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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-09-11 05:26:31 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-09-11 05:26:31 -0400
commit05c45ca9aa4ec57e8e22341633c7a98cc879423d (patch)
treed741028790d6f0b3ede6eb7e4e0632259d5aa4d3
parent2f79f458d2ab4a77f1b9df8d0041e51ce085d7c0 (diff)
[MFD] Add code UCB1200/UCB1300 device support
Add the core device support code for the Philips UCB1200 and UCB1300 devices. Also includes the following from Pavel: This fixes u32 vs. pm_message_t confusion and uses cleaner try_to_freeze() [fixing compilation as a side-effect on newer kernels.] Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat
-rw-r--r--drivers/mfd/Kconfig5
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/ucb1x00-core.c665
-rw-r--r--drivers/mfd/ucb1x00.h256
4 files changed, 927 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1588a59e3767..1f8563bde4a9 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -13,4 +13,9 @@ config MCP_SA11X0
13 depends on ARCH_SA1100 13 depends on ARCH_SA1100
14 select MCP 14 select MCP
15 15
16# Chip drivers
17config MCP_UCB1200
18 tristate "Support for UCB1200 / UCB1300"
19 depends on MCP
20
16endmenu 21endmenu
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 98bdd6a42188..90815b284021 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -4,3 +4,4 @@
4 4
5obj-$(CONFIG_MCP) += mcp-core.o 5obj-$(CONFIG_MCP) += mcp-core.o
6obj-$(CONFIG_MCP_SA11X0) += mcp-sa11x0.o 6obj-$(CONFIG_MCP_SA11X0) += mcp-sa11x0.o
7obj-$(CONFIG_MCP_UCB1200) += ucb1x00-core.o
diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c
new file mode 100644
index 000000000000..10f6ce1bc0ab
--- /dev/null
+++ b/drivers/mfd/ucb1x00-core.c
@@ -0,0 +1,665 @@
1/*
2 * linux/drivers/mfd/ucb1x00-core.c
3 *
4 * Copyright (C) 2001 Russell King, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
9 *
10 * The UCB1x00 core driver provides basic services for handling IO,
11 * the ADC, interrupts, and accessing registers. It is designed
12 * such that everything goes through this layer, thereby providing
13 * a consistent locking methodology, as well as allowing the drivers
14 * to be used on other non-MCP-enabled hardware platforms.
15 *
16 * Note that all locks are private to this file. Nothing else may
17 * touch them.
18 */
19#include <linux/config.h>
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/init.h>
24#include <linux/errno.h>
25#include <linux/interrupt.h>
26#include <linux/device.h>
27
28#include <asm/dma.h>
29#include <asm/hardware.h>
30#include <asm/irq.h>
31
32#include "ucb1x00.h"
33
34static DECLARE_MUTEX(ucb1x00_sem);
35static LIST_HEAD(ucb1x00_drivers);
36static LIST_HEAD(ucb1x00_devices);
37
38/**
39 * ucb1x00_io_set_dir - set IO direction
40 * @ucb: UCB1x00 structure describing chip
41 * @in: bitfield of IO pins to be set as inputs
42 * @out: bitfield of IO pins to be set as outputs
43 *
44 * Set the IO direction of the ten general purpose IO pins on
45 * the UCB1x00 chip. The @in bitfield has priority over the
46 * @out bitfield, in that if you specify a pin as both input
47 * and output, it will end up as an input.
48 *
49 * ucb1x00_enable must have been called to enable the comms
50 * before using this function.
51 *
52 * This function takes a spinlock, disabling interrupts.
53 */
54void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int in, unsigned int out)
55{
56 unsigned long flags;
57
58 spin_lock_irqsave(&ucb->io_lock, flags);
59 ucb->io_dir |= out;
60 ucb->io_dir &= ~in;
61
62 ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir);
63 spin_unlock_irqrestore(&ucb->io_lock, flags);
64}
65
66/**
67 * ucb1x00_io_write - set or clear IO outputs
68 * @ucb: UCB1x00 structure describing chip
69 * @set: bitfield of IO pins to set to logic '1'
70 * @clear: bitfield of IO pins to set to logic '0'
71 *
72 * Set the IO output state of the specified IO pins. The value
73 * is retained if the pins are subsequently configured as inputs.
74 * The @clear bitfield has priority over the @set bitfield -
75 * outputs will be cleared.
