1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * tps65010 - driver for tps6501x power management chips |
4 | * |
5 | * Copyright (C) 2004 Texas Instruments |
6 | * Copyright (C) 2004-2005 David Brownell |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/i2c.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/workqueue.h> |
17 | #include <linux/debugfs.h> |
18 | #include <linux/seq_file.h> |
19 | #include <linux/mutex.h> |
20 | #include <linux/platform_device.h> |
21 | |
22 | #include <linux/mfd/tps65010.h> |
23 | |
24 | #include <linux/gpio/driver.h> |
25 | |
26 | |
27 | /*-------------------------------------------------------------------------*/ |
28 | |
29 | #define DRIVER_VERSION "2 May 2005" |
30 | #define DRIVER_NAME (tps65010_driver.driver.name) |
31 | |
32 | MODULE_DESCRIPTION("TPS6501x Power Management Driver" ); |
33 | MODULE_LICENSE("GPL" ); |
34 | |
35 | static struct i2c_driver tps65010_driver; |
36 | |
37 | /*-------------------------------------------------------------------------*/ |
38 | |
39 | /* This driver handles a family of multipurpose chips, which incorporate |
40 | * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, |
41 | * and other features often needed in portable devices like cell phones |
42 | * or digital cameras. |
43 | * |
44 | * The tps65011 and tps65013 have different voltage settings compared |
45 | * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. |
46 | * All except tps65010 have "wait" mode, possibly defaulted so that |
47 | * battery-insert != device-on. |
48 | * |
49 | * We could distinguish between some models by checking VDCDC1.UVLO or |
50 | * other registers, unless they've been changed already after powerup |
51 | * as part of board setup by a bootloader. |
52 | */ |
53 | enum tps_model { |
54 | TPS65010, |
55 | TPS65011, |
56 | TPS65012, |
57 | TPS65013, |
58 | }; |
59 | |
60 | struct tps65010 { |
61 | struct i2c_client *client; |
62 | struct mutex lock; |
63 | struct delayed_work work; |
64 | struct dentry *file; |
65 | unsigned charging:1; |
66 | unsigned por:1; |
67 | unsigned model:8; |
68 | u16 vbus; |
69 | unsigned long flags; |
70 | #define FLAG_VBUS_CHANGED 0 |
71 | #define FLAG_IRQ_ENABLE 1 |
72 | |
73 | /* copies of last register state */ |
74 | u8 chgstatus, regstatus, chgconf; |
75 | u8 nmask1, nmask2; |
76 | |
77 | u8 outmask; |
78 | struct gpio_chip chip; |
79 | struct platform_device *leds; |
80 | }; |
81 | |
82 | #define POWER_POLL_DELAY msecs_to_jiffies(5000) |
83 | |
84 | /*-------------------------------------------------------------------------*/ |
85 | |
86 | #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) |
87 | |
88 | static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) |
89 | { |
90 | snprintf(buf, size: len, fmt: "%02x%s%s%s%s%s%s%s%s\n" , |
91 | chgstatus, |
92 | (chgstatus & TPS_CHG_USB) ? " USB" : "" , |
93 | (chgstatus & TPS_CHG_AC) ? " AC" : "" , |
94 | (chgstatus & TPS_CHG_THERM) ? " therm" : "" , |
95 | (chgstatus & TPS_CHG_TERM) ? " done" : |
96 | ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
97 | ? " (charging)" : "" ), |
98 | (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "" , |
99 | (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "" , |
100 | (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "" , |
101 | (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "" ); |
102 | } |
103 | |
104 | static void dbg_regstat(char *buf, size_t len, u8 regstatus) |
105 | { |
106 | snprintf(buf, size: len, fmt: "%02x %s%s%s%s%s%s%s%s\n" , |
107 | regstatus, |
108 | (regstatus & TPS_REG_ONOFF) ? "off" : "(on)" , |
109 | (regstatus & TPS_REG_COVER) ? " uncover" : "" , |
110 | (regstatus & TPS_REG_UVLO) ? " UVLO" : "" , |
111 | (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "" , |
112 | (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "" , |
113 | (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "" , |
114 | (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "" , |
115 | (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "" ); |
116 | } |
117 | |
118 | static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) |
119 | { |
120 | const char *hibit; |
121 | |
122 | if (por) |
123 | hibit = (chgconfig & TPS_CHARGE_POR) |
124 | ? "POR=69ms" : "POR=1sec" ; |
125 | else |
126 | hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "" ; |
127 | |
128 | snprintf(buf, size: len, fmt: "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n" , |
