Commit | Line | Data |
---|---|---|
13a09f93 DR |
1 | /* |
2 | * Driver for Motorola PCAP2 as present in EZX phones | |
3 | * | |
4 | * Copyright (C) 2006 Harald Welte <laforge@openezx.org> | |
5 | * Copyright (C) 2009 Daniel Ribeiro <drwyrm@gmail.com> | |
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 version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/irq.h> | |
18 | #include <linux/mfd/ezx-pcap.h> | |
19 | #include <linux/spi/spi.h> | |
b1148fd4 | 20 | #include <linux/gpio.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
13a09f93 DR |
22 | |
23 | #define PCAP_ADC_MAXQ 8 | |
24 | struct pcap_adc_request { | |
25 | u8 bank; | |
26 | u8 ch[2]; | |
27 | u32 flags; | |
28 | void (*callback)(void *, u16[]); | |
29 | void *data; | |
30 | }; | |
31 | ||
32 | struct pcap_adc_sync_request { | |
33 | u16 res[2]; | |
34 | struct completion completion; | |
35 | }; | |
36 | ||
37 | struct pcap_chip { | |
38 | struct spi_device *spi; | |
39 | ||
40 | /* IO */ | |
41 | u32 buf; | |
42 | struct mutex io_mutex; | |
43 | ||
44 | /* IRQ */ | |
45 | unsigned int irq_base; | |
46 | u32 msr; | |
47 | struct work_struct isr_work; | |
48 | struct work_struct msr_work; | |
49 | struct workqueue_struct *workqueue; | |
50 | ||
51 | /* ADC */ | |
52 | struct pcap_adc_request *adc_queue[PCAP_ADC_MAXQ]; | |
53 | u8 adc_head; | |
54 | u8 adc_tail; | |
55 | struct mutex adc_mutex; | |
56 | }; | |
57 | ||
58 | /* IO */ | |
59 | static int ezx_pcap_putget(struct pcap_chip *pcap, u32 *data) | |
60 | { | |
61 | struct spi_transfer t; | |
62 | struct spi_message m; | |
63 | int status; | |
64 | ||
65 | memset(&t, 0, sizeof t); | |
66 | spi_message_init(&m); | |
67 | t.len = sizeof(u32); | |
68 | spi_message_add_tail(&t, &m); | |
69 | ||
70 | pcap->buf = *data; | |
71 | t.tx_buf = (u8 *) &pcap->buf; | |
72 | t.rx_buf = (u8 *) &pcap->buf; | |
73 | status = spi_sync(pcap->spi, &m); | |
74 | ||
75 | if (status == 0) | |
76 | *data = pcap->buf; | |
77 | ||
78 | return status; | |
79 | } | |
80 | ||
81 | int ezx_pcap_write(struct pcap_chip *pcap, u8 reg_num, u32 value) | |
82 | { | |
83 | int ret; | |
84 | ||
85 | mutex_lock(&pcap->io_mutex); | |
86 | value &= PCAP_REGISTER_VALUE_MASK; | |
87 | value |= PCAP_REGISTER_WRITE_OP_BIT | |
88 | | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); | |
89 | ret = ezx_pcap_putget(pcap, &value); | |
90 | mutex_unlock(&pcap->io_mutex); | |
91 | ||
92 | return ret; | |
93 | } | |
94 | EXPORT_SYMBOL_GPL(ezx_pcap_write); | |
95 | ||
96 | int ezx_pcap_read(struct pcap_chip *pcap, u8 reg_num, u32 *value) | |
97 | { | |
98 | int ret; | |
99 | ||
100 | mutex_lock(&pcap->io_mutex); | |
101 | *value = PCAP_REGISTER_READ_OP_BIT | |
102 | | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); | |
103 | ||
104 | ret = ezx_pcap_putget(pcap, value); | |
105 | mutex_unlock(&pcap->io_mutex); | |
106 | ||
107 | return ret; | |
108 | } | |
109 | EXPORT_SYMBOL_GPL(ezx_pcap_read); | |
110 | ||
e9a22635 DR |
111 | int ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val) |
112 | { | |
113 | int ret; | |
114 | u32 tmp = PCAP_REGISTER_READ_OP_BIT | | |
