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8238addc | 1 | /* |
9e272677 UKK |
2 | * Copyright 2009 Pengutronix |
3 | * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> | |
8238addc | 4 | * |
9e272677 UKK |
5 | * loosely based on an earlier driver that has |
6 | * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de> | |
8238addc | 7 | * |
9e272677 UKK |
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. | |
8238addc | 11 | */ |
5a0e3ad6 | 12 | #include <linux/slab.h> |
8238addc | 13 | #include <linux/module.h> |
b6e6d54c UKK |
14 | #include <linux/platform_device.h> |
15 | #include <linux/mutex.h> | |
16 | #include <linux/interrupt.h> | |
9e272677 UKK |
17 | #include <linux/spi/spi.h> |
18 | #include <linux/mfd/core.h> | |
b6e6d54c UKK |
19 | #include <linux/mfd/mc13783.h> |
20 | ||
21 | struct mc13783 { | |
22 | struct spi_device *spidev; | |
23 | struct mutex lock; | |
24 | int irq; | |
25 | int flags; | |
26 | ||
27 | irq_handler_t irqhandler[MC13783_NUM_IRQ]; | |
28 | void *irqdata[MC13783_NUM_IRQ]; | |
29 | ||
30 | /* XXX these should go as platformdata to the regulator subdevice */ | |
31 | struct mc13783_regulator_init_data *regulators; | |
32 | int num_regulators; | |
33 | }; | |
34 | ||
35 | #define MC13783_REG_REVISION 7 | |
36 | #define MC13783_REG_ADC_0 43 | |
37 | #define MC13783_REG_ADC_1 44 | |
38 | #define MC13783_REG_ADC_2 45 | |
9e272677 UKK |
39 | |
40 | #define MC13783_IRQSTAT0 0 | |
41 | #define MC13783_IRQSTAT0_ADCDONEI (1 << 0) | |
42 | #define MC13783_IRQSTAT0_ADCBISDONEI (1 << 1) | |
43 | #define MC13783_IRQSTAT0_TSI (1 << 2) | |
44 | #define MC13783_IRQSTAT0_WHIGHI (1 << 3) | |
45 | #define MC13783_IRQSTAT0_WLOWI (1 << 4) | |
46 | #define MC13783_IRQSTAT0_CHGDETI (1 << 6) | |
47 | #define MC13783_IRQSTAT0_CHGOVI (1 << 7) | |
48 | #define MC13783_IRQSTAT0_CHGREVI (1 << 8) | |
49 | #define MC13783_IRQSTAT0_CHGSHORTI (1 << 9) | |
50 | #define MC13783_IRQSTAT0_CCCVI (1 << 10) | |
51 | #define MC13783_IRQSTAT0_CHGCURRI (1 << 11) | |
52 | #define MC13783_IRQSTAT0_BPONI (1 << 12) | |
53 | #define MC13783_IRQSTAT0_LOBATLI (1 << 13) | |
54 | #define MC13783_IRQSTAT0_LOBATHI (1 << 14) | |
55 | #define MC13783_IRQSTAT0_UDPI (1 << 15) | |
56 | #define MC13783_IRQSTAT0_USBI (1 << 16) | |
57 | #define MC13783_IRQSTAT0_IDI (1 << 19) | |
58 | #define MC13783_IRQSTAT0_SE1I (1 << 21) | |
59 | #define MC13783_IRQSTAT0_CKDETI (1 << 22) | |
60 | #define MC13783_IRQSTAT0_UDMI (1 << 23) | |
61 | ||
62 | #define MC13783_IRQMASK0 1 | |
63 | #define MC13783_IRQMASK0_ADCDONEM MC13783_IRQSTAT0_ADCDONEI | |
64 | #define MC13783_IRQMASK0_ADCBISDONEM MC13783_IRQSTAT0_ADCBISDONEI | |
65 | #define MC13783_IRQMASK0_TSM MC13783_IRQSTAT0_TSI | |
66 | #define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI | |
67 | #define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI | |
68 | #define MC13783_IRQMASK0_CHGDETM MC13783_IRQSTAT0_CHGDETI | |
69 | #define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI | |
70 | #define MC13783_IRQMASK0_CHGREVM MC13783_IRQSTAT0_CHGREVI | |
71 | #define MC13783_IRQMASK0_CHGSHORTM MC13783_IRQSTAT0_CHGSHORTI | |
72 | #define MC13783_IRQMASK0_CCCVM MC13783_IRQSTAT0_CCCVI | |
73 | #define MC13783_IRQMASK0_CHGCURRM MC13783_IRQSTAT0_CHGCURRI | |
74 | #define MC13783_IRQMASK0_BPONM MC13783_IRQSTAT0_BPONI | |
75 | #define MC13783_IRQMASK0_LOBATLM MC13783_IRQSTAT0_LOBATLI | |
76 | #define MC13783_IRQMASK0_LOBATHM MC13783_IRQSTAT0_LOBATHI | |