129 | chgconfig, hibit, |
130 | (chgconfig & TPS_CHARGE_RESET) ? " reset" : "" , |
131 | (chgconfig & TPS_CHARGE_FAST) ? " fast" : "" , |
132 | ({int p; switch ((chgconfig >> 3) & 3) { |
133 | case 3: p = 100; break; |
134 | case 2: p = 75; break; |
135 | case 1: p = 50; break; |
136 | default: p = 25; break; |
137 | }; p; }), |
138 | (chgconfig & TPS_VBUS_CHARGING) |
139 | ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) |
140 | : 0, |
141 | (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No" ); |
142 | } |
143 | |
144 | #endif |
145 | |
146 | #ifdef DEBUG |
147 | |
148 | static void show_chgstatus(const char *label, u8 chgstatus) |
149 | { |
150 | char buf [100]; |
151 | |
152 | dbg_chgstat(buf, sizeof buf, chgstatus); |
153 | pr_debug("%s: %s %s" , DRIVER_NAME, label, buf); |
154 | } |
155 | |
156 | static void show_regstatus(const char *label, u8 regstatus) |
157 | { |
158 | char buf [100]; |
159 | |
160 | dbg_regstat(buf, sizeof buf, regstatus); |
161 | pr_debug("%s: %s %s" , DRIVER_NAME, label, buf); |
162 | } |
163 | |
164 | static void show_chgconfig(int por, const char *label, u8 chgconfig) |
165 | { |
166 | char buf [100]; |
167 | |
168 | dbg_chgconf(por, buf, sizeof buf, chgconfig); |
169 | pr_debug("%s: %s %s" , DRIVER_NAME, label, buf); |
170 | } |
171 | |
172 | #else |
173 | |
174 | static inline void show_chgstatus(const char *label, u8 chgstatus) { } |
175 | static inline void show_regstatus(const char *label, u8 chgstatus) { } |
176 | static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } |
177 | |
178 | #endif |
179 | |
180 | #ifdef CONFIG_DEBUG_FS |
181 | |
182 | static int dbg_show(struct seq_file *s, void *_) |
183 | { |
184 | struct tps65010 *tps = s->private; |
185 | u8 value, v2; |
186 | unsigned i; |
187 | char buf[100]; |
188 | const char *chip; |
189 | |
190 | switch (tps->model) { |
191 | case TPS65010: chip = "tps65010" ; break; |
192 | case TPS65011: chip = "tps65011" ; break; |
193 | case TPS65012: chip = "tps65012" ; break; |
194 | case TPS65013: chip = "tps65013" ; break; |
195 | default: chip = NULL; break; |
196 | } |
197 | seq_printf(m: s, fmt: "driver %s\nversion %s\nchip %s\n\n" , |
198 | DRIVER_NAME, DRIVER_VERSION, chip); |
199 | |
200 | mutex_lock(&tps->lock); |
201 | |
202 | /* FIXME how can we tell whether a battery is present? |
203 | * likely involves a charge gauging chip (like BQ26501). |
204 | */ |
205 | |
206 | seq_printf(m: s, fmt: "%scharging\n\n" , tps->charging ? "" : "(not) " ); |
207 | |
208 | |
209 | /* registers for monitoring battery charging and status; note |
210 | * that reading chgstat and regstat may ack IRQs... |
211 | */ |
212 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_CHGCONFIG); |
213 | dbg_chgconf(por: tps->por, buf, len: sizeof buf, chgconfig: value); |
214 | seq_printf(m: s, fmt: "chgconfig %s" , buf); |
215 | |
216 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_CHGSTATUS); |
217 | dbg_chgstat(buf, len: sizeof buf, chgstatus: value); |
218 | seq_printf(m: s, fmt: "chgstat %s" , buf); |
219 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_MASK1); |
220 | dbg_chgstat(buf, len: sizeof buf, chgstatus: value); |
221 | seq_printf(m: s, fmt: "mask1 %s" , buf); |
222 | /* ignore ackint1 */ |
223 | |
224 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_REGSTATUS); |
225 | dbg_regstat(buf, len: sizeof buf, regstatus: value); |
226 | seq_printf(m: s, fmt: "regstat %s" , buf); |
227 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_MASK2); |
228 | dbg_regstat(buf, len: sizeof buf, regstatus: value); |
229 | seq_printf(m: s, fmt: "mask2 %s\n" , buf); |
230 | /* ignore ackint2 */ |
231 | |
232 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &tps->work, |
233 | POWER_POLL_DELAY); |
234 | |
235 | /* VMAIN voltage, enable lowpower, etc */ |
236 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_VDCDC1); |
237 | seq_printf(m: s, fmt: "vdcdc1 %02x\n" , value); |
238 | |
239 | /* VCORE voltage, vibrator on/off */ |
240 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_VDCDC2); |
241 | seq_printf(m: s, fmt: "vdcdc2 %02x\n" , value); |
242 | |
243 | /* both LD0s, and their lowpower behavior */ |
244 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_VREGS1); |
245 | seq_printf(m: s, fmt: "vregs1 %02x\n\n" , value); |
246 | |
247 | |
248 | /* LEDs and GPIOs */ |
249 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_LED1_ON); |