115 | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); | |
116 | ||
117 | mutex_lock(&pcap->io_mutex); | |
118 | ret = ezx_pcap_putget(pcap, &tmp); | |
119 | if (ret) | |
120 | goto out_unlock; | |
121 | ||
122 | tmp &= (PCAP_REGISTER_VALUE_MASK & ~mask); | |
123 | tmp |= (val & mask) | PCAP_REGISTER_WRITE_OP_BIT | | |
124 | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); | |
125 | ||
126 | ret = ezx_pcap_putget(pcap, &tmp); | |
127 | out_unlock: | |
128 | mutex_unlock(&pcap->io_mutex); | |
129 | ||
130 | return ret; | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(ezx_pcap_set_bits); | |
133 | ||
13a09f93 | 134 | /* IRQ */ |
9f7b07d6 | 135 | int irq_to_pcap(struct pcap_chip *pcap, int irq) |
13a09f93 | 136 | { |
9f7b07d6 | 137 | return irq - pcap->irq_base; |
13a09f93 | 138 | } |
9f7b07d6 | 139 | EXPORT_SYMBOL_GPL(irq_to_pcap); |
13a09f93 DR |
140 | |
141 | int pcap_to_irq(struct pcap_chip *pcap, int irq) | |
142 | { | |
143 | return pcap->irq_base + irq; | |
144 | } | |
145 | EXPORT_SYMBOL_GPL(pcap_to_irq); | |
146 | ||
c232f22f | 147 | static void pcap_mask_irq(struct irq_data *d) |
13a09f93 | 148 | { |
c232f22f | 149 | struct pcap_chip *pcap = irq_data_get_irq_chip_data(d); |
13a09f93 | 150 | |
c232f22f | 151 | pcap->msr |= 1 << irq_to_pcap(pcap, d->irq); |
13a09f93 DR |
152 | queue_work(pcap->workqueue, &pcap->msr_work); |
153 | } | |
154 | ||
c232f22f | 155 | static void pcap_unmask_irq(struct irq_data *d) |
13a09f93 | 156 | { |
c232f22f | 157 | struct pcap_chip *pcap = irq_data_get_irq_chip_data(d); |
13a09f93 | 158 | |
c232f22f | 159 | pcap->msr &= ~(1 << irq_to_pcap(pcap, d->irq)); |
13a09f93 DR |
160 | queue_work(pcap->workqueue, &pcap->msr_work); |
161 | } | |
162 | ||
163 | static struct irq_chip pcap_irq_chip = { | |
c232f22f | 164 | .name = "pcap", |
73a6839f | 165 | .irq_disable = pcap_mask_irq, |
c232f22f LB |
166 | .irq_mask = pcap_mask_irq, |
167 | .irq_unmask = pcap_unmask_irq, | |
13a09f93 DR |
168 | }; |
169 | ||
170 | static void pcap_msr_work(struct work_struct *work) | |
171 | { | |
172 | struct pcap_chip *pcap = container_of(work, struct pcap_chip, msr_work); | |
173 | ||
174 | ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr); | |
175 | } | |
176 | ||
177 | static void pcap_isr_work(struct work_struct *work) | |
178 | { | |
179 | struct pcap_chip *pcap = container_of(work, struct pcap_chip, isr_work); | |
180 | struct pcap_platform_data *pdata = pcap->spi->dev.platform_data; | |
181 | u32 msr, isr, int_sel, service; | |
182 | int irq; | |
183 | ||
b1148fd4 DR |
184 | do { |
185 | ezx_pcap_read(pcap, PCAP_REG_MSR, &msr); | |
186 | ezx_pcap_read(pcap, PCAP_REG_ISR, &isr); | |
13a09f93 | 187 | |
b1148fd4 DR |
188 | /* We cant service/ack irqs that are assigned to port 2 */ |
189 | if (!(pdata->config & PCAP_SECOND_PORT)) { | |
190 | ezx_pcap_read(pcap, PCAP_REG_INT_SEL, &int_sel); | |
191 | isr &= ~int_sel; | |
192 | } | |
13a09f93 | 193 | |
b1148fd4 DR |
194 | ezx_pcap_write(pcap, PCAP_REG_MSR, isr | msr); |
195 | ezx_pcap_write(pcap, PCAP_REG_ISR, isr); | |
13a09f93 | 196 | |
b1148fd4 DR |
197 | local_irq_disable(); |