77 | #define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI | |
78 | #define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI | |
79 | #define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI | |
80 | #define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I | |
81 | #define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI | |
82 | #define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI | |
83 | ||
84 | #define MC13783_IRQSTAT1 3 | |
85 | #define MC13783_IRQSTAT1_1HZI (1 << 0) | |
86 | #define MC13783_IRQSTAT1_TODAI (1 << 1) | |
87 | #define MC13783_IRQSTAT1_ONOFD1I (1 << 3) | |
88 | #define MC13783_IRQSTAT1_ONOFD2I (1 << 4) | |
89 | #define MC13783_IRQSTAT1_ONOFD3I (1 << 5) | |
90 | #define MC13783_IRQSTAT1_SYSRSTI (1 << 6) | |
91 | #define MC13783_IRQSTAT1_RTCRSTI (1 << 7) | |
92 | #define MC13783_IRQSTAT1_PCI (1 << 8) | |
93 | #define MC13783_IRQSTAT1_WARMI (1 << 9) | |
94 | #define MC13783_IRQSTAT1_MEMHLDI (1 << 10) | |
95 | #define MC13783_IRQSTAT1_PWRRDYI (1 << 11) | |
96 | #define MC13783_IRQSTAT1_THWARNLI (1 << 12) | |
97 | #define MC13783_IRQSTAT1_THWARNHI (1 << 13) | |
98 | #define MC13783_IRQSTAT1_CLKI (1 << 14) | |
99 | #define MC13783_IRQSTAT1_SEMAFI (1 << 15) | |
100 | #define MC13783_IRQSTAT1_MC2BI (1 << 17) | |
101 | #define MC13783_IRQSTAT1_HSDETI (1 << 18) | |
102 | #define MC13783_IRQSTAT1_HSLI (1 << 19) | |
103 | #define MC13783_IRQSTAT1_ALSPTHI (1 << 20) | |
104 | #define MC13783_IRQSTAT1_AHSSHORTI (1 << 21) | |
105 | ||
106 | #define MC13783_IRQMASK1 4 | |
107 | #define MC13783_IRQMASK1_1HZM MC13783_IRQSTAT1_1HZI | |
108 | #define MC13783_IRQMASK1_TODAM MC13783_IRQSTAT1_TODAI | |
109 | #define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I | |
110 | #define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I | |
111 | #define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I | |
112 | #define MC13783_IRQMASK1_SYSRSTM MC13783_IRQSTAT1_SYSRSTI | |
113 | #define MC13783_IRQMASK1_RTCRSTM MC13783_IRQSTAT1_RTCRSTI | |
114 | #define MC13783_IRQMASK1_PCM MC13783_IRQSTAT1_PCI | |
115 | #define MC13783_IRQMASK1_WARMM MC13783_IRQSTAT1_WARMI | |
116 | #define MC13783_IRQMASK1_MEMHLDM MC13783_IRQSTAT1_MEMHLDI | |
117 | #define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI | |
118 | #define MC13783_IRQMASK1_THWARNLM MC13783_IRQSTAT1_THWARNLI | |
119 | #define MC13783_IRQMASK1_THWARNHM MC13783_IRQSTAT1_THWARNHI | |
120 | #define MC13783_IRQMASK1_CLKM MC13783_IRQSTAT1_CLKI | |
121 | #define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI | |
122 | #define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI | |
123 | #define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI | |
124 | #define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI | |
125 | #define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI | |
126 | #define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI | |
127 | ||
128 | #define MC13783_ADC1 44 | |
129 | #define MC13783_ADC1_ADEN (1 << 0) | |
130 | #define MC13783_ADC1_RAND (1 << 1) | |
131 | #define MC13783_ADC1_ADSEL (1 << 3) | |
132 | #define MC13783_ADC1_ASC (1 << 20) | |
133 | #define MC13783_ADC1_ADTRIGIGN (1 << 21) | |
134 | ||
135 | #define MC13783_NUMREGS 0x3f | |
136 | ||
137 | void mc13783_lock(struct mc13783 *mc13783) | |
138 | { | |
139 | if (!mutex_trylock(&mc13783->lock)) { | |
140 | dev_dbg(&mc13783->spidev->dev, "wait for %s from %pf\n", | |
141 | __func__, __builtin_return_address(0)); | |
142 | ||
143 | mutex_lock(&mc13783->lock); | |
