aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/s3c24xx/patches-2.6.26/0156-add-use-pcf50633-resume-callback-jbt6k74.patch.patch
blob: 99ec4e130c2f88c83d80dfca3cf6e2f0c1245316 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
From b604d51087159af1a18546bf94e16ac6adf74746 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Fri, 25 Jul 2008 23:06:11 +0100
Subject: [PATCH] add-use-pcf50633-resume-callback-jbt6k74.patch

Adds the resume callback stuff to glamo, then changes
jbt6k74 to no longer use a sleeping workqueue, but to
make its resume actions dependent on pcf50633 and
glamo resume (for backlight and communication to LCM
respectively)

Signed-off-by: Andy Green <andy@openmoko.com>
---
 arch/arm/mach-s3c2440/mach-gta02.c |   39 ++++++++++++++++++++-
 drivers/i2c/chips/pcf50633.c       |   17 +++------
 drivers/mfd/glamo/glamo-core.c     |   16 ++++++++
 drivers/mfd/glamo/glamo-core.h     |    3 +-
 drivers/video/display/jbt6k74.c    |   67 +++++++++++++++++++-----------------
 include/linux/glamofb.h            |    3 ++
 include/linux/jbt6k74.h            |    4 ++
 include/linux/pcf50633.h           |    2 +-
 include/linux/resume-dependency.h  |   10 +++---
 9 files changed, 108 insertions(+), 53 deletions(-)

diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index d7882ea..9ba1036 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -88,6 +88,12 @@
 /* arbitrates which sensor IRQ owns the shared SPI bus */
 static spinlock_t motion_irq_lock;
 
+/* the dependency of jbt / LCM on pcf50633 resume */
+struct resume_dependency resume_dep_jbt_pcf;
+/* the dependency of jbt / LCM on glamo resume */
+struct resume_dependency resume_dep_jbt_glamo;
+
+
 /* define FIQ IPC struct */
 /*
  * contains stuff FIQ ISR modifies and normal kernel code can see and use
@@ -857,21 +863,50 @@ static struct s3c2410_ts_mach_info gta02_ts_cfg = {
 
 /* SPI: LCM control interface attached to Glamo3362 */
 
-void gta02_jbt6k74_reset(int devidx, int level)
+static void gta02_jbt6k74_reset(int devidx, int level)
 {
 	glamo_lcm_reset(level);
 }
 
 /* finally bring up deferred backlight resume now LCM is resumed itself */
 
-void gta02_jbt6k74_resuming(int devidx)
+static void gta02_jbt6k74_resuming(int devidx)
 {
 	pcf50633_backlight_resume(pcf50633_global);
 }
 
+static int gta02_jbt6k74_all_dependencies_resumed(int devidx)
+{
+	if (!resume_dep_jbt_pcf.called_flag)
+		return 0;
+
+	if (!resume_dep_jbt_glamo.called_flag)
+		return 0;
+
+	return 1;
+}
+
+/* register jbt resume action to be dependent on pcf50633 and glamo resume */
+
+static void gta02_jbt6k74_suspending(int devindex, struct spi_device *spi)
+{
+	void jbt6k74_resume(void *spi); /* little white lies about types */
+
+	resume_dep_jbt_pcf.callback = jbt6k74_resume;
+	resume_dep_jbt_pcf.context = (void *)spi;
+	pcf50633_register_resume_dependency(pcf50633_global,
+							   &resume_dep_jbt_pcf);
+	resume_dep_jbt_glamo.callback = jbt6k74_resume;
+	resume_dep_jbt_glamo.context = (void *)spi;
+	glamo_register_resume_dependency(&resume_dep_jbt_glamo);
+}
+
+
 const struct jbt6k74_platform_data jbt6k74_pdata = {
 	.reset		= gta02_jbt6k74_reset,
 	.resuming	= gta02_jbt6k74_resuming,
+	.suspending	= gta02_jbt6k74_suspending,
+	.all_dependencies_resumed = gta02_jbt6k74_all_dependencies_resumed,
 };
 
 static struct spi_board_info gta02_spi_board_info[] = {
diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
index e477cd7..e5ffeff 100644
--- a/drivers/i2c/chips/pcf50633.c
+++ b/drivers/i2c/chips/pcf50633.c
@@ -1928,7 +1928,7 @@ static int pcf50633_detect(struct i2c_adapter *adapter, int address, int kind)
 
 	pcf50633_global = data;
 
