ID2: | ||
305 | + case WM9713_ID2: | ||
306 | + /* enable pen down interrupt */ | ||
307 | + /* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */ | ||
308 | + wm->pen_irq = MAINSTONE_AC97_IRQ; | ||
309 | + wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN, | ||
310 | + WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_STICKY, WM97XX_GPIO_WAKE); | ||
311 | + wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT, | ||
312 | + WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_NOTSTICKY, WM97XX_GPIO_NOWAKE); | ||
313 | + break; | ||
314 | + default: | ||
315 | + printk(KERN_WARNING "pen down irq not supported on this device\n"); | ||
316 | + pen_int = 0; | ||
317 | + break; | ||
318 | + } | ||
319 | + } | ||
320 | + | ||
321 | + return 0; | ||
322 | +} | ||
323 | + | ||
324 | +void wm97xx_acc_shutdown(struct wm97xx* wm) | ||
325 | +{ | ||
326 | + /* codec specific deconfig */ | ||
327 | + if (pen_int) { | ||
328 | + switch (wm->id & 0xffff) { | ||
329 | + case WM9705_ID2: | ||
330 | + wm->pen_irq = 0; | ||
331 | + break; | ||
332 | + case WM9712_ID2: | ||
333 | + case WM9713_ID2: | ||
334 | + /* disable interrupt */ | ||
335 | + wm->pen_irq = 0; | ||
336 | + break; | ||
337 | + } | ||
338 | + } | ||
339 | +} | ||
340 | + | ||
341 | +static struct wm97xx_mach_ops pxa_mach_ops = { | ||
342 | + .acc_enabled = 1, | ||
343 | + .acc_pen_up = wm97xx_acc_pen_up, | ||
344 | + .acc_pen_down = wm97xx_acc_pen_down, | ||
345 | + .acc_startup = wm97xx_acc_startup, | ||
346 | + .acc_shutdown = wm97xx_acc_shutdown, | ||
347 | +}; | ||
348 | + | ||
349 | +int pxa_wm97xx_probe(struct device *dev) | ||
350 | +{ | ||
351 | + struct wm97xx *wm = dev->driver_data; | ||
352 | + return wm97xx_register_mach_ops (wm, &pxa_mach_ops); | ||
353 | +} | ||
354 | + | ||
355 | +int pxa_wm97xx_remove(struct device *dev) | ||
356 | +{ | ||
357 | + struct wm97xx *wm = dev->driver_data; | ||
358 | + wm97xx_unregister_mach_ops (wm); | ||
359 | + return 0; | ||
360 | +} | ||
361 | + | ||
362 | +static struct device_driver pxa_wm97xx_driver = { | ||
363 | + .name = "wm97xx-touchscreen", | ||
364 | + .bus = &wm97xx_bus_type, | ||
365 | + .owner = THIS_MODULE, | ||
366 | + .probe = pxa_wm97xx_probe, | ||
367 | + .remove = pxa_wm97xx_remove | ||
368 | +}; | ||
369 | + | ||
370 | +static int __init pxa_wm97xx_init(void) | ||
371 | +{ | ||
372 | + return driver_register(&pxa_wm97xx_driver); | ||
373 | +} | ||
374 | + | ||
375 | +static void __exit pxa_wm97xx_exit(void) | ||
376 | +{ | ||
377 | + driver_unregister(&pxa_wm97xx_driver); | ||
378 | +} | ||
379 | + | ||
380 | +module_init(pxa_wm97xx_init); | ||
381 | +module_exit(pxa_wm97xx_exit); | ||
382 | + | ||
383 | +/* Module information */ | ||
384 | +MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>"); | ||
385 | +MODULE_DESCRIPTION("wm97xx continuous touch driver for pxa2xx"); | ||
386 | +MODULE_LICENSE("GPL"); | ||
387 | Index: linux-2.6.17/drivers/input/touchscreen/wm9705.c | ||
388 | =================================================================== | ||
389 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
390 | +++ linux-2.6.17/drivers/input/touchscreen/wm9705.c 2006-09-19 20:36:47.969052000 +0200 | ||
391 | @@ -0,0 +1,360 @@ | ||
392 | +/* | ||
393 | + * wm9705.c -- Codec driver for Wolfson WM9705 AC97 Codec. | ||
394 | + * | ||
395 | + * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. | ||
396 | + * Author: Liam Girdwood | ||
397 | + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
398 | + * Parts Copyright : Ian Molton <spyro@f2s.com> | ||
399 | + * Andrew Zabolotny <zap@homelink.ru> | ||
400 | + * Russell King <rmk@arm.linux.org.uk> | ||
401 | + * | ||
402 | + * This program is free software; you can redistribute it and/or modify it | ||
403 | + * under the terms of the GNU General Public License as published by the | ||
404 | + * Free Software Foundation; either version 2 of the License, or (at your | ||
405 | + * option) any later version. | ||
406 | + * | ||
407 | + * Revision history | ||
408 | + * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> | ||
409 | + * Added pre and post sample calls. | ||
410 | + * | ||
411 | + */ | ||
412 | + | ||
413 | +#include <linux/module.h> | ||
414 | +#include <linux/moduleparam.h> | ||
415 | +#include <linux/version.h> | ||
416 | +#include <linux/kernel.h> | ||
417 | +#include <linux/input.h> | ||
418 | +#include <linux/delay.h> | ||
419 | +#include <linux/bitops.h> | ||
420 | +#include <linux/wm97xx.h> | ||
421 | + | ||
422 | +#define TS_NAME "wm97xx" | ||
423 | +#define WM9705_VERSION "0.62" | ||
424 | +#define DEFAULT_PRESSURE 0xb0c0 | ||
425 | + | ||
426 | +/* | ||
427 | + * Debug | ||
428 | + */ | ||
429 | +#if 0 | ||
430 | +#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) | ||
431 | +#else | ||
432 | +#define dbg(format, arg...) | ||
433 | +#endif | ||
434 | +#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) | ||
435 | +#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) | ||
436 | +#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) | ||
437 | + | ||
438 | +/* | ||
439 | + * Module parameters | ||
440 | + */ | ||
441 | + | ||
442 | +/* | ||
443 | + * Set current used for pressure measurement. | ||
444 | + * | ||
445 | + * Set pil = 2 to use 400uA | ||
446 | + * pil = 1 to use 200uA and | ||
447 | + * pil = 0 to disable pressure measurement. | ||
448 | + * | ||
449 | + * This is used to increase the range of values returned by the adc | ||
450 | + * when measureing touchpanel pressure. | ||
451 | + */ | ||
452 | +static int pil = 0; | ||
453 | +module_param(pil, int, 0); | ||
454 | +MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); | ||
455 | + | ||
456 | +/* | ||
457 | + * Set threshold for pressure measurement. | ||
458 | + * | ||
459 | + * Pen down pressure below threshold is ignored. | ||
460 | + */ | ||
461 | +static int pressure = DEFAULT_PRESSURE & 0xfff; | ||
462 | +module_param(pressure, int, 0); | ||
463 | +MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); | ||
464 | + | ||
465 | +/* | ||
466 | + * Set adc sample delay. | ||
467 | + * | ||
468 | + * For accurate touchpanel measurements, some settling time may be | ||
469 | + * required between the switch matrix applying a voltage across the | ||
470 | + * touchpanel plate and the ADC sampling the signal. | ||
471 | + * | ||
472 | + * This delay can be set by setting delay = n, where n is the array | ||
473 | + * position of the delay in the array delay_table below. | ||
474 | + * Long delays > 1ms are supported for completeness, but are not | ||
475 | + * recommended. | ||
476 | + */ | ||
477 | +static int delay = 4; | ||
478 | +module_param(delay, int, 0); | ||
479 | +MODULE_PARM_DESC(delay, "Set adc sample delay."); | ||
480 | + | ||
481 | +/* | ||
482 | + * Pen detect comparator threshold. | ||
483 | + * | ||
484 | + * 0 to Vmid in 15 steps, 0 = use zero power comparator with Vmid threshold | ||
485 | + * i.e. 1 = Vmid/15 threshold | ||
486 | + * 15 = Vmid/1 threshold | ||
487 | + * | ||
488 | + * Adjust this value if you are having problems with pen detect not | ||
489 | + * detecting any down events. | ||
490 | + */ | ||
491 | +static int pdd = 8; | ||
492 | +module_param(pdd, int, 0); | ||
493 | +MODULE_PARM_DESC(pdd, "Set pen detect comparator threshold"); | ||
494 | + | ||
495 | +/* | ||
496 | + * Set adc mask function. | ||
497 | + * | ||
498 | + * Sources of glitch noise, such as signals driving an LCD display, may feed | ||
499 | + * through to the touch screen plates and affect measurement accuracy. In | ||
500 | + * order to minimise this, a signal may be applied to the MASK pin to delay or | ||
501 | + * synchronise the sampling. | ||
502 | + * | ||
503 | + * 0 = No delay or sync | ||
504 | + * 1 = High on pin stops conversions | ||
505 | + * 2 = Edge triggered, edge on pin delays conversion by delay param (above) | ||
506 | + * 3 = Edge triggered, edge on pin starts conversion after delay param | ||
507 | + */ | ||
508 | +static int mask = 0; | ||
509 | +module_param(mask, int, 0); | ||
510 | +MODULE_PARM_DESC(mask, "Set adc mask function."); | ||
511 | + | ||
512 | +/* | ||
513 | + * ADC sample delay times in uS | ||
514 | + */ | ||
515 | +static const int delay_table[] = { | ||
516 | + 21, // 1 AC97 Link frames | ||
517 | + 42, // 2 | ||
518 | + 84, // 4 | ||
519 | + 167, // 8 | ||
520 | + 333, // 16 | ||
521 | + 667, // 32 | ||
522 | + 1000, // 48 | ||
523 | + 1333, // 64 | ||
524 | + 2000, // 96 | ||
525 | + 2667, // 128 | ||
526 | + 3333, // 160 | ||
527 | + 4000, // 192 | ||
528 | + 4667, // 224 | ||
529 | + 5333, // 256 | ||
530 | + 6000, // 288 | ||
531 | + 0 // No delay, switch matrix always on | ||
532 | +}; | ||
533 | + | ||
534 | +/* | ||
535 | + * Delay after issuing a POLL command. | ||
536 | + * | ||
537 | + * The delay is 3 AC97 link frames + the touchpanel settling delay | ||
538 | + */ | ||
539 | +static inline void poll_delay(int d) | ||
540 | +{ | ||
541 | + udelay (3 * AC97_LINK_FRAME + delay_table [d]); | ||
542 | +} | ||
543 | + | ||
544 | +/* | ||
545 | + * set up the physical settings of the WM9705 | ||
546 | + */ | ||
547 | +static void init_wm9705_phy(struct wm97xx* wm) | ||
548 | +{ | ||
549 | + u16 dig1 = 0, dig2 = WM97XX_RPR; | ||
550 | + | ||
551 | + /* | ||
552 | + * mute VIDEO and AUX as they share X and Y touchscreen | ||
553 | + * inputs on the WM9705 | ||
554 | + */ | ||
555 | + wm97xx_reg_write(wm, AC97_AUX, 0x8000); | ||
556 | + wm97xx_reg_write(wm, AC97_VIDEO, 0x8000); | ||
557 | + | ||
558 | + /* touchpanel pressure current*/ | ||
559 | + if (pil == 2) { | ||
560 | + dig2 |= WM9705_PIL; | ||
561 | + dbg("setting pressure measurement current to 400uA."); | ||
562 | + } else if (pil) | ||
563 | + dbg("setting pressure measurement current to 200uA."); | ||
564 | + if(!pil) | ||
565 | + pressure = 0; | ||
566 | + | ||
567 | + /* polling mode sample settling delay */ | ||
568 | + if (delay!=4) { | ||
569 | + if (delay < 0 || delay > 15) { | ||
570 | + dbg("supplied delay out of range."); | ||
571 | + delay = 4; | ||
572 | + } | ||
573 | + } | ||
574 | + dig1 &= 0xff0f; | ||
575 | + dig1 |= WM97XX_DELAY(delay); | ||
576 | + dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); | ||
577 | + | ||
578 | + /* WM9705 pdd */ | ||
579 | + dig2 |= (pdd & 0x000f); | ||
580 | + dbg("setting pdd to Vmid/%d", 1 - (pdd & 0x000f)); | ||
581 | + | ||
582 | + /* mask */ | ||
583 | + dig2 |= ((mask & 0x3) << 4); | ||
584 | + | ||
585 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); | ||
586 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); | ||
587 | +} | ||
588 | + | ||
589 | +static int wm9705_digitiser_ioctl(struct wm97xx* wm, int cmd) | ||
590 | +{ | ||
591 | + switch(cmd) { | ||
592 | + case WM97XX_DIG_START: | ||
593 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] | WM97XX_PRP_DET_DIG); | ||
594 | + wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ | ||
595 | + break; | ||
596 | + case WM97XX_DIG_STOP: | ||
597 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] & ~WM97XX_PRP_DET_DIG); | ||
598 | + break; | ||
599 | + case WM97XX_AUX_PREPARE: | ||
600 | + memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); | ||
601 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); | ||
602 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); | ||
603 | + break; | ||
604 | + case WM97XX_DIG_RESTORE: | ||
605 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); | ||
606 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); | ||
607 | + break; | ||
608 | + case WM97XX_PHY_INIT: | ||
609 | + init_wm9705_phy(wm); | ||
610 | + break; | ||
611 | + default: | ||
612 | + return -EINVAL; | ||
613 | + } | ||
614 | + return 0; | ||
615 | +} | ||
616 | + | ||
617 | +static inline int is_pden (struct wm97xx* wm) | ||
618 | +{ | ||
619 | + return wm->dig[2] & WM9705_PDEN; | ||
620 | +} | ||
621 | + | ||
622 | +/* | ||
623 | + * Read a sample from the WM9705 adc in polling mode. | ||
624 | + */ | ||
625 | +static int wm9705_poll_sample (struct wm97xx* wm, int adcsel, int *sample) | ||
626 | +{ | ||
627 | + int timeout = 5 * delay; | ||
628 | + | ||
629 | + if (!wm->pen_probably_down) { | ||
630 | + u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
631 | + if (!(data & WM97XX_PEN_DOWN)) | ||
632 | + return RC_PENUP; | ||
633 | + wm->pen_probably_down = 1; | ||
634 | + } | ||
635 | + | ||
636 | + /* set up digitiser */ | ||
637 | + if (adcsel & 0x8000) | ||
638 | + adcsel = ((adcsel & 0x7fff) + 3) << 12; | ||
639 | + | ||
640 | + if (wm->mach_ops && wm->mach_ops->pre_sample) | ||
641 | + wm->mach_ops->pre_sample(adcsel); | ||
642 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); | ||
643 | + | ||
644 | + /* wait 3 AC97 time slots + delay for conversion */ | ||
645 | + poll_delay (delay); | ||
646 | + | ||
647 | + /* wait for POLL to go low */ | ||