144 | } | |
145 | dev_dbg(&mc13783->spidev->dev, "%s from %pf\n", | |
146 | __func__, __builtin_return_address(0)); | |
147 | } | |
148 | EXPORT_SYMBOL(mc13783_lock); | |
8238addc | 149 | |
9e272677 UKK |
150 | void mc13783_unlock(struct mc13783 *mc13783) |
151 | { | |
152 | dev_dbg(&mc13783->spidev->dev, "%s from %pf\n", | |
153 | __func__, __builtin_return_address(0)); | |
154 | mutex_unlock(&mc13783->lock); | |
155 | } | |
156 | EXPORT_SYMBOL(mc13783_unlock); | |
8238addc | 157 | |
9e272677 UKK |
158 | #define MC13783_REGOFFSET_SHIFT 25 |
159 | int mc13783_reg_read(struct mc13783 *mc13783, unsigned int offset, u32 *val) | |
8238addc | 160 | { |
9e272677 | 161 | struct spi_transfer t; |
8238addc | 162 | struct spi_message m; |
9e272677 UKK |
163 | int ret; |
164 | ||
165 | BUG_ON(!mutex_is_locked(&mc13783->lock)); | |
166 | ||
167 | if (offset > MC13783_NUMREGS) | |
168 | return -EINVAL; | |
169 | ||
170 | *val = offset << MC13783_REGOFFSET_SHIFT; | |
171 | ||
172 | memset(&t, 0, sizeof(t)); | |
173 | ||
174 | t.tx_buf = val; | |
175 | t.rx_buf = val; | |
176 | t.len = sizeof(u32); | |
8238addc SH |
177 | |
178 | spi_message_init(&m); | |
179 | spi_message_add_tail(&t, &m); | |
8238addc | 180 | |
9e272677 | 181 | ret = spi_sync(mc13783->spidev, &m); |
8238addc | 182 | |
9e272677 UKK |
183 | /* error in message.status implies error return from spi_sync */ |
184 | BUG_ON(!ret && m.status); | |
8238addc | 185 | |
9e272677 UKK |
186 | if (ret) |
187 | return ret; | |
8238addc | 188 | |
9e272677 | 189 | *val &= 0xffffff; |
8238addc | 190 | |
9e272677 | 191 | dev_vdbg(&mc13783->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val); |
8238addc | 192 | |
9e272677 | 193 | return 0; |
8238addc | 194 | } |
9e272677 | 195 | EXPORT_SYMBOL(mc13783_reg_read); |
8238addc | 196 | |
9e272677 | 197 | int mc13783_reg_write(struct mc13783 *mc13783, unsigned int offset, u32 val) |
8238addc | 198 | { |
9e272677 UKK |
199 | u32 buf; |
200 | struct spi_transfer t; | |
201 | struct spi_message m; | |
202 | int ret; | |
203 | ||
204 | BUG_ON(!mutex_is_locked(&mc13783->lock)); | |
8238addc | 205 | |
9e272677 UKK |
206 | dev_vdbg(&mc13783->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val); |
207 | ||
208 | if (offset > MC13783_NUMREGS || val > 0xffffff) | |
8238addc SH |
209 | return -EINVAL; |
210 | ||
9e272677 UKK |
211 | buf = 1 << 31 | offset << MC13783_REGOFFSET_SHIFT | val; |
212 | ||
213 | memset(&t, 0, sizeof(t)); | |
8238addc | 214 | |
9e272677 UKK |
215 | t.tx_buf = &buf; |
216 | t.rx_buf = &buf; | |
217 | t.len = sizeof(u32); | |
218 | ||
219 | spi_message_init(&m); | |
220 | spi_message_add_tail(&t, &m); | |
221 | ||
222 | ret = spi_sync(mc13783->spidev, &m); | |
223 | ||
224 | BUG_ON(!ret && m.status); | |
225 | ||
226 | if (ret) | |
227 | return ret; | |
228 | ||
229 | return 0; | |
8238addc | 230 | } |
9e272677 | 231 | EXPORT_SYMBOL(mc13783_reg_write); |
8238addc | 232 | |
9e272677 UKK |
233 | int mc13783_reg_rmw(struct mc13783 *mc13783, unsigned int offset, |
234 | u32 mask, u32 val) | |
8238addc SH |
235 | { |
236 | int ret; | |
9e272677 | 237 | u32 valread; |
8238addc | 238 | |
9e272677 | 239 | BUG_ON(val & ~mask); |
8238addc | 240 | |
9e272677 UKK |
241 | ret = mc13783_reg_read(mc13783, offset, &valread); |
242 | if (ret) | |
243 | return ret; | |
244 | ||
245 | valread = (valread & ~mask) | val; | |
246 | ||
247 | return mc13783_reg_write(mc13783, offset, valread); | |
8238addc | 248 | } |
