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8e005935 UKK |
1 | /* |
2 | * Copyright 2009-2010 Pengutronix | |
3 | * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> | |
4 | * | |
5 | * loosely based on an earlier driver that has | |
6 | * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it under | |
9 | * the terms of the GNU General Public License version 2 as published by the | |
10 | * Free Software Foundation. | |
11 | */ | |
8e005935 UKK |
12 | |
13 | #include <linux/slab.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/mutex.h> | |
17 | #include <linux/interrupt.h> | |
8e005935 UKK |
18 | #include <linux/mfd/core.h> |
19 | #include <linux/mfd/mc13xxx.h> | |
876989d5 SG |
20 | #include <linux/of.h> |
21 | #include <linux/of_device.h> | |
22 | #include <linux/of_gpio.h> | |
8e005935 | 23 | |
a0c7c1d4 | 24 | #include "mc13xxx.h" |
8e005935 | 25 | |
8e005935 UKK |
26 | #define MC13XXX_IRQSTAT0 0 |
27 | #define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0) | |
28 | #define MC13XXX_IRQSTAT0_ADCBISDONEI (1 << 1) | |
29 | #define MC13XXX_IRQSTAT0_TSI (1 << 2) | |
30 | #define MC13783_IRQSTAT0_WHIGHI (1 << 3) | |
31 | #define MC13783_IRQSTAT0_WLOWI (1 << 4) | |
32 | #define MC13XXX_IRQSTAT0_CHGDETI (1 << 6) | |
33 | #define MC13783_IRQSTAT0_CHGOVI (1 << 7) | |
34 | #define MC13XXX_IRQSTAT0_CHGREVI (1 << 8) | |
35 | #define MC13XXX_IRQSTAT0_CHGSHORTI (1 << 9) | |
36 | #define MC13XXX_IRQSTAT0_CCCVI (1 << 10) | |
37 | #define MC13XXX_IRQSTAT0_CHGCURRI (1 << 11) | |
38 | #define MC13XXX_IRQSTAT0_BPONI (1 << 12) | |
39 | #define MC13XXX_IRQSTAT0_LOBATLI (1 << 13) | |
40 | #define MC13XXX_IRQSTAT0_LOBATHI (1 << 14) | |
41 | #define MC13783_IRQSTAT0_UDPI (1 << 15) | |
42 | #define MC13783_IRQSTAT0_USBI (1 << 16) | |
43 | #define MC13783_IRQSTAT0_IDI (1 << 19) | |
44 | #define MC13783_IRQSTAT0_SE1I (1 << 21) | |
45 | #define MC13783_IRQSTAT0_CKDETI (1 << 22) | |
46 | #define MC13783_IRQSTAT0_UDMI (1 << 23) | |
47 | ||
48 | #define MC13XXX_IRQMASK0 1 | |
49 | #define MC13XXX_IRQMASK0_ADCDONEM MC13XXX_IRQSTAT0_ADCDONEI | |
50 | #define MC13XXX_IRQMASK0_ADCBISDONEM MC13XXX_IRQSTAT0_ADCBISDONEI | |
51 | #define MC13XXX_IRQMASK0_TSM MC13XXX_IRQSTAT0_TSI | |
52 | #define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI | |
53 | #define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI | |
54 | #define MC13XXX_IRQMASK0_CHGDETM MC13XXX_IRQSTAT0_CHGDETI | |
55 | #define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI | |
56 | #define MC13XXX_IRQMASK0_CHGREVM MC13XXX_IRQSTAT0_CHGREVI | |
57 | #define MC13XXX_IRQMASK0_CHGSHORTM MC13XXX_IRQSTAT0_CHGSHORTI | |
58 | #define MC13XXX_IRQMASK0_CCCVM MC13XXX_IRQSTAT0_CCCVI | |
59 | #define MC13XXX_IRQMASK0_CHGCURRM MC13XXX_IRQSTAT0_CHGCURRI | |
60 | #define MC13XXX_IRQMASK0_BPONM MC13XXX_IRQSTAT0_BPONI | |
61 | #define MC13XXX_IRQMASK0_LOBATLM MC13XXX_IRQSTAT0_LOBATLI | |
62 | #define MC13XXX_IRQMASK0_LOBATHM MC13XXX_IRQSTAT0_LOBATHI | |
63 | #define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI | |
64 | #define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI | |
65 | #define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI | |
66 | #define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I | |
67 | #define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI | |
68 | #define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI | |
69 | ||
70 | #define MC13XXX_IRQSTAT1 3 | |
71 | #define MC13XXX_IRQSTAT1_1HZI (1 << 0) | |