648 | + while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { | ||
649 | + udelay(AC97_LINK_FRAME); | ||
650 | + timeout--; | ||
651 | + } | ||
652 | + | ||
653 | + if (timeout <= 0) { | ||
654 | + /* If PDEN is set, we can get a timeout when pen goes up */ | ||
655 | + if (is_pden(wm)) | ||
656 | + wm->pen_probably_down = 0; | ||
657 | + else | ||
658 | + dbg ("adc sample timeout"); | ||
659 | + return RC_PENUP; | ||
660 | + } | ||
661 | + | ||
662 | + *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
663 | + if (wm->mach_ops && wm->mach_ops->post_sample) | ||
664 | + wm->mach_ops->post_sample(adcsel); | ||
665 | + | ||
666 | + /* check we have correct sample */ | ||
667 | + if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { | ||
668 | + dbg ("adc wrong sample, read %x got %x", adcsel, | ||
669 | + *sample & WM97XX_ADCSEL_MASK); | ||
670 | + return RC_PENUP; | ||
671 | + } | ||
672 | + | ||
673 | + if (!(*sample & WM97XX_PEN_DOWN)) { | ||
674 | + wm->pen_probably_down = 0; | ||
675 | + return RC_PENUP; | ||
676 | + } | ||
677 | + | ||
678 | + return RC_VALID; | ||
679 | +} | ||
680 | + | ||
681 | +/* | ||
682 | + * Sample the WM9705 touchscreen in polling mode | ||
683 | + */ | ||
684 | +static int wm9705_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) | ||
685 | +{ | ||
686 | + int rc; | ||
687 | + | ||
688 | + if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) | ||
689 | + return rc; | ||
690 | + if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) | ||
691 | + return rc; | ||
692 | + if (pil) { | ||
693 | + if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) | ||
694 | + return rc; | ||
695 | + } else | ||
696 | + data->p = DEFAULT_PRESSURE; | ||
697 | + | ||
698 | + return RC_VALID; | ||
699 | +} | ||
700 | + | ||
701 | +/* | ||
702 | + * Enable WM9705 continuous mode, i.e. touch data is streamed across an AC97 slot | ||
703 | + */ | ||
704 | +static int wm9705_acc_enable (struct wm97xx* wm, int enable) | ||
705 | +{ | ||
706 | + u16 dig1, dig2; | ||
707 | + int ret = 0; | ||
708 | + | ||
709 | + dig1 = wm->dig[1]; | ||
710 | + dig2 = wm->dig[2]; | ||
711 | + | ||
712 | + if (enable) { | ||
713 | + /* continous mode */ | ||
714 | + if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) | ||
715 | + return ret; | ||
716 | + dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | | ||
717 | + WM97XX_DELAY_MASK | WM97XX_SLT_MASK); | ||
718 | + dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | | ||
719 | + WM97XX_DELAY (delay) | | ||
720 | + WM97XX_SLT (wm->acc_slot) | | ||
721 | + WM97XX_RATE (wm->acc_rate); | ||
722 | + if (pil) | ||
723 | + dig1 |= WM97XX_ADCSEL_PRES; | ||
724 | + dig2 |= WM9705_PDEN; | ||
725 | + } else { | ||
726 | + dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); | ||
727 | + dig2 &= ~WM9705_PDEN; | ||
728 | + if (wm->mach_ops->acc_shutdown) | ||
729 | + wm->mach_ops->acc_shutdown(wm); | ||
730 | + } | ||
731 | + | ||
732 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); | ||
733 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); | ||
734 | + return ret; | ||
735 | +} | ||
736 | + | ||
737 | +struct wm97xx_codec_drv wm97xx_codec = { | ||
738 | + .id = WM9705_ID2, | ||
739 | + .name = "wm9705", | ||
740 | + .poll_sample = wm9705_poll_sample, | ||
741 | + .poll_touch = wm9705_poll_touch, | ||
742 | + .acc_enable = wm9705_acc_enable, | ||
743 | + .digitiser_ioctl = wm9705_digitiser_ioctl, | ||
744 | +}; | ||
745 | + | ||
746 | +EXPORT_SYMBOL_GPL(wm97xx_codec); | ||
747 | + | ||
748 | +/* Module information */ | ||
749 | +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); | ||
750 | +MODULE_DESCRIPTION("WM9705 Touch Screen Driver"); | ||
751 | +MODULE_LICENSE("GPL"); | ||
752 | Index: linux-2.6.17/drivers/input/touchscreen/wm9712.c | ||
753 | =================================================================== | ||
754 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
755 | +++ linux-2.6.17/drivers/input/touchscreen/wm9712.c 2006-09-19 20:36:47.969052000 +0200 | ||
756 | @@ -0,0 +1,464 @@ | ||
757 | +/* | ||
758 | + * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs. | ||
759 | + * | ||
760 | + * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. | ||
761 | + * Author: Liam Girdwood | ||
762 | + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
763 | + * Parts Copyright : Ian Molton <spyro@f2s.com> | ||
764 | + * Andrew Zabolotny <zap@homelink.ru> | ||
765 | + * Russell King <rmk@arm.linux.org.uk> | ||
766 | + * | ||
767 | + * This program is free software; you can redistribute it and/or modify it | ||
768 | + * under the terms of the GNU General Public License as published by the | ||
769 | + * Free Software Foundation; either version 2 of the License, or (at your | ||
770 | + * option) any later version. | ||
771 | + * | ||
772 | + * Revision history | ||
773 | + * 4th Jul 2005 Initial version. | ||
774 | + * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> | ||
775 | + * Added pre and post sample calls. | ||
776 | + * | ||
777 | + */ | ||
778 | + | ||
779 | +#include <linux/module.h> | ||
780 | +#include <linux/moduleparam.h> | ||
781 | +#include <linux/version.h> | ||
782 | +#include <linux/kernel.h> | ||
783 | +#include <linux/input.h> | ||
784 | +#include <linux/delay.h> | ||
785 | +#include <linux/bitops.h> | ||
786 | +#include <linux/wm97xx.h> | ||
787 | + | ||
788 | +#define TS_NAME "wm97xx" | ||
789 | +#define WM9712_VERSION "0.61" | ||
790 | +#define DEFAULT_PRESSURE 0xb0c0 | ||
791 | + | ||
792 | +/* | ||
793 | + * Debug | ||
794 | + */ | ||
795 | +#if 0 | ||
796 | +#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) | ||
797 | +#else | ||
798 | +#define dbg(format, arg...) | ||
799 | +#endif | ||
800 | +#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) | ||
801 | +#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) | ||
802 | +#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) | ||
803 | + | ||
804 | +/* | ||
805 | + * Module parameters | ||
806 | + */ | ||
807 | + | ||
808 | +/* | ||
809 | + * Set internal pull up for pen detect. | ||
810 | + * | ||
811 | + * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) | ||
812 | + * i.e. pull up resistance = 64k Ohms / rpu. | ||
813 | + * | ||
814 | + * Adjust this value if you are having problems with pen detect not | ||
815 | + * detecting any down event. | ||
816 | + */ | ||
817 | +static int rpu = 3; | ||
818 | +module_param(rpu, int, 0); | ||
819 | +MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); | ||
820 | + | ||
821 | +/* | ||
822 | + * Set current used for pressure measurement. | ||
823 | + * | ||
824 | + * Set pil = 2 to use 400uA | ||
825 | + * pil = 1 to use 200uA and | ||
826 | + * pil = 0 to disable pressure measurement. | ||
827 | + * | ||
828 | + * This is used to increase the range of values returned by the adc | ||
829 | + * when measureing touchpanel pressure. | ||
830 | + */ | ||
831 | +static int pil = 0; | ||
832 | +module_param(pil, int, 0); | ||
833 | +MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); | ||
834 | + | ||
835 | +/* | ||
836 | + * Set threshold for pressure measurement. | ||
837 | + * | ||
838 | + * Pen down pressure below threshold is ignored. | ||
839 | + */ | ||
840 | +static int pressure = DEFAULT_PRESSURE & 0xfff; | ||
841 | +module_param(pressure, int, 0); | ||
842 | +MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); | ||
843 | + | ||
844 | +/* | ||
845 | + * Set adc sample delay. | ||
846 | + * | ||
847 | + * For accurate touchpanel measurements, some settling time may be | ||
848 | + * required between the switch matrix applying a voltage across the | ||
849 | + * touchpanel plate and the ADC sampling the signal. | ||
850 | + * | ||
851 | + * This delay can be set by setting delay = n, where n is the array | ||
852 | + * position of the delay in the array delay_table below. | ||
853 | + * Long delays > 1ms are supported for completeness, but are not | ||
854 | + * recommended. | ||
855 | + */ | ||
856 | +static int delay = 3; | ||
857 | +module_param(delay, int, 0); | ||
858 | +MODULE_PARM_DESC(delay, "Set adc sample delay."); | ||
859 | + | ||
860 | +/* | ||
861 | + * Set five_wire = 1 to use a 5 wire touchscreen. | ||
862 | + * | ||
863 | + * NOTE: Five wire mode does not allow for readback of pressure. | ||
864 | + */ | ||
865 | +static int five_wire; | ||
866 | +module_param(five_wire, int, 0); | ||
867 | +MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen."); | ||
868 | + | ||
869 | +/* | ||
870 | + * Set adc mask function. | ||
871 | + * | ||
872 | + * Sources of glitch noise, such as signals driving an LCD display, may feed | ||
873 | + * through to the touch screen plates and affect measurement accuracy. In | ||
874 | + * order to minimise this, a signal may be applied to the MASK pin to delay or | ||
875 | + * synchronise the sampling. | ||
876 | + * | ||
877 | + * 0 = No delay or sync | ||
878 | + * 1 = High on pin stops conversions | ||
879 | + * 2 = Edge triggered, edge on pin delays conversion by delay param (above) | ||
880 | + * 3 = Edge triggered, edge on pin starts conversion after delay param | ||
881 | + */ | ||
882 | +static int mask = 0; | ||
883 | +module_param(mask, int, 0); | ||
884 | +MODULE_PARM_DESC(mask, "Set adc mask function."); | ||
885 | + | ||
886 | +/* | ||
887 | + * Coordinate Polling Enable. | ||
888 | + * | ||
889 | + * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together | ||
890 | + * for every poll. | ||
891 | + */ | ||
892 | +static int coord = 0; | ||
893 | +module_param(coord, int, 0); | ||
894 | +MODULE_PARM_DESC(coord, "Polling coordinate mode"); | ||
895 | + | ||
896 | +/* | ||
897 | + * ADC sample delay times in uS | ||
898 | + */ | ||
899 | +static const int delay_table[] = { | ||
900 | + 21, // 1 AC97 Link frames | ||
901 | + 42, // 2 | ||
902 | + 84, // 4 | ||
903 | + 167, // 8 | ||
904 | + 333, // 16 | ||
905 | + 667, // 32 | ||
906 | + 1000, // 48 | ||
907 | + 1333, // 64 | ||
908 | + 2000, // 96 | ||
909 | + 2667, // 128 | ||
910 | + 3333, // 160 | ||
911 | + 4000, // 192 | ||
912 | + 4667, // 224 | ||
913 | + 5333, // 256 | ||
914 | + 6000, // 288 | ||
915 | + 0 // No delay, switch matrix always on | ||
916 | +}; | ||
917 | + | ||
918 | +/* | ||
919 | + * Delay after issuing a POLL command. | ||
920 | + * | ||
921 | + * The delay is 3 AC97 link frames + the touchpanel settling delay | ||
922 | + */ | ||
923 | +static inline void poll_delay(int d) | ||
924 | +{ | ||
925 | + udelay (3 * AC97_LINK_FRAME + delay_table [d]); | ||
926 | +} | ||
927 | + | ||
928 | +/* | ||
929 | + * set up the physical settings of the WM9712 | ||
930 | + */ | ||
931 | +static void init_wm9712_phy(struct wm97xx* wm) | ||
932 | +{ | ||
933 | + u16 dig1 = 0; | ||
934 | + u16 dig2 = WM97XX_RPR | WM9712_RPU(1); | ||
935 | + | ||
936 | + /* WM9712 rpu */ | ||
937 | + if (rpu) { | ||
938 | + dig2 &= 0xffc0; | ||
939 | + dig2 |= WM9712_RPU(rpu); | ||
940 | + dbg("setting pen detect pull-up to %d Ohms",64000 / rpu); | ||
941 | + } | ||
942 | + | ||
943 | + /* touchpanel pressure current*/ | ||
944 | + if (pil == 2) { | ||
945 | + dig2 |= WM9712_PIL; | ||
946 | + dbg("setting pressure measurement current to 400uA."); | ||
947 | + } else if (pil) | ||
948 | + dbg("setting pressure measurement current to 200uA."); | ||
949 | + if(!pil) | ||
950 | + pressure = 0; | ||
951 | + | ||
952 | + /* WM9712 five wire */ | ||
953 | + if (five_wire) { | ||
954 | + dig2 |= WM9712_45W; | ||
955 | + dbg("setting 5-wire touchscreen mode."); | ||
956 | + } | ||
957 | + | ||
958 | + /* polling mode sample settling delay */ | ||
959 | + if (delay < 0 || delay > 15) { | ||
960 | + dbg("supplied delay out of range."); | ||
961 | + delay = 4; | ||
962 | + } | ||
963 | + dig1 &= 0xff0f; | ||
964 | + dig1 |= WM97XX_DELAY(delay); | ||
965 | + dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); | ||
966 | + | ||
967 | + /* mask */ | ||
968 | + dig2 |= ((mask & 0x3) << 6); | ||
969 | + if (mask) { | ||
970 | + u16 reg; | ||
971 | + /* Set GPIO4 as Mask Pin*/ | ||
972 | + reg = wm97xx_reg_read(wm, AC97_MISC_AFE); | ||
973 | + wm97xx_reg_write(wm, AC97_MISC_AFE, reg | WM97XX_GPIO_4); | ||
974 | + reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); | ||
975 | + wm97xx_reg_write(wm, AC97_GPIO_CFG, reg | WM97XX_GPIO_4); | ||
976 | + } | ||
977 | + | ||
978 | + /* wait - coord mode */ | ||
979 | + if(coord) | ||
980 | + dig2 |= WM9712_WAIT; | ||
981 | + | ||
982 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); | ||
983 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); | ||
984 | +} | ||
985 | + | ||
986 | +static int wm9712_digitiser_ioctl(struct wm97xx* wm, int cmd) | ||
987 | +{ | ||
988 | + u16 dig2 = wm->dig[2]; | ||
989 | + | ||
990 | + switch(cmd) { | ||
991 | + case WM97XX_DIG_START: | ||
992 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 | WM97XX_PRP_DET_DIG); | ||