250 | v2 = i2c_smbus_read_byte_data(client: tps->client, TPS_LED1_PER); |
251 | seq_printf(m: s, fmt: "led1 %s, on=%02x, per=%02x, %d/%d msec\n" , |
252 | (value & 0x80) |
253 | ? ((v2 & 0x80) ? "on" : "off" ) |
254 | : ((v2 & 0x80) ? "blink" : "(nPG)" ), |
255 | value, v2, |
256 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); |
257 | |
258 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_LED2_ON); |
259 | v2 = i2c_smbus_read_byte_data(client: tps->client, TPS_LED2_PER); |
260 | seq_printf(m: s, fmt: "led2 %s, on=%02x, per=%02x, %d/%d msec\n" , |
261 | (value & 0x80) |
262 | ? ((v2 & 0x80) ? "on" : "off" ) |
263 | : ((v2 & 0x80) ? "blink" : "off" ), |
264 | value, v2, |
265 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); |
266 | |
267 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_DEFGPIO); |
268 | v2 = i2c_smbus_read_byte_data(client: tps->client, TPS_MASK3); |
269 | seq_printf(m: s, fmt: "defgpio %02x mask3 %02x\n" , value, v2); |
270 | |
271 | for (i = 0; i < 4; i++) { |
272 | if (value & (1 << (4 + i))) |
273 | seq_printf(m: s, fmt: " gpio%d-out %s\n" , i + 1, |
274 | (value & (1 << i)) ? "low" : "hi " ); |
275 | else |
276 | seq_printf(m: s, fmt: " gpio%d-in %s %s %s\n" , i + 1, |
277 | (value & (1 << i)) ? "hi " : "low" , |
278 | (v2 & (1 << i)) ? "no-irq" : "irq" , |
279 | (v2 & (1 << (4 + i))) ? "rising" : "falling" ); |
280 | } |
281 | |
282 | mutex_unlock(lock: &tps->lock); |
283 | return 0; |
284 | } |
285 | |
286 | static int dbg_tps_open(struct inode *inode, struct file *file) |
287 | { |
288 | return single_open(file, dbg_show, inode->i_private); |
289 | } |
290 | |
291 | static const struct file_operations debug_fops = { |
292 | .open = dbg_tps_open, |
293 | .read = seq_read, |
294 | .llseek = seq_lseek, |
295 | .release = single_release, |
296 | }; |
297 | |
298 | #define DEBUG_FOPS &debug_fops |
299 | |
300 | #else |
301 | #define DEBUG_FOPS NULL |
302 | #endif |
303 | |
304 | /*-------------------------------------------------------------------------*/ |
305 | |
306 | /* handle IRQS in a task context, so we can use I2C calls */ |
307 | static void tps65010_interrupt(struct tps65010 *tps) |
308 | { |
309 | u8 tmp = 0, mask, poll; |
310 | |
311 | /* IRQs won't trigger for certain events, but we can get |
312 | * others by polling (normally, with external power applied). |
313 | */ |
314 | poll = 0; |
315 | |
316 | /* regstatus irqs */ |
317 | if (tps->nmask2) { |
318 | tmp = i2c_smbus_read_byte_data(client: tps->client, TPS_REGSTATUS); |
319 | mask = tmp ^ tps->regstatus; |
320 | tps->regstatus = tmp; |
321 | mask &= tps->nmask2; |
322 | } else |
323 | mask = 0; |
324 | if (mask) { |
325 | tps->regstatus = tmp; |
326 | /* may need to shut something down ... */ |
327 | |
328 | /* "off" usually means deep sleep */ |
329 | if (tmp & TPS_REG_ONOFF) { |
330 | pr_info("%s: power off button\n" , DRIVER_NAME); |
331 | #if 0 |
332 | /* REVISIT: this might need its own workqueue |
333 | * plus tweaks including deadlock avoidance ... |
334 | * also needs to get error handling and probably |
335 | * an #ifdef CONFIG_HIBERNATION |
336 | */ |
337 | hibernate(); |
338 | #endif |
339 | poll = 1; |
340 | } |
341 | } |
342 | |
343 | /* chgstatus irqs */ |
344 | if (tps->nmask1) { |
345 | tmp = i2c_smbus_read_byte_data(client: tps->client, TPS_CHGSTATUS); |
346 | mask = tmp ^ tps->chgstatus; |
347 | tps->chgstatus = tmp; |
348 | mask &= tps->nmask1; |
349 | } else |
350 | mask = 0; |
351 | if (mask) { |
352 | unsigned charging = 0; |
353 | |
354 | show_chgstatus(label: "chg/irq" , chgstatus: tmp); |
355 | if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) |
356 | show_chgconfig(por: tps->por, label: "conf" , chgconfig: tps->chgconf); |
357 | |
358 | /* Unless it was turned off or disabled, we charge any |
359 | * battery whenever there's power available for it |
360 | * and the charger hasn't been disabled. |
361 | */ |
362 | if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) |
363 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
364 | && (tps->chgconf & TPS_CHARGE_ENABLE) |
365 | ) { |
366 | if (tps->chgstatus & TPS_CHG_USB) { |
367 | /* VBUS options are readonly until reconnect */ |
368 | if (mask & TPS_CHG_USB) |
369 | set_bit(FLAG_VBUS_CHANGED, addr: &tps->flags); |
370 | charging = 1; |
371 | } else if (tps->chgstatus & TPS_CHG_AC) |
372 | charging = 1; |
373 | } |
374 | if (charging != tps->charging) { |
375 | tps->charging = charging; |