72 | #define MC13XXX_IRQSTAT1_TODAI (1 << 1) | |
73 | #define MC13783_IRQSTAT1_ONOFD1I (1 << 3) | |
74 | #define MC13783_IRQSTAT1_ONOFD2I (1 << 4) | |
75 | #define MC13783_IRQSTAT1_ONOFD3I (1 << 5) | |
76 | #define MC13XXX_IRQSTAT1_SYSRSTI (1 << 6) | |
77 | #define MC13XXX_IRQSTAT1_RTCRSTI (1 << 7) | |
78 | #define MC13XXX_IRQSTAT1_PCI (1 << 8) | |
79 | #define MC13XXX_IRQSTAT1_WARMI (1 << 9) | |
80 | #define MC13XXX_IRQSTAT1_MEMHLDI (1 << 10) | |
81 | #define MC13783_IRQSTAT1_PWRRDYI (1 << 11) | |
82 | #define MC13XXX_IRQSTAT1_THWARNLI (1 << 12) | |
83 | #define MC13XXX_IRQSTAT1_THWARNHI (1 << 13) | |
84 | #define MC13XXX_IRQSTAT1_CLKI (1 << 14) | |
85 | #define MC13783_IRQSTAT1_SEMAFI (1 << 15) | |
86 | #define MC13783_IRQSTAT1_MC2BI (1 << 17) | |
87 | #define MC13783_IRQSTAT1_HSDETI (1 << 18) | |
88 | #define MC13783_IRQSTAT1_HSLI (1 << 19) | |
89 | #define MC13783_IRQSTAT1_ALSPTHI (1 << 20) | |
90 | #define MC13783_IRQSTAT1_AHSSHORTI (1 << 21) | |
91 | ||
92 | #define MC13XXX_IRQMASK1 4 | |
93 | #define MC13XXX_IRQMASK1_1HZM MC13XXX_IRQSTAT1_1HZI | |
94 | #define MC13XXX_IRQMASK1_TODAM MC13XXX_IRQSTAT1_TODAI | |
95 | #define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I | |
96 | #define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I | |
97 | #define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I | |
98 | #define MC13XXX_IRQMASK1_SYSRSTM MC13XXX_IRQSTAT1_SYSRSTI | |
99 | #define MC13XXX_IRQMASK1_RTCRSTM MC13XXX_IRQSTAT1_RTCRSTI | |
100 | #define MC13XXX_IRQMASK1_PCM MC13XXX_IRQSTAT1_PCI | |
101 | #define MC13XXX_IRQMASK1_WARMM MC13XXX_IRQSTAT1_WARMI | |
102 | #define MC13XXX_IRQMASK1_MEMHLDM MC13XXX_IRQSTAT1_MEMHLDI | |
103 | #define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI | |
104 | #define MC13XXX_IRQMASK1_THWARNLM MC13XXX_IRQSTAT1_THWARNLI | |
105 | #define MC13XXX_IRQMASK1_THWARNHM MC13XXX_IRQSTAT1_THWARNHI | |
106 | #define MC13XXX_IRQMASK1_CLKM MC13XXX_IRQSTAT1_CLKI | |
107 | #define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI | |
108 | #define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI | |
109 | #define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI | |
110 | #define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI | |
111 | #define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI | |
112 | #define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI | |
113 | ||
114 | #define MC13XXX_REVISION 7 | |
115 | #define MC13XXX_REVISION_REVMETAL (0x07 << 0) | |
116 | #define MC13XXX_REVISION_REVFULL (0x03 << 3) | |
117 | #define MC13XXX_REVISION_ICID (0x07 << 6) | |
118 | #define MC13XXX_REVISION_FIN (0x03 << 9) | |
119 | #define MC13XXX_REVISION_FAB (0x03 << 11) | |
120 | #define MC13XXX_REVISION_ICIDCODE (0x3f << 13) | |
121 | ||
fec316d6 UKK |
122 | #define MC13XXX_ADC1 44 |
123 | #define MC13XXX_ADC1_ADEN (1 << 0) | |
124 | #define MC13XXX_ADC1_RAND (1 << 1) | |
125 | #define MC13XXX_ADC1_ADSEL (1 << 3) | |
126 | #define MC13XXX_ADC1_ASC (1 << 20) | |
127 | #define MC13XXX_ADC1_ADTRIGIGN (1 << 21) | |
8e005935 | 128 | |
fec316d6 | 129 | #define MC13XXX_ADC2 45 |
8e005935 | 130 | |
8e005935 UKK |
131 | void mc13xxx_lock(struct mc13xxx *mc13xxx) |
132 | { | |
133 | if (!mutex_trylock(&mc13xxx->lock)) { | |
5006fe54 | 134 | dev_dbg(mc13xxx->dev, "wait for %s from %pf\n", |
8e005935 UKK |
135 | __func__, __builtin_return_address(0)); |
136 | ||
137 | mutex_lock(&mc13xxx->lock); | |
138 | } | |