198 | service = isr & ~msr; | |
199 | for (irq = pcap->irq_base; service; service >>= 1, irq++) { | |
73a6839f TG |
200 | if (service & 1) |
201 | generic_handle_irq(irq); | |
13a09f93 | 202 | } |
b1148fd4 DR |
203 | local_irq_enable(); |
204 | ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr); | |
205 | } while (gpio_get_value(irq_to_gpio(pcap->spi->irq))); | |
13a09f93 DR |
206 | } |
207 | ||
208 | static void pcap_irq_handler(unsigned int irq, struct irq_desc *desc) | |
209 | { | |
d5bb1221 | 210 | struct pcap_chip *pcap = irq_get_handler_data(irq); |
13a09f93 | 211 | |
c232f22f | 212 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
13a09f93 DR |
213 | queue_work(pcap->workqueue, &pcap->isr_work); |
214 | return; | |
215 | } | |
216 | ||
217 | /* ADC */ | |
ecd78cbd DR |
218 | void pcap_set_ts_bits(struct pcap_chip *pcap, u32 bits) |
219 | { | |
220 | u32 tmp; | |
221 | ||
222 | mutex_lock(&pcap->adc_mutex); | |
223 | ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); | |
224 | tmp &= ~(PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); | |
225 | tmp |= bits & (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); | |
226 | ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); | |
227 | mutex_unlock(&pcap->adc_mutex); | |
228 | } | |
229 | EXPORT_SYMBOL_GPL(pcap_set_ts_bits); | |
230 | ||
13a09f93 DR |
231 | static void pcap_disable_adc(struct pcap_chip *pcap) |
232 | { | |
233 | u32 tmp; | |
234 | ||
235 | ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); | |
236 | tmp &= ~(PCAP_ADC_ADEN|PCAP_ADC_BATT_I_ADC|PCAP_ADC_BATT_I_POLARITY); | |
237 | ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); | |
238 | } | |
239 | ||
240 | static void pcap_adc_trigger(struct pcap_chip *pcap) | |
241 | { | |
242 | u32 tmp; | |
243 | u8 head; | |
244 | ||
245 | mutex_lock(&pcap->adc_mutex); | |
246 | head = pcap->adc_head; | |
247 | if (!pcap->adc_queue[head]) { | |
248 | /* queue is empty, save power */ | |
249 | pcap_disable_adc(pcap); | |
250 | mutex_unlock(&pcap->adc_mutex); | |
251 | return; | |
252 | } | |
ecd78cbd DR |
253 | /* start conversion on requested bank, save TS_M bits */ |
254 | ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); | |
255 | tmp &= (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); | |
256 | tmp |= pcap->adc_queue[head]->flags | PCAP_ADC_ADEN; | |
13a09f93 DR |
257 | |
258 | if (pcap->adc_queue[head]->bank == PCAP_ADC_BANK_1) | |
259 | tmp |= PCAP_ADC_AD_SEL1; | |
260 | ||
261 | ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); | |
ecd78cbd | 262 | mutex_unlock(&pcap->adc_mutex); |
13a09f93 DR |
263 | ezx_pcap_write(pcap, PCAP_REG_ADR, PCAP_ADR_ASC); |
264 | } | |
265 | ||
266 | static irqreturn_t pcap_adc_irq(int irq, void *_pcap) | |
267 | { | |
268 | struct pcap_chip *pcap = _pcap; | |
269 | struct pcap_adc_request *req; | |
270 | u16 res[2]; | |
271 | u32 tmp; | |
272 | ||
273 | mutex_lock(&pcap->adc_mutex); | |
274 | req = pcap->adc_queue[pcap->adc_head]; | |
275 | ||
e0084aa9 | 276 | if (WARN(!req, "adc irq without pending request\n")) { |
1c90ea2c | 277 | mutex_unlock(&pcap->adc_mutex); |