-	init_resume_dependency_list(data->resume_dependency);
+	init_resume_dependency_list(&data->resume_dependency);
 
 	populate_sysfs_group(data);
 
@@ -2143,11 +2143,11 @@ int pcf50633_report_resumers(struct pcf50633_data *pcf, char *buf)
  */
 
 void pcf50633_register_resume_dependency(struct pcf50633_data *pcf,
-					struct pcf50633_resume_dependency *dep)
+					struct resume_dependency *dep)
 {
-	register_resume_dependency(pcf->resume_dependency, dep);
+	register_resume_dependency(&pcf->resume_dependency, dep);
 }
-EXPORT_SYMBOL_GPL(pcf50633_register_resume_dep);
+EXPORT_SYMBOL_GPL(pcf50633_register_resume_dependency);
 
 
 static int pcf50633_suspend(struct device *dev, pm_message_t state)
@@ -2240,9 +2240,6 @@ static int pcf50633_resume(struct device *dev)
 	struct i2c_client *client = to_i2c_client(dev);
 	struct pcf50633_data *pcf = i2c_get_clientdata(client);
 	int i;
-	struct list_head *pos, *q;
-	struct pcf50633_resume_dependency *dep;
-
 
 	mutex_lock(&pcf->lock);
 
@@ -2270,10 +2267,6 @@ static int pcf50633_resume(struct device *dev)
 		__reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.ledout);
 		__reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.ledena);
 		__reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.leddim);
-	} else { /* force backlight down, platform will restore later */
-		__reg_write(pcf, PCF50633_REG_LEDOUT, 2);
-		__reg_write(pcf, PCF50633_REG_LEDENA, 0x20);
-		__reg_write(pcf, PCF50633_REG_LEDDIM, 1);
 	}
 
 	/* FIXME: one big read? */
@@ -2287,7 +2280,7 @@ static int pcf50633_resume(struct device *dev)
 
 	pcf50633_irq(pcf->irq, pcf);
 
-	callback_all_resume_dependencies(pcf->resume_dependency);
+	callback_all_resume_dependencies(&pcf->resume_dependency);
 
 	return 0;
 }
diff --git a/drivers/mfd/glamo/glamo-core.c b/drivers/mfd/glamo/glamo-core.c
index a6b977b..445ff24 100644
--- a/drivers/mfd/glamo/glamo-core.c
+++ b/drivers/mfd/glamo/glamo-core.c
@@ -1088,6 +1088,8 @@ static int __init glamo_probe(struct platform_device *pdev)
 		goto out_free;
 	}
 
+	init_resume_dependency_list(&glamo->resume_dependency);
+
 	/* register a number of sibling devices whoise IOMEM resources
 	 * are siblings of pdev's IOMEM resource */
 #if 0
@@ -1226,6 +1228,18 @@ static int glamo_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM
+
+/* have to export this because struct glamo_core is opaque */
+
+void glamo_register_resume_dependency(struct resume_dependency *
+							      resume_dependency)
+{
+	register_resume_dependency(&glamo_handle->resume_dependency,
+							     resume_dependency);
+}
+EXPORT_SYMBOL_GPL(glamo_register_resume_dependency);
+
+
 static int glamo_suspend(struct platform_device *pdev, pm_message_t state)
 {
 	glamo_power(glamo_handle, GLAMO_POWER_SUSPEND);
@@ -1235,6 +1249,8 @@ static int glamo_suspend(struct platform_device *pdev, pm_message_t state)
 static int glamo_resume(struct platform_device *pdev)
 {
 	glamo_power(glamo_handle, GLAMO_POWER_ON);
+	callback_all_resume_dependencies(&glamo_handle->resume_dependency);
+
 	return 0;
 }
 #else
diff --git a/drivers/mfd/glamo/glamo-core.h b/drivers/mfd/glamo/glamo-core.h
index cf89f03..1fee059 100644
--- a/drivers/mfd/glamo/glamo-core.h
+++ b/drivers/mfd/glamo/glamo-core.h
@@ -2,7 +2,7 @@
 #define __GLAMO_CORE_H
 