5006fe54 | 139 | dev_dbg(mc13xxx->dev, "%s from %pf\n", |
8e005935 UKK |
140 | __func__, __builtin_return_address(0)); |
141 | } | |
142 | EXPORT_SYMBOL(mc13xxx_lock); | |
143 | ||
144 | void mc13xxx_unlock(struct mc13xxx *mc13xxx) | |
145 | { | |
5006fe54 | 146 | dev_dbg(mc13xxx->dev, "%s from %pf\n", |
8e005935 UKK |
147 | __func__, __builtin_return_address(0)); |
148 | mutex_unlock(&mc13xxx->lock); | |
149 | } | |
150 | EXPORT_SYMBOL(mc13xxx_unlock); | |
151 | ||
8e005935 UKK |
152 | int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) |
153 | { | |
8e005935 UKK |
154 | int ret; |
155 | ||
156 | BUG_ON(!mutex_is_locked(&mc13xxx->lock)); | |
157 | ||
158 | if (offset > MC13XXX_NUMREGS) | |
159 | return -EINVAL; | |
160 | ||
91b5e741 | 161 | ret = regmap_read(mc13xxx->regmap, offset, val); |
5006fe54 | 162 | dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val); |
8e005935 | 163 | |
5006fe54 | 164 | return ret; |
8e005935 UKK |
165 | } |
166 | EXPORT_SYMBOL(mc13xxx_reg_read); | |
167 | ||
168 | int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) | |
169 | { | |
8e005935 UKK |
170 | BUG_ON(!mutex_is_locked(&mc13xxx->lock)); |
171 | ||
5006fe54 | 172 | dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val); |
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173 | |
174 | if (offset > MC13XXX_NUMREGS || val > 0xffffff) | |
175 | return -EINVAL; | |
176 | ||
91b5e741 | 177 | return regmap_write(mc13xxx->regmap, offset, val); |
8e005935 UKK |
178 | } |
179 | EXPORT_SYMBOL(mc13xxx_reg_write); | |
180 | ||
181 | int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset, | |
182 | u32 mask, u32 val) | |
183 | { | |
91b5e741 | 184 | BUG_ON(!mutex_is_locked(&mc13xxx->lock)); |
8e005935 | 185 | BUG_ON(val & ~mask); |
91b5e741 MR |
186 | dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n", |
187 | offset, val, mask); | |
8e005935 | 188 | |
91b5e741 | 189 | return regmap_update_bits(mc13xxx->regmap, offset, mask, val); |
8e005935 UKK |
190 | } |
191 | EXPORT_SYMBOL(mc13xxx_reg_rmw); | |
192 | ||
193 | int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq) | |
194 | { | |
195 | int ret; | |
196 | unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; | |
197 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
198 | u32 mask; | |
199 | ||
200 | if (irq < 0 || irq >= MC13XXX_NUM_IRQ) | |
201 | return -EINVAL; | |
202 | ||
203 | ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); | |
204 | if (ret) | |
205 | return ret; | |
206 | ||
207 | if (mask & irqbit) | |
208 | /* already masked */ | |
209 | return 0; | |
210 | ||
211 | return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit); | |
212 | } | |
213 | EXPORT_SYMBOL(mc13xxx_irq_mask); | |
214 | ||
215 | int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq) | |
216 | { | |
217 | int ret; | |
218 | unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; | |
219 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
220 | u32 mask; | |
221 | ||
222 | if (irq < 0 || irq >= MC13XXX_NUM_IRQ) | |
223 | return -EINVAL; | |
224 | ||
225 | ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); | |
226 | if (ret) | |
227 | return ret; | |
228 | ||
229 | if (!(mask & irqbit)) | |
230 | /* already unmasked */ | |
231 | return 0; | |
232 | ||
233 | return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit); | |
234 | } | |
235 | EXPORT_SYMBOL(mc13xxx_irq_unmask); | |
236 | ||
237 | int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq, | |