993 | + wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ | ||
994 | + break; | ||
995 | + case WM97XX_DIG_STOP: | ||
996 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 & ~WM97XX_PRP_DET_DIG); | ||
997 | + break; | ||
998 | + case WM97XX_AUX_PREPARE: | ||
999 | + memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); | ||
1000 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); | ||
1001 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); | ||
1002 | + break; | ||
1003 | + case WM97XX_DIG_RESTORE: | ||
1004 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); | ||
1005 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); | ||
1006 | + break; | ||
1007 | + case WM97XX_PHY_INIT: | ||
1008 | + init_wm9712_phy(wm); | ||
1009 | + break; | ||
1010 | + default: | ||
1011 | + return -EINVAL; | ||
1012 | + } | ||
1013 | + return 0; | ||
1014 | +} | ||
1015 | + | ||
1016 | +static inline int is_pden (struct wm97xx* wm) | ||
1017 | +{ | ||
1018 | + return wm->dig[2] & WM9712_PDEN; | ||
1019 | +} | ||
1020 | + | ||
1021 | +/* | ||
1022 | + * Read a sample from the WM9712 adc in polling mode. | ||
1023 | + */ | ||
1024 | +static int wm9712_poll_sample (struct wm97xx* wm, int adcsel, int *sample) | ||
1025 | +{ | ||
1026 | + int timeout = 5 * delay; | ||
1027 | + | ||
1028 | + if (!wm->pen_probably_down) { | ||
1029 | + u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1030 | + if (!(data & WM97XX_PEN_DOWN)) | ||
1031 | + return RC_PENUP; | ||
1032 | + wm->pen_probably_down = 1; | ||
1033 | + } | ||
1034 | + | ||
1035 | + /* set up digitiser */ | ||
1036 | + if (adcsel & 0x8000) | ||
1037 | + adcsel = ((adcsel & 0x7fff) + 3) << 12; | ||
1038 | + | ||
1039 | + if (wm->mach_ops && wm->mach_ops->pre_sample) | ||
1040 | + wm->mach_ops->pre_sample(adcsel); | ||
1041 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); | ||
1042 | + | ||
1043 | + /* wait 3 AC97 time slots + delay for conversion */ | ||
1044 | + poll_delay (delay); | ||
1045 | + | ||
1046 | + /* wait for POLL to go low */ | ||
1047 | + while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { | ||
1048 | + udelay(AC97_LINK_FRAME); | ||
1049 | + timeout--; | ||
1050 | + } | ||
1051 | + | ||
1052 | + if (timeout <= 0) { | ||
1053 | + /* If PDEN is set, we can get a timeout when pen goes up */ | ||
1054 | + if (is_pden(wm)) | ||
1055 | + wm->pen_probably_down = 0; | ||
1056 | + else | ||
1057 | + dbg ("adc sample timeout"); | ||
1058 | + return RC_PENUP; | ||
1059 | + } | ||
1060 | + | ||
1061 | + *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1062 | + if (wm->mach_ops && wm->mach_ops->post_sample) | ||
1063 | + wm->mach_ops->post_sample(adcsel); | ||
1064 | + | ||
1065 | + /* check we have correct sample */ | ||
1066 | + if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { | ||
1067 | + dbg ("adc wrong sample, read %x got %x", adcsel, | ||
1068 | + *sample & WM97XX_ADCSEL_MASK); | ||
1069 | + return RC_PENUP; | ||
1070 | + } | ||
1071 | + | ||
1072 | + if (!(*sample & WM97XX_PEN_DOWN)) { | ||
1073 | + wm->pen_probably_down = 0; | ||
1074 | + return RC_PENUP; | ||
1075 | + } | ||
1076 | + | ||
1077 | + return RC_VALID; | ||
1078 | +} | ||
1079 | + | ||
1080 | +/* | ||
1081 | + * Read a coord from the WM9712 adc in polling mode. | ||
1082 | + */ | ||
1083 | +static int wm9712_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) | ||
1084 | +{ | ||
1085 | + int timeout = 5 * delay; | ||
1086 | + | ||
1087 | + if (!wm->pen_probably_down) { | ||
1088 | + u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1089 | + if (!(data & WM97XX_PEN_DOWN)) | ||
1090 | + return RC_PENUP; | ||
1091 | + wm->pen_probably_down = 1; | ||
1092 | + } | ||
1093 | + | ||
1094 | + /* set up digitiser */ | ||
1095 | + if (wm->mach_ops && wm->mach_ops->pre_sample) | ||
1096 | + wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); | ||
1097 | + | ||
1098 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, | ||
1099 | + WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay)); | ||
1100 | + | ||
1101 | + /* wait 3 AC97 time slots + delay for conversion and read x */ | ||
1102 | + poll_delay(delay); | ||
1103 | + data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1104 | + /* wait for POLL to go low */ | ||
1105 | + while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { | ||
1106 | + udelay(AC97_LINK_FRAME); | ||
1107 | + timeout--; | ||
1108 | + } | ||
1109 | + | ||
1110 | + if (timeout <= 0) { | ||
1111 | + /* If PDEN is set, we can get a timeout when pen goes up */ | ||
1112 | + if (is_pden(wm)) | ||
1113 | + wm->pen_probably_down = 0; | ||
1114 | + else | ||
1115 | + dbg ("adc sample timeout"); | ||
1116 | + return RC_PENUP; | ||
1117 | + } | ||
1118 | + | ||
1119 | + /* read back y data */ | ||
1120 | + data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1121 | + if (pil) | ||
1122 | + data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1123 | + else | ||
1124 | + data->p = DEFAULT_PRESSURE; | ||
1125 | + | ||
1126 | + if (wm->mach_ops && wm->mach_ops->post_sample) | ||
1127 | + wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); | ||
1128 | + | ||
1129 | + /* check we have correct sample */ | ||
1130 | + if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) | ||
1131 | + goto err; | ||
1132 | + if(pil && !(data->p & WM97XX_ADCSEL_PRES)) | ||
1133 | + goto err; | ||
1134 | + | ||
1135 | + if (!(data->x & WM97XX_PEN_DOWN)) { | ||
1136 | + wm->pen_probably_down = 0; | ||
1137 | + return RC_PENUP; | ||
1138 | + } | ||
1139 | + return RC_VALID; | ||
1140 | +err: | ||
1141 | + return RC_PENUP; | ||
1142 | +} | ||
1143 | + | ||
1144 | +/* | ||
1145 | + * Sample the WM9712 touchscreen in polling mode | ||
1146 | + */ | ||
1147 | +static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) | ||
1148 | +{ | ||
1149 | + int rc; | ||
1150 | + | ||
1151 | + if(coord) { | ||
1152 | + if((rc = wm9712_poll_coord(wm, data)) != RC_VALID) | ||
1153 | + return rc; | ||
1154 | + } else { | ||
1155 | + if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) | ||
1156 | + return rc; | ||
1157 | + | ||
1158 | + if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) | ||
1159 | + return rc; | ||
1160 | + | ||
1161 | + if (pil && !five_wire) { | ||
1162 | + if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) | ||
1163 | + return rc; | ||
1164 | + } else | ||
1165 | + data->p = DEFAULT_PRESSURE; | ||
1166 | + } | ||
1167 | + return RC_VALID; | ||
1168 | +} | ||
1169 | + | ||
1170 | +/* | ||
1171 | + * Enable WM9712 continuous mode, i.e. touch data is streamed across an AC97 slot | ||
1172 | + */ | ||
1173 | +static int wm9712_acc_enable (struct wm97xx* wm, int enable) | ||
1174 | +{ | ||
1175 | + u16 dig1, dig2; | ||
1176 | + int ret = 0; | ||
1177 | + | ||
1178 | + dig1 = wm->dig[1]; | ||
1179 | + dig2 = wm->dig[2]; | ||
1180 | + | ||
1181 | + if (enable) { | ||
1182 | + /* continous mode */ | ||
1183 | + if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) | ||
1184 | + return ret; | ||
1185 | + dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | | ||
1186 | + WM97XX_DELAY_MASK | WM97XX_SLT_MASK); | ||
1187 | + dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | | ||
1188 | + WM97XX_DELAY (delay) | | ||
1189 | + WM97XX_SLT (wm->acc_slot) | | ||
1190 | + WM97XX_RATE (wm->acc_rate); | ||
1191 | + if (pil) | ||
1192 | + dig1 |= WM97XX_ADCSEL_PRES; | ||
1193 | + dig2 |= WM9712_PDEN; | ||
1194 | + } else { | ||
1195 | + dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); | ||
1196 | + dig2 &= ~WM9712_PDEN; | ||
1197 | + if (wm->mach_ops->acc_shutdown) | ||
1198 | + wm->mach_ops->acc_shutdown(wm); | ||
1199 | + } | ||
1200 | + | ||
1201 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); | ||
1202 | + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); | ||
1203 | + return 0; | ||
1204 | +} | ||
1205 | + | ||
1206 | +struct wm97xx_codec_drv wm97xx_codec = { | ||
1207 | + .id = WM9712_ID2, | ||
1208 | + .name = "wm9712", | ||
1209 | + .poll_sample = wm9712_poll_sample, | ||
1210 | + .poll_touch = wm9712_poll_touch, | ||
1211 | + .acc_enable = wm9712_acc_enable, | ||
1212 | + .digitiser_ioctl = wm9712_digitiser_ioctl, | ||
1213 | +}; | ||
1214 | + | ||
1215 | +EXPORT_SYMBOL_GPL(wm97xx_codec); | ||
1216 | + | ||
1217 | +/* Module information */ | ||
1218 | +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); | ||
1219 | +MODULE_DESCRIPTION("WM9712 Touch Screen Driver"); | ||
1220 | +MODULE_LICENSE("GPL"); | ||
1221 | Index: linux-2.6.17/drivers/input/touchscreen/wm9713.c | ||
1222 | =================================================================== | ||
1223 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
1224 | +++ linux-2.6.17/drivers/input/touchscreen/wm9713.c 2006-09-19 20:36:47.969052000 +0200 | ||
1225 | @@ -0,0 +1,461 @@ | ||
1226 | +/* | ||
1227 | + * wm9713.c -- Codec touch driver for Wolfson WM9713 AC97 Codec. | ||
1228 | + * | ||
1229 | + * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. | ||
1230 | + * Author: Liam Girdwood | ||
1231 | + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
1232 | + * Parts Copyright : Ian Molton <spyro@f2s.com> | ||
1233 | + * Andrew Zabolotny <zap@homelink.ru> | ||
1234 | + * Russell King <rmk@arm.linux.org.uk> | ||
1235 | + * | ||
1236 | + * This program is free software; you can redistribute it and/or modify it | ||
1237 | + * under the terms of the GNU General Public License as published by the | ||
1238 | + * Free Software Foundation; either version 2 of the License, or (at your | ||
1239 | + * option) any later version. | ||
1240 | + * | ||
1241 | + * Revision history | ||
1242 | + * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> | ||
1243 | + * Added pre and post sample calls. | ||
1244 | + * | ||
1245 | + */ | ||
1246 | + | ||
1247 | +#include <linux/module.h> | ||
1248 | +#include <linux/moduleparam.h> | ||
1249 | +#include <linux/version.h> | ||
1250 | +#include <linux/kernel.h> | ||
1251 | +#include <linux/input.h> | ||
1252 | +#include <linux/delay.h> | ||
1253 | +#include <linux/bitops.h> | ||
1254 | +#include <linux/wm97xx.h> | ||
1255 | + | ||
1256 | +#define TS_NAME "wm97xx" | ||
1257 | +#define WM9713_VERSION "0.53" | ||
1258 | +#define DEFAULT_PRESSURE 0xb0c0 | ||
1259 | + | ||
1260 | +/* | ||
1261 | + * Debug | ||
1262 | + */ | ||
1263 | +#if 0 | ||
1264 | +#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) | ||
1265 | +#else | ||
1266 | +#define dbg(format, arg...) | ||
1267 | +#endif | ||
1268 | +#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) | ||
1269 | +#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) | ||
1270 | +#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) | ||
1271 | + | ||
1272 | +/* | ||
1273 | + * Module parameters | ||
1274 | + */ | ||
1275 | + | ||
1276 | +/* | ||
1277 | + * Set internal pull up for pen detect. | ||
1278 | + * | ||
1279 | + * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) | ||
1280 | + * i.e. pull up resistance = 64k Ohms / rpu. | ||
1281 | + * | ||
1282 | + * Adjust this value if you are having problems with pen detect not | ||
1283 | + * detecting any down event. | ||
1284 | + */ | ||
1285 | +static int rpu = 1; | ||
1286 | +module_param(rpu, int, 0); | ||
1287 | +MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); | ||
1288 | + | ||
1289 | +/* | ||
1290 | + * Set current used for pressure measurement. | ||
1291 | + * | ||
1292 | + * Set pil = 2 to use 400uA | ||
1293 | + * pil = 1 to use 200uA and | ||
1294 | + * pil = 0 to disable pressure measurement. | ||
1295 | + * | ||
1296 | + * This is used to increase the range of values returned by the adc | ||
1297 | + * when measureing touchpanel pressure. | ||
1298 | + */ | ||
1299 | +static int pil = 0; | ||
1300 | +module_param(pil, int, 0); | ||
1301 | +MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); | ||
1302 | + | ||
1303 | +/* | ||
1304 | + * Set threshold for pressure measurement. | ||
1305 | + * | ||
1306 | + * Pen down pressure below threshold is ignored. | ||
1307 | + */ | ||
1308 | +static int pressure = DEFAULT_PRESSURE & 0xfff; | ||
1309 | +module_param(pressure, int, 0); | ||
1310 | +MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); | ||
1311 | + | ||
1312 | +/* | ||
1313 | + * Set adc sample delay. | ||
1314 | + * | ||
1315 | + * For accurate touchpanel measurements, some settling time may be | ||
1316 | + * required between the switch matrix applying a voltage across the | ||
1317 | + * touchpanel plate and the ADC sampling the signal. | ||
1318 | + * | ||
1319 | + * This delay can be set by setting delay = n, where n is the array | ||
1320 | + * position of the delay in the array delay_table below. | ||
1321 | + * Long delays > 1ms are supported for completeness, but are not | ||
1322 | + * recommended. | ||
1323 | + */ | ||
1324 | +static int delay = 4; | ||
1325 | +module_param(delay, int, 0); | ||