376 | pr_info("%s: battery %scharging\n" , |
377 | DRIVER_NAME, charging ? "" : |
378 | ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
379 | ? "NOT " : "dis" )); |
380 | } |
381 | } |
382 | |
383 | /* always poll to detect (a) power removal, without tps65013 |
384 | * NO_CHG IRQ; or (b) restart of charging after stop. |
385 | */ |
386 | if ((tps->model != TPS65013 || !tps->charging) |
387 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) |
388 | poll = 1; |
389 | if (poll) |
390 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &tps->work, |
391 | POWER_POLL_DELAY); |
392 | |
393 | /* also potentially gpio-in rise or fall */ |
394 | } |
395 | |
396 | /* handle IRQs and polling using keventd for now */ |
397 | static void tps65010_work(struct work_struct *work) |
398 | { |
399 | struct tps65010 *tps; |
400 | |
401 | tps = container_of(to_delayed_work(work), struct tps65010, work); |
402 | mutex_lock(&tps->lock); |
403 | |
404 | tps65010_interrupt(tps); |
405 | |
406 | if (test_and_clear_bit(FLAG_VBUS_CHANGED, addr: &tps->flags)) { |
407 | u8 chgconfig, tmp; |
408 | |
409 | chgconfig = i2c_smbus_read_byte_data(client: tps->client, |
410 | TPS_CHGCONFIG); |
411 | chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); |
412 | if (tps->vbus == 500) |
413 | chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; |
414 | else if (tps->vbus >= 100) |
415 | chgconfig |= TPS_VBUS_CHARGING; |
416 | |
417 | i2c_smbus_write_byte_data(client: tps->client, |
418 | TPS_CHGCONFIG, value: chgconfig); |
419 | |
420 | /* vbus update fails unless VBUS is connected! */ |
421 | tmp = i2c_smbus_read_byte_data(client: tps->client, TPS_CHGCONFIG); |
422 | tps->chgconf = tmp; |
423 | show_chgconfig(por: tps->por, label: "update vbus" , chgconfig: tmp); |
424 | } |
425 | |
426 | if (test_and_clear_bit(FLAG_IRQ_ENABLE, addr: &tps->flags)) |
427 | enable_irq(irq: tps->client->irq); |
428 | |
429 | mutex_unlock(lock: &tps->lock); |
430 | } |
431 | |
432 | static irqreturn_t tps65010_irq(int irq, void *_tps) |
433 | { |
434 | struct tps65010 *tps = _tps; |
435 | |
436 | disable_irq_nosync(irq); |
437 | set_bit(FLAG_IRQ_ENABLE, addr: &tps->flags); |
438 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &tps->work, delay: 0); |
439 | return IRQ_HANDLED; |
440 | } |
441 | |
442 | /*-------------------------------------------------------------------------*/ |
443 | |
444 | /* offsets 0..3 == GPIO1..GPIO4 |
445 | * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) |
446 | * offset 6 == vibrator motor driver |
447 | */ |
448 | static void |
449 | tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
450 | { |
451 | if (offset < 4) |
452 | tps65010_set_gpio_out_value(gpio: offset + 1, value); |
453 | else if (offset < 6) |
454 | tps65010_set_led(led: offset - 3, mode: value ? ON : OFF); |
455 | else |
456 | tps65010_set_vib(value); |
457 | } |
458 | |
459 | static int |
460 | tps65010_output(struct gpio_chip *chip, unsigned offset, int value) |
461 | { |
462 | /* GPIOs may be input-only */ |
463 | if (offset < 4) { |
464 | struct tps65010 *tps; |
465 | |
466 | tps = gpiochip_get_data(gc: chip); |
467 | if (!(tps->outmask & (1 << offset))) |
468 | return -EINVAL; |
469 | tps65010_set_gpio_out_value(gpio: offset + 1, value); |
470 | } else if (offset < 6) |
471 | tps65010_set_led(led: offset - 3, mode: value ? ON : OFF); |
472 | else |
473 | tps65010_set_vib(value); |
474 | |
475 | return 0; |
476 | } |
477 | |
478 | static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) |
479 | { |
480 | int value; |
481 | struct tps65010 *tps; |
482 | |
483 | tps = gpiochip_get_data(gc: chip); |
484 | |
485 | if (offset < 4) { |
486 | value = i2c_smbus_read_byte_data(client: tps->client, TPS_DEFGPIO); |
487 | if (value < 0) |
488 | return value; |
489 | if (value & (1 << (offset + 4))) /* output */ |
490 | return !(value & (1 << offset)); |
491 | else /* input */ |
492 | return !!(value & (1 << offset)); |
493 | } |
494 | |
495 | /* REVISIT we *could* report LED1/nPG and LED2 state ... */ |
496 | return 0; |
497 | } |
498 | |
499 | |
500 | /*-------------------------------------------------------------------------*/ |
501 | |
502 | static struct tps65010 *the_tps; |
503 | |
504 | static void tps65010_remove(struct i2c_client *client) |
505 | { |
506 | struct tps65010 *tps = i2c_get_clientdata(client); |
507 | struct tps65010_board *board = dev_get_platdata(dev: &client->dev); |
