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1 | /* |
2 | * tps65010 - driver for tps6501x power management chips | |
3 | * | |
4 | * Copyright (C) 2004 Texas Instruments | |
5 | * Copyright (C) 2004-2005 David Brownell | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | #undef DEBUG | |
22 | ||
23 | #include <linux/config.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/workqueue.h> | |
33 | #include <linux/suspend.h> | |
34 | #include <linux/debugfs.h> | |
35 | #include <linux/seq_file.h> | |
36 | ||
37 | #include <asm/irq.h> | |
38 | #include <asm/mach-types.h> | |
39 | ||
40 | #include <asm/arch/gpio.h> | |
41 | #include <asm/arch/mux.h> | |
42 | #include <asm/arch/tps65010.h> | |
43 | ||
44 | /*-------------------------------------------------------------------------*/ | |
45 | ||
46 | #define DRIVER_VERSION "2 May 2005" | |
47 | #define DRIVER_NAME (tps65010_driver.name) | |
48 | ||
49 | MODULE_DESCRIPTION("TPS6501x Power Management Driver"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | /* only two addresses possible */ | |
53 | #define TPS_BASE 0x48 | |
54 | static unsigned short normal_i2c[] = { | |
55 | TPS_BASE, | |
56 | I2C_CLIENT_END }; | |
57 | static unsigned short normal_i2c_range[] = { I2C_CLIENT_END }; | |
58 | ||
59 | I2C_CLIENT_INSMOD; | |
60 | ||
61 | static struct i2c_driver tps65010_driver; | |
62 | ||
63 | /*-------------------------------------------------------------------------*/ | |
64 | ||
65 | /* This driver handles a family of multipurpose chips, which incorporate | |
66 | * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, | |
67 | * and other features often needed in portable devices like cell phones | |
68 | * or digital cameras. | |
69 | * | |
70 | * The tps65011 and tps65013 have different voltage settings compared | |
71 | * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. | |
72 | * All except tps65010 have "wait" mode, possibly defaulted so that | |
73 | * battery-insert != device-on. | |
74 | * | |
75 | * We could distinguish between some models by checking VDCDC1.UVLO or | |
76 | * other registers, unless they've been changed already after powerup | |
77 | * as part of board setup by a bootloader. | |
78 | */ | |
79 | enum tps_model { | |
80 | TPS_UNKNOWN = 0, | |
81 | TPS65010, | |
82 | TPS65011, | |
83 | TPS65012, | |
84 | TPS65013, | |
85 | }; | |
86 | ||
87 | struct tps65010 { | |
88 | struct i2c_client client; | |
89 | struct semaphore lock; | |
90 | int irq; | |
91 | struct work_struct work; | |
92 | struct dentry *file; | |
93 | unsigned charging:1; | |
94 | unsigned por:1; | |
95 | unsigned model:8; | |
96 | u16 vbus; | |
97 | unsigned long flags; | |
98 | #define FLAG_VBUS_CHANGED 0 | |
99 | #define FLAG_IRQ_ENABLE 1 | |
100 | ||
101 | /* copies of last register state */ | |
102 | u8 chgstatus, regstatus, chgconf; | |
103 | u8 nmask1, nmask2; | |
104 | ||
105 | /* plus four GPIOs, probably used to switch power */ | |
106 | }; | |
107 | ||
108 | #define POWER_POLL_DELAY msecs_to_jiffies(800) | |
109 | ||
110 | /*-------------------------------------------------------------------------*/ | |
111 | ||
112 | #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) | |
113 | ||
114 | static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) | |
115 | { | |
116 | snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", | |
117 | chgstatus, | |
118 | (chgstatus & TPS_CHG_USB) ? " USB" : "", | |
119 | (chgstatus & TPS_CHG_AC) ? " AC" : "", | |
120 | (chgstatus & TPS_CHG_THERM) ? " therm" : "", | |
121 | (chgstatus & TPS_CHG_TERM) ? " done" : | |
122 | ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
123 | ? " (charging)" : ""), | |
124 | (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", | |
125 | (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", | |
126 | (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", | |
127 | (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); | |
128 | } | |
129 | ||
130 | static void dbg_regstat(char *buf, size_t len, u8 regstatus) | |
131 | { | |
132 | snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", | |
133 | regstatus, | |
134 | (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", | |
135 | (regstatus & TPS_REG_COVER) ? " uncover" : "", | |
136 | (regstatus & TPS_REG_UVLO) ? " UVLO" : "", | |
137 | (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", | |
138 | (regstatus & TPS_REG_PG_LD02) ? " ld01_bad" : "", | |
139 | (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", | |