1326 | +MODULE_PARM_DESC(delay, "Set adc sample delay."); | ||
1327 | + | ||
1328 | +/* | ||
1329 | + * Set adc mask function. | ||
1330 | + * | ||
1331 | + * Sources of glitch noise, such as signals driving an LCD display, may feed | ||
1332 | + * through to the touch screen plates and affect measurement accuracy. In | ||
1333 | + * order to minimise this, a signal may be applied to the MASK pin to delay or | ||
1334 | + * synchronise the sampling. | ||
1335 | + * | ||
1336 | + * 0 = No delay or sync | ||
1337 | + * 1 = High on pin stops conversions | ||
1338 | + * 2 = Edge triggered, edge on pin delays conversion by delay param (above) | ||
1339 | + * 3 = Edge triggered, edge on pin starts conversion after delay param | ||
1340 | + */ | ||
1341 | +static int mask = 0; | ||
1342 | +module_param(mask, int, 0); | ||
1343 | +MODULE_PARM_DESC(mask, "Set adc mask function."); | ||
1344 | + | ||
1345 | +/* | ||
1346 | + * Coordinate Polling Enable. | ||
1347 | + * | ||
1348 | + * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together | ||
1349 | + * for every poll. | ||
1350 | + */ | ||
1351 | +static int coord = 1; | ||
1352 | +module_param(coord, int, 0); | ||
1353 | +MODULE_PARM_DESC(coord, "Polling coordinate mode"); | ||
1354 | + | ||
1355 | +/* | ||
1356 | + * ADC sample delay times in uS | ||
1357 | + */ | ||
1358 | +static const int delay_table[] = { | ||
1359 | + 21, // 1 AC97 Link frames | ||
1360 | + 42, // 2 | ||
1361 | + 84, // 4 | ||
1362 | + 167, // 8 | ||
1363 | + 333, // 16 | ||
1364 | + 667, // 32 | ||
1365 | + 1000, // 48 | ||
1366 | + 1333, // 64 | ||
1367 | + 2000, // 96 | ||
1368 | + 2667, // 128 | ||
1369 | + 3333, // 160 | ||
1370 | + 4000, // 192 | ||
1371 | + 4667, // 224 | ||
1372 | + 5333, // 256 | ||
1373 | + 6000, // 288 | ||
1374 | + 0 // No delay, switch matrix always on | ||
1375 | +}; | ||
1376 | + | ||
1377 | +/* | ||
1378 | + * Delay after issuing a POLL command. | ||
1379 | + * | ||
1380 | + * The delay is 3 AC97 link frames + the touchpanel settling delay | ||
1381 | + */ | ||
1382 | +static inline void poll_delay(int d) | ||
1383 | +{ | ||
1384 | + udelay (3 * AC97_LINK_FRAME + delay_table [d]); | ||
1385 | +} | ||
1386 | + | ||
1387 | +/* | ||
1388 | + * set up the physical settings of the WM9713 | ||
1389 | + */ | ||
1390 | +static void init_wm9713_phy(struct wm97xx* wm) | ||
1391 | +{ | ||
1392 | + u16 dig1 = 0, dig2, dig3; | ||
1393 | + | ||
1394 | + /* default values */ | ||
1395 | + dig2 = WM97XX_DELAY(4) | WM97XX_SLT(5); | ||
1396 | + dig3= WM9712_RPU(1); | ||
1397 | + | ||
1398 | + /* rpu */ | ||
1399 | + if (rpu) { | ||
1400 | + dig3 &= 0xffc0; | ||
1401 | + dig3 |= WM9712_RPU(rpu); | ||
1402 | + info("setting pen detect pull-up to %d Ohms",64000 / rpu); | ||
1403 | + } | ||
1404 | + | ||
1405 | + /* touchpanel pressure */ | ||
1406 | + if (pil == 2) { | ||
1407 | + dig3 |= WM9712_PIL; | ||
1408 | + info("setting pressure measurement current to 400uA."); | ||
1409 | + } else if (pil) | ||
1410 | + info ("setting pressure measurement current to 200uA."); | ||
1411 | + if(!pil) | ||
1412 | + pressure = 0; | ||
1413 | + | ||
1414 | + /* sample settling delay */ | ||
1415 | + if (delay < 0 || delay > 15) { | ||
1416 | + info ("supplied delay out of range."); | ||
1417 | + delay = 4; | ||
1418 | + info("setting adc sample delay to %d u Secs.", delay_table[delay]); | ||
1419 | + } | ||
1420 | + dig2 &= 0xff0f; | ||
1421 | + dig2 |= WM97XX_DELAY(delay); | ||
1422 | + | ||
1423 | + /* mask */ | ||
1424 | + dig3 |= ((mask & 0x3) << 4); | ||
1425 | + if(coord) | ||
1426 | + dig3 |= WM9713_WAIT; | ||
1427 | + | ||
1428 | + wm->misc = wm97xx_reg_read(wm, 0x5a); | ||
1429 | + | ||
1430 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); | ||
1431 | + wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); | ||
1432 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); | ||
1433 | + wm97xx_reg_write(wm, AC97_GPIO_STICKY, 0x0); | ||
1434 | +} | ||
1435 | + | ||
1436 | +static int wm9713_digitiser_ioctl(struct wm97xx* wm, int cmd) | ||
1437 | +{ | ||
1438 | + u16 val = 0; | ||
1439 | + | ||
1440 | + switch(cmd){ | ||
1441 | + case WM97XX_DIG_START: | ||
1442 | + val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); | ||
1443 | + wm97xx_reg_write(wm, AC97_EXTENDED_MID, val & 0x7fff); | ||
1444 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] | WM97XX_PRP_DET_DIG); | ||
1445 | + wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ | ||
1446 | + break; | ||
1447 | + case WM97XX_DIG_STOP: | ||
1448 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] & ~WM97XX_PRP_DET_DIG); | ||
1449 | + val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); | ||
1450 | + wm97xx_reg_write(wm, AC97_EXTENDED_MID, val | 0x8000); | ||
1451 | + break; | ||
1452 | + case WM97XX_AUX_PREPARE: | ||
1453 | + memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); | ||
1454 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, 0); | ||
1455 | + wm97xx_reg_write(wm, AC97_WM9713_DIG2, 0); | ||
1456 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, WM97XX_PRP_DET_DIG); | ||
1457 | + break; | ||
1458 | + case WM97XX_DIG_RESTORE: | ||
1459 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig_save[0]); | ||
1460 | + wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig_save[1]); | ||
1461 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig_save[2]); | ||
1462 | + break; | ||
1463 | + case WM97XX_PHY_INIT: | ||
1464 | + init_wm9713_phy(wm); | ||
1465 | + break; | ||
1466 | + default: | ||
1467 | + return -EINVAL; | ||
1468 | + } | ||
1469 | + return 0; | ||
1470 | +} | ||
1471 | + | ||
1472 | +static inline int is_pden (struct wm97xx* wm) | ||
1473 | +{ | ||
1474 | + return wm->dig[2] & WM9713_PDEN; | ||
1475 | +} | ||
1476 | + | ||
1477 | +/* | ||
1478 | + * Read a sample from the WM9713 adc in polling mode. | ||
1479 | + */ | ||
1480 | +static int wm9713_poll_sample (struct wm97xx* wm, int adcsel, int *sample) | ||
1481 | +{ | ||
1482 | + u16 dig1; | ||
1483 | + int timeout = 5 * delay; | ||
1484 | + | ||
1485 | + if (!wm->pen_probably_down) { | ||
1486 | + u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1487 | + if (!(data & WM97XX_PEN_DOWN)) | ||
1488 | + return RC_PENUP; | ||
1489 | + wm->pen_probably_down = 1; | ||
1490 | + } | ||
1491 | + | ||
1492 | + /* set up digitiser */ | ||
1493 | + if (adcsel & 0x8000) | ||
1494 | + adcsel = 1 << ((adcsel & 0x7fff) + 3); | ||
1495 | + | ||
1496 | + dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); | ||
1497 | + dig1 &= ~WM9713_ADCSEL_MASK; | ||
1498 | + | ||
1499 | + if (wm->mach_ops && wm->mach_ops->pre_sample) | ||
1500 | + wm->mach_ops->pre_sample(adcsel); | ||
1501 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | adcsel |WM9713_POLL); | ||
1502 | + | ||
1503 | + /* wait 3 AC97 time slots + delay for conversion */ | ||
1504 | + poll_delay(delay); | ||
1505 | + | ||
1506 | + /* wait for POLL to go low */ | ||
1507 | + while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { | ||
1508 | + udelay(AC97_LINK_FRAME); | ||
1509 | + timeout--; | ||
1510 | + } | ||
1511 | + | ||
1512 | + if (timeout <= 0) { | ||
1513 | + /* If PDEN is set, we can get a timeout when pen goes up */ | ||
1514 | + if (is_pden(wm)) | ||
1515 | + wm->pen_probably_down = 0; | ||
1516 | + else | ||
1517 | + dbg ("adc sample timeout"); | ||
1518 | + return RC_PENUP; | ||
1519 | + } | ||
1520 | + | ||
1521 | + *sample =wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1522 | + if (wm->mach_ops && wm->mach_ops->post_sample) | ||
1523 | + wm->mach_ops->post_sample(adcsel); | ||
1524 | + | ||
1525 | + /* check we have correct sample */ | ||
1526 | + if ((*sample & WM97XX_ADCSRC_MASK) != ffs(adcsel >> 1) << 12) { | ||
1527 | + dbg ("adc wrong sample, read %x got %x", adcsel, | ||
1528 | + *sample & WM97XX_ADCSRC_MASK); | ||
1529 | + return RC_PENUP; | ||
1530 | + } | ||
1531 | + | ||
1532 | + if (!(*sample & WM97XX_PEN_DOWN)) { | ||
1533 | + wm->pen_probably_down = 0; | ||
1534 | + return RC_PENUP; | ||
1535 | + } | ||
1536 | + | ||
1537 | + return RC_VALID; | ||
1538 | +} | ||
1539 | + | ||
1540 | +/* | ||
1541 | + * Read a coordinate from the WM9713 adc in polling mode. | ||
1542 | + */ | ||
1543 | +static int wm9713_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) | ||
1544 | +{ | ||
1545 | + u16 dig1; | ||
1546 | + int timeout = 5 * delay; | ||
1547 | + | ||
1548 | + if (!wm->pen_probably_down) { | ||
1549 | + u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1550 | + if (!(data & WM97XX_PEN_DOWN)) | ||
1551 | + return RC_PENUP; | ||
1552 | + wm->pen_probably_down = 1; | ||
1553 | + } | ||
1554 | + | ||
1555 | + /* set up digitiser */ | ||
1556 | + dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); | ||
1557 | + dig1 &= ~WM9713_ADCSEL_MASK; | ||
1558 | + if(pil) | ||
1559 | + dig1 |= WM97XX_ADCSEL_PRES; | ||
1560 | + | ||
1561 | + if (wm->mach_ops && wm->mach_ops->pre_sample) | ||
1562 | + wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); | ||
1563 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | WM9713_POLL | WM9713_COO); | ||
1564 | + | ||
1565 | + /* wait 3 AC97 time slots + delay for conversion */ | ||
1566 | + poll_delay(delay); | ||
1567 | + data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1568 | + /* wait for POLL to go low */ | ||
1569 | + while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { | ||
1570 | + udelay(AC97_LINK_FRAME); | ||
1571 | + timeout--; | ||
1572 | + } | ||
1573 | + | ||
1574 | + if (timeout <= 0) { | ||
1575 | + /* If PDEN is set, we can get a timeout when pen goes up */ | ||
1576 | + if (is_pden(wm)) | ||
1577 | + wm->pen_probably_down = 0; | ||
1578 | + else | ||
1579 | + dbg ("adc sample timeout"); | ||
1580 | + return RC_PENUP; | ||
1581 | + } | ||
1582 | + | ||
1583 | + /* read back data */ | ||
1584 | + data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1585 | + if (pil) | ||
1586 | + data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); | ||
1587 | + else | ||
1588 | + data->p = DEFAULT_PRESSURE; | ||
1589 | + | ||
1590 | + if (wm->mach_ops && wm->mach_ops->post_sample) | ||
1591 | + wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); | ||
1592 | + | ||
1593 | + /* check we have correct sample */ | ||
1594 | + if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) | ||
1595 | + goto err; | ||
1596 | + if(pil && !(data->p & WM97XX_ADCSEL_PRES)) | ||
1597 | + goto err; | ||
1598 | + | ||
1599 | + if (!(data->x & WM97XX_PEN_DOWN)) { | ||
1600 | + wm->pen_probably_down = 0; | ||
1601 | + return RC_PENUP; | ||
1602 | + } | ||
1603 | + return RC_VALID; | ||
1604 | +err: | ||
1605 | + return RC_PENUP; | ||
1606 | +} | ||
1607 | + | ||
1608 | +/* | ||
1609 | + * Sample the WM9713 touchscreen in polling mode | ||
1610 | + */ | ||
1611 | +static int wm9713_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) | ||
1612 | +{ | ||
1613 | + int rc; | ||
1614 | + | ||
1615 | + if(coord) { | ||
1616 | + if((rc = wm9713_poll_coord(wm, data)) != RC_VALID) | ||
1617 | + return rc; | ||
1618 | + } else { | ||
1619 | + if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_X, &data->x)) != RC_VALID) | ||
1620 | + return rc; | ||
1621 | + if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_Y, &data->y)) != RC_VALID) | ||
1622 | + return rc; | ||
1623 | + if (pil) { | ||
1624 | + if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_PRES, &data->p)) != RC_VALID) | ||
1625 | + return rc; | ||
1626 | + } else | ||
1627 | + data->p = DEFAULT_PRESSURE; | ||
1628 | + } | ||
1629 | + return RC_VALID; | ||
1630 | +} | ||
1631 | + | ||
1632 | +/* | ||
1633 | + * Enable WM9713 continuous mode, i.e. touch data is streamed across an AC97 slot | ||
1634 | + */ | ||
1635 | +static int wm9713_acc_enable (struct wm97xx* wm, int enable) | ||
1636 | +{ | ||
1637 | + u16 dig1, dig2, dig3; | ||
1638 | + int ret = 0; | ||
1639 | + | ||
1640 | + dig1 = wm->dig[0]; | ||
1641 | + dig2 = wm->dig[1]; | ||
1642 | + dig3 = wm->dig[2]; | ||
1643 | + | ||
1644 | + if (enable) { | ||
1645 | + /* continous mode */ | ||
1646 | + if (wm->mach_ops->acc_startup && | ||
1647 | + (ret = wm->mach_ops->acc_startup(wm)) < 0) | ||
1648 | + return ret; | ||
1649 | + | ||
1650 | + dig1 &= ~WM9713_ADCSEL_MASK; | ||
1651 | + dig1 |= WM9713_CTC | WM9713_COO | WM9713_ADCSEL_X | WM9713_ADCSEL_Y; | ||
1652 | + if (pil) | ||
1653 | + dig1 |= WM9713_ADCSEL_PRES; | ||
1654 | + dig2 &= ~(WM97XX_DELAY_MASK | WM97XX_SLT_MASK | WM97XX_CM_RATE_MASK); | ||
1655 | + dig2 |= WM97XX_SLEN | WM97XX_DELAY (delay) | | ||
1656 | + WM97XX_SLT (wm->acc_slot) | WM97XX_RATE (wm->acc_rate); | ||
1657 | + dig3 |= WM9713_PDEN; | ||
1658 | + } else { | ||
1659 | + dig1 &= ~(WM9713_CTC | WM9713_COO); | ||
1660 | + dig2 &= ~WM97XX_SLEN; | ||
1661 | + dig3 &= ~WM9713_PDEN; | ||
1662 | + if (wm->mach_ops->acc_shutdown) | ||