 #include <asm/system.h>
-
+#include <linux/resume-dependency.h>
 
 /* for the time being, we put the on-screen framebuffer into the lowest
  * VRAM space.  This should make the code easily compatible with the various
@@ -29,6 +29,7 @@ struct glamo_core {
 	u_int16_t type;
 	u_int16_t revision;
 	spinlock_t lock;
+	struct resume_dependency resume_dependency;
 };
 
 struct glamo_script {
diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c
index 178e2da..8e7bf36 100644
--- a/drivers/video/display/jbt6k74.c
+++ b/drivers/video/display/jbt6k74.c
@@ -27,11 +27,8 @@
 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
-#include <linux/workqueue.h>
 #include <linux/jbt6k74.h>
 
-#include <linux/spi/spi.h>
-
 enum jbt_register {
 	JBT_REG_SLEEP_IN		= 0x10,
 	JBT_REG_SLEEP_OUT		= 0x11,
@@ -116,14 +113,12 @@ struct jbt_info {
 	struct mutex lock;		/* protects tx_buf and reg_cache */
 	u16 tx_buf[8];
 	u16 reg_cache[0xEE];
-	struct work_struct work;
+	int have_resumed;
 };
 
 #define JBT_COMMAND	0x000
 #define JBT_DATA	0x100
 
-static void jbt_resume_work(struct work_struct *work);
-
 
 static int jbt_reg_write_nodata(struct jbt_info *jbt, u8 reg)
 {
@@ -576,8 +571,6 @@ static int __devinit jbt_probe(struct spi_device *spi)
 	if (!jbt)
 		return -ENOMEM;
 
-	INIT_WORK(&jbt->work, jbt_resume_work);
-
 	jbt->spi_dev = spi;
 	jbt->state = JBT_STATE_DEEP_STANDBY;
 	mutex_init(&jbt->lock);
@@ -635,27 +628,48 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
 	struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
 	struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
 
+	/* platform needs to register resume dependencies here */
+	if (jbt6k74_pdata->suspending)
+		(jbt6k74_pdata->suspending)(0, spi);
+
 	/* Save mode for resume */
 	jbt->last_state = jbt->state;
 	jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
 
-	(jbt6k74_pdata->reset)(0, 0);
+	jbt->have_resumed = 0;
+
+//	(jbt6k74_pdata->reset)(0, 0);
 
 	return 0;
 }
 
-static void jbt_resume_work(struct work_struct *work)
+int jbt6k74_resume(struct spi_device *spi)
 {
-	struct jbt_info *jbt = container_of(work, struct jbt_info, work);
-	struct jbt6k74_platform_data *jbt6k74_pdata =
-						jbt->spi_dev->dev.platform_data;
+	struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
+	struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
+
+	/* if we still wait on dependencies, exit because we will get called
+	 * again.  This guy will get called once by core resume action, and
+	 * should be set as resume_dependency callback for any dependencies
+	 * set by platform code.
+	 */
 
-	printk(KERN_INFO"jbt_resume_work waiting...\n");
-	/* 100ms is not enough here 2008-05-08 andy@openmoko.com
-	 * if CONFIG_PM_DEBUG is enabled 2000ms is required
+	if (jbt6k74_pdata->all_dependencies_resumed)
+		if (!(jbt6k74_pdata->all_dependencies_resumed)(0))
+			return 0;
+
+	/* we can get called twice with all dependencies resumed if our core
+	 * resume callback is last of all.  Protect against going twice
 	 */
-	msleep(400);
-	printk(KERN_INFO"jbt_resume_work GO...\n");
+	if (jbt->have_resumed)
+		return 0;
+
+	jbt->have_resumed = 1;
+
+	/* OK we are sure all devices we depend on for operation are up now */
+
+	/* even this needs glamo up on GTA02 :-/ */
+	(jbt6k74_pdata->reset)(0, 1);
 
 	jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
 	msleep(100);
@@ -675,21 +689,10 @@ static void jbt_resume_work(struct work_struct *work)
 	if (jbt6k74_pdata->resuming)
 		(jbt6k74_pdata->resuming)(0);
 