13a09f93 | 278 | return IRQ_HANDLED; |
1c90ea2c | 279 | } |
13a09f93 DR |
280 | |
281 | /* read requested channels results */ | |
282 | ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); | |
283 | tmp &= ~(PCAP_ADC_ADA1_MASK | PCAP_ADC_ADA2_MASK); | |
284 | tmp |= (req->ch[0] << PCAP_ADC_ADA1_SHIFT); | |
285 | tmp |= (req->ch[1] << PCAP_ADC_ADA2_SHIFT); | |
286 | ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); | |
287 | ezx_pcap_read(pcap, PCAP_REG_ADR, &tmp); | |
288 | res[0] = (tmp & PCAP_ADR_ADD1_MASK) >> PCAP_ADR_ADD1_SHIFT; | |
289 | res[1] = (tmp & PCAP_ADR_ADD2_MASK) >> PCAP_ADR_ADD2_SHIFT; | |
290 | ||
291 | pcap->adc_queue[pcap->adc_head] = NULL; | |
292 | pcap->adc_head = (pcap->adc_head + 1) & (PCAP_ADC_MAXQ - 1); | |
293 | mutex_unlock(&pcap->adc_mutex); | |
294 | ||
295 | /* pass the results and release memory */ | |
296 | req->callback(req->data, res); | |
297 | kfree(req); | |
298 | ||
299 | /* trigger next conversion (if any) on queue */ | |
300 | pcap_adc_trigger(pcap); | |
301 | ||
302 | return IRQ_HANDLED; | |
303 | } | |
304 | ||
305 | int pcap_adc_async(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[], | |
306 | void *callback, void *data) | |
307 | { | |
308 | struct pcap_adc_request *req; | |
309 | ||
310 | /* This will be freed after we have a result */ | |
311 | req = kmalloc(sizeof(struct pcap_adc_request), GFP_KERNEL); | |
312 | if (!req) | |
313 | return -ENOMEM; | |
314 | ||
315 | req->bank = bank; | |
316 | req->flags = flags; | |
317 | req->ch[0] = ch[0]; | |
318 | req->ch[1] = ch[1]; | |
319 | req->callback = callback; | |
320 | req->data = data; | |
321 | ||
322 | mutex_lock(&pcap->adc_mutex); | |
323 | if (pcap->adc_queue[pcap->adc_tail]) { | |
324 | mutex_unlock(&pcap->adc_mutex); | |
325 | kfree(req); | |
326 | return -EBUSY; | |
327 | } | |
328 | pcap->adc_queue[pcap->adc_tail] = req; | |
329 | pcap->adc_tail = (pcap->adc_tail + 1) & (PCAP_ADC_MAXQ - 1); | |
330 | mutex_unlock(&pcap->adc_mutex); | |
331 | ||
332 | /* start conversion */ | |
333 | pcap_adc_trigger(pcap); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | EXPORT_SYMBOL_GPL(pcap_adc_async); | |
338 | ||
339 | static void pcap_adc_sync_cb(void *param, u16 res[]) | |
340 | { | |
341 | struct pcap_adc_sync_request *req = param; | |
342 | ||
343 | req->res[0] = res[0]; | |
344 | req->res[1] = res[1]; | |
345 | complete(&req->completion); | |
346 | } | |
347 | ||
348 | int pcap_adc_sync(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[], | |
349 | u16 res[]) | |
350 | { | |
351 | struct pcap_adc_sync_request sync_data; | |
352 | int ret; | |
353 | ||
354 | init_completion(&sync_data.completion); | |
355 | ret = pcap_adc_async(pcap, bank, flags, ch, pcap_adc_sync_cb, | |
356 | &sync_data); | |
357 | if (ret) | |
358 | return ret; | |
359 | wait_for_completion(&sync_data.completion); | |
360 | res[0] = sync_data.res[0]; | |
361 | res[1] = sync_data.res[1]; | |
362 | ||
363 | return 0; | |
364 | } | |
365 | EXPORT_SYMBOL_GPL(pcap_adc_sync); | |
366 | ||
367 | /* subdevs */ | |
368 | static int pcap_remove_subdev(struct device *dev, void *unused) | |