9e272677 | 249 | EXPORT_SYMBOL(mc13783_reg_rmw); |
8238addc | 250 | |
3b16bb53 UKK |
251 | int mc13783_get_flags(struct mc13783 *mc13783) |
252 | { | |
253 | return mc13783->flags; | |
254 | } | |
255 | EXPORT_SYMBOL(mc13783_get_flags); | |
256 | ||
57205026 | 257 | int mc13783_irq_mask(struct mc13783 *mc13783, int irq) |
8238addc SH |
258 | { |
259 | int ret; | |
9e272677 UKK |
260 | unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; |
261 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
262 | u32 mask; | |
8238addc | 263 | |
9e272677 UKK |
264 | if (irq < 0 || irq >= MC13783_NUM_IRQ) |
265 | return -EINVAL; | |
8238addc | 266 | |
9e272677 UKK |
267 | ret = mc13783_reg_read(mc13783, offmask, &mask); |
268 | if (ret) | |
269 | return ret; | |
270 | ||
271 | if (mask & irqbit) | |
272 | /* already masked */ | |
273 | return 0; | |
274 | ||
275 | return mc13783_reg_write(mc13783, offmask, mask | irqbit); | |
8238addc | 276 | } |
57205026 | 277 | EXPORT_SYMBOL(mc13783_irq_mask); |
8238addc | 278 | |
57205026 | 279 | int mc13783_irq_unmask(struct mc13783 *mc13783, int irq) |
8238addc | 280 | { |
8238addc | 281 | int ret; |
9e272677 UKK |
282 | unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; |
283 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
284 | u32 mask; | |
8238addc | 285 | |
9e272677 UKK |
286 | if (irq < 0 || irq >= MC13783_NUM_IRQ) |
287 | return -EINVAL; | |
8238addc | 288 | |
9e272677 UKK |
289 | ret = mc13783_reg_read(mc13783, offmask, &mask); |
290 | if (ret) | |
291 | return ret; | |
8238addc | 292 | |
9e272677 UKK |
293 | if (!(mask & irqbit)) |
294 | /* already unmasked */ | |
295 | return 0; | |
8238addc | 296 | |
9e272677 | 297 | return mc13783_reg_write(mc13783, offmask, mask & ~irqbit); |
8238addc | 298 | } |
57205026 UKK |
299 | EXPORT_SYMBOL(mc13783_irq_unmask); |
300 | ||
86c34008 UKK |
301 | int mc13783_irq_status(struct mc13783 *mc13783, int irq, |
302 | int *enabled, int *pending) | |
303 | { | |
304 | int ret; | |
305 | unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; | |
306 | unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1; | |
307 | u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); | |
308 | ||
309 | if (irq < 0 || irq >= MC13783_NUM_IRQ) | |
310 | return -EINVAL; | |
311 | ||
312 | if (enabled) { | |
313 | u32 mask; | |
314 | ||
315 | ret = mc13783_reg_read(mc13783, offmask, &mask); | |
316 | if (ret) | |
317 | return ret; | |
318 | ||
319 | *enabled = mask & irqbit; | |
320 | } | |
321 | ||
322 | if (pending) { | |
323 | u32 stat; | |
324 | ||
325 | ret = mc13783_reg_read(mc13783, offstat, &stat); | |
326 | if (ret) | |
327 | return ret; | |
328 | ||
329 | *pending = stat & irqbit; | |
330 | } | |
331 | ||
332 | return 0; | |
333 | } | |
334 | EXPORT_SYMBOL(mc13783_irq_status); | |
335 | ||
57205026 UKK |
336 | int mc13783_irq_ack(struct mc13783 *mc13783, int irq) |
337 | { | |
338 | unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1; | |
339 | unsigned int val = 1 << (irq < 24 ? irq : irq - 24); | |
340 | ||
341 | BUG_ON(irq < 0 || irq >= MC13783_NUM_IRQ); | |
342 | ||
343 | return mc13783_reg_write(mc13783, offstat, val); | |
344 | } | |
345 | EXPORT_SYMBOL(mc13783_irq_ack); | |
8238addc | 346 | |
9e272677 UKK |
347 | int mc13783_irq_request_nounmask(struct mc13783 *mc13783, int irq, |
348 | irq_handler_t handler, const char *name, void *dev) | |
8238addc | 349 | { |
9e272677 UKK |
350 | BUG_ON(!mutex_is_locked(&mc13783->lock)); |
351 | BUG_ON(!handler); | |