140 | (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", | |
141 | (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); | |
142 | } | |
143 | ||
144 | static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) | |
145 | { | |
146 | char *hibit; | |
147 | ||
148 | if (por) | |
149 | hibit = (chgconfig & TPS_CHARGE_POR) | |
150 | ? "POR=69ms" : "POR=1sec"; | |
151 | else | |
152 | hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; | |
153 | ||
154 | snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", | |
155 | chgconfig, hibit, | |
156 | (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", | |
157 | (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", | |
158 | ({int p; switch ((chgconfig >> 3) & 3) { | |
159 | case 3: p = 100; break; | |
160 | case 2: p = 75; break; | |
161 | case 1: p = 50; break; | |
162 | default: p = 25; break; | |
163 | }; p; }), | |
164 | (chgconfig & TPS_VBUS_CHARGING) | |
165 | ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) | |
166 | : 0, | |
167 | (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); | |
168 | } | |
169 | ||
170 | #endif | |
171 | ||
172 | #ifdef DEBUG | |
173 | ||
174 | static void show_chgstatus(const char *label, u8 chgstatus) | |
175 | { | |
176 | char buf [100]; | |
177 | ||
178 | dbg_chgstat(buf, sizeof buf, chgstatus); | |
179 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
180 | } | |
181 | ||
182 | static void show_regstatus(const char *label, u8 regstatus) | |
183 | { | |
184 | char buf [100]; | |
185 | ||
186 | dbg_regstat(buf, sizeof buf, regstatus); | |
187 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
188 | } | |
189 | ||
190 | static void show_chgconfig(int por, const char *label, u8 chgconfig) | |
191 | { | |
192 | char buf [100]; | |
193 | ||
194 | dbg_chgconf(por, buf, sizeof buf, chgconfig); | |
195 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
196 | } | |
197 | ||
198 | #else | |
199 | ||
200 | static inline void show_chgstatus(const char *label, u8 chgstatus) { } | |
201 | static inline void show_regstatus(const char *label, u8 chgstatus) { } | |
202 | static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } | |
203 | ||
204 | #endif | |
205 | ||
206 | #ifdef CONFIG_DEBUG_FS | |
207 | ||
208 | static int dbg_show(struct seq_file *s, void *_) | |
209 | { | |
210 | struct tps65010 *tps = s->private; | |
211 | u8 value, v2; | |
212 | unsigned i; | |
213 | char buf[100]; | |
214 | const char *chip; | |
215 | ||
216 | switch (tps->model) { | |
217 | case TPS65010: chip = "tps65010"; break; | |
218 | case TPS65011: chip = "tps65011"; break; | |
219 | case TPS65012: chip = "tps65012"; break; | |
220 | case TPS65013: chip = "tps65013"; break; | |
221 | default: chip = NULL; break; | |
222 | } | |
223 | seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", | |
224 | DRIVER_NAME, DRIVER_VERSION, chip); | |
225 | ||
226 | down(&tps->lock); | |
227 | ||
228 | /* FIXME how can we tell whether a battery is present? | |
229 | * likely involves a charge gauging chip (like BQ26501). | |
230 | */ | |
231 | ||
232 | seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); | |
233 | ||
234 | ||
235 | /* registers for monitoring battery charging and status; note | |
236 | * that reading chgstat and regstat may ack IRQs... | |
237 | */ | |
238 | value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
239 | dbg_chgconf(tps->por, buf, sizeof buf, value); | |
240 | seq_printf(s, "chgconfig %s", buf); | |
241 | ||
242 | value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS); | |
243 | dbg_chgstat(buf, sizeof buf, value); | |
244 | seq_printf(s, "chgstat %s", buf); | |
245 | value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1); | |
246 | dbg_chgstat(buf, sizeof buf, value); | |
247 | seq_printf(s, "mask1 %s", buf); | |
248 | /* ignore ackint1 */ | |
249 | ||
250 | value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS); | |
251 | dbg_regstat(buf, sizeof buf, value); | |
252 | seq_printf(s, "regstat %s", buf); | |
253 | value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2); | |
254 | dbg_regstat(buf, sizeof buf, value); | |
255 | seq_printf(s, "mask2 %s\n", buf); | |
256 | /* ignore ackint2 */ | |
257 | ||
258 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
259 | ||
260 | ||
261 | /* VMAIN voltage, enable lowpower, etc */ | |
262 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1); | |
263 | seq_printf(s, "vdcdc1 %02x\n", value); | |
264 | ||
265 | /* VCORE voltage, vibrator on/off */ | |
266 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2); | |