1663 | + wm->mach_ops->acc_shutdown(wm); | ||
1664 | + } | ||
1665 | + | ||
1666 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); | ||
1667 | + wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); | ||
1668 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); | ||
1669 | + return ret; | ||
1670 | +} | ||
1671 | + | ||
1672 | +struct wm97xx_codec_drv wm97xx_codec = { | ||
1673 | + .id = WM9713_ID2, | ||
1674 | + .name = "wm9713", | ||
1675 | + .poll_sample = wm9713_poll_sample, | ||
1676 | + .poll_touch = wm9713_poll_touch, | ||
1677 | + .acc_enable = wm9713_acc_enable, | ||
1678 | + .digitiser_ioctl = wm9713_digitiser_ioctl, | ||
1679 | +}; | ||
1680 | + | ||
1681 | +EXPORT_SYMBOL_GPL(wm97xx_codec); | ||
1682 | + | ||
1683 | +/* Module information */ | ||
1684 | +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); | ||
1685 | +MODULE_DESCRIPTION("WM9713 Touch Screen Driver"); | ||
1686 | +MODULE_LICENSE("GPL"); | ||
1687 | Index: linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c | ||
1688 | =================================================================== | ||
1689 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
1690 | +++ linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c 2006-09-19 20:36:47.969052000 +0200 | ||
1691 | @@ -0,0 +1,912 @@ | ||
1692 | +/* | ||
1693 | + * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 | ||
1694 | + * and WM9713 AC97 Codecs. | ||
1695 | + * | ||
1696 | + * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. | ||
1697 | + * Author: Liam Girdwood | ||
1698 | + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
1699 | + * Parts Copyright : Ian Molton <spyro@f2s.com> | ||
1700 | + * Andrew Zabolotny <zap@homelink.ru> | ||
1701 | + * Russell King <rmk@arm.linux.org.uk> | ||
1702 | + * | ||
1703 | + * This program is free software; you can redistribute it and/or modify it | ||
1704 | + * under the terms of the GNU General Public License as published by the | ||
1705 | + * Free Software Foundation; either version 2 of the License, or (at your | ||
1706 | + * option) any later version. | ||
1707 | + * | ||
1708 | + * Notes: | ||
1709 | + * | ||
1710 | + * Features: | ||
1711 | + * - supports WM9705, WM9712, WM9713 | ||
1712 | + * - polling mode | ||
1713 | + * - continuous mode (arch-dependent) | ||
1714 | + * - adjustable rpu/dpp settings | ||
1715 | + * - adjustable pressure current | ||
1716 | + * - adjustable sample settle delay | ||
1717 | + * - 4 and 5 wire touchscreens (5 wire is WM9712 only) | ||
1718 | + * - pen down detection | ||
1719 | + * - battery monitor | ||
1720 | + * - sample AUX adc's | ||
1721 | + * - power management | ||
1722 | + * - codec GPIO | ||
1723 | + * - codec event notification | ||
1724 | + * Todo | ||
1725 | + * - Support for async sampling control for noisy LCD's. | ||
1726 | + * | ||
1727 | + * Revision history | ||
1728 | + * 7th May 2003 Initial version. | ||
1729 | + * 6th June 2003 Added non module support and AC97 registration. | ||
1730 | + * 18th June 2003 Added AUX adc sampling. | ||
1731 | + * 23rd June 2003 Did some minimal reformatting, fixed a couple of | ||
1732 | + * codec_mutexing bugs and noted a race to fix. | ||
1733 | + * 24th June 2003 Added power management and fixed race condition. | ||
1734 | + * 10th July 2003 Changed to a misc device. | ||
1735 | + * 31st July 2003 Moved TS_EVENT and TS_CAL to wm97xx.h | ||
1736 | + * 8th Aug 2003 Added option for read() calling wm97xx_sample_touch() | ||
1737 | + * because some ac97_read/ac_97_write call schedule() | ||
1738 | + * 7th Nov 2003 Added Input touch event interface, stanley.cai@intel.com | ||
1739 | + * 13th Nov 2003 Removed h3600 touch interface, added interrupt based | ||
1740 | + * pen down notification and implemented continous mode | ||
1741 | + * on XScale arch. | ||
1742 | + * 16th Nov 2003 Ian Molton <spyro@f2s.com> | ||
1743 | + * Modified so that it suits the new 2.6 driver model. | ||
1744 | + * 25th Jan 2004 Andrew Zabolotny <zap@homelink.ru> | ||
1745 | + * Implemented IRQ-driven pen down detection, implemented | ||
1746 | + * the private API meant to be exposed to platform-specific | ||
1747 | + * drivers, reorganized the driver so that it supports | ||
1748 | + * an arbitrary number of devices. | ||
1749 | + * 1st Feb 2004 Moved continuous mode handling to a separate | ||
1750 | + * architecture-dependent file. For now only PXA | ||
1751 | + * built-in AC97 controller is supported (pxa-ac97-wm97xx.c). | ||
1752 | + * 11th Feb 2004 Reduced CPU usage by keeping a cached copy of both | ||
1753 | + * digitizer registers instead of reading them every time. | ||
1754 | + * A reorganization of the whole code for better | ||
1755 | + * error handling. | ||
1756 | + * 17th Apr 2004 Added BMON support. | ||
1757 | + * 17th Nov 2004 Added codec GPIO, codec event handling (real and virtual | ||
1758 | + * GPIOs) and 2.6 power management. | ||
1759 | + * 29th Nov 2004 Added WM9713 support. | ||
1760 | + * 4th Jul 2005 Moved codec specific code out to seperate files. | ||
1761 | + * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> | ||
1762 | + * Added bus interface. | ||
1763 | + */ | ||
1764 | + | ||
1765 | +#include <linux/module.h> | ||
1766 | +#include <linux/moduleparam.h> | ||
1767 | +#include <linux/version.h> | ||
1768 | +#include <linux/kernel.h> | ||
1769 | +#include <linux/init.h> | ||
1770 | +#include <linux/delay.h> | ||
1771 | +#include <linux/string.h> | ||
1772 | +#include <linux/proc_fs.h> | ||
1773 | +#include <linux/pm.h> | ||
1774 | +#include <linux/interrupt.h> | ||
1775 | +#include <linux/bitops.h> | ||
1776 | +#include <linux/workqueue.h> | ||
1777 | +#include <linux/device.h> | ||
1778 | +#include <linux/wm97xx.h> | ||
1779 | +#include <asm/uaccess.h> | ||
1780 | +#include <asm/io.h> | ||
1781 | + | ||
1782 | +#define TS_NAME "wm97xx" | ||
1783 | +#define WM_CORE_VERSION "0.63" | ||
1784 | +#define DEFAULT_PRESSURE 0xb0c0 | ||
1785 | + | ||
1786 | +/* | ||
1787 | + * WM97xx - enable/disable AUX ADC sysfs | ||
1788 | + */ | ||
1789 | +static int aux_sys = 1; | ||
1790 | +module_param(aux_sys, int, 0); | ||
1791 | +MODULE_PARM_DESC(aux_sys, "enable AUX ADC sysfs entries"); | ||
1792 | + | ||
1793 | +/* | ||
1794 | + * WM97xx - enable/disable codec status sysfs | ||
1795 | + */ | ||
1796 | +static int status_sys = 1; | ||
1797 | +module_param(status_sys, int, 0); | ||
1798 | +MODULE_PARM_DESC(status_sys, "enable codec status sysfs entries"); | ||
1799 | + | ||
1800 | +/* | ||
1801 | + * Touchscreen absolute values | ||
1802 | + * | ||
1803 | + * These parameters are used to help the input layer discard out of | ||
1804 | + * range readings and reduce jitter etc. | ||
1805 | + * | ||
1806 | + * o min, max:- indicate the min and max values your touch screen returns | ||
1807 | + * o fuzz:- use a higher number to reduce jitter | ||
1808 | + * | ||
1809 | + * The default values correspond to Mainstone II in QVGA mode | ||
1810 | + * | ||
1811 | + * Please read | ||
1812 | + * Documentation/input/input-programming.txt for more details. | ||
1813 | + */ | ||
1814 | + | ||
1815 | +static int abs_x[3] = {350,3900,5}; | ||
1816 | +module_param_array(abs_x, int, NULL, 0); | ||
1817 | +MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz"); | ||
1818 | + | ||
1819 | +static int abs_y[3] = {320,3750,40}; | ||
1820 | +module_param_array(abs_y, int, NULL, 0); | ||
1821 | +MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz"); | ||
1822 | + | ||
1823 | +static int abs_p[3] = {0,150,4}; | ||
1824 | +module_param_array(abs_p, int, NULL, 0); | ||
1825 | +MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz"); | ||
1826 | + | ||
1827 | +/* | ||
1828 | + * Debug | ||
1829 | + */ | ||
1830 | +#if 0 | ||
1831 | +#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) | ||
1832 | +#else | ||
1833 | +#define dbg(format, arg...) | ||
1834 | +#endif | ||
1835 | +#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) | ||
1836 | +#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) | ||
1837 | +#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) | ||
1838 | + | ||
1839 | +/* codec AC97 IO access */ | ||
1840 | +int wm97xx_reg_read(struct wm97xx *wm, u16 reg) | ||
1841 | +{ | ||
1842 | + if (wm->ac97) | ||
1843 | + return wm->ac97->bus->ops->read(wm->ac97, reg); | ||
1844 | + else | ||
1845 | + return -1; | ||
1846 | +} | ||
1847 | + | ||
1848 | +void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val) | ||
1849 | +{ | ||
1850 | + /* cache digitiser registers */ | ||
1851 | + if(reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3) | ||
1852 | + wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val; | ||
1853 | + | ||
1854 | + /* cache gpio regs */ | ||
1855 | + if(reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE) | ||
1856 | + wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val; | ||
1857 | + | ||
1858 | + /* wm9713 irq reg */ | ||
1859 | + if(reg == 0x5a) | ||
1860 | + wm->misc = val; | ||
1861 | + | ||
1862 | + if (wm->ac97) | ||
1863 | + wm->ac97->bus->ops->write(wm->ac97, reg, val); | ||
1864 | +} | ||
1865 | + | ||
1866 | + | ||
1867 | +/** | ||
1868 | + * wm97xx_read_aux_adc - Read the aux adc. | ||
1869 | + * @wm: wm97xx device. | ||
1870 | + * @adcsel: codec ADC to be read | ||
1871 | + * | ||
1872 | + * Reads the selected AUX ADC. | ||
1873 | + */ | ||
1874 | + | ||
1875 | +int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) | ||
1876 | +{ | ||
1877 | + int power_adc = 0, auxval; | ||
1878 | + u16 power = 0; | ||
1879 | + | ||
1880 | + /* get codec */ | ||
1881 | + mutex_lock(&wm->codec_mutex); | ||
1882 | + | ||
1883 | + /* When the touchscreen is not in use, we may have to power up the AUX ADC | ||
1884 | + * before we can use sample the AUX inputs-> | ||
1885 | + */ | ||
1886 | + if (wm->id == WM9713_ID2 && | ||
1887 | + (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) { | ||
1888 | + power_adc = 1; | ||
1889 | + wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff); | ||
1890 | + } | ||
1891 | + | ||
1892 | + /* Prepare the codec for AUX reading */ | ||
1893 | + wm->codec->digitiser_ioctl(wm, WM97XX_AUX_PREPARE); | ||
1894 | + | ||
1895 | + /* Turn polling mode on to read AUX ADC */ | ||
1896 | + wm->pen_probably_down = 1; | ||
1897 | + wm->codec->poll_sample(wm, adcsel, &auxval); | ||
1898 | + | ||
1899 | + if (power_adc) | ||
1900 | + wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); | ||
1901 | + | ||
1902 | + wm->codec->digitiser_ioctl(wm, WM97XX_DIG_RESTORE); | ||
1903 | + | ||
1904 | + wm->pen_probably_down = 0; | ||
1905 | + | ||
1906 | + mutex_unlock(&wm->codec_mutex); | ||
1907 | + return auxval & 0xfff; | ||
1908 | +} | ||
1909 | + | ||
1910 | +#define WM97XX_AUX_ATTR(name,input) \ | ||
1911 | +static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ | ||
1912 | +{ \ | ||
1913 | + struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ | ||
1914 | + return sprintf(buf, "%d\n", wm97xx_read_aux_adc(wm, input)); \ | ||
1915 | +} \ | ||
1916 | +static DEVICE_ATTR(name, 0444, name##_show, NULL) | ||
1917 | + | ||
1918 | +WM97XX_AUX_ATTR(aux1, WM97XX_AUX_ID1); | ||
1919 | +WM97XX_AUX_ATTR(aux2, WM97XX_AUX_ID2); | ||
1920 | +WM97XX_AUX_ATTR(aux3, WM97XX_AUX_ID3); | ||
1921 | +WM97XX_AUX_ATTR(aux4, WM97XX_AUX_ID4); | ||
1922 | + | ||
1923 | +#define WM97XX_STATUS_ATTR(name) \ | ||
1924 | +static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ | ||
1925 | +{ \ | ||
1926 | + struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ | ||
1927 | + return sprintf(buf, "%d\n", wm97xx_reg_read(wm, AC97_GPIO_STATUS)); \ | ||
1928 | +} \ | ||
1929 | +static DEVICE_ATTR(name, 0444, name##_show, NULL) | ||
1930 | + | ||
1931 | +WM97XX_STATUS_ATTR(gpio); | ||
1932 | + | ||
1933 | +static int wm97xx_sys_add(struct device *dev) | ||
1934 | +{ | ||
1935 | + if (aux_sys) { | ||
1936 | + device_create_file(dev, &dev_attr_aux1); | ||
1937 | + device_create_file(dev, &dev_attr_aux2); | ||
1938 | + device_create_file(dev, &dev_attr_aux3); | ||
1939 | + device_create_file(dev, &dev_attr_aux4); | ||
1940 | + } | ||
1941 | + if (status_sys) | ||
1942 | + device_create_file(dev, &dev_attr_gpio); | ||
1943 | + return 0; | ||
1944 | +} | ||
1945 | + | ||
1946 | +static void wm97xx_sys_remove(struct device *dev) | ||
1947 | +{ | ||
1948 | + if (status_sys) | ||
1949 | + device_remove_file(dev, &dev_attr_gpio); | ||
1950 | + if (aux_sys) { | ||
1951 | + device_remove_file(dev, &dev_attr_aux1); | ||
1952 | + device_remove_file(dev, &dev_attr_aux2); | ||
1953 | + device_remove_file(dev, &dev_attr_aux3); | ||
1954 | + device_remove_file(dev, &dev_attr_aux4); | ||
1955 | + } | ||
1956 | +} | ||
1957 | + | ||
1958 | +/** | ||
1959 | + * wm97xx_get_gpio - Get the status of a codec GPIO. | ||
1960 | + * @wm: wm97xx device. | ||
1961 | + * @gpio: gpio | ||
1962 | + * | ||
1963 | + * Get the status of a codec GPIO pin | ||