238 | int *enabled, int *pending) | |
239 | { | |
240 | int ret; | |
241 | unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; | |
242 | unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1; | |
243 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
244 | ||
245 | if (irq < 0 || irq >= MC13XXX_NUM_IRQ) | |
246 | return -EINVAL; | |
247 | ||
248 | if (enabled) { | |
249 | u32 mask; | |
250 | ||
251 | ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); | |
252 | if (ret) | |
253 | return ret; | |
254 | ||
255 | *enabled = mask & irqbit; | |
256 | } | |
257 | ||
258 | if (pending) { | |
259 | u32 stat; | |
260 | ||
261 | ret = mc13xxx_reg_read(mc13xxx, offstat, &stat); | |
262 | if (ret) | |
263 | return ret; | |
264 | ||
265 | *pending = stat & irqbit; | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | EXPORT_SYMBOL(mc13xxx_irq_status); | |
271 | ||
272 | int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq) | |
273 | { | |
274 | unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1; | |
275 | unsigned int val = 1 << (irq < 24 ? irq : irq - 24); | |
276 | ||
277 | BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ); | |
278 | ||
279 | return mc13xxx_reg_write(mc13xxx, offstat, val); | |
280 | } | |
281 | EXPORT_SYMBOL(mc13xxx_irq_ack); | |
282 | ||
283 | int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq, | |
284 | irq_handler_t handler, const char *name, void *dev) | |
285 | { | |
286 | BUG_ON(!mutex_is_locked(&mc13xxx->lock)); | |
287 | BUG_ON(!handler); | |
288 | ||
289 | if (irq < 0 || irq >= MC13XXX_NUM_IRQ) | |
290 | return -EINVAL; | |
291 | ||
292 | if (mc13xxx->irqhandler[irq]) | |
293 | return -EBUSY; | |
294 | ||
295 | mc13xxx->irqhandler[irq] = handler; | |
296 | mc13xxx->irqdata[irq] = dev; | |
297 | ||
298 | return 0; | |
299 | } | |
300 | EXPORT_SYMBOL(mc13xxx_irq_request_nounmask); | |
301 | ||
302 | int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq, | |
303 | irq_handler_t handler, const char *name, void *dev) | |
304 | { | |
305 | int ret; | |
306 | ||
307 | ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev); | |
308 | if (ret) | |
309 | return ret; | |
310 | ||
311 | ret = mc13xxx_irq_unmask(mc13xxx, irq); | |
312 | if (ret) { | |
313 | mc13xxx->irqhandler[irq] = NULL; | |
314 | mc13xxx->irqdata[irq] = NULL; | |
315 | return ret; | |
316 | } | |
317 | ||
318 | return 0; | |
319 | } | |
320 | EXPORT_SYMBOL(mc13xxx_irq_request); | |
321 | ||
322 | int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev) | |
323 | { | |
324 | int ret; | |
325 | BUG_ON(!mutex_is_locked(&mc13xxx->lock)); | |
326 | ||
327 | if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] || | |
328 | mc13xxx->irqdata[irq] != dev) | |
329 | return -EINVAL; | |
330 | ||
331 | ret = mc13xxx_irq_mask(mc13xxx, irq); | |
332 | if (ret) | |
333 | return ret; | |
334 | ||
335 | mc13xxx->irqhandler[irq] = NULL; | |
336 | mc13xxx->irqdata[irq] = NULL; | |
337 | ||
338 | return 0; | |
339 | } | |
340 | EXPORT_SYMBOL(mc13xxx_irq_free); | |
341 | ||
342 | static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq) | |
343 | { | |
344 | return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]); | |
345 | } | |
346 | ||
347 | /* | |
348 | * returns: number of handled irqs or negative error | |
349 | * locking: holds mc13xxx->lock | |
350 | */ | |
351 | static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx, | |
352 | unsigned int offstat, unsigned int offmask, int baseirq) | |