267 | seq_printf(s, "vdcdc2 %02x\n", value); | |
268 | ||
269 | /* both LD0s, and their lowpower behavior */ | |
270 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1); | |
271 | seq_printf(s, "vregs1 %02x\n\n", value); | |
272 | ||
273 | ||
274 | /* LEDs and GPIOs */ | |
275 | value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON); | |
276 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER); | |
277 | seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", | |
278 | (value & 0x80) | |
279 | ? ((v2 & 0x80) ? "on" : "off") | |
280 | : ((v2 & 0x80) ? "blink" : "(nPG)"), | |
281 | value, v2, | |
282 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
283 | ||
284 | value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON); | |
285 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER); | |
286 | seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", | |
287 | (value & 0x80) | |
288 | ? ((v2 & 0x80) ? "on" : "off") | |
289 | : ((v2 & 0x80) ? "blink" : "off"), | |
290 | value, v2, | |
291 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
292 | ||
293 | value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO); | |
294 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3); | |
295 | seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); | |
296 | ||
297 | for (i = 0; i < 4; i++) { | |
298 | if (value & (1 << (4 +i))) | |
299 | seq_printf(s, " gpio%d-out %s\n", i + 1, | |
300 | (value & (1 << i)) ? "low" : "hi "); | |
301 | else | |
302 | seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, | |
303 | (value & (1 << i)) ? "hi " : "low", | |
304 | (v2 & (1 << i)) ? "no-irq" : "irq", | |
305 | (v2 & (1 << (4 + i))) ? "rising" : "falling"); | |
306 | } | |
307 | ||
308 | up(&tps->lock); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int dbg_tps_open(struct inode *inode, struct file *file) | |
313 | { | |
314 | return single_open(file, dbg_show, inode->u.generic_ip); | |
315 | } | |
316 | ||
317 | static struct file_operations debug_fops = { | |
318 | .open = dbg_tps_open, | |
319 | .read = seq_read, | |
320 | .llseek = seq_lseek, | |
321 | .release = single_release, | |
322 | }; | |
323 | ||
324 | #define DEBUG_FOPS &debug_fops | |
325 | ||
326 | #else | |
327 | #define DEBUG_FOPS NULL | |
328 | #endif | |
329 | ||
330 | /*-------------------------------------------------------------------------*/ | |
331 | ||
332 | /* handle IRQS in a task context, so we can use I2C calls */ | |
333 | static void tps65010_interrupt(struct tps65010 *tps) | |
334 | { | |
335 | u8 tmp = 0, mask, poll; | |
336 | ||
337 | /* IRQs won't trigger irqs for certain events, but we can get | |
338 | * others by polling (normally, with external power applied). | |
339 | */ | |
340 | poll = 0; | |
341 | ||
342 | /* regstatus irqs */ | |
343 | if (tps->nmask2) { | |
344 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS); | |
345 | mask = tmp ^ tps->regstatus; | |
346 | tps->regstatus = tmp; | |
347 | mask &= tps->nmask2; | |
348 | } else | |
349 | mask = 0; | |
350 | if (mask) { | |
351 | tps->regstatus = tmp; | |
352 | /* may need to shut something down ... */ | |
353 | ||
354 | /* "off" usually means deep sleep */ | |
355 | if (tmp & TPS_REG_ONOFF) { | |
356 | pr_info("%s: power off button\n", DRIVER_NAME); | |
357 | #if 0 | |
358 | /* REVISIT: this might need its own workqueue | |
359 | * plus tweaks including deadlock avoidance ... | |
360 | */ | |
361 | software_suspend(); | |
362 | #endif | |
363 | poll = 1; | |
364 | } | |
365 | } | |
366 | ||
367 | /* chgstatus irqs */ | |
368 | if (tps->nmask1) { | |
369 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS); | |
370 | mask = tmp ^ tps->chgstatus; | |
371 | tps->chgstatus = tmp; | |
372 | mask &= tps->nmask1; | |
373 | } else | |
374 | mask = 0; | |
375 | if (mask) { | |
376 | unsigned charging = 0; | |
377 | ||
378 | show_chgstatus("chg/irq", tmp); | |
379 | if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) | |
380 | show_chgconfig(tps->por, "conf", tps->chgconf); | |
381 | ||
382 | /* Unless it was turned off or disabled, we charge any | |
383 | * battery whenever there's power available for it | |
384 | * and the charger hasn't been disabled. | |
385 | */ | |
386 | if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) | |
387 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
388 | && (tps->chgconf & TPS_CHARGE_ENABLE) | |
389 | ) { | |
390 | if (tps->chgstatus & TPS_CHG_USB) { | |
391 | /* VBUS options are readonly until reconnect */ | |
392 | if (mask & TPS_CHG_USB) | |