369 | { | |
370 | platform_device_unregister(to_platform_device(dev)); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static int __devinit pcap_add_subdev(struct pcap_chip *pcap, | |
375 | struct pcap_subdev *subdev) | |
376 | { | |
377 | struct platform_device *pdev; | |
09ff21e0 | 378 | int ret; |
13a09f93 DR |
379 | |
380 | pdev = platform_device_alloc(subdev->name, subdev->id); | |
09ff21e0 AL |
381 | if (!pdev) |
382 | return -ENOMEM; | |
383 | ||
13a09f93 DR |
384 | pdev->dev.parent = &pcap->spi->dev; |
385 | pdev->dev.platform_data = subdev->platform_data; | |
13a09f93 | 386 | |
09ff21e0 AL |
387 | ret = platform_device_add(pdev); |
388 | if (ret) | |
389 | platform_device_put(pdev); | |
390 | ||
391 | return ret; | |
13a09f93 DR |
392 | } |
393 | ||
394 | static int __devexit ezx_pcap_remove(struct spi_device *spi) | |
395 | { | |
396 | struct pcap_chip *pcap = dev_get_drvdata(&spi->dev); | |
397 | struct pcap_platform_data *pdata = spi->dev.platform_data; | |
398 | int i, adc_irq; | |
399 | ||
400 | /* remove all registered subdevs */ | |
401 | device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); | |
402 | ||
403 | /* cleanup ADC */ | |
404 | adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? | |
405 | PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); | |
406 | free_irq(adc_irq, pcap); | |
407 | mutex_lock(&pcap->adc_mutex); | |
408 | for (i = 0; i < PCAP_ADC_MAXQ; i++) | |
409 | kfree(pcap->adc_queue[i]); | |
410 | mutex_unlock(&pcap->adc_mutex); | |
411 | ||
412 | /* cleanup irqchip */ | |
413 | for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) | |
d5bb1221 | 414 | irq_set_chip_and_handler(i, NULL, NULL); |
13a09f93 DR |
415 | |
416 | destroy_workqueue(pcap->workqueue); | |
417 | ||
418 | kfree(pcap); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | static int __devinit ezx_pcap_probe(struct spi_device *spi) | |
424 | { | |
425 | struct pcap_platform_data *pdata = spi->dev.platform_data; | |
426 | struct pcap_chip *pcap; | |
427 | int i, adc_irq; | |
428 | int ret = -ENODEV; | |
429 | ||
430 | /* platform data is required */ | |
431 | if (!pdata) | |
432 | goto ret; | |
433 | ||
434 | pcap = kzalloc(sizeof(*pcap), GFP_KERNEL); | |
435 | if (!pcap) { | |
436 | ret = -ENOMEM; | |
437 | goto ret; | |
438 | } | |
439 | ||
440 | mutex_init(&pcap->io_mutex); | |
441 | mutex_init(&pcap->adc_mutex); | |
442 | INIT_WORK(&pcap->isr_work, pcap_isr_work); | |
443 | INIT_WORK(&pcap->msr_work, pcap_msr_work); | |
444 | dev_set_drvdata(&spi->dev, pcap); | |
445 | ||
446 | /* setup spi */ | |
447 | spi->bits_per_word = 32; | |
448 | spi->mode = SPI_MODE_0 | (pdata->config & PCAP_CS_AH ? SPI_CS_HIGH : 0); | |
449 | ret = spi_setup(spi); | |
450 | if (ret) | |
451 | goto free_pcap; | |
452 | ||
453 | pcap->spi = spi; | |
454 | ||
455 | /* setup irq */ | |
456 | pcap->irq_base = pdata->irq_base; | |
457 | pcap->workqueue = create_singlethread_workqueue("pcapd"); | |
458 | if (!pcap->workqueue) { | |
47dabaee | 459 | ret = -ENOMEM; |
13a09f93 DR |
460 | dev_err(&spi->dev, "cant create pcap thread\n"); |