508 | |
509 | if (board && board->teardown) |
510 | board->teardown(client, &tps->chip); |
511 | if (client->irq > 0) |
512 | free_irq(client->irq, tps); |
513 | cancel_delayed_work_sync(dwork: &tps->work); |
514 | debugfs_remove(dentry: tps->file); |
515 | the_tps = NULL; |
516 | } |
517 | |
518 | static int tps65010_probe(struct i2c_client *client) |
519 | { |
520 | const struct i2c_device_id *id = i2c_client_get_device_id(client); |
521 | struct tps65010 *tps; |
522 | int status; |
523 | struct tps65010_board *board = dev_get_platdata(dev: &client->dev); |
524 | |
525 | if (the_tps) { |
526 | dev_dbg(&client->dev, "only one tps6501x chip allowed\n" ); |
527 | return -ENODEV; |
528 | } |
529 | |
530 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
531 | return -EINVAL; |
532 | |
533 | tps = devm_kzalloc(dev: &client->dev, size: sizeof(*tps), GFP_KERNEL); |
534 | if (!tps) |
535 | return -ENOMEM; |
536 | |
537 | mutex_init(&tps->lock); |
538 | INIT_DELAYED_WORK(&tps->work, tps65010_work); |
539 | tps->client = client; |
540 | tps->model = id->driver_data; |
541 | |
542 | /* the IRQ is active low, but many gpio lines can't support that |
543 | * so this driver uses falling-edge triggers instead. |
544 | */ |
545 | if (client->irq > 0) { |
546 | status = request_irq(irq: client->irq, handler: tps65010_irq, |
547 | IRQF_TRIGGER_FALLING, DRIVER_NAME, dev: tps); |
548 | if (status < 0) { |
549 | dev_dbg(&client->dev, "can't get IRQ %d, err %d\n" , |
550 | client->irq, status); |
551 | return status; |
552 | } |
553 | /* annoying race here, ideally we'd have an option |
554 | * to claim the irq now and enable it later. |
555 | * FIXME genirq IRQF_NOAUTOEN now solves that ... |
556 | */ |
557 | disable_irq(irq: client->irq); |
558 | set_bit(FLAG_IRQ_ENABLE, addr: &tps->flags); |
559 | } else |
560 | dev_warn(&client->dev, "IRQ not configured!\n" ); |
561 | |
562 | |
563 | switch (tps->model) { |
564 | case TPS65010: |
565 | case TPS65012: |
566 | tps->por = 1; |
567 | break; |
568 | /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ |
569 | } |
570 | tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); |
571 | show_chgconfig(por: tps->por, label: "conf/init" , chgconfig: tps->chgconf); |
572 | |
573 | show_chgstatus(label: "chg/init" , |
574 | chgstatus: i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); |
575 | show_regstatus(label: "reg/init" , |
576 | chgstatus: i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); |
577 | |
578 | pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n" , DRIVER_NAME, |
579 | i2c_smbus_read_byte_data(client, TPS_VDCDC1), |
580 | i2c_smbus_read_byte_data(client, TPS_VDCDC2), |
581 | i2c_smbus_read_byte_data(client, TPS_VREGS1)); |
582 | pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n" , DRIVER_NAME, |
583 | i2c_smbus_read_byte_data(client, TPS_DEFGPIO), |
584 | i2c_smbus_read_byte_data(client, TPS_MASK3)); |
585 | |
586 | i2c_set_clientdata(client, data: tps); |
587 | the_tps = tps; |
588 | |
589 | #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) |
590 | /* USB hosts can't draw VBUS. OTG devices could, later |
591 | * when OTG infrastructure enables it. USB peripherals |
592 | * could be relying on VBUS while booting, though. |
593 | */ |
594 | tps->vbus = 100; |
595 | #endif |
596 | |
597 | /* unmask the "interesting" irqs, then poll once to |
598 | * kickstart monitoring, initialize shadowed status |
599 | * registers, and maybe disable VBUS draw. |
600 | */ |
601 | tps->nmask1 = ~0; |
602 | (void) i2c_smbus_write_byte_data(client, TPS_MASK1, value: ~tps->nmask1); |
603 | |
604 | tps->nmask2 = TPS_REG_ONOFF; |
605 | if (tps->model == TPS65013) |
606 | tps->nmask2 |= TPS_REG_NO_CHG; |
607 | (void) i2c_smbus_write_byte_data(client, TPS_MASK2, value: ~tps->nmask2); |
608 | |
609 | (void) i2c_smbus_write_byte_data(client, TPS_MASK3, value: 0x0f |
610 | | i2c_smbus_read_byte_data(client, TPS_MASK3)); |
611 | |
612 | tps65010_work(work: &tps->work.work); |
613 | |
614 | tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, |
615 | data: tps, DEBUG_FOPS); |
616 | |
617 | /* optionally register GPIOs */ |
618 | if (board) { |
619 | tps->outmask = board->outmask; |
620 | |
621 | tps->chip.label = client->name; |
622 | tps->chip.parent = &client->dev; |
623 | tps->chip.owner = THIS_MODULE; |
624 | |
625 | tps->chip.set = tps65010_gpio_set; |
626 | tps->chip.direction_output = tps65010_output; |
627 | |