352 | ||
353 | if (irq < 0 || irq >= MC13783_NUM_IRQ) | |
8238addc SH |
354 | return -EINVAL; |
355 | ||
9e272677 | 356 | if (mc13783->irqhandler[irq]) |
8238addc SH |
357 | return -EBUSY; |
358 | ||
9e272677 UKK |
359 | mc13783->irqhandler[irq] = handler; |
360 | mc13783->irqdata[irq] = dev; | |
8238addc SH |
361 | |
362 | return 0; | |
363 | } | |
9e272677 | 364 | EXPORT_SYMBOL(mc13783_irq_request_nounmask); |
8238addc | 365 | |
9e272677 UKK |
366 | int mc13783_irq_request(struct mc13783 *mc13783, int irq, |
367 | irq_handler_t handler, const char *name, void *dev) | |
8238addc | 368 | { |
9e272677 UKK |
369 | int ret; |
370 | ||
371 | ret = mc13783_irq_request_nounmask(mc13783, irq, handler, name, dev); | |
372 | if (ret) | |
373 | return ret; | |
374 | ||
57205026 | 375 | ret = mc13783_irq_unmask(mc13783, irq); |
9e272677 UKK |
376 | if (ret) { |
377 | mc13783->irqhandler[irq] = NULL; | |
378 | mc13783->irqdata[irq] = NULL; | |
379 | return ret; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | } | |
384 | EXPORT_SYMBOL(mc13783_irq_request); | |
385 | ||
386 | int mc13783_irq_free(struct mc13783 *mc13783, int irq, void *dev) | |
387 | { | |
388 | int ret; | |
389 | BUG_ON(!mutex_is_locked(&mc13783->lock)); | |
390 | ||
391 | if (irq < 0 || irq >= MC13783_NUM_IRQ || !mc13783->irqhandler[irq] || | |
392 | mc13783->irqdata[irq] != dev) | |
8238addc SH |
393 | return -EINVAL; |
394 | ||
57205026 | 395 | ret = mc13783_irq_mask(mc13783, irq); |
9e272677 UKK |
396 | if (ret) |
397 | return ret; | |
398 | ||
399 | mc13783->irqhandler[irq] = NULL; | |
400 | mc13783->irqdata[irq] = NULL; | |
8238addc SH |
401 | |
402 | return 0; | |
403 | } | |
9e272677 | 404 | EXPORT_SYMBOL(mc13783_irq_free); |
8238addc | 405 | |
9e272677 | 406 | static inline irqreturn_t mc13783_irqhandler(struct mc13783 *mc13783, int irq) |
8238addc | 407 | { |
9e272677 | 408 | return mc13783->irqhandler[irq](irq, mc13783->irqdata[irq]); |
8238addc SH |
409 | } |
410 | ||
9e272677 UKK |
411 | /* |
412 | * returns: number of handled irqs or negative error | |
413 | * locking: holds mc13783->lock | |
414 | */ | |
415 | static int mc13783_irq_handle(struct mc13783 *mc13783, | |
416 | unsigned int offstat, unsigned int offmask, int baseirq) | |
8238addc | 417 | { |
9e272677 UKK |
418 | u32 stat, mask; |
419 | int ret = mc13783_reg_read(mc13783, offstat, &stat); | |
420 | int num_handled = 0; | |
421 | ||
422 | if (ret) | |
423 | return ret; | |
424 | ||
425 | ret = mc13783_reg_read(mc13783, offmask, &mask); | |
426 | if (ret) | |
427 | return ret; | |
428 | ||
429 | while (stat & ~mask) { | |
430 | int irq = __ffs(stat & ~mask); | |
431 | ||
432 | stat &= ~(1 << irq); | |
433 | ||
434 | if (likely(mc13783->irqhandler[baseirq + irq])) { | |
435 | irqreturn_t handled; | |
8238addc | 436 | |
9e272677 UKK |
437 | handled = mc13783_irqhandler(mc13783, baseirq + irq); |
438 | if (handled == IRQ_HANDLED) | |
439 | num_handled++; | |
440 | } else { | |
441 | dev_err(&mc13783->spidev->dev, | |
442 | "BUG: irq %u but no handler\n", | |
443 | baseirq + irq); | |
8238addc | 444 | |
9e272677 UKK |
445 | mask |= 1 << irq; |
446 | ||
447 | ret = mc13783_reg_write(mc13783, offmask, mask); | |
448 | } | |
449 | } | |
450 | ||
451 | return num_handled; | |
8238addc SH |
452 | } |
453 | ||
9e272677 UKK |
454 | static irqreturn_t mc13783_irq_thread(int irq, void *data) |
455 | { | |
456 | struct mc13783 *mc13783 = data; | |
457 | irqreturn_t ret; | |