1964 | + */ | ||
1965 | + | ||
1966 | +wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio) | ||
1967 | +{ | ||
1968 | + u16 status; | ||
1969 | + wm97xx_gpio_status_t ret; | ||
1970 | + | ||
1971 | + mutex_lock(&wm->codec_mutex); | ||
1972 | + status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); | ||
1973 | + | ||
1974 | + if (status & gpio) | ||
1975 | + ret = WM97XX_GPIO_HIGH; | ||
1976 | + else | ||
1977 | + ret = WM97XX_GPIO_LOW; | ||
1978 | + | ||
1979 | + mutex_unlock(&wm->codec_mutex); | ||
1980 | + return ret; | ||
1981 | +} | ||
1982 | + | ||
1983 | +/** | ||
1984 | + * wm97xx_set_gpio - Set the status of a codec GPIO. | ||
1985 | + * @wm: wm97xx device. | ||
1986 | + * @gpio: gpio | ||
1987 | + * | ||
1988 | + * | ||
1989 | + * Set the status of a codec GPIO pin | ||
1990 | + */ | ||
1991 | + | ||
1992 | +void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, | ||
1993 | + wm97xx_gpio_status_t status) | ||
1994 | +{ | ||
1995 | + u16 reg; | ||
1996 | + | ||
1997 | + mutex_lock(&wm->codec_mutex); | ||
1998 | + reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS); | ||
1999 | + | ||
2000 | + if (status & WM97XX_GPIO_HIGH) | ||
2001 | + reg |= gpio; | ||
2002 | + else | ||
2003 | + reg &= ~gpio; | ||
2004 | + | ||
2005 | + if (wm->id == WM9712_ID2) | ||
2006 | + wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1); | ||
2007 | + else | ||
2008 | + wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg); | ||
2009 | + mutex_unlock(&wm->codec_mutex); | ||
2010 | +} | ||
2011 | + | ||
2012 | +/* | ||
2013 | + * Codec GPIO pin configuration, this set's pin direction, polarity, | ||
2014 | + * stickyness and wake up. | ||
2015 | + */ | ||
2016 | +void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, wm97xx_gpio_dir_t dir, | ||
2017 | + wm97xx_gpio_pol_t pol, wm97xx_gpio_sticky_t sticky, | ||
2018 | + wm97xx_gpio_wake_t wake) | ||
2019 | +{ | ||
2020 | + u16 reg; | ||
2021 | + | ||
2022 | + mutex_lock(&wm->codec_mutex); | ||
2023 | + reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); | ||
2024 | + | ||
2025 | + if (pol == WM97XX_GPIO_POL_HIGH) | ||
2026 | + reg |= gpio; | ||
2027 | + else | ||
2028 | + reg &= ~gpio; | ||
2029 | + | ||
2030 | + wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg); | ||
2031 | + reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY); | ||
2032 | + | ||
2033 | + if (sticky == WM97XX_GPIO_STICKY) | ||
2034 | + reg |= gpio; | ||
2035 | + else | ||
2036 | + reg &= ~gpio; | ||
2037 | + | ||
2038 | + wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg); | ||
2039 | + reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); | ||
2040 | + | ||
2041 | + if (wake == WM97XX_GPIO_WAKE) | ||
2042 | + reg |= gpio; | ||
2043 | + else | ||
2044 | + reg &= ~gpio; | ||
2045 | + | ||
2046 | + wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg); | ||
2047 | + reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); | ||
2048 | + | ||
2049 | + if (dir == WM97XX_GPIO_IN) | ||
2050 | + reg |= gpio; | ||
2051 | + else | ||
2052 | + reg &= ~gpio; | ||
2053 | + | ||
2054 | + wm97xx_reg_write(wm, AC97_GPIO_CFG, reg); | ||
2055 | + mutex_unlock(&wm->codec_mutex); | ||
2056 | +} | ||
2057 | + | ||
2058 | +/* | ||
2059 | + * Handle a pen down interrupt. | ||
2060 | + */ | ||
2061 | +static void wm97xx_pen_irq_worker(void *ptr) | ||
2062 | +{ | ||
2063 | + struct wm97xx *wm = (struct wm97xx *) ptr; | ||
2064 | + | ||
2065 | + /* do we need to enable the touch panel reader */ | ||
2066 | + if (wm->id == WM9705_ID2) { | ||
2067 | + if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & WM97XX_PEN_DOWN) | ||
2068 | + wm->pen_is_down = 1; | ||
2069 | + else | ||
2070 | + wm->pen_is_down = 0; | ||
2071 | + wake_up_interruptible(&wm->pen_irq_wait); | ||
2072 | + } else { | ||
2073 | + u16 status, pol; | ||
2074 | + mutex_lock(&wm->codec_mutex); | ||
2075 | + status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); | ||
2076 | + pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); | ||
2077 | + | ||
2078 | + if (WM97XX_GPIO_13 & pol & status) { | ||
2079 | + wm->pen_is_down = 1; | ||
2080 | + wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & ~WM97XX_GPIO_13); | ||
2081 | + } else { | ||
2082 | + wm->pen_is_down = 0; | ||
2083 | + wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | WM97XX_GPIO_13); | ||
2084 | + } | ||
2085 | + | ||
2086 | + if (wm->id == WM9712_ID2) | ||
2087 | + wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & ~WM97XX_GPIO_13) << 1); | ||
2088 | + else | ||
2089 | + wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & ~WM97XX_GPIO_13); | ||
2090 | + mutex_unlock(&wm->codec_mutex); | ||
2091 | + wake_up_interruptible(&wm->pen_irq_wait); | ||
2092 | + } | ||
2093 | + | ||
2094 | + if (!wm->pen_is_down && wm->mach_ops && wm->mach_ops->acc_enabled) | ||
2095 | + wm->mach_ops->acc_pen_up(wm); | ||
2096 | + enable_irq(wm->pen_irq); | ||
2097 | +} | ||
2098 | + | ||
2099 | +/* | ||
2100 | + * Codec PENDOWN irq handler | ||
2101 | + * | ||
2102 | + * We have to disable the codec interrupt in the handler because it can | ||
2103 | + * take upto 1ms to clear the interrupt source. The interrupt is then enabled | ||
2104 | + * again in the slow handler when the source has been cleared. | ||
2105 | + */ | ||
2106 | +static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id, | ||
2107 | + struct pt_regs *regs) | ||
2108 | +{ | ||
2109 | + struct wm97xx *wm = (struct wm97xx *) dev_id; | ||
2110 | + disable_irq(wm->pen_irq); | ||
2111 | + queue_work(wm->pen_irq_workq, &wm->pen_event_work); | ||
2112 | + return IRQ_HANDLED; | ||
2113 | +} | ||
2114 | + | ||
2115 | +/* | ||
2116 | + * initialise pen IRQ handler and workqueue | ||
2117 | + */ | ||
2118 | +static int wm97xx_init_pen_irq(struct wm97xx *wm) | ||
2119 | +{ | ||
2120 | + u16 reg; | ||
2121 | + | ||
2122 | + INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker, wm); | ||
2123 | + if ((wm->pen_irq_workq = | ||
2124 | + create_singlethread_workqueue("kwm97pen")) == NULL) { | ||
2125 | + err("could not create pen irq work queue"); | ||
2126 | + wm->pen_irq = 0; | ||
2127 | + return -EINVAL; | ||
2128 | + } | ||
2129 | + | ||
2130 | + if (request_irq (wm->pen_irq, wm97xx_pen_interrupt, SA_SHIRQ, "wm97xx-pen", wm)) { | ||
2131 | + err("could not register codec pen down interrupt, will poll for pen down"); | ||
2132 | + destroy_workqueue(wm->pen_irq_workq); | ||
2133 | + wm->pen_irq = 0; | ||
2134 | + return -EINVAL; | ||
2135 | + } | ||
2136 | + | ||
2137 | + /* enable PEN down on wm9712/13 */ | ||
2138 | + if (wm->id != WM9705_ID2) { | ||
2139 | + reg = wm97xx_reg_read(wm, AC97_MISC_AFE); | ||
2140 | + wm97xx_reg_write(wm, AC97_MISC_AFE, reg & 0xfffb); | ||
2141 | + reg = wm97xx_reg_read(wm, 0x5a); | ||
2142 | + wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); | ||
2143 | + } | ||
2144 | + | ||
2145 | + return 0; | ||
2146 | +} | ||
2147 | + | ||
2148 | +/* Private struct for communication between struct wm97xx_tshread | ||
2149 | + * and wm97xx_read_samples */ | ||
2150 | +struct ts_state { | ||
2151 | + int sleep_time; | ||
2152 | + int min_sleep_time; | ||
2153 | +}; | ||
2154 | + | ||
2155 | +static int wm97xx_read_samples(struct wm97xx *wm, struct ts_state *state) | ||
2156 | +{ | ||
2157 | + struct wm97xx_data data; | ||
2158 | + int rc; | ||
2159 | + | ||
2160 | + mutex_lock(&wm->codec_mutex); | ||
2161 | + | ||
2162 | + if (wm->mach_ops && wm->mach_ops->acc_enabled) | ||
2163 | + rc = wm->mach_ops->acc_pen_down(wm); | ||
2164 | + else | ||
2165 | + rc = wm->codec->poll_touch(wm, &data); | ||
2166 | + | ||
2167 | + if (rc & RC_PENUP) { | ||
2168 | + if (wm->pen_is_down) { | ||
2169 | + wm->pen_is_down = 0; | ||
2170 | + dbg("pen up"); | ||
2171 | + input_report_abs(wm->input_dev, ABS_PRESSURE, 0); | ||
2172 | + input_sync(wm->input_dev); | ||
2173 | + } else if (!(rc & RC_AGAIN)) { | ||
2174 | + /* We need high frequency updates only while pen is down, | ||
2175 | + * the user never will be able to touch screen faster than | ||
2176 | + * a few times per second... On the other hand, when the | ||
2177 | + * user is actively working with the touchscreen we don't | ||
2178 | + * want to lose the quick response. So we will slowly | ||
2179 | + * increase sleep time after the pen is up and quicky | ||
2180 | + * restore it to ~one task switch when pen is down again. | ||
2181 | + */ | ||
2182 | + if (state->sleep_time < HZ / 10) | ||
2183 | + state->sleep_time++; | ||
2184 | + } | ||
2185 | + | ||
2186 | + } else if (rc & RC_VALID) { | ||
2187 | + dbg("pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", | ||
2188 | + data.x >> 12, data.x & 0xfff, data.y >> 12, | ||
2189 | + data.y & 0xfff, data.p >> 12, data.p & 0xfff); | ||
2190 | + input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); | ||
2191 | + input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); | ||
2192 | + input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); | ||
2193 | + input_sync(wm->input_dev); | ||
2194 | + wm->pen_is_down = 1; | ||
2195 | + state->sleep_time = state->min_sleep_time; | ||
2196 | + } else if (rc & RC_PENDOWN) { | ||
2197 | + dbg("pen down"); | ||
2198 | + wm->pen_is_down = 1; | ||
2199 | + state->sleep_time = state->min_sleep_time; | ||
2200 | + } | ||
2201 | + | ||
2202 | + mutex_unlock(&wm->codec_mutex); | ||
2203 | + return rc; | ||
2204 | +} | ||
2205 | + | ||
2206 | +/* | ||
2207 | +* The touchscreen sample reader thread. | ||
2208 | +*/ | ||
2209 | +static int wm97xx_ts_read(void *data) | ||
2210 | +{ | ||
2211 | + int rc; | ||
2212 | + struct ts_state state; | ||
2213 | + struct wm97xx *wm = (struct wm97xx *) data; | ||
2214 | + | ||
2215 | + /* set up thread context */ | ||
2216 | + wm->ts_task = current; | ||
2217 | + daemonize("kwm97xxts"); | ||
2218 | + | ||
2219 | + if (wm->codec == NULL) { | ||
2220 | + wm->ts_task = NULL; | ||
2221 | + printk(KERN_ERR "codec is NULL, bailing\n"); | ||
2222 | + } | ||
2223 | + | ||
2224 | + complete(&wm->ts_init); | ||
2225 | + wm->pen_is_down = 0; | ||
2226 | + state.min_sleep_time = HZ >= 100 ? HZ / 100 : 1; | ||
2227 | + if (state.min_sleep_time < 1) | ||
2228 | + state.min_sleep_time = 1; | ||
2229 | + state.sleep_time = state.min_sleep_time; | ||
2230 | + | ||
2231 | + /* touch reader loop */ | ||
2232 | + while (wm->ts_task) { | ||
2233 | + do { | ||
2234 | + try_to_freeze(); | ||
2235 | + rc = wm97xx_read_samples(wm, &state); | ||
2236 | + } while (rc & RC_AGAIN); | ||
2237 | + if (!wm->pen_is_down && wm->pen_irq) { | ||
2238 | + /* Nice, we don't have to poll for pen down event */ | ||
2239 | + wait_event_interruptible(wm->pen_irq_wait, wm->pen_is_down); | ||
2240 | + } else { | ||
2241 | + set_task_state(current, TASK_INTERRUPTIBLE); | ||
2242 | + schedule_timeout(state.sleep_time); | ||
2243 | + } | ||
2244 | + } | ||
2245 | + complete_and_exit(&wm->ts_exit, 0); | ||
2246 | +} | ||
2247 | + | ||
2248 | +/** | ||
2249 | + * wm97xx_ts_input_open - Open the touch screen input device. | ||
2250 | + * @idev: Input device to be opened. | ||
2251 | + * | ||
2252 | + * Called by the input sub system to open a wm97xx touchscreen device. | ||
2253 | + * Starts the touchscreen thread and touch digitiser. | ||
2254 | + */ | ||
2255 | +static int wm97xx_ts_input_open(struct input_dev *idev) | ||
2256 | +{ | ||
2257 | + int ret = 0; | ||
2258 | + struct wm97xx *wm = (struct wm97xx *) idev->private; | ||
2259 | + | ||
2260 | + mutex_lock(&wm->codec_mutex); | ||
2261 | + /* first time opened ? */ | ||
2262 | + if (wm->ts_use_count++ == 0) { | ||
2263 | + /* start touchscreen thread */ | ||
2264 | + init_completion(&wm->ts_init); | ||
2265 | + init_completion(&wm->ts_exit); | ||
2266 | + ret = kernel_thread(wm97xx_ts_read, wm, CLONE_KERNEL); | ||
2267 | + | ||
2268 | + if (ret >= 0) { | ||
2269 | + wait_for_completion(&wm->ts_init); | ||
2270 | + if (wm->ts_task == NULL) | ||
2271 | + ret = -EINVAL; | ||
2272 | + } else { | ||
2273 | + mutex_unlock(&wm->codec_mutex); | ||
2274 | + return ret; | ||
2275 | + } | ||
2276 | + | ||
2277 | + /* start digitiser */ | ||
2278 | + if (wm->mach_ops && wm->mach_ops->acc_enabled) | ||
2279 | + wm->codec->acc_enable(wm, 1); | ||
2280 | + wm->codec->digitiser_ioctl(wm, WM97XX_DIG_START); | ||
2281 | + | ||
2282 | + /* init pen down/up irq handling */ | ||
2283 | + if (wm->pen_irq) { | ||
2284 | + wm97xx_init_pen_irq(wm); | ||
2285 | + | ||
2286 | + if (wm->pen_irq == 0) { | ||
2287 | + /* we failed to get an irq for pen down events, | ||
2288 | + * so we resort to polling. kickstart the reader */ | ||
2289 | + wm->pen_is_down = 1; | ||
2290 | + wake_up_interruptible(&wm->pen_irq_wait); | ||
2291 | + } | ||
2292 | + } | ||
2293 | + } | ||
2294 | + | ||
2295 | + mutex_unlock(&wm->codec_mutex); | ||
2296 | + return 0; | ||
2297 | +} | ||
2298 | + | ||
2299 | +/** | ||