628 | /* NOTE: only partial support for inputs; nyet IRQs */ |
629 | tps->chip.get = tps65010_gpio_get; |
630 | |
631 | tps->chip.base = -1; |
632 | tps->chip.ngpio = 7; |
633 | tps->chip.can_sleep = 1; |
634 | |
635 | status = gpiochip_add_data(&tps->chip, tps); |
636 | if (status < 0) |
637 | dev_err(&client->dev, "can't add gpiochip, err %d\n" , |
638 | status); |
639 | else if (board->setup) { |
640 | status = board->setup(client, &tps->chip); |
641 | if (status < 0) { |
642 | dev_dbg(&client->dev, |
643 | "board %s %s err %d\n" , |
644 | "setup" , client->name, status); |
645 | status = 0; |
646 | } |
647 | } |
648 | } |
649 | |
650 | return 0; |
651 | } |
652 | |
653 | static const struct i2c_device_id tps65010_id[] = { |
654 | { "tps65010" , TPS65010 }, |
655 | { "tps65011" , TPS65011 }, |
656 | { "tps65012" , TPS65012 }, |
657 | { "tps65013" , TPS65013 }, |
658 | { "tps65014" , TPS65011 }, /* tps65011 charging at 6.5V max */ |
659 | { } |
660 | }; |
661 | MODULE_DEVICE_TABLE(i2c, tps65010_id); |
662 | |
663 | static struct i2c_driver tps65010_driver = { |
664 | .driver = { |
665 | .name = "tps65010" , |
666 | }, |
667 | .probe = tps65010_probe, |
668 | .remove = tps65010_remove, |
669 | .id_table = tps65010_id, |
670 | }; |
671 | |
672 | /*-------------------------------------------------------------------------*/ |
673 | |
674 | /* Draw from VBUS: |
675 | * 0 mA -- DON'T DRAW (might supply power instead) |
676 | * 100 mA -- usb unit load (slowest charge rate) |
677 | * 500 mA -- usb high power (fast battery charge) |
678 | */ |
679 | int tps65010_set_vbus_draw(unsigned mA) |
680 | { |
681 | unsigned long flags; |
682 | |
683 | if (!the_tps) |
684 | return -ENODEV; |
685 | |
686 | /* assumes non-SMP */ |
687 | local_irq_save(flags); |
688 | if (mA >= 500) |
689 | mA = 500; |
690 | else if (mA >= 100) |
691 | mA = 100; |
692 | else |
693 | mA = 0; |
694 | the_tps->vbus = mA; |
695 | if ((the_tps->chgstatus & TPS_CHG_USB) |
696 | && test_and_set_bit( |
697 | FLAG_VBUS_CHANGED, addr: &the_tps->flags)) { |
698 | /* gadget drivers call this in_irq() */ |
699 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &the_tps->work, |
700 | delay: 0); |
701 | } |
702 | local_irq_restore(flags); |
703 | |
704 | return 0; |
705 | } |
706 | EXPORT_SYMBOL(tps65010_set_vbus_draw); |
707 | |
708 | /*-------------------------------------------------------------------------*/ |
709 | /* tps65010_set_gpio_out_value parameter: |
710 | * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 |
711 | * value: LOW or HIGH |
712 | */ |
713 | int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) |
714 | { |
715 | int status; |
716 | unsigned defgpio; |
717 | |
718 | if (!the_tps) |
719 | return -ENODEV; |
720 | if ((gpio < GPIO1) || (gpio > GPIO4)) |
721 | return -EINVAL; |
722 | |
723 | mutex_lock(&the_tps->lock); |
724 | |
725 | defgpio = i2c_smbus_read_byte_data(client: the_tps->client, TPS_DEFGPIO); |
726 | |
727 | /* Configure GPIO for output */ |
728 | defgpio |= 1 << (gpio + 3); |
729 | |
730 | /* Writing 1 forces a logic 0 on that GPIO and vice versa */ |
731 | switch (value) { |
732 | case LOW: |
733 | defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ |
734 | break; |
735 | /* case HIGH: */ |
736 | default: |
737 | defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ |
738 | break; |
739 | } |
740 | |
741 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
742 | TPS_DEFGPIO, value: defgpio); |
743 | |
744 | pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n" , DRIVER_NAME, |
745 | gpio, value ? "high" : "low" , |
746 | i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); |
747 | |
748 | mutex_unlock(lock: &the_tps->lock); |
749 | return status; |
750 | } |
751 | EXPORT_SYMBOL(tps65010_set_gpio_out_value); |
752 | |
753 | /*-------------------------------------------------------------------------*/ |
754 | /* tps65010_set_led parameter: |
755 | * led: LED1 or LED2 |
756 | * mode: ON, OFF or BLINK |
757 | */ |
758 | int tps65010_set_led(unsigned led, unsigned mode) |
759 | { |
760 | int status; |
761 | unsigned led_on, led_per, offs; |
762 | |
763 | if (!the_tps) |
764 | return -ENODEV; |
765 | |
766 | if (led == LED1) |
767 | offs = 0; |
768 | else { |
769 | offs = 2; |
770 | led = LED2; |
771 | } |
772 | |
773 | mutex_lock(&the_tps->lock); |
774 | |
775 | pr_debug("%s: led%i_on 0x%02x\n" , DRIVER_NAME, led, |
776 | i2c_smbus_read_byte_data(the_tps->client, |