393 | set_bit(FLAG_VBUS_CHANGED, &tps->flags); | |
394 | charging = 1; | |
395 | } else if (tps->chgstatus & TPS_CHG_AC) | |
396 | charging = 1; | |
397 | } | |
398 | if (charging != tps->charging) { | |
399 | tps->charging = charging; | |
400 | pr_info("%s: battery %scharging\n", | |
401 | DRIVER_NAME, charging ? "" : | |
402 | ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
403 | ? "NOT " : "dis")); | |
404 | } | |
405 | } | |
406 | ||
407 | /* always poll to detect (a) power removal, without tps65013 | |
408 | * NO_CHG IRQ; or (b) restart of charging after stop. | |
409 | */ | |
410 | if ((tps->model != TPS65013 || !tps->charging) | |
411 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) | |
412 | poll = 1; | |
413 | if (poll) | |
414 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
415 | ||
416 | /* also potentially gpio-in rise or fall */ | |
417 | } | |
418 | ||
419 | /* handle IRQs and polling using keventd for now */ | |
420 | static void tps65010_work(void *_tps) | |
421 | { | |
422 | struct tps65010 *tps = _tps; | |
423 | ||
424 | down(&tps->lock); | |
425 | ||
426 | tps65010_interrupt(tps); | |
427 | ||
428 | if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { | |
429 | int status; | |
430 | u8 chgconfig, tmp; | |
431 | ||
432 | chgconfig = i2c_smbus_read_byte_data(&tps->client, | |
433 | TPS_CHGCONFIG); | |
434 | chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); | |
435 | if (tps->vbus == 500) | |
436 | chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; | |
437 | else if (tps->vbus >= 100) | |
438 | chgconfig |= TPS_VBUS_CHARGING; | |
439 | ||
440 | status = i2c_smbus_write_byte_data(&tps->client, | |
441 | TPS_CHGCONFIG, chgconfig); | |
442 | ||
443 | /* vbus update fails unless VBUS is connected! */ | |
444 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
445 | tps->chgconf = tmp; | |
446 | show_chgconfig(tps->por, "update vbus", tmp); | |
447 | } | |
448 | ||
449 | if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) | |
450 | enable_irq(tps->irq); | |
451 | ||
452 | up(&tps->lock); | |
453 | } | |
454 | ||
455 | static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs) | |
456 | { | |
457 | struct tps65010 *tps = _tps; | |
458 | ||
459 | disable_irq_nosync(irq); | |
460 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); | |
461 | (void) schedule_work(&tps->work); | |
462 | return IRQ_HANDLED; | |
463 | } | |
464 | ||
465 | /*-------------------------------------------------------------------------*/ | |
466 | ||
467 | static struct tps65010 *the_tps; | |
468 | ||
469 | static int __exit tps65010_detach_client(struct i2c_client *client) | |
470 | { | |
471 | struct tps65010 *tps; | |
472 | ||
473 | tps = container_of(client, struct tps65010, client); | |
474 | #ifdef CONFIG_ARM | |
475 | if (machine_is_omap_h2()) | |
476 | omap_free_gpio(58); | |
477 | if (machine_is_omap_osk()) | |
478 | omap_free_gpio(OMAP_MPUIO(1)); | |
479 | #endif | |
480 | free_irq(tps->irq, tps); | |
481 | debugfs_remove(tps->file); | |
482 | if (i2c_detach_client(client) == 0) | |
483 | kfree(tps); | |
484 | the_tps = 0; | |
485 | return 0; | |
486 | } | |
487 | ||
488 | static int tps65010_noscan(struct i2c_adapter *bus) | |
489 | { | |
490 | /* pure paranoia, in case someone adds another i2c bus | |
491 | * after our init section's gone... | |
492 | */ | |
493 | return -ENODEV; | |
494 | } | |
495 | ||
496 | /* no error returns, they'd just make bus scanning stop */ | |
497 | static int __init | |
498 | tps65010_probe(struct i2c_adapter *bus, int address, int kind) | |
499 | { | |
500 | struct tps65010 *tps; | |
501 | int status; | |
502 | ||
503 | if (the_tps) { | |
504 | dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME); | |
505 | return 0; | |
506 | } | |
507 | ||
508 | tps = kmalloc(sizeof *tps, GFP_KERNEL); | |
509 | if (!tps) | |
510 | return 0; | |
511 | ||
512 | memset(tps, 0, sizeof *tps); | |
513 | init_MUTEX(&tps->lock); | |
514 | INIT_WORK(&tps->work, tps65010_work, tps); | |
515 | tps->irq = -1; | |
516 | tps->client.addr = address; | |
517 | i2c_set_clientdata(&tps->client, tps); | |
518 | tps->client.adapter = bus; | |
519 | tps->client.driver = &tps65010_driver; | |
520 | strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE); | |
521 | ||
522 | status = i2c_attach_client(&tps->client); | |
523 | if (status < 0) { | |
524 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
525 | DRIVER_NAME, address, status); | |
526 | fail1: | |