458 | int handled = 0; | |
459 | ||
460 | mc13783_lock(mc13783); | |
461 | ||
462 | ret = mc13783_irq_handle(mc13783, MC13783_IRQSTAT0, | |
463 | MC13783_IRQMASK0, MC13783_IRQ_ADCDONE); | |
464 | if (ret > 0) | |
465 | handled = 1; | |
466 | ||
467 | ret = mc13783_irq_handle(mc13783, MC13783_IRQSTAT1, | |
468 | MC13783_IRQMASK1, MC13783_IRQ_1HZ); | |
469 | if (ret > 0) | |
470 | handled = 1; | |
471 | ||
472 | mc13783_unlock(mc13783); | |
473 | ||
474 | return IRQ_RETVAL(handled); | |
475 | } | |
476 | ||
477 | #define MC13783_ADC1_CHAN0_SHIFT 5 | |
478 | #define MC13783_ADC1_CHAN1_SHIFT 8 | |
479 | ||
480 | struct mc13783_adcdone_data { | |
481 | struct mc13783 *mc13783; | |
482 | struct completion done; | |
483 | }; | |
484 | ||
485 | static irqreturn_t mc13783_handler_adcdone(int irq, void *data) | |
486 | { | |
487 | struct mc13783_adcdone_data *adcdone_data = data; | |
488 | ||
57205026 | 489 | mc13783_irq_ack(adcdone_data->mc13783, irq); |
9e272677 UKK |
490 | |
491 | complete_all(&adcdone_data->done); | |
492 | ||
493 | return IRQ_HANDLED; | |
494 | } | |
495 | ||
496 | #define MC13783_ADC_WORKING (1 << 16) | |
497 | ||
8238addc SH |
498 | int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode, |
499 | unsigned int channel, unsigned int *sample) | |
500 | { | |
9e272677 UKK |
501 | u32 adc0, adc1, old_adc0; |
502 | int i, ret; | |
503 | struct mc13783_adcdone_data adcdone_data = { | |
504 | .mc13783 = mc13783, | |
505 | }; | |
506 | init_completion(&adcdone_data.done); | |
507 | ||
508 | dev_dbg(&mc13783->spidev->dev, "%s\n", __func__); | |
509 | ||
510 | mc13783_lock(mc13783); | |
511 | ||
512 | if (mc13783->flags & MC13783_ADC_WORKING) { | |
513 | ret = -EBUSY; | |
514 | goto out; | |
515 | } | |
516 | ||
517 | mc13783->flags |= MC13783_ADC_WORKING; | |
8238addc | 518 | |
9e272677 | 519 | mc13783_reg_read(mc13783, MC13783_ADC0, &old_adc0); |
8238addc | 520 | |
9e272677 UKK |
521 | adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2; |
522 | adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN | MC13783_ADC1_ASC; | |
8238addc | 523 | |
8238addc | 524 | if (channel > 7) |
9e272677 | 525 | adc1 |= MC13783_ADC1_ADSEL; |
8238addc SH |
526 | |
527 | switch (mode) { | |
528 | case MC13783_ADC_MODE_TS: | |
be26d664 UKK |
529 | adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 | |
530 | MC13783_ADC0_TSMOD1; | |
9e272677 | 531 | adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT; |
8238addc | 532 | break; |
9e272677 | 533 | |
8238addc | 534 | case MC13783_ADC_MODE_SINGLE_CHAN: |
9e272677 UKK |
535 | adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK; |
536 | adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT; | |
537 | adc1 |= MC13783_ADC1_RAND; | |
8238addc | 538 | break; |
9e272677 | 539 | |
8238addc | 540 | case MC13783_ADC_MODE_MULT_CHAN: |
9e272677 UKK |
541 | adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK; |
542 | adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT; | |
8238addc | 543 | break; |
9e272677 | 544 | |
8238addc | 545 | default: |
9e272677 | 546 | mc13783_unlock(mc13783); |
8238addc SH |
547 | return -EINVAL; |
548 | } | |
549 | ||
9e272677 UKK |
550 | dev_dbg(&mc13783->spidev->dev, "%s: request irq\n", __func__); |
551 | mc13783_irq_request(mc13783, MC13783_IRQ_ADCDONE, | |
552 | mc13783_handler_adcdone, __func__, &adcdone_data); | |
57205026 | 553 | mc13783_irq_ack(mc13783, MC13783_IRQ_ADCDONE); |
8238addc | 554 | |
9e272677 UKK |