777 | TPS_LED1_ON + offs)); |
778 | |
779 | pr_debug("%s: led%i_per 0x%02x\n" , DRIVER_NAME, led, |
780 | i2c_smbus_read_byte_data(the_tps->client, |
781 | TPS_LED1_PER + offs)); |
782 | |
783 | switch (mode) { |
784 | case OFF: |
785 | led_on = 1 << 7; |
786 | led_per = 0 << 7; |
787 | break; |
788 | case ON: |
789 | led_on = 1 << 7; |
790 | led_per = 1 << 7; |
791 | break; |
792 | case BLINK: |
793 | led_on = 0x30 | (0 << 7); |
794 | led_per = 0x08 | (1 << 7); |
795 | break; |
796 | default: |
797 | printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n" , |
798 | DRIVER_NAME); |
799 | mutex_unlock(lock: &the_tps->lock); |
800 | return -EINVAL; |
801 | } |
802 | |
803 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
804 | TPS_LED1_ON + offs, value: led_on); |
805 | |
806 | if (status != 0) { |
807 | printk(KERN_ERR "%s: Failed to write led%i_on register\n" , |
808 | DRIVER_NAME, led); |
809 | mutex_unlock(lock: &the_tps->lock); |
810 | return status; |
811 | } |
812 | |
813 | pr_debug("%s: led%i_on 0x%02x\n" , DRIVER_NAME, led, |
814 | i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); |
815 | |
816 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
817 | TPS_LED1_PER + offs, value: led_per); |
818 | |
819 | if (status != 0) { |
820 | printk(KERN_ERR "%s: Failed to write led%i_per register\n" , |
821 | DRIVER_NAME, led); |
822 | mutex_unlock(lock: &the_tps->lock); |
823 | return status; |
824 | } |
825 | |
826 | pr_debug("%s: led%i_per 0x%02x\n" , DRIVER_NAME, led, |
827 | i2c_smbus_read_byte_data(the_tps->client, |
828 | TPS_LED1_PER + offs)); |
829 | |
830 | mutex_unlock(lock: &the_tps->lock); |
831 | |
832 | return status; |
833 | } |
834 | EXPORT_SYMBOL(tps65010_set_led); |
835 | |
836 | /*-------------------------------------------------------------------------*/ |
837 | /* tps65010_set_vib parameter: |
838 | * value: ON or OFF |
839 | */ |
840 | int tps65010_set_vib(unsigned value) |
841 | { |
842 | int status; |
843 | unsigned vdcdc2; |
844 | |
845 | if (!the_tps) |
846 | return -ENODEV; |
847 | |
848 | mutex_lock(&the_tps->lock); |
849 | |
850 | vdcdc2 = i2c_smbus_read_byte_data(client: the_tps->client, TPS_VDCDC2); |
851 | vdcdc2 &= ~(1 << 1); |
852 | if (value) |
853 | vdcdc2 |= (1 << 1); |
854 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
855 | TPS_VDCDC2, value: vdcdc2); |
856 | |
857 | pr_debug("%s: vibrator %s\n" , DRIVER_NAME, value ? "on" : "off" ); |
858 | |
859 | mutex_unlock(lock: &the_tps->lock); |
860 | return status; |
861 | } |
862 | EXPORT_SYMBOL(tps65010_set_vib); |
863 | |
864 | /*-------------------------------------------------------------------------*/ |
865 | /* tps65010_set_low_pwr parameter: |
866 | * mode: ON or OFF |
867 | */ |
868 | int tps65010_set_low_pwr(unsigned mode) |
869 | { |
870 | int status; |
871 | unsigned vdcdc1; |
872 | |
873 | if (!the_tps) |
874 | return -ENODEV; |
875 | |
876 | mutex_lock(&the_tps->lock); |
877 | |
878 | pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n" , DRIVER_NAME, |
879 | mode ? "enable" : "disable" , |
880 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
881 | |
882 | vdcdc1 = i2c_smbus_read_byte_data(client: the_tps->client, TPS_VDCDC1); |
883 | |
884 | switch (mode) { |
885 | case OFF: |
886 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
887 | break; |
888 | /* case ON: */ |
889 | default: |
890 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
891 | break; |
892 | } |
893 | |
894 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
895 | TPS_VDCDC1, value: vdcdc1); |
896 | |
897 | if (status != 0) |
898 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n" , |
899 | DRIVER_NAME); |
900 | else |
901 | pr_debug("%s: vdcdc1 0x%02x\n" , DRIVER_NAME, |
902 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
903 | |
904 | mutex_unlock(lock: &the_tps->lock); |
905 | |
906 | return status; |
907 | } |
908 | EXPORT_SYMBOL(tps65010_set_low_pwr); |
909 | |
910 | /*-------------------------------------------------------------------------*/ |
911 | /* tps65010_config_vregs1 parameter: |
912 | * value to be written to VREGS1 register |
913 | * Note: The complete register is written, set all bits you need |
914 | */ |
915 | int tps65010_config_vregs1(unsigned value) |
916 | { |
917 | int status; |
918 | |
919 | if (!the_tps) |
920 | return -ENODEV; |
921 | |
922 | mutex_lock(&the_tps->lock); |
923 | |
924 | pr_debug("%s: vregs1 0x%02x\n" , DRIVER_NAME, |