-	printk(KERN_INFO"jbt_resume_work done...\n");
-}
-
-static int jbt_resume(struct spi_device *spi)
-{
-	struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
-	struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
-
-	(jbt6k74_pdata->reset)(0, 1);
-
-	if (!schedule_work(&jbt->work))
-		dev_err(&spi->dev, "Unable to schedule LCM wakeup work\n");
-
 	return 0;
 }
+EXPORT_SYMBOL_GPL(jbt6k74_resume);
+
 #else
 #define jbt_suspend	NULL
 #define jbt_resume	NULL
@@ -704,7 +707,7 @@ static struct spi_driver jbt6k74_driver = {
 	.probe	 = jbt_probe,
 	.remove	 = __devexit_p(jbt_remove),
 	.suspend = jbt_suspend,
-	.resume	 = jbt_resume,
+	.resume	 = jbt6k74_resume,
 };
 
 static int __init jbt_init(void)
diff --git a/include/linux/glamofb.h b/include/linux/glamofb.h
index 51bf593..bb4ed0a 100644
--- a/include/linux/glamofb.h
+++ b/include/linux/glamofb.h
@@ -2,6 +2,7 @@
 #define _LINUX_GLAMOFB_H
 
 #include <linux/spi/glamo.h>
+#include <linux/resume-dependency.h>
 
 struct glamofb_val {
 	unsigned int defval;
@@ -36,5 +37,7 @@ struct glamofb_platform_data {
 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on);
 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val);
 void glamo_lcm_reset(int level);
+extern void
+glamo_register_resume_dependency(struct resume_dependency * resume_dependency);
 
 #endif
diff --git a/include/linux/jbt6k74.h b/include/linux/jbt6k74.h
index 0ac9124..f0eaf39 100644
--- a/include/linux/jbt6k74.h
+++ b/include/linux/jbt6k74.h
@@ -1,9 +1,13 @@
 #ifndef __JBT6K74_H__
 #define __JBT6K74_H__
 
+#include <linux/spi/spi.h>
+
 struct jbt6k74_platform_data {
 	void (*reset)(int devindex, int level);
 	void (*resuming)(int devindex); /* called when LCM is resumed */
+	void (*suspending)(int devindex, struct spi_device *spi);
+	int (*all_dependencies_resumed)(int devindex);
 };
 
 #endif
diff --git a/include/linux/pcf50633.h b/include/linux/pcf50633.h
index 2bef616..8a75b28 100644
--- a/include/linux/pcf50633.h
+++ b/include/linux/pcf50633.h
@@ -127,7 +127,7 @@ pcf50633_report_resumers(struct pcf50633_data *pcf, char *buf);
 
 extern void
 pcf50633_register_resume_dependency(struct pcf50633_data *pcf,
-					struct pcf50633_resume_dependency *dep);
+					struct resume_dependency *dep);
 
 
 #define PCF50633_FEAT_EXTON	0x00000001	/* not yet supported */
diff --git a/include/linux/resume-dependency.h b/include/linux/resume-dependency.h
index b13aa3e..e0c0f33 100644
--- a/include/linux/resume-dependency.h
+++ b/include/linux/resume-dependency.h
@@ -38,7 +38,7 @@ struct resume_dependency {
  */
 
 #define init_resume_dependency_list(_head) \
-	INIT_LIST_HEAD(&_head.list);
+	INIT_LIST_HEAD(&(_head)->list);
 
 
 /* if your resume function depends on something else being resumed first, you
@@ -48,8 +48,8 @@ struct resume_dependency {
  */
 
 #define register_resume_dependency(_head, _dep) { \
-	_dep->called_flag = 0; \
-	list_add(&_dep->list, &_head->list); \
+	(_dep)->called_flag = 0; \
+	list_add(&(_dep)->list, &(_head)->list); \
 }
 
 /* In the resume function that things can be dependent on, at the end you
@@ -61,10 +61,10 @@ struct resume_dependency {
 	struct list_head *_pos, *_q; \
 	struct resume_dependency *_dep; \
 \
-	list_for_each_safe(pos, _q, &_head.list) { \
+	list_for_each_safe(_pos, _q, &((_head)->list)) { \
 		_dep = list_entry(_pos, struct resume_dependency, list); \
 		_dep->called_flag = 1; \
-		(_dep->callback)(dep->context); \
+		(_dep->callback)(_dep->context); \
 		list_del(_pos); \
 	} \
 }
-- 
1.5.6.3