555 | mc13783_reg_write(mc13783, MC13783_REG_ADC_0, adc0); |
556 | mc13783_reg_write(mc13783, MC13783_REG_ADC_1, adc1); | |
8238addc | 557 | |
9e272677 | 558 | mc13783_unlock(mc13783); |
8238addc | 559 | |
9e272677 | 560 | ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ); |
8238addc | 561 | |
9e272677 UKK |
562 | if (!ret) |
563 | ret = -ETIMEDOUT; | |
8238addc | 564 | |
9e272677 UKK |
565 | mc13783_lock(mc13783); |
566 | ||
567 | mc13783_irq_free(mc13783, MC13783_IRQ_ADCDONE, &adcdone_data); | |
568 | ||
569 | if (ret > 0) | |
570 | for (i = 0; i < 4; ++i) { | |
571 | ret = mc13783_reg_read(mc13783, | |
572 | MC13783_REG_ADC_2, &sample[i]); | |
573 | if (ret) | |
574 | break; | |
575 | } | |
576 | ||
577 | if (mode == MC13783_ADC_MODE_TS) | |
578 | /* restore TSMOD */ | |
579 | mc13783_reg_write(mc13783, MC13783_REG_ADC_0, old_adc0); | |
580 | ||
581 | mc13783->flags &= ~MC13783_ADC_WORKING; | |
582 | out: | |
583 | mc13783_unlock(mc13783); | |
584 | ||
585 | return ret; | |
8238addc SH |
586 | } |
587 | EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion); | |
588 | ||
9e272677 UKK |
589 | static int mc13783_add_subdevice_pdata(struct mc13783 *mc13783, |
590 | const char *name, void *pdata, size_t pdata_size) | |
8238addc | 591 | { |
9e272677 UKK |
592 | struct mfd_cell cell = { |
593 | .name = name, | |
594 | .platform_data = pdata, | |
595 | .data_size = pdata_size, | |
596 | }; | |
597 | ||
598 | return mfd_add_devices(&mc13783->spidev->dev, -1, &cell, 1, NULL, 0); | |
599 | } | |
600 | ||
601 | static int mc13783_add_subdevice(struct mc13783 *mc13783, const char *name) | |
602 | { | |
603 | return mc13783_add_subdevice_pdata(mc13783, name, NULL, 0); | |
8238addc | 604 | } |
8238addc SH |
605 | |
606 | static int mc13783_check_revision(struct mc13783 *mc13783) | |
607 | { | |
608 | u32 rev_id, rev1, rev2, finid, icid; | |
609 | ||
9e272677 | 610 | mc13783_reg_read(mc13783, MC13783_REG_REVISION, &rev_id); |
8238addc SH |
611 | |
612 | rev1 = (rev_id & 0x018) >> 3; | |
613 | rev2 = (rev_id & 0x007); | |
614 | icid = (rev_id & 0x01C0) >> 6; | |
615 | finid = (rev_id & 0x01E00) >> 9; | |
616 | ||
617 | /* Ver 0.2 is actually 3.2a. Report as 3.2 */ | |
618 | if ((rev1 == 0) && (rev2 == 2)) | |
619 | rev1 = 3; | |
620 | ||
621 | if (rev1 == 0 || icid != 2) { | |
9e272677 | 622 | dev_err(&mc13783->spidev->dev, "No MC13783 detected.\n"); |
8238addc SH |
623 | return -ENODEV; |
624 | } | |
625 | ||
9e272677 UKK |
626 | dev_info(&mc13783->spidev->dev, |
627 | "MC13783 Rev %d.%d FinVer %x detected\n", | |
628 | rev1, rev2, finid); | |
8238addc SH |
629 | |
630 | return 0; | |
631 | } | |
632 | ||
9e272677 | 633 | static int mc13783_probe(struct spi_device *spi) |
8238addc SH |
634 | { |
635 | struct mc13783 *mc13783; | |
9e272677 | 636 | struct mc13783_platform_data *pdata = dev_get_platdata(&spi->dev); |
8238addc SH |
637 | int ret; |
638 | ||
9e272677 | 639 | mc13783 = kzalloc(sizeof(*mc13783), GFP_KERNEL); |
8238addc SH |
640 | if (!mc13783) |
641 | return -ENOMEM; | |
642 | ||
643 | dev_set_drvdata(&spi->dev, mc13783); | |
644 | spi->mode = SPI_MODE_0 | SPI_CS_HIGH; | |
645 | spi->bits_per_word = 32; | |
646 | spi_setup(spi); | |
647 | ||
9e272677 UKK |
648 | mc13783->spidev = spi; |
649 | ||
650 | mutex_init(&mc13783->lock); | |
651 | mc13783_lock(mc13783); | |
652 | ||
653 | ret = mc13783_check_revision(mc13783); | |
654 | if (ret) | |
655 | goto err_revision; | |
656 | ||
657 | /* mask all irqs */ | |