353 | { | |
354 | u32 stat, mask; | |
355 | int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat); | |
356 | int num_handled = 0; | |
357 | ||
358 | if (ret) | |
359 | return ret; | |
360 | ||
361 | ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); | |
362 | if (ret) | |
363 | return ret; | |
364 | ||
365 | while (stat & ~mask) { | |
366 | int irq = __ffs(stat & ~mask); | |
367 | ||
368 | stat &= ~(1 << irq); | |
369 | ||
370 | if (likely(mc13xxx->irqhandler[baseirq + irq])) { | |
371 | irqreturn_t handled; | |
372 | ||
373 | handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq); | |
374 | if (handled == IRQ_HANDLED) | |
375 | num_handled++; | |
376 | } else { | |
5006fe54 | 377 | dev_err(mc13xxx->dev, |
8e005935 UKK |
378 | "BUG: irq %u but no handler\n", |
379 | baseirq + irq); | |
380 | ||
381 | mask |= 1 << irq; | |
382 | ||
383 | ret = mc13xxx_reg_write(mc13xxx, offmask, mask); | |
384 | } | |
385 | } | |
386 | ||
387 | return num_handled; | |
388 | } | |
389 | ||
390 | static irqreturn_t mc13xxx_irq_thread(int irq, void *data) | |
391 | { | |
392 | struct mc13xxx *mc13xxx = data; | |
393 | irqreturn_t ret; | |
394 | int handled = 0; | |
395 | ||
396 | mc13xxx_lock(mc13xxx); | |
397 | ||
398 | ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0, | |
399 | MC13XXX_IRQMASK0, 0); | |
400 | if (ret > 0) | |
401 | handled = 1; | |
402 | ||
403 | ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1, | |
404 | MC13XXX_IRQMASK1, 24); | |
405 | if (ret > 0) | |
406 | handled = 1; | |
407 | ||
408 | mc13xxx_unlock(mc13xxx); | |
409 | ||
410 | return IRQ_RETVAL(handled); | |
411 | } | |
412 | ||
bb3149a9 | 413 | static const char *mc13xxx_chipname[] = { |
8e005935 UKK |
414 | [MC13XXX_ID_MC13783] = "mc13783", |
415 | [MC13XXX_ID_MC13892] = "mc13892", | |
416 | }; | |
417 | ||
418 | #define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask)) | |
5006fe54 | 419 | static int mc13xxx_identify(struct mc13xxx *mc13xxx) |
8e005935 UKK |
420 | { |
421 | u32 icid; | |
422 | u32 revision; | |
8e005935 UKK |
423 | int ret; |
424 | ||
5006fe54 MR |
425 | /* |
426 | * Get the generation ID from register 46, as apparently some older | |
427 | * IC revisions only have this info at this location. Newer ICs seem to | |
428 | * have both. | |
429 | */ | |
8e005935 UKK |
430 | ret = mc13xxx_reg_read(mc13xxx, 46, &icid); |
431 | if (ret) | |
432 | return ret; | |
433 | ||
434 | icid = (icid >> 6) & 0x7; | |
435 | ||
436 | switch (icid) { | |
437 | case 2: | |
5006fe54 | 438 | mc13xxx->ictype = MC13XXX_ID_MC13783; |
8e005935 UKK |
439 | break; |
440 | case 7: | |
5006fe54 | 441 | mc13xxx->ictype = MC13XXX_ID_MC13892; |
8e005935 UKK |
442 | break; |
443 | default: | |
5006fe54 | 444 | mc13xxx->ictype = MC13XXX_ID_INVALID; |
8e005935 UKK |
445 | break; |
446 | } | |
447 | ||
5006fe54 MR |
448 | if (mc13xxx->ictype == MC13XXX_ID_MC13783 || |
449 | mc13xxx->ictype == MC13XXX_ID_MC13892) { | |
8e005935 | 450 | ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); |
8e005935 | 451 | |
5006fe54 | 452 | dev_info(mc13xxx->dev, "%s: rev: %d.%d, " |
8e005935 | 453 | "fin: %d, fab: %d, icid: %d/%d\n", |
5006fe54 | 454 | mc13xxx_chipname[mc13xxx->ictype], |
8e005935 UKK |
455 | maskval(revision, MC13XXX_REVISION_REVFULL), |
456 | maskval(revision, MC13XXX_REVISION_REVMETAL), | |
457 | maskval(revision, MC13XXX_REVISION_FIN), | |
458 | maskval(revision, MC13XXX_REVISION_FAB), | |
459 | maskval(revision, MC13XXX_REVISION_ICID), | |