527 | kfree(tps); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | #ifdef CONFIG_ARM | |
532 | if (machine_is_omap_h2()) { | |
533 | tps->model = TPS65010; | |
534 | omap_cfg_reg(W4_GPIO58); | |
535 | tps->irq = OMAP_GPIO_IRQ(58); | |
536 | omap_request_gpio(58); | |
537 | omap_set_gpio_direction(58, 1); | |
538 | omap_set_gpio_edge_ctrl(58, OMAP_GPIO_FALLING_EDGE); | |
539 | } | |
540 | if (machine_is_omap_osk()) { | |
541 | tps->model = TPS65010; | |
542 | // omap_cfg_reg(U19_1610_MPUIO1); | |
543 | tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1)); | |
544 | omap_request_gpio(OMAP_MPUIO(1)); | |
545 | omap_set_gpio_direction(OMAP_MPUIO(1), 1); | |
546 | omap_set_gpio_edge_ctrl(OMAP_MPUIO(1), OMAP_GPIO_FALLING_EDGE); | |
547 | } | |
548 | if (machine_is_omap_h3()) { | |
549 | tps->model = TPS65013; | |
550 | ||
551 | // FIXME set up this board's IRQ ... | |
552 | } | |
553 | #else | |
554 | #define set_irq_type(num,trigger) do{}while(0) | |
555 | #endif | |
556 | ||
557 | if (tps->irq > 0) { | |
558 | set_irq_type(tps->irq, IRQT_LOW); | |
559 | status = request_irq(tps->irq, tps65010_irq, | |
560 | SA_SAMPLE_RANDOM, DRIVER_NAME, tps); | |
561 | if (status < 0) { | |
562 | dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n", | |
563 | tps->irq, status); | |
564 | i2c_detach_client(&tps->client); | |
565 | goto fail1; | |
566 | } | |
567 | #ifdef CONFIG_ARM | |
568 | /* annoying race here, ideally we'd have an option | |
569 | * to claim the irq now and enable it later. | |
570 | */ | |
571 | disable_irq(tps->irq); | |
572 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); | |
573 | #endif | |
574 | } else | |
575 | printk(KERN_WARNING "%s: IRQ not configured!\n", | |
576 | DRIVER_NAME); | |
577 | ||
578 | ||
579 | switch (tps->model) { | |
580 | case TPS65010: | |
581 | case TPS65012: | |
582 | tps->por = 1; | |
583 | break; | |
584 | case TPS_UNKNOWN: | |
585 | printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME); | |
586 | break; | |
587 | /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ | |
588 | } | |
589 | tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
590 | show_chgconfig(tps->por, "conf/init", tps->chgconf); | |
591 | ||
592 | show_chgstatus("chg/init", | |
593 | i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS)); | |
594 | show_regstatus("reg/init", | |
595 | i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS)); | |
596 | ||
597 | pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, | |
598 | i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1), | |
599 | i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2), | |
600 | i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1)); | |
601 | pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, | |
602 | i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO), | |
603 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); | |
604 | ||
605 | tps65010_driver.attach_adapter = tps65010_noscan; | |
606 | the_tps = tps; | |
607 | ||
608 | #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) | |
609 | /* USB hosts can't draw VBUS. OTG devices could, later | |
610 | * when OTG infrastructure enables it. USB peripherals | |
611 | * could be relying on VBUS while booting, though. | |
612 | */ | |
613 | tps->vbus = 100; | |
614 | #endif | |
615 | ||
616 | /* unmask the "interesting" irqs, then poll once to | |
617 | * kickstart monitoring, initialize shadowed status | |
618 | * registers, and maybe disable VBUS draw. | |
619 | */ | |
620 | tps->nmask1 = ~0; | |
621 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1); | |
622 | ||
623 | tps->nmask2 = TPS_REG_ONOFF; | |
624 | if (tps->model == TPS65013) | |
625 | tps->nmask2 |= TPS_REG_NO_CHG; | |
626 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2); | |
627 | ||
628 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f | |
629 | | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); | |
630 | ||
631 | tps65010_work(tps); | |
632 | ||
633 | tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, | |
634 | tps, DEBUG_FOPS); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int __init tps65010_scan_bus(struct i2c_adapter *bus) | |
639 | { | |
640 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA)) | |
641 | return -EINVAL; | |
642 | return i2c_probe(bus, &addr_data, tps65010_probe); | |
643 | } | |
644 | ||
645 | static struct i2c_driver tps65010_driver = { | |
646 | .owner = THIS_MODULE, | |
647 | .name = "tps65010", | |
648 | .id = 888, /* FIXME assign "official" value */ | |
649 | .flags = I2C_DF_NOTIFY, | |