2300 | + * wm97xx_ts_input_close - Close the touch screen input device. | ||
2301 | + * @idev: Input device to be closed. | ||
2302 | + * | ||
2303 | + * Called by the input sub system to close a wm97xx touchscreen device. | ||
2304 | + * Kills the touchscreen thread and stops the touch digitiser. | ||
2305 | + */ | ||
2306 | + | ||
2307 | +static void wm97xx_ts_input_close(struct input_dev *idev) | ||
2308 | +{ | ||
2309 | + struct wm97xx *wm = (struct wm97xx *) idev->private; | ||
2310 | + | ||
2311 | + mutex_lock(&wm->codec_mutex); | ||
2312 | + if (--wm->ts_use_count == 0) { | ||
2313 | + /* destroy workqueues and free irqs */ | ||
2314 | + if (wm->pen_irq) { | ||
2315 | + free_irq(wm->pen_irq, wm); | ||
2316 | + destroy_workqueue(wm->pen_irq_workq); | ||
2317 | + } | ||
2318 | + | ||
2319 | + /* kill thread */ | ||
2320 | + if (wm->ts_task) { | ||
2321 | + wm->ts_task = NULL; | ||
2322 | + wm->pen_is_down = 1; | ||
2323 | + wake_up_interruptible(&wm->pen_irq_wait); | ||
2324 | + wait_for_completion(&wm->ts_exit); | ||
2325 | + wm->pen_is_down = 0; | ||
2326 | + } | ||
2327 | + | ||
2328 | + /* stop digitiser */ | ||
2329 | + wm->codec->digitiser_ioctl(wm, WM97XX_DIG_STOP); | ||
2330 | + if (wm->mach_ops && wm->mach_ops->acc_enabled) | ||
2331 | + wm->codec->acc_enable(wm, 0); | ||
2332 | + } | ||
2333 | + mutex_unlock(&wm->codec_mutex); | ||
2334 | +} | ||
2335 | + | ||
2336 | +static int wm97xx_bus_match(struct device *dev, struct device_driver *drv) | ||
2337 | +{ | ||
2338 | + return !(strcmp(dev->bus_id,drv->name)); | ||
2339 | +} | ||
2340 | + | ||
2341 | +/* | ||
2342 | + * The AC97 audio driver will do all the Codec suspend and resume | ||
2343 | + * tasks. This is just for anything machine specific or extra. | ||
2344 | + */ | ||
2345 | +static int wm97xx_bus_suspend(struct device *dev, pm_message_t state) | ||
2346 | +{ | ||
2347 | + int ret = 0; | ||
2348 | + | ||
2349 | + if (dev->driver && dev->driver->suspend) | ||
2350 | + ret = dev->driver->suspend(dev, state); | ||
2351 | + | ||
2352 | + return ret; | ||
2353 | +} | ||
2354 | + | ||
2355 | +static int wm97xx_bus_resume(struct device *dev) | ||
2356 | +{ | ||
2357 | + int ret = 0; | ||
2358 | + | ||
2359 | + if (dev->driver && dev->driver->resume) | ||
2360 | + ret = dev->driver->resume(dev); | ||
2361 | + | ||
2362 | + return ret; | ||
2363 | +} | ||
2364 | + | ||
2365 | +struct bus_type wm97xx_bus_type = { | ||
2366 | + .name = "wm97xx", | ||
2367 | + .match = wm97xx_bus_match, | ||
2368 | + .suspend = wm97xx_bus_suspend, | ||
2369 | + .resume = wm97xx_bus_resume, | ||
2370 | +}; | ||
2371 | + | ||
2372 | +static void wm97xx_release(struct device *dev) | ||
2373 | +{ | ||
2374 | + kfree(dev); | ||
2375 | +} | ||
2376 | + | ||
2377 | +static int wm97xx_probe(struct device *dev) | ||
2378 | +{ | ||
2379 | + struct wm97xx* wm; | ||
2380 | + int ret = 0, id = 0; | ||
2381 | + | ||
2382 | + if (!(wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL))) | ||
2383 | + return -ENOMEM; | ||
2384 | + mutex_init(&wm->codec_mutex); | ||
2385 | + | ||
2386 | + init_waitqueue_head(&wm->pen_irq_wait); | ||
2387 | + wm->dev = dev; | ||
2388 | + dev->driver_data = wm; | ||
2389 | + wm->ac97 = to_ac97_t(dev); | ||
2390 | + | ||
2391 | + /* check that we have a supported codec */ | ||
2392 | + if ((id = wm97xx_reg_read(wm, AC97_VENDOR_ID1)) != WM97XX_ID1) { | ||
2393 | + err("could not find a wm97xx, found a %x instead\n", id); | ||
2394 | + kfree(wm); | ||
2395 | + return -ENODEV; | ||
2396 | + } | ||
2397 | + | ||
2398 | + wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); | ||
2399 | + if(wm->id != wm97xx_codec.id) { | ||
2400 | + err("could not find a the selected codec, please build for wm97%2x", wm->id & 0xff); | ||
2401 | + kfree(wm); | ||
2402 | + return -ENODEV; | ||
2403 | + } | ||
2404 | + | ||
2405 | + if((wm->input_dev = input_allocate_device()) == NULL) { | ||
2406 | + kfree(wm); | ||
2407 | + return -ENOMEM; | ||
2408 | + } | ||
2409 | + | ||
2410 | + /* set up touch configuration */ | ||
2411 | + info("detected a wm97%2x codec", wm->id & 0xff); | ||
2412 | + wm->input_dev->name = "wm97xx touchscreen"; | ||
2413 | + wm->input_dev->open = wm97xx_ts_input_open; | ||
2414 | + wm->input_dev->close = wm97xx_ts_input_close; | ||
2415 | + set_bit(EV_ABS, wm->input_dev->evbit); | ||
2416 | + set_bit(ABS_X, wm->input_dev->absbit); | ||
2417 | + set_bit(ABS_Y, wm->input_dev->absbit); | ||
2418 | + set_bit(ABS_PRESSURE, wm->input_dev->absbit); | ||
2419 | + wm->input_dev->absmax[ABS_X] = abs_x[1]; | ||
2420 | + wm->input_dev->absmax[ABS_Y] = abs_y[1]; | ||
2421 | + wm->input_dev->absmax[ABS_PRESSURE] = abs_p[1]; | ||
2422 | + wm->input_dev->absmin[ABS_X] = abs_x[0]; | ||
2423 | + wm->input_dev->absmin[ABS_Y] = abs_y[0]; | ||
2424 | + wm->input_dev->absmin[ABS_PRESSURE] = abs_p[0]; | ||
2425 | + wm->input_dev->absfuzz[ABS_X] = abs_x[2]; | ||
2426 | + wm->input_dev->absfuzz[ABS_Y] = abs_y[2]; | ||
2427 | + wm->input_dev->absfuzz[ABS_PRESSURE] = abs_p[2]; | ||
2428 | + wm->input_dev->private = wm; | ||
2429 | + wm->codec = &wm97xx_codec; | ||
2430 | + if((ret = input_register_device(wm->input_dev)) < 0) { | ||
2431 | + kfree(wm); | ||
2432 | + return -ENOMEM; | ||
2433 | + } | ||
2434 | + | ||
2435 | + if(aux_sys) | ||
2436 | + wm97xx_sys_add(dev); | ||
2437 | + | ||
2438 | + /* set up physical characteristics */ | ||
2439 | + wm->codec->digitiser_ioctl(wm, WM97XX_PHY_INIT); | ||
2440 | + | ||
2441 | + /* load gpio cache */ | ||
2442 | + wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); | ||
2443 | + wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); | ||
2444 | + wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); | ||
2445 | + wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); | ||
2446 | + wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); | ||
2447 | + wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); | ||
2448 | + | ||
2449 | + /* register our battery device */ | ||
2450 | + if (!(wm->battery_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { | ||
2451 | + ret = -ENOMEM; | ||
2452 | + goto batt_err; | ||
2453 | + } | ||
2454 | + wm->battery_dev->bus = &wm97xx_bus_type; | ||
2455 | + strcpy(wm->battery_dev->bus_id,"wm97xx-battery"); | ||
2456 | + wm->battery_dev->driver_data = wm; | ||
2457 | + wm->battery_dev->parent = dev; | ||
2458 | + wm->battery_dev->release = wm97xx_release; | ||
2459 | + if((ret = device_register(wm->battery_dev)) < 0) | ||
2460 | + goto batt_reg_err; | ||
2461 | + | ||
2462 | + /* register our extended touch device (for machine specific extensions) */ | ||
2463 | + if (!(wm->touch_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { | ||
2464 | + ret = -ENOMEM; | ||
2465 | + goto touch_err; | ||
2466 | + } | ||
2467 | + wm->touch_dev->bus = &wm97xx_bus_type; | ||
2468 | + strcpy(wm->touch_dev->bus_id,"wm97xx-touchscreen"); | ||
2469 | + wm->touch_dev->driver_data = wm; | ||
2470 | + wm->touch_dev->parent = dev; | ||
2471 | + wm->touch_dev->release = wm97xx_release; | ||
2472 | + if((ret = device_register(wm->touch_dev)) < 0) | ||
2473 | + goto touch_reg_err; | ||
2474 | + | ||
2475 | + return ret; | ||
2476 | + | ||
2477 | +touch_reg_err: | ||
2478 | + kfree(wm->touch_dev); | ||
2479 | +touch_err: | ||
2480 | + device_unregister(wm->battery_dev); | ||
2481 | +batt_reg_err: | ||
2482 | + kfree(wm->battery_dev); | ||
2483 | +batt_err: | ||
2484 | + input_unregister_device(wm->input_dev); | ||
2485 | + kfree(wm); | ||
2486 | + return ret; | ||
2487 | +} | ||
2488 | + | ||
2489 | +static int wm97xx_remove(struct device *dev) | ||
2490 | +{ | ||
2491 | + struct wm97xx *wm = dev_get_drvdata(dev); | ||
2492 | + | ||
2493 | + /* Stop touch reader thread */ | ||
2494 | + if (wm->ts_task) { | ||
2495 | + wm->ts_task = NULL; | ||
2496 | + wm->pen_is_down = 1; | ||
2497 | + wake_up_interruptible(&wm->pen_irq_wait); | ||
2498 | + wait_for_completion(&wm->ts_exit); | ||
2499 | + } | ||
2500 | + device_unregister(wm->battery_dev); | ||
2501 | + device_unregister(wm->touch_dev); | ||
2502 | + input_unregister_device(wm->input_dev); | ||
2503 | + | ||
2504 | + if(aux_sys) | ||
2505 | + wm97xx_sys_remove(dev); | ||
2506 | + | ||
2507 | + kfree(wm); | ||
2508 | + return 0; | ||
2509 | +} | ||
2510 | + | ||
2511 | +#ifdef CONFIG_PM | ||
2512 | +int wm97xx_resume(struct device* dev) | ||
2513 | +{ | ||
2514 | + struct wm97xx *wm = dev_get_drvdata(dev); | ||
2515 | + | ||
2516 | + /* restore digitiser and gpio's */ | ||
2517 | + if(wm->id == WM9713_ID2) { | ||
2518 | + wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); | ||
2519 | + wm97xx_reg_write(wm, 0x5a, wm->misc); | ||
2520 | + if(wm->ts_use_count) { | ||
2521 | + u16 reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; | ||
2522 | + wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); | ||
2523 | + } | ||
2524 | + } | ||
2525 | + | ||
2526 | + wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); | ||
2527 | + wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); | ||
2528 | + | ||
2529 | + wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); | ||
2530 | + wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); | ||
2531 | + wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); | ||
2532 | + wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); | ||
2533 | + wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); | ||
2534 | + wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); | ||
2535 | + | ||
2536 | + return 0; | ||
2537 | +} | ||
2538 | + | ||
2539 | +#else | ||
2540 | +#define wm97xx_resume NULL | ||
2541 | +#endif | ||
2542 | + | ||
2543 | +int wm97xx_register_mach_ops(struct wm97xx *wm, struct wm97xx_mach_ops *mach_ops) | ||
2544 | +{ | ||
2545 | + mutex_lock(&wm->codec_mutex); | ||
2546 | + if(wm->mach_ops) { | ||
2547 | + mutex_unlock(&wm->codec_mutex); | ||
2548 | + return -EINVAL; | ||
2549 | + } | ||
2550 | + wm->mach_ops = mach_ops; | ||
2551 | + mutex_unlock(&wm->codec_mutex); | ||
2552 | + return 0; | ||
2553 | +} | ||
2554 | + | ||
2555 | +void wm97xx_unregister_mach_ops(struct wm97xx *wm) | ||
2556 | +{ | ||
2557 | + mutex_lock(&wm->codec_mutex); | ||
2558 | + wm->mach_ops = NULL; | ||
2559 | + mutex_unlock(&wm->codec_mutex); | ||
2560 | +} | ||
2561 | + | ||
2562 | +static struct device_driver wm97xx_driver = { | ||
2563 | + .name = "ac97", | ||
2564 | + .bus = &ac97_bus_type, | ||
2565 | + .owner = THIS_MODULE, | ||
2566 | + .probe = wm97xx_probe, | ||
2567 | + .remove = wm97xx_remove, | ||
2568 | + .resume = wm97xx_resume, | ||
2569 | +}; | ||
2570 | + | ||
2571 | +static int __init wm97xx_init(void) | ||
2572 | +{ | ||
2573 | + int ret; | ||
2574 | + | ||
2575 | + info("version %s liam.girdwood@wolfsonmicro.com", WM_CORE_VERSION); | ||
2576 | + if((ret = bus_register(&wm97xx_bus_type)) < 0) | ||
2577 | + return ret; | ||
2578 | + return driver_register(&wm97xx_driver); | ||
2579 | +} | ||
2580 | + | ||
2581 | +static void __exit wm97xx_exit(void) | ||
2582 | +{ | ||
2583 | + driver_unregister(&wm97xx_driver); | ||
2584 | + bus_unregister(&wm97xx_bus_type); | ||
2585 | +} | ||
2586 | + | ||
2587 | +EXPORT_SYMBOL_GPL(wm97xx_get_gpio); | ||
2588 | +EXPORT_SYMBOL_GPL(wm97xx_set_gpio); | ||
2589 | +EXPORT_SYMBOL_GPL(wm97xx_config_gpio); | ||
2590 | +EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); | ||
2591 | +EXPORT_SYMBOL_GPL(wm97xx_reg_read); | ||
2592 | +EXPORT_SYMBOL_GPL(wm97xx_reg_write); | ||
2593 | +EXPORT_SYMBOL_GPL(wm97xx_bus_type); | ||
2594 | +EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); | ||
2595 | +EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); | ||
2596 | + | ||
2597 | +module_init(wm97xx_init); | ||
2598 | +module_exit(wm97xx_exit); | ||
2599 | + | ||
2600 | +/* Module information */ | ||
2601 | +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); | ||
2602 | +MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); | ||
2603 | +MODULE_LICENSE("GPL"); | ||
2604 | Index: linux-2.6.17/include/linux/wm97xx.h | ||
2605 | =================================================================== | ||
2606 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | ||
2607 | +++ linux-2.6.17/include/linux/wm97xx.h 2006-09-19 20:36:47.973052250 +0200 | ||
2608 | @@ -0,0 +1,291 @@ | ||
2609 | + | ||
2610 | +/* | ||
2611 | + * Register bits and API for Wolfson WM97xx series of codecs | ||
2612 | + */ | ||
2613 | + | ||
2614 | +#ifndef _LINUX_WM97XX_H | ||
2615 | +#define _LINUX_WM97XX_H | ||
2616 | + | ||
2617 | +#include <sound/driver.h> | ||
2618 | +#include <sound/core.h> | ||
2619 | +#include <sound/pcm.h> | ||
2620 | +#include <sound/ac97_codec.h> | ||
2621 | +#include <sound/initval.h> | ||
2622 | +#include <linux/types.h> | ||
2623 | +#include <linux/list.h> | ||
2624 | +#include <linux/input.h> /* Input device layer */ | ||
2625 | + | ||
2626 | +/* | ||
2627 | + * WM97xx AC97 Touchscreen registers | ||