460 | maskval(revision, MC13XXX_REVISION_ICIDCODE)); | |
461 | } | |
462 | ||
5006fe54 | 463 | return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0; |
8e005935 UKK |
464 | } |
465 | ||
466 | static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx) | |
467 | { | |
5006fe54 | 468 | return mc13xxx_chipname[mc13xxx->ictype]; |
8e005935 UKK |
469 | } |
470 | ||
8e005935 UKK |
471 | int mc13xxx_get_flags(struct mc13xxx *mc13xxx) |
472 | { | |
876989d5 | 473 | return mc13xxx->flags; |
8e005935 UKK |
474 | } |
475 | EXPORT_SYMBOL(mc13xxx_get_flags); | |
476 | ||
fec316d6 UKK |
477 | #define MC13XXX_ADC1_CHAN0_SHIFT 5 |
478 | #define MC13XXX_ADC1_CHAN1_SHIFT 8 | |
1039d762 MT |
479 | #define MC13783_ADC1_ATO_SHIFT 11 |
480 | #define MC13783_ADC1_ATOX (1 << 19) | |
8e005935 UKK |
481 | |
482 | struct mc13xxx_adcdone_data { | |
483 | struct mc13xxx *mc13xxx; | |
484 | struct completion done; | |
485 | }; | |
486 | ||
fec316d6 | 487 | static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data) |
8e005935 UKK |
488 | { |
489 | struct mc13xxx_adcdone_data *adcdone_data = data; | |
490 | ||
491 | mc13xxx_irq_ack(adcdone_data->mc13xxx, irq); | |
492 | ||
493 | complete_all(&adcdone_data->done); | |
494 | ||
495 | return IRQ_HANDLED; | |
496 | } | |
497 | ||
fec316d6 | 498 | #define MC13XXX_ADC_WORKING (1 << 0) |
8e005935 | 499 | |
fec316d6 | 500 | int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, |
1039d762 MT |
501 | unsigned int channel, u8 ato, bool atox, |
502 | unsigned int *sample) | |
8e005935 | 503 | { |
8e005935 UKK |
504 | u32 adc0, adc1, old_adc0; |
505 | int i, ret; | |
506 | struct mc13xxx_adcdone_data adcdone_data = { | |
507 | .mc13xxx = mc13xxx, | |
508 | }; | |
509 | init_completion(&adcdone_data.done); | |
510 | ||
5006fe54 | 511 | dev_dbg(mc13xxx->dev, "%s\n", __func__); |
8e005935 UKK |
512 | |
513 | mc13xxx_lock(mc13xxx); | |
514 | ||
fec316d6 | 515 | if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) { |
8e005935 UKK |
516 | ret = -EBUSY; |
517 | goto out; | |
518 | } | |
519 | ||
fec316d6 | 520 | mc13xxx->adcflags |= MC13XXX_ADC_WORKING; |
8e005935 | 521 | |
fec316d6 | 522 | mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0); |
8e005935 | 523 | |
fec316d6 UKK |
524 | adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2; |
525 | adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC; | |
8e005935 UKK |
526 | |
527 | if (channel > 7) | |
fec316d6 | 528 | adc1 |= MC13XXX_ADC1_ADSEL; |
8e005935 UKK |
529 | |
530 | switch (mode) { | |
fec316d6 UKK |
531 | case MC13XXX_ADC_MODE_TS: |
532 | adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 | | |
533 | MC13XXX_ADC0_TSMOD1; | |
534 | adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; | |
8e005935 UKK |
535 | break; |
536 | ||
fec316d6 | 537 | case MC13XXX_ADC_MODE_SINGLE_CHAN: |
2161891a | 538 | adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; |
fec316d6 UKK |
539 | adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT; |
540 | adc1 |= MC13XXX_ADC1_RAND; | |
8e005935 UKK |
541 | break; |
542 | ||
fec316d6 | 543 | case MC13XXX_ADC_MODE_MULT_CHAN: |
2161891a | 544 | adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; |
fec316d6 | 545 | adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; |
8e005935 UKK |
546 | break; |
547 | ||
548 | default: | |
fec316d6 | 549 | mc13xxx_unlock(mc13xxx); |
8e005935 UKK |
550 | return -EINVAL; |
551 | } | |
552 | ||
1039d762 MT |