650 | .attach_adapter = tps65010_scan_bus, | |
651 | .detach_client = __exit_p(tps65010_detach_client), | |
652 | }; | |
653 | ||
654 | /*-------------------------------------------------------------------------*/ | |
655 | ||
656 | /* Draw from VBUS: | |
657 | * 0 mA -- DON'T DRAW (might supply power instead) | |
658 | * 100 mA -- usb unit load (slowest charge rate) | |
659 | * 500 mA -- usb high power (fast battery charge) | |
660 | */ | |
661 | int tps65010_set_vbus_draw(unsigned mA) | |
662 | { | |
663 | unsigned long flags; | |
664 | ||
665 | if (!the_tps) | |
666 | return -ENODEV; | |
667 | ||
668 | /* assumes non-SMP */ | |
669 | local_irq_save(flags); | |
670 | if (mA >= 500) | |
671 | mA = 500; | |
672 | else if (mA >= 100) | |
673 | mA = 100; | |
674 | else | |
675 | mA = 0; | |
676 | the_tps->vbus = mA; | |
677 | if ((the_tps->chgstatus & TPS_CHG_USB) | |
678 | && test_and_set_bit( | |
679 | FLAG_VBUS_CHANGED, &the_tps->flags)) { | |
680 | /* gadget drivers call this in_irq() */ | |
681 | (void) schedule_work(&the_tps->work); | |
682 | } | |
683 | local_irq_restore(flags); | |
684 | ||
685 | return 0; | |
686 | } | |
687 | EXPORT_SYMBOL(tps65010_set_vbus_draw); | |
688 | ||
689 | /*-------------------------------------------------------------------------*/ | |
690 | /* tps65010_set_gpio_out_value parameter: | |
691 | * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 | |
692 | * value: LOW or HIGH | |
693 | */ | |
694 | int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) | |
695 | { | |
696 | int status; | |
697 | unsigned defgpio; | |
698 | ||
699 | if (!the_tps) | |
700 | return -ENODEV; | |
701 | if ((gpio < GPIO1) || (gpio > GPIO4)) | |
702 | return -EINVAL; | |
703 | ||
704 | down(&the_tps->lock); | |
705 | ||
706 | defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO); | |
707 | ||
708 | /* Configure GPIO for output */ | |
709 | defgpio |= 1 << (gpio + 3); | |
710 | ||
711 | /* Writing 1 forces a logic 0 on that GPIO and vice versa */ | |
712 | switch (value) { | |
713 | case LOW: | |
714 | defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ | |
715 | break; | |
716 | /* case HIGH: */ | |
717 | default: | |
718 | defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ | |
719 | break; | |
720 | } | |
721 | ||
722 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
723 | TPS_DEFGPIO, defgpio); | |
724 | ||
725 | pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, | |
726 | gpio, value ? "high" : "low", | |
727 | i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO)); | |
728 | ||
729 | up(&the_tps->lock); | |
730 | return status; | |
731 | } | |
732 | EXPORT_SYMBOL(tps65010_set_gpio_out_value); | |
733 | ||
734 | /*-------------------------------------------------------------------------*/ | |
735 | /* tps65010_set_led parameter: | |
736 | * led: LED1 or LED2 | |
737 | * mode: ON, OFF or BLINK | |
738 | */ | |
739 | int tps65010_set_led(unsigned led, unsigned mode) | |
740 | { | |
741 | int status; | |
742 | unsigned led_on, led_per, offs; | |
743 | ||
744 | if (!the_tps) | |
745 | return -ENODEV; | |
746 | ||
747 | if(led == LED1) | |
748 | offs = 0; | |
749 | else { | |
750 | offs = 2; | |
751 | led = LED2; | |
752 | } | |
753 | ||
754 | down(&the_tps->lock); | |
755 | ||
756 | dev_dbg (&the_tps->client.dev, "led%i_on 0x%02x\n", led, | |
757 | i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs)); | |
758 | ||
759 | dev_dbg (&the_tps->client.dev, "led%i_per 0x%02x\n", led, | |
760 | i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_PER + offs)); | |
761 | ||
762 | switch (mode) { | |
763 | case OFF: | |
764 | led_on = 1 << 7; | |
765 | led_per = 0 << 7; | |
766 | break; | |
767 | case ON: | |
768 | led_on = 1 << 7; | |
769 | led_per = 1 << 7; | |
770 | break; | |
771 | case BLINK: | |
772 | led_on = 0x30 | (0 << 7); | |
773 | led_per = 0x08 | (1 << 7); | |
774 | break; | |
775 | default: | |
776 | printk(KERN_ERR "%s: Wrong mode parameter for tps65010_set_led()\n", | |
777 | DRIVER_NAME); | |
778 | up(&the_tps->lock); | |
779 | return -EINVAL; | |
780 | } | |
781 | ||
782 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
783 | TPS_LED1_ON + offs, led_on); | |
784 | ||
785 | if (status != 0) { | |
786 | printk(KERN_ERR "%s: Failed to write led%i_on register\n", | |
787 | DRIVER_NAME, led); | |
788 | up(&the_tps->lock); | |
789 | return status; | |
790 | } | |
791 | ||
792 | dev_dbg (&the_tps->client.dev, "led%i_on 0x%02x\n", led, | |
793 | i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs)); | |