461 | goto free_pcap; | |
462 | } | |
463 | ||
464 | /* redirect interrupts to AP, except adcdone2 */ | |
465 | if (!(pdata->config & PCAP_SECOND_PORT)) | |
466 | ezx_pcap_write(pcap, PCAP_REG_INT_SEL, | |
467 | (1 << PCAP_IRQ_ADCDONE2)); | |
468 | ||
469 | /* setup irq chip */ | |
470 | for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) { | |
d5bb1221 TG |
471 | irq_set_chip_and_handler(i, &pcap_irq_chip, handle_simple_irq); |
472 | irq_set_chip_data(i, pcap); | |
13a09f93 DR |
473 | #ifdef CONFIG_ARM |
474 | set_irq_flags(i, IRQF_VALID); | |
475 | #else | |
d5bb1221 | 476 | irq_set_noprobe(i); |
13a09f93 DR |
477 | #endif |
478 | } | |
479 | ||
480 | /* mask/ack all PCAP interrupts */ | |
481 | ezx_pcap_write(pcap, PCAP_REG_MSR, PCAP_MASK_ALL_INTERRUPT); | |
482 | ezx_pcap_write(pcap, PCAP_REG_ISR, PCAP_CLEAR_INTERRUPT_REGISTER); | |
483 | pcap->msr = PCAP_MASK_ALL_INTERRUPT; | |
484 | ||
d5bb1221 TG |
485 | irq_set_irq_type(spi->irq, IRQ_TYPE_EDGE_RISING); |
486 | irq_set_handler_data(spi->irq, pcap); | |
487 | irq_set_chained_handler(spi->irq, pcap_irq_handler); | |
488 | irq_set_irq_wake(spi->irq, 1); | |
13a09f93 DR |
489 | |
490 | /* ADC */ | |
491 | adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? | |
492 | PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); | |
493 | ||
494 | ret = request_irq(adc_irq, pcap_adc_irq, 0, "ADC", pcap); | |
495 | if (ret) | |
496 | goto free_irqchip; | |
497 | ||
498 | /* setup subdevs */ | |
499 | for (i = 0; i < pdata->num_subdevs; i++) { | |
500 | ret = pcap_add_subdev(pcap, &pdata->subdevs[i]); | |
501 | if (ret) | |
502 | goto remove_subdevs; | |
503 | } | |
504 | ||
505 | /* board specific quirks */ | |
506 | if (pdata->init) | |
507 | pdata->init(pcap); | |
508 | ||
509 | return 0; | |
510 | ||
511 | remove_subdevs: | |
512 | device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); | |
513 | /* free_adc: */ | |
514 | free_irq(adc_irq, pcap); | |
515 | free_irqchip: | |
516 | for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) | |
d5bb1221 | 517 | irq_set_chip_and_handler(i, NULL, NULL); |
13a09f93 DR |
518 | /* destroy_workqueue: */ |
519 | destroy_workqueue(pcap->workqueue); | |
520 | free_pcap: | |
521 | kfree(pcap); | |
522 | ret: | |
523 | return ret; | |
524 | } | |
525 | ||
526 | static struct spi_driver ezxpcap_driver = { | |
527 | .probe = ezx_pcap_probe, | |
528 | .remove = __devexit_p(ezx_pcap_remove), | |
529 | .driver = { | |
530 | .name = "ezx-pcap", | |
531 | .owner = THIS_MODULE, | |
532 | }, | |
533 | }; | |
534 | ||
535 | static int __init ezx_pcap_init(void) | |
536 | { | |
537 | return spi_register_driver(&ezxpcap_driver); | |
538 | } | |
539 | ||
540 | static void __exit ezx_pcap_exit(void) | |
541 | { | |
542 | spi_unregister_driver(&ezxpcap_driver); | |
543 | } | |
544 | ||
f078237b | 545 | subsys_initcall(ezx_pcap_init); |
13a09f93 DR |
546 | module_exit(ezx_pcap_exit); |
547 | ||
548 | MODULE_LICENSE("GPL"); | |
549 | MODULE_AUTHOR("Daniel Ribeiro / Harald Welte"); | |
550 | MODULE_DESCRIPTION("Motorola PCAP2 ASIC Driver"); | |
e0626e38 | 551 | MODULE_ALIAS("spi:ezx-pcap"); |