553 | adc1 |= ato << MC13783_ADC1_ATO_SHIFT; |
554 | if (atox) | |
555 | adc1 |= MC13783_ADC1_ATOX; | |
5006fe54 MR |
556 | |
557 | dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__); | |
fec316d6 UKK |
558 | mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE, |
559 | mc13xxx_handler_adcdone, __func__, &adcdone_data); | |
560 | mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE); | |
8e005935 | 561 | |
fec316d6 UKK |
562 | mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0); |
563 | mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1); | |
8e005935 UKK |
564 | |
565 | mc13xxx_unlock(mc13xxx); | |
566 | ||
567 | ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ); | |
568 | ||
569 | if (!ret) | |
570 | ret = -ETIMEDOUT; | |
571 | ||
572 | mc13xxx_lock(mc13xxx); | |
573 | ||
fec316d6 | 574 | mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data); |
8e005935 UKK |
575 | |
576 | if (ret > 0) | |
577 | for (i = 0; i < 4; ++i) { | |
578 | ret = mc13xxx_reg_read(mc13xxx, | |
fec316d6 | 579 | MC13XXX_ADC2, &sample[i]); |
8e005935 UKK |
580 | if (ret) |
581 | break; | |
582 | } | |
583 | ||
fec316d6 | 584 | if (mode == MC13XXX_ADC_MODE_TS) |
8e005935 | 585 | /* restore TSMOD */ |
fec316d6 | 586 | mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0); |
8e005935 | 587 | |
fec316d6 | 588 | mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING; |
8e005935 UKK |
589 | out: |
590 | mc13xxx_unlock(mc13xxx); | |
591 | ||
592 | return ret; | |
593 | } | |
fec316d6 | 594 | EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion); |
8e005935 UKK |
595 | |
596 | static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx, | |
c8a03c96 | 597 | const char *format, void *pdata, size_t pdata_size) |
8e005935 UKK |
598 | { |
599 | char buf[30]; | |
600 | const char *name = mc13xxx_get_chipname(mc13xxx); | |
601 | ||
602 | struct mfd_cell cell = { | |
c8a03c96 SO |
603 | .platform_data = pdata, |
604 | .pdata_size = pdata_size, | |
8e005935 UKK |
605 | }; |
606 | ||
607 | /* there is no asnprintf in the kernel :-( */ | |
608 | if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf)) | |
609 | return -E2BIG; | |
610 | ||
611 | cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL); | |
612 | if (!cell.name) | |
613 | return -ENOMEM; | |
614 | ||
5006fe54 | 615 | return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0); |
8e005935 UKK |
616 | } |
617 | ||
618 | static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) | |
619 | { | |
c8a03c96 | 620 | return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0); |
8e005935 UKK |
621 | } |
622 | ||
876989d5 SG |
623 | #ifdef CONFIG_OF |
624 | static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) | |
625 | { | |
91b5e741 | 626 | struct device_node *np = mc13xxx->dev->of_node; |
876989d5 SG |
627 | |
628 | if (!np) | |
629 | return -ENODEV; | |
630 | ||
631 | if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL)) | |
632 | mc13xxx->flags |= MC13XXX_USE_ADC; | |
633 | ||
634 | if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL)) | |
635 | mc13xxx->flags |= MC13XXX_USE_CODEC; | |
636 | ||
637 | if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL)) | |
638 | mc13xxx->flags |= MC13XXX_USE_RTC; | |
639 | ||
640 | if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL)) | |
641 | mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN; | |
642 | ||
643 | return 0; | |
644 | } | |
645 | #else | |