794 | ||
795 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
796 | TPS_LED1_PER + offs, led_per); | |
797 | ||
798 | if (status != 0) { | |
799 | printk(KERN_ERR "%s: Failed to write led%i_per register\n", | |
800 | DRIVER_NAME, led); | |
801 | up(&the_tps->lock); | |
802 | return status; | |
803 | } | |
804 | ||
805 | dev_dbg (&the_tps->client.dev, "led%i_per 0x%02x\n", led, | |
806 | i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_PER + offs)); | |
807 | ||
808 | up(&the_tps->lock); | |
809 | ||
810 | return status; | |
811 | } | |
812 | EXPORT_SYMBOL(tps65010_set_led); | |
813 | ||
814 | /*-------------------------------------------------------------------------*/ | |
815 | /* tps65010_set_vib parameter: | |
816 | * value: ON or OFF | |
817 | */ | |
818 | int tps65010_set_vib(unsigned value) | |
819 | { | |
820 | int status; | |
821 | unsigned vdcdc2; | |
822 | ||
823 | if (!the_tps) | |
824 | return -ENODEV; | |
825 | ||
826 | down(&the_tps->lock); | |
827 | ||
828 | vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2); | |
829 | vdcdc2 &= ~(1 << 1); | |
830 | if (value) | |
831 | vdcdc2 |= (1 << 1); | |
832 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
833 | TPS_VDCDC2, vdcdc2); | |
834 | ||
835 | pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); | |
836 | ||
837 | up(&the_tps->lock); | |
838 | return status; | |
839 | } | |
840 | EXPORT_SYMBOL(tps65010_set_vib); | |
841 | ||
842 | /*-------------------------------------------------------------------------*/ | |
843 | /* tps65010_set_low_pwr parameter: | |
844 | * mode: ON or OFF | |
845 | */ | |
846 | int tps65010_set_low_pwr(unsigned mode) | |
847 | { | |
848 | int status; | |
849 | unsigned vdcdc1; | |
850 | ||
851 | if (!the_tps) | |
852 | return -ENODEV; | |
853 | ||
854 | down(&the_tps->lock); | |
855 | ||
856 | pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, | |
857 | mode ? "enable" : "disable", | |
858 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
859 | ||
860 | vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1); | |
861 | ||
862 | switch (mode) { | |
863 | case OFF: | |
864 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
865 | break; | |
866 | /* case ON: */ | |
867 | default: | |
868 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
869 | break; | |
870 | } | |
871 | ||
872 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
873 | TPS_VDCDC1, vdcdc1); | |
874 | ||
875 | if (status != 0) | |
876 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
877 | DRIVER_NAME); | |
878 | else | |
879 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
880 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
881 | ||
882 | up(&the_tps->lock); | |
883 | ||
884 | return status; | |
885 | } | |
886 | EXPORT_SYMBOL(tps65010_set_low_pwr); | |
887 | ||
888 | /*-------------------------------------------------------------------------*/ | |
889 | /* tps65010_config_vregs1 parameter: | |
890 | * value to be written to VREGS1 register | |
891 | * Note: The complete register is written, set all bits you need | |
892 | */ | |
893 | int tps65010_config_vregs1(unsigned value) | |
894 | { | |
895 | int status; | |
896 | ||
897 | if (!the_tps) | |
898 | return -ENODEV; | |
899 | ||
900 | down(&the_tps->lock); | |
901 | ||
902 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
903 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); | |
904 | ||
905 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
906 | TPS_VREGS1, value); | |
907 | ||
908 | if (status != 0) | |
909 | printk(KERN_ERR "%s: Failed to write vregs1 register\n", | |
910 | DRIVER_NAME); | |
911 | else | |
912 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
913 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); | |
914 | ||
915 | up(&the_tps->lock); | |
916 | ||
917 | return status; | |
918 | } | |
919 | EXPORT_SYMBOL(tps65010_config_vregs1); | |
920 | ||
921 | /*-------------------------------------------------------------------------*/ | |
922 | /* tps65013_set_low_pwr parameter: | |
923 | * mode: ON or OFF | |
924 | */ | |
925 | ||
926 | /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not | |
927 | required if power supply is through a battery */ | |
928 | ||
929 | int tps65013_set_low_pwr(unsigned mode) | |
930 | { | |
931 | int status; | |
932 | unsigned vdcdc1, chgconfig; | |
933 | ||
934 | if (!the_tps || the_tps->por) | |
935 | return -ENODEV; | |
936 | ||
937 | down(&the_tps->lock); | |
938 | ||
939 | pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", | |