925 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
926 | |
927 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
928 | TPS_VREGS1, value); |
929 | |
930 | if (status != 0) |
931 | printk(KERN_ERR "%s: Failed to write vregs1 register\n" , |
932 | DRIVER_NAME); |
933 | else |
934 | pr_debug("%s: vregs1 0x%02x\n" , DRIVER_NAME, |
935 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
936 | |
937 | mutex_unlock(lock: &the_tps->lock); |
938 | |
939 | return status; |
940 | } |
941 | EXPORT_SYMBOL(tps65010_config_vregs1); |
942 | |
943 | int tps65010_config_vdcdc2(unsigned value) |
944 | { |
945 | struct i2c_client *c; |
946 | int status; |
947 | |
948 | if (!the_tps) |
949 | return -ENODEV; |
950 | |
951 | c = the_tps->client; |
952 | mutex_lock(&the_tps->lock); |
953 | |
954 | pr_debug("%s: vdcdc2 0x%02x\n" , DRIVER_NAME, |
955 | i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
956 | |
957 | status = i2c_smbus_write_byte_data(client: c, TPS_VDCDC2, value); |
958 | |
959 | if (status != 0) |
960 | printk(KERN_ERR "%s: Failed to write vdcdc2 register\n" , |
961 | DRIVER_NAME); |
962 | else |
963 | pr_debug("%s: vregs1 0x%02x\n" , DRIVER_NAME, |
964 | i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
965 | |
966 | mutex_unlock(lock: &the_tps->lock); |
967 | return status; |
968 | } |
969 | EXPORT_SYMBOL(tps65010_config_vdcdc2); |
970 | |
971 | /*-------------------------------------------------------------------------*/ |
972 | /* tps65013_set_low_pwr parameter: |
973 | * mode: ON or OFF |
974 | */ |
975 | |
976 | /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not |
977 | required if power supply is through a battery */ |
978 | |
979 | int tps65013_set_low_pwr(unsigned mode) |
980 | { |
981 | int status; |
982 | unsigned vdcdc1, chgconfig; |
983 | |
984 | if (!the_tps || the_tps->por) |
985 | return -ENODEV; |
986 | |
987 | mutex_lock(&the_tps->lock); |
988 | |
989 | pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n" , |
990 | DRIVER_NAME, |
991 | mode ? "enable" : "disable" , |
992 | i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), |
993 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
994 | |
995 | chgconfig = i2c_smbus_read_byte_data(client: the_tps->client, TPS_CHGCONFIG); |
996 | vdcdc1 = i2c_smbus_read_byte_data(client: the_tps->client, TPS_VDCDC1); |
997 | |
998 | switch (mode) { |
999 | case OFF: |
1000 | chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ |
1001 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
1002 | break; |
1003 | /* case ON: */ |
1004 | default: |
1005 | chgconfig |= TPS65013_AUA; /* enable AUA bit */ |
1006 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
1007 | break; |
1008 | } |
1009 | |
1010 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
1011 | TPS_CHGCONFIG, value: chgconfig); |
1012 | if (status != 0) { |
1013 | printk(KERN_ERR "%s: Failed to write chconfig register\n" , |
1014 | DRIVER_NAME); |
1015 | mutex_unlock(lock: &the_tps->lock); |
1016 | return status; |
1017 | } |
1018 | |
1019 | chgconfig = i2c_smbus_read_byte_data(client: the_tps->client, TPS_CHGCONFIG); |
1020 | the_tps->chgconf = chgconfig; |
1021 | show_chgconfig(por: 0, label: "chgconf" , chgconfig); |
1022 | |
1023 | status = i2c_smbus_write_byte_data(client: the_tps->client, |
1024 | TPS_VDCDC1, value: vdcdc1); |
1025 | |
1026 | if (status != 0) |
1027 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n" , |
1028 | DRIVER_NAME); |
1029 | else |
1030 | pr_debug("%s: vdcdc1 0x%02x\n" , DRIVER_NAME, |
1031 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
1032 | |
1033 | mutex_unlock(lock: &the_tps->lock); |
1034 | |
1035 | return status; |
1036 | } |
1037 | EXPORT_SYMBOL(tps65013_set_low_pwr); |
1038 | |
1039 | /*-------------------------------------------------------------------------*/ |
1040 | |
1041 | static int __init tps_init(void) |
1042 | { |
1043 | return i2c_add_driver(&tps65010_driver); |
1044 | } |
1045 | /* NOTE: this MUST be initialized before the other parts of the system |
1046 | * that rely on it ... but after the i2c bus on which this relies. |
1047 | * That is, much earlier than on PC-type systems, which don't often use |
1048 | * I2C as a core system bus. |
1049 | */ |
1050 | subsys_initcall(tps_init); |
1051 | |
1052 | static void __exit tps_exit(void) |
1053 | { |
1054 | i2c_del_driver(driver: &tps65010_driver); |
1055 | } |
1056 | module_exit(tps_exit); |
1057 | |
1058 | |