646 | static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) | |
647 | { | |
648 | return -ENODEV; | |
649 | } | |
650 | #endif | |
651 | ||
a0c7c1d4 | 652 | int mc13xxx_common_init(struct mc13xxx *mc13xxx, |
5006fe54 | 653 | struct mc13xxx_platform_data *pdata, int irq) |
8e005935 | 654 | { |
8e005935 UKK |
655 | int ret; |
656 | ||
8e005935 UKK |
657 | mc13xxx_lock(mc13xxx); |
658 | ||
5006fe54 MR |
659 | ret = mc13xxx_identify(mc13xxx); |
660 | if (ret) | |
8e005935 UKK |
661 | goto err_revision; |
662 | ||
663 | /* mask all irqs */ | |
664 | ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff); | |
665 | if (ret) | |
666 | goto err_mask; | |
667 | ||
668 | ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff); | |
669 | if (ret) | |
670 | goto err_mask; | |
671 | ||
5006fe54 | 672 | ret = request_threaded_irq(irq, NULL, mc13xxx_irq_thread, |
8e005935 UKK |
673 | IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx); |
674 | ||
675 | if (ret) { | |
676 | err_mask: | |
677 | err_revision: | |
e1b88eb0 | 678 | mc13xxx_unlock(mc13xxx); |
8e005935 UKK |
679 | kfree(mc13xxx); |
680 | return ret; | |
681 | } | |
682 | ||
5006fe54 MR |
683 | mc13xxx->irq = irq; |
684 | ||
8e005935 UKK |
685 | mc13xxx_unlock(mc13xxx); |
686 | ||
876989d5 SG |
687 | if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata) |
688 | mc13xxx->flags = pdata->flags; | |
689 | ||
690 | if (mc13xxx->flags & MC13XXX_USE_ADC) | |
8e005935 UKK |
691 | mc13xxx_add_subdevice(mc13xxx, "%s-adc"); |
692 | ||
876989d5 | 693 | if (mc13xxx->flags & MC13XXX_USE_CODEC) |
e3a0871c PR |
694 | mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec", |
695 | pdata->codec, sizeof(*pdata->codec)); | |
8e005935 | 696 | |
876989d5 | 697 | if (mc13xxx->flags & MC13XXX_USE_RTC) |
8e005935 UKK |
698 | mc13xxx_add_subdevice(mc13xxx, "%s-rtc"); |
699 | ||
876989d5 | 700 | if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN) |
1039d762 MT |
701 | mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts", |
702 | &pdata->touch, sizeof(pdata->touch)); | |
8e005935 | 703 | |
876989d5 SG |
704 | if (pdata) { |
705 | mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator", | |
706 | &pdata->regulators, sizeof(pdata->regulators)); | |
c8a03c96 SO |
707 | mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led", |
708 | pdata->leds, sizeof(*pdata->leds)); | |
30fc7ac3 PR |
709 | mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton", |
710 | pdata->buttons, sizeof(*pdata->buttons)); | |
876989d5 SG |
711 | } else { |
712 | mc13xxx_add_subdevice(mc13xxx, "%s-regulator"); | |
713 | mc13xxx_add_subdevice(mc13xxx, "%s-led"); | |
714 | mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton"); | |
715 | } | |
30fc7ac3 | 716 | |
8e005935 UKK |
717 | return 0; |
718 | } | |
a0c7c1d4 | 719 | EXPORT_SYMBOL_GPL(mc13xxx_common_init); |
8e005935 | 720 | |
a0c7c1d4 | 721 | void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) |
8e005935 | 722 | { |
5006fe54 | 723 | free_irq(mc13xxx->irq, mc13xxx); |
8e005935 | 724 | |
5006fe54 | 725 | mfd_remove_devices(mc13xxx->dev); |
8e005935 | 726 | |
91b5e741 | 727 | regmap_exit(mc13xxx->regmap); |
8e005935 | 728 | |
cef92fe6 | 729 | kfree(mc13xxx); |
8e005935 | 730 | } |
a0c7c1d4 | 731 | EXPORT_SYMBOL_GPL(mc13xxx_common_cleanup); |
8e005935 UKK |
732 | |
733 | MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); | |
734 | MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>"); | |
735 | MODULE_LICENSE("GPL v2"); |