940 | DRIVER_NAME, | |
941 | mode ? "enable" : "disable", | |
942 | i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG), | |
943 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
944 | ||
945 | chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG); | |
946 | vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1); | |
947 | ||
948 | switch (mode) { | |
949 | case OFF: | |
950 | chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ | |
951 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
952 | break; | |
953 | /* case ON: */ | |
954 | default: | |
955 | chgconfig |= TPS65013_AUA; /* enable AUA bit */ | |
956 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
957 | break; | |
958 | } | |
959 | ||
960 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
961 | TPS_CHGCONFIG, chgconfig); | |
962 | if (status != 0) { | |
963 | printk(KERN_ERR "%s: Failed to write chconfig register\n", | |
964 | DRIVER_NAME); | |
965 | up(&the_tps->lock); | |
966 | return status; | |
967 | } | |
968 | ||
969 | chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG); | |
970 | the_tps->chgconf = chgconfig; | |
971 | show_chgconfig(0, "chgconf", chgconfig); | |
972 | ||
973 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
974 | TPS_VDCDC1, vdcdc1); | |
975 | ||
976 | if (status != 0) | |
977 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
978 | DRIVER_NAME); | |
979 | else | |
980 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
981 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
982 | ||
983 | up(&the_tps->lock); | |
984 | ||
985 | return status; | |
986 | } | |
987 | EXPORT_SYMBOL(tps65013_set_low_pwr); | |
988 | ||
989 | /*-------------------------------------------------------------------------*/ | |
990 | ||
991 | static int __init tps_init(void) | |
992 | { | |
993 | u32 tries = 3; | |
994 | int status = -ENODEV; | |
995 | ||
996 | printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); | |
997 | ||
998 | /* some boards have startup glitches */ | |
999 | while (tries--) { | |
1000 | status = i2c_add_driver(&tps65010_driver); | |
1001 | if (the_tps) | |
1002 | break; | |
1003 | i2c_del_driver(&tps65010_driver); | |
1004 | if (!tries) { | |
1005 | printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); | |
1006 | return -ENODEV; | |
1007 | } | |
1008 | pr_debug("%s: re-probe ...\n", DRIVER_NAME); | |
1009 | msleep(10); | |
1010 | } | |
1011 | ||
1012 | #if defined(CONFIG_ARM) | |
1013 | if (machine_is_omap_osk()) { | |
1014 | ||
1015 | // FIXME: More should be placed in the initialization code | |
1016 | // of the submodules (DSP, ethernet, power management, | |
1017 | // board-osk.c). Careful: I2C is initialized "late". | |
1018 | ||
1019 | /* Let LED1 (D9) blink */ | |
1020 | tps65010_set_led(LED1, BLINK); | |
1021 | ||
1022 | /* Disable LED 2 (D2) */ | |
1023 | tps65010_set_led(LED2, OFF); | |
1024 | ||
1025 | /* Set GPIO 1 HIGH to disable VBUS power supply; | |
1026 | * OHCI driver powers it up/down as needed. | |
1027 | */ | |
1028 | tps65010_set_gpio_out_value(GPIO1, HIGH); | |
1029 | ||
1030 | /* Set GPIO 2 low to turn on LED D3 */ | |
1031 | tps65010_set_gpio_out_value(GPIO2, HIGH); | |
1032 | ||
1033 | /* Set GPIO 3 low to take ethernet out of reset */ | |
1034 | tps65010_set_gpio_out_value(GPIO3, LOW); | |
1035 | ||
1036 | /* gpio4 for VDD_DSP */ | |
1037 | ||
1038 | /* Enable LOW_PWR */ | |
1039 | tps65010_set_low_pwr(ON); | |
1040 | ||
1041 | /* Switch VLDO2 to 3.0V for AIC23 */ | |
1042 | tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE); | |
1043 | ||
1044 | } else if (machine_is_omap_h2()) { | |
1045 | /* gpio3 for SD, gpio4 for VDD_DSP */ | |
1046 | ||
1047 | /* Enable LOW_PWR */ | |
1048 | tps65010_set_low_pwr(ON); | |
1049 | } else if (machine_is_omap_h3()) { | |
1050 | /* gpio4 for SD, gpio3 for VDD_DSP */ | |
1051 | #ifdef CONFIG_PM | |
1052 | /* Enable LOW_PWR */ | |
1053 | tps65013_set_low_pwr(ON); | |
1054 | #endif | |
1055 | } | |
1056 | #endif | |
1057 | ||
1058 | return status; | |
1059 | } | |
1060 | /* NOTE: this MUST be initialized before the other parts of the system | |
1061 | * that rely on it ... but after the i2c bus on which this relies. | |
1062 | * That is, much earlier than on PC-type systems, which don't often use | |
1063 | * I2C as a core system bus. | |
1064 | */ | |
1065 | subsys_initcall(tps_init); | |
1066 | ||
1067 | static void __exit tps_exit(void) | |
1068 | { | |
1069 | i2c_del_driver(&tps65010_driver); | |
1070 | } | |
1071 | module_exit(tps_exit); | |
1072 |