658 | ret = mc13783_reg_write(mc13783, MC13783_IRQMASK0, 0x00ffffff); | |
659 | if (ret) | |
660 | goto err_mask; | |
8238addc | 661 | |
9e272677 UKK |
662 | ret = mc13783_reg_write(mc13783, MC13783_IRQMASK1, 0x00ffffff); |
663 | if (ret) | |
664 | goto err_mask; | |
665 | ||
666 | ret = request_threaded_irq(spi->irq, NULL, mc13783_irq_thread, | |
667 | IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13783", mc13783); | |
668 | ||
669 | if (ret) { | |
670 | err_mask: | |
671 | err_revision: | |
672 | mutex_unlock(&mc13783->lock); | |
673 | dev_set_drvdata(&spi->dev, NULL); | |
674 | kfree(mc13783); | |
675 | return ret; | |
676 | } | |
8238addc | 677 | |
9e272677 | 678 | /* This should go away (BEGIN) */ |
8238addc SH |
679 | if (pdata) { |
680 | mc13783->flags = pdata->flags; | |
681 | mc13783->regulators = pdata->regulators; | |
682 | mc13783->num_regulators = pdata->num_regulators; | |
683 | } | |
9e272677 | 684 | /* This should go away (END) */ |
8238addc | 685 | |
1e02b2c3 AP |
686 | mc13783_unlock(mc13783); |
687 | ||
9e272677 UKK |
688 | if (pdata->flags & MC13783_USE_ADC) |
689 | mc13783_add_subdevice(mc13783, "mc13783-adc"); | |
690 | ||
691 | if (pdata->flags & MC13783_USE_CODEC) | |
692 | mc13783_add_subdevice(mc13783, "mc13783-codec"); | |
693 | ||
694 | if (pdata->flags & MC13783_USE_REGULATOR) { | |
695 | struct mc13783_regulator_platform_data regulator_pdata = { | |
696 | .num_regulators = pdata->num_regulators, | |
697 | .regulators = pdata->regulators, | |
698 | }; | |
699 | ||
700 | mc13783_add_subdevice_pdata(mc13783, "mc13783-regulator", | |
701 | ®ulator_pdata, sizeof(regulator_pdata)); | |
8238addc SH |
702 | } |
703 | ||
9e272677 UKK |
704 | if (pdata->flags & MC13783_USE_RTC) |
705 | mc13783_add_subdevice(mc13783, "mc13783-rtc"); | |
8238addc | 706 | |
9e272677 UKK |
707 | if (pdata->flags & MC13783_USE_TOUCHSCREEN) |
708 | mc13783_add_subdevice(mc13783, "mc13783-ts"); | |
8238addc | 709 | |
7fdcef8a PR |
710 | if (pdata->flags & MC13783_USE_LED) |
711 | mc13783_add_subdevice_pdata(mc13783, "mc13783-led", | |
712 | pdata->leds, sizeof(*pdata->leds)); | |
713 | ||
8238addc | 714 | return 0; |
8238addc SH |
715 | } |
716 | ||
717 | static int __devexit mc13783_remove(struct spi_device *spi) | |
718 | { | |
9e272677 | 719 | struct mc13783 *mc13783 = dev_get_drvdata(&spi->dev); |
8238addc | 720 | |
9e272677 | 721 | free_irq(mc13783->spidev->irq, mc13783); |
8238addc SH |
722 | |
723 | mfd_remove_devices(&spi->dev); | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
9e272677 | 728 | static struct spi_driver mc13783_driver = { |
8238addc | 729 | .driver = { |
9e272677 UKK |
730 | .name = "mc13783", |
731 | .bus = &spi_bus_type, | |
732 | .owner = THIS_MODULE, | |
8238addc SH |
733 | }, |
734 | .probe = mc13783_probe, | |
735 | .remove = __devexit_p(mc13783_remove), | |
736 | }; | |
737 | ||
9e272677 | 738 | static int __init mc13783_init(void) |
8238addc | 739 | { |
9e272677 | 740 | return spi_register_driver(&mc13783_driver); |
8238addc | 741 | } |
9e272677 | 742 | subsys_initcall(mc13783_init); |
8238addc | 743 | |
9e272677 | 744 | static void __exit mc13783_exit(void) |
8238addc | 745 | { |
9e272677 | 746 | spi_unregister_driver(&mc13783_driver); |
8238addc | 747 | } |
9e272677 | 748 | module_exit(mc13783_exit); |
8238addc | 749 | |
9e272677 UKK |
750 | MODULE_DESCRIPTION("Core driver for Freescale MC13783 PMIC"); |
751 | MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>"); | |
752 | MODULE_LICENSE("GPL v2"); |