2628 | + */ | ||
2629 | +#define AC97_WM97XX_DIGITISER1 0x76 | ||
2630 | +#define AC97_WM97XX_DIGITISER2 0x78 | ||
2631 | +#define AC97_WM97XX_DIGITISER_RD 0x7a | ||
2632 | +#define AC97_WM9713_DIG1 0x74 | ||
2633 | +#define AC97_WM9713_DIG2 AC97_WM97XX_DIGITISER1 | ||
2634 | +#define AC97_WM9713_DIG3 AC97_WM97XX_DIGITISER2 | ||
2635 | + | ||
2636 | +/* | ||
2637 | + * WM97xx register bits | ||
2638 | + */ | ||
2639 | +#define WM97XX_POLL 0x8000 /* initiate a polling measurement */ | ||
2640 | +#define WM97XX_ADCSEL_X 0x1000 /* x coord measurement */ | ||
2641 | +#define WM97XX_ADCSEL_Y 0x2000 /* y coord measurement */ | ||
2642 | +#define WM97XX_ADCSEL_PRES 0x3000 /* pressure measurement */ | ||
2643 | +#define WM97XX_ADCSEL_MASK 0x7000 | ||
2644 | +#define WM97XX_COO 0x0800 /* enable coordinate mode */ | ||
2645 | +#define WM97XX_CTC 0x0400 /* enable continuous mode */ | ||
2646 | +#define WM97XX_CM_RATE_93 0x0000 /* 93.75Hz continuous rate */ | ||
2647 | +#define WM97XX_CM_RATE_187 0x0100 /* 187.5Hz continuous rate */ | ||
2648 | +#define WM97XX_CM_RATE_375 0x0200 /* 375Hz continuous rate */ | ||
2649 | +#define WM97XX_CM_RATE_750 0x0300 /* 750Hz continuous rate */ | ||
2650 | +#define WM97XX_CM_RATE_8K 0x00f0 /* 8kHz continuous rate */ | ||
2651 | +#define WM97XX_CM_RATE_12K 0x01f0 /* 12kHz continuous rate */ | ||
2652 | +#define WM97XX_CM_RATE_24K 0x02f0 /* 24kHz continuous rate */ | ||
2653 | +#define WM97XX_CM_RATE_48K 0x03f0 /* 48kHz continuous rate */ | ||
2654 | +#define WM97XX_CM_RATE_MASK 0x03f0 | ||
2655 | +#define WM97XX_RATE(i) (((i & 3) << 8) | ((i & 4) ? 0xf0 : 0)) | ||
2656 | +#define WM97XX_DELAY(i) ((i << 4) & 0x00f0) /* sample delay times */ | ||
2657 | +#define WM97XX_DELAY_MASK 0x00f0 | ||
2658 | +#define WM97XX_SLEN 0x0008 /* slot read back enable */ | ||
2659 | +#define WM97XX_SLT(i) ((i - 5) & 0x7) /* touchpanel slot selection (5-11) */ | ||
2660 | +#define WM97XX_SLT_MASK 0x0007 | ||
2661 | +#define WM97XX_PRP_DETW 0x4000 /* pen detect on, digitiser off, wake up */ | ||
2662 | +#define WM97XX_PRP_DET 0x8000 /* pen detect on, digitiser off, no wake up */ | ||
2663 | +#define WM97XX_PRP_DET_DIG 0xc000 /* pen detect on, digitiser on */ | ||
2664 | +#define WM97XX_RPR 0x2000 /* wake up on pen down */ | ||
2665 | +#define WM97XX_PEN_DOWN 0x8000 /* pen is down */ | ||
2666 | +#define WM97XX_ADCSRC_MASK 0x7000 /* ADC source mask */ | ||
2667 | + | ||
2668 | +#define WM97XX_AUX_ID1 0x8001 | ||
2669 | +#define WM97XX_AUX_ID2 0x8002 | ||
2670 | +#define WM97XX_AUX_ID3 0x8003 | ||
2671 | +#define WM97XX_AUX_ID4 0x8004 | ||
2672 | + | ||
2673 | + | ||
2674 | +/* WM9712 Bits */ | ||
2675 | +#define WM9712_45W 0x1000 /* set for 5-wire touchscreen */ | ||
2676 | +#define WM9712_PDEN 0x0800 /* measure only when pen down */ | ||
2677 | +#define WM9712_WAIT 0x0200 /* wait until adc is read before next sample */ | ||
2678 | +#define WM9712_PIL 0x0100 /* current used for pressure measurement. set 400uA else 200uA */ | ||
2679 | +#define WM9712_MASK_HI 0x0040 /* hi on mask pin (47) stops conversions */ | ||
2680 | +#define WM9712_MASK_EDGE 0x0080 /* rising/falling edge on pin delays sample */ | ||
2681 | +#define WM9712_MASK_SYNC 0x00c0 /* rising/falling edge on mask initiates sample */ | ||
2682 | +#define WM9712_RPU(i) (i&0x3f) /* internal pull up on pen detect (64k / rpu) */ | ||
2683 | +#define WM9712_PD(i) (0x1 << i) /* power management */ | ||
2684 | + | ||
2685 | +/* WM9712 Registers */ | ||
2686 | +#define AC97_WM9712_POWER 0x24 | ||
2687 | +#define AC97_WM9712_REV 0x58 | ||
2688 | + | ||
2689 | +/* WM9705 Bits */ | ||
2690 | +#define WM9705_PDEN 0x1000 /* measure only when pen is down */ | ||
2691 | +#define WM9705_PINV 0x0800 /* inverts sense of pen down output */ | ||
2692 | +#define WM9705_BSEN 0x0400 /* BUSY flag enable, pin47 is 1 when busy */ | ||
2693 | +#define WM9705_BINV 0x0200 /* invert BUSY (pin47) output */ | ||
2694 | +#define WM9705_WAIT 0x0100 /* wait until adc is read before next sample */ | ||
2695 | +#define WM9705_PIL 0x0080 /* current used for pressure measurement. set 400uA else 200uA */ | ||
2696 | +#define WM9705_PHIZ 0x0040 /* set PHONE and PCBEEP inputs to high impedance */ | ||
2697 | +#define WM9705_MASK_HI 0x0010 /* hi on mask stops conversions */ | ||
2698 | +#define WM9705_MASK_EDGE 0x0020 /* rising/falling edge on pin delays sample */ | ||
2699 | +#define WM9705_MASK_SYNC 0x0030 /* rising/falling edge on mask initiates sample */ | ||
2700 | +#define WM9705_PDD(i) (i & 0x000f) /* pen detect comparator threshold */ | ||
2701 | + | ||
2702 | + | ||
2703 | +/* WM9713 Bits */ | ||
2704 | +#define WM9713_PDPOL 0x0400 /* Pen down polarity */ | ||
2705 | +#define WM9713_POLL 0x0200 /* initiate a polling measurement */ | ||
2706 | +#define WM9713_CTC 0x0100 /* enable continuous mode */ | ||
2707 | +#define WM9713_ADCSEL_X 0x0002 /* X measurement */ | ||
2708 | +#define WM9713_ADCSEL_Y 0x0004 /* Y measurement */ | ||
2709 | +#define WM9713_ADCSEL_PRES 0x0008 /* Pressure measurement */ | ||
2710 | +#define WM9713_COO 0x0001 /* enable coordinate mode */ | ||
2711 | +#define WM9713_PDEN 0x0800 /* measure only when pen down */ | ||
2712 | +#define WM9713_ADCSEL_MASK 0x00fe /* ADC selection mask */ | ||
2713 | +#define WM9713_WAIT 0x0200 /* coordinate wait */ | ||
2714 | + | ||
2715 | +/* AUX ADC ID's */ | ||
2716 | +#define TS_COMP1 0x0 | ||
2717 | +#define TS_COMP2 0x1 | ||
2718 | +#define TS_BMON 0x2 | ||
2719 | +#define TS_WIPER 0x3 | ||
2720 | + | ||
2721 | +/* ID numbers */ | ||
2722 | +#define WM97XX_ID1 0x574d | ||
2723 | +#define WM9712_ID2 0x4c12 | ||
2724 | +#define WM9705_ID2 0x4c05 | ||
2725 | +#define WM9713_ID2 0x4c13 | ||
2726 | + | ||
2727 | +/* Codec GPIO's */ | ||
2728 | +#define WM97XX_MAX_GPIO 16 | ||
2729 | +#define WM97XX_GPIO_1 (1 << 1) | ||
2730 | +#define WM97XX_GPIO_2 (1 << 2) | ||
2731 | +#define WM97XX_GPIO_3 (1 << 3) | ||
2732 | +#define WM97XX_GPIO_4 (1 << 4) | ||
2733 | +#define WM97XX_GPIO_5 (1 << 5) | ||
2734 | +#define WM97XX_GPIO_6 (1 << 6) | ||
2735 | +#define WM97XX_GPIO_7 (1 << 7) | ||
2736 | +#define WM97XX_GPIO_8 (1 << 8) | ||
2737 | +#define WM97XX_GPIO_9 (1 << 9) | ||
2738 | +#define WM97XX_GPIO_10 (1 << 10) | ||
2739 | +#define WM97XX_GPIO_11 (1 << 11) | ||
2740 | +#define WM97XX_GPIO_12 (1 << 12) | ||
2741 | +#define WM97XX_GPIO_13 (1 << 13) | ||
2742 | +#define WM97XX_GPIO_14 (1 << 14) | ||
2743 | +#define WM97XX_GPIO_15 (1 << 15) | ||
2744 | + | ||
2745 | + | ||
2746 | +#define AC97_LINK_FRAME 21 /* time in uS for AC97 link frame */ | ||
2747 | + | ||
2748 | + | ||
2749 | +/*---------------- Return codes from sample reading functions ---------------*/ | ||
2750 | + | ||
2751 | +/* More data is available; call the sample gathering function again */ | ||
2752 | +#define RC_AGAIN 0x00000001 | ||
2753 | +/* The returned sample is valid */ | ||
2754 | +#define RC_VALID 0x00000002 | ||
2755 | +/* The pen is up (the first RC_VALID without RC_PENUP means pen is down) */ | ||
2756 | +#define RC_PENUP 0x00000004 | ||
2757 | +/* The pen is down (RC_VALID implies RC_PENDOWN, but sometimes it is helpful | ||
2758 | + to tell the handler that the pen is down but we don't know yet his coords, | ||
2759 | + so the handler should not sleep or wait for pendown irq) */ | ||
2760 | +#define RC_PENDOWN 0x00000008 | ||
2761 | + | ||
2762 | +/* The wm97xx driver provides a private API for writing platform-specific | ||
2763 | + * drivers. | ||
2764 | + */ | ||
2765 | + | ||
2766 | +/* The structure used to return arch specific sampled data into */ | ||
2767 | +struct wm97xx_data { | ||
2768 | + int x; | ||
2769 | + int y; | ||
2770 | + int p; | ||
2771 | +}; | ||
2772 | + | ||
2773 | +/* Codec GPIO status | ||
2774 | + */ | ||
2775 | +typedef enum { | ||
2776 | + WM97XX_GPIO_HIGH, | ||
2777 | + WM97XX_GPIO_LOW | ||
2778 | +} wm97xx_gpio_status_t; | ||
2779 | + | ||
2780 | +/* Codec GPIO direction | ||
2781 | + */ | ||
2782 | +typedef enum { | ||
2783 | + WM97XX_GPIO_IN, | ||
2784 | + WM97XX_GPIO_OUT | ||
2785 | +} wm97xx_gpio_dir_t; | ||
2786 | + | ||
2787 | +/* Codec GPIO polarity | ||
2788 | + */ | ||
2789 | +typedef enum { | ||
2790 | + WM97XX_GPIO_POL_HIGH, | ||
2791 | + WM97XX_GPIO_POL_LOW | ||
2792 | +} wm97xx_gpio_pol_t; | ||
2793 | + | ||
2794 | +/* Codec GPIO sticky | ||
2795 | + */ | ||
2796 | +typedef enum { | ||
2797 | + WM97XX_GPIO_STICKY, | ||
2798 | + WM97XX_GPIO_NOTSTICKY | ||
2799 | +} wm97xx_gpio_sticky_t; | ||
2800 | + | ||
2801 | +/* Codec GPIO wake | ||
2802 | + */ | ||
2803 | +typedef enum { | ||
2804 | + WM97XX_GPIO_WAKE, | ||
2805 | + WM97XX_GPIO_NOWAKE | ||
2806 | +} wm97xx_gpio_wake_t; | ||
2807 | + | ||
2808 | + | ||
2809 | +/* | ||
2810 | + * Digitiser ioctl commands | ||
2811 | + */ | ||
2812 | +#define WM97XX_DIG_START 0x1 | ||
2813 | +#define WM97XX_DIG_STOP 0x2 | ||
2814 | +#define WM97XX_PHY_INIT 0x3 | ||
2815 | +#define WM97XX_AUX_PREPARE 0x4 | ||
2816 | +#define WM97XX_DIG_RESTORE 0x5 | ||
2817 | + | ||
2818 | +struct wm97xx; | ||
2819 | +extern struct wm97xx_codec_drv wm97xx_codec; | ||
2820 | + | ||
2821 | +/* | ||
2822 | + * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs | ||
2823 | + */ | ||
2824 | +struct wm97xx_codec_drv { | ||
2825 | + u16 id; | ||
2826 | + char *name; | ||
2827 | + int (*poll_sample) (struct wm97xx *, int adcsel, int *sample); /* read 1 sample */ | ||
2828 | + int (*poll_touch) (struct wm97xx *, struct wm97xx_data *); /* read X,Y,[P] in poll */ | ||
2829 | + int (*digitiser_ioctl) (struct wm97xx *, int cmd); | ||
2830 | + int (*acc_enable) (struct wm97xx *, int enable); | ||
2831 | +}; | ||
2832 | + | ||
2833 | + | ||
2834 | +/* Machine specific and accelerated touch operations */ | ||
2835 | +struct wm97xx_mach_ops { | ||
2836 | + | ||
2837 | + /* accelerated touch readback - coords are transmited on AC97 link */ | ||
2838 | + int acc_enabled; | ||
2839 | + void (*acc_pen_up) (struct wm97xx *); | ||
2840 | + int (*acc_pen_down) (struct wm97xx *); | ||
2841 | + int (*acc_startup) (struct wm97xx *); | ||
2842 | + void (*acc_shutdown) (struct wm97xx *); | ||
2843 | + | ||
2844 | + /* pre and post sample - can be used to minimise any analog noise */ | ||
2845 | + void (*pre_sample) (int); /* function to run before sampling */ | ||
2846 | + void (*post_sample) (int); /* function to run after sampling */ | ||
2847 | +}; | ||
2848 | + | ||
2849 | +struct wm97xx { | ||
2850 | + u16 dig[3], id, gpio[6], misc; /* Cached codec registers */ | ||
2851 | + u16 dig_save[3]; /* saved during aux reading */ | ||
2852 | + struct wm97xx_codec_drv *codec; /* attached codec driver*/ | ||
2853 | + struct input_dev* input_dev; /* touchscreen input device */ | ||
2854 | + ac97_t *ac97; /* ALSA codec access */ | ||
2855 | + struct device *dev; /* ALSA device */ | ||
2856 | + struct device *battery_dev; | ||
2857 | + struct device *touch_dev; | ||
2858 | + struct wm97xx_mach_ops *mach_ops; | ||
2859 | + struct mutex codec_mutex; | ||
2860 | + struct completion ts_init; | ||
2861 | + struct completion ts_exit; | ||
2862 | + struct task_struct *ts_task; | ||
2863 | + unsigned int pen_irq; /* Pen IRQ number in use */ | ||
2864 | + wait_queue_head_t pen_irq_wait; /* Pen IRQ wait queue */ | ||
2865 | + struct workqueue_struct *pen_irq_workq; | ||
2866 | + struct work_struct pen_event_work; | ||
2867 | + u16 acc_slot; /* AC97 slot used for acc touch data */ | ||
2868 | + u16 acc_rate; /* acc touch data rate */ | ||
2869 | + unsigned int ts_use_count; | ||
2870 | + unsigned pen_is_down:1; /* Pen is down */ | ||
2871 | + unsigned aux_waiting:1; /* aux measurement waiting */ | ||
2872 | + unsigned pen_probably_down:1; /* used in polling mode */ | ||
2873 | +}; | ||
2874 | + | ||
2875 | +/* Codec GPIO access (not supported on WM9705) | ||
2876 | + * This can be used to set/get codec GPIO and Virtual GPIO status. | ||
2877 | + */ | ||
2878 | +wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio); | ||
2879 | +void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, | ||
2880 | + wm97xx_gpio_status_t status); | ||
2881 | +void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, | ||
2882 | + wm97xx_gpio_dir_t dir, | ||
2883 | + wm97xx_gpio_pol_t pol, | ||
2884 | + wm97xx_gpio_sticky_t sticky, | ||
2885 | + wm97xx_gpio_wake_t wake); | ||
2886 | + | ||
2887 | +/* codec AC97 IO access */ | ||
2888 | +int wm97xx_reg_read(struct wm97xx *wm, u16 reg); | ||
2889 | +void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val); | ||
2890 | + | ||
2891 | +/* aux adc readback */ | ||
2892 | +int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel); | ||
2893 | + | ||
2894 | +/* machine ops */ | ||
2895 | +int wm97xx_register_mach_ops(struct wm97xx *, struct wm97xx_mach_ops *); | ||
2896 | +void wm97xx_unregister_mach_ops(struct wm97xx *); | ||
2897 | + | ||
2898 | +extern struct bus_type wm97xx_bus_type; | ||
2899 | +#endif | ||