76 *
77 * ucb1x00_enable must have been called to enable the comms
78 * before using this function.
79 *
80 * This function takes a spinlock, disabling interrupts.
81 */
82void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int set, unsigned int clear)
83{
84 unsigned long flags;
85
86 spin_lock_irqsave(&ucb->io_lock, flags);
87 ucb->io_out |= set;
88 ucb->io_out &= ~clear;
89
90 ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out);
91 spin_unlock_irqrestore(&ucb->io_lock, flags);
92}
93
94/**
95 * ucb1x00_io_read - read the current state of the IO pins
96 * @ucb: UCB1x00 structure describing chip
97 *
98 * Return a bitfield describing the logic state of the ten
99 * general purpose IO pins.
100 *
101 * ucb1x00_enable must have been called to enable the comms
102 * before using this function.
103 *
104 * This function does not take any semaphores or spinlocks.
105 */
106unsigned int ucb1x00_io_read(struct ucb1x00 *ucb)
107{
108 return ucb1x00_reg_read(ucb, UCB_IO_DATA);
109}
110
111/*
112 * UCB1300 data sheet says we must:
113 * 1. enable ADC => 5us (including reference startup time)
114 * 2. select input => 51*tsibclk => 4.3us
115 * 3. start conversion => 102*tsibclk => 8.5us
116 * (tsibclk = 1/11981000)
117 * Period between SIB 128-bit frames = 10.7us
118 */
119
120/**
121 * ucb1x00_adc_enable - enable the ADC converter
122 * @ucb: UCB1x00 structure describing chip
123 *
124 * Enable the ucb1x00 and ADC converter on the UCB1x00 for use.
125 * Any code wishing to use the ADC converter must call this
126 * function prior to using it.
127 *
128 * This function takes the ADC semaphore to prevent two or more
129 * concurrent uses, and therefore may sleep. As a result, it
130 * can only be called from process context, not interrupt
131 * context.
132 *
133 * You should release the ADC as soon as possible using
134 * ucb1x00_adc_disable.
135 */
136void ucb1x00_adc_enable(struct ucb1x00 *ucb)
137{
138 down(&ucb->adc_sem);
139
140 ucb->adc_cr |= UCB_ADC_ENA;
141
142 ucb1x00_enable(ucb);
143 ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr);
144}
145
146/**
147 * ucb1x00_adc_read - read the specified ADC channel
148 * @ucb: UCB1x00 structure describing chip
149 * @adc_channel: ADC channel mask
150 * @sync: wait for syncronisation pulse.
151 *
152 * Start an ADC conversion and wait for the result. Note that
153 * synchronised ADC conversions (via the ADCSYNC pin) must wait
154 * until the trigger is asserted and the conversion is finished.
155 *
156 * This function currently spins waiting for the conversion to
157 * complete (2 frames max without sync).
158 *
159 * If called for a synchronised ADC conversion, it may sleep
160 * with the ADC semaphore held.
161 */
162unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync)
163{
164 unsigned int val;
165
166 if (sync)
167 adc_channel |= UCB_ADC_SYNC_ENA;
168
169 ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel);
170 ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel | UCB_ADC_START);
171
172 for (;;) {
173 val = ucb1x00_reg_read(ucb, UCB_ADC_DATA);
174 if (val & UCB_ADC_DAT_VAL)
175 break;
176 /* yield to other processes */
177 set_current_state(TASK_INTERRUPTIBLE);
178 schedule_timeout(1);
179 }
180
181 return UCB_ADC_DAT(val);
182}
183
184/**
185 * ucb1x00_adc_disable - disable the ADC converter
186 * @ucb: UCB1x00 structure describing chip
187 *
188 * Disable the ADC converter and release the ADC semaphore.
189 */
190void ucb1x00_adc_disable(struct ucb1x00 *ucb)
191{
192 ucb->adc_cr &= ~UCB_ADC_ENA;
193 ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr);
194 ucb1x00_disable(ucb);
195
196 up(&ucb->adc_sem);
197}
198
199/*
200 * UCB1x00 Interrupt handling.
201 *
202 * The UCB1x00 can generate interrupts when the SIBCLK is stopped.
203 * Since we need to read an internal register, we must re-enable
204 * SIBCLK to talk to the chip. We leave the clock running until
205 * we have finished processing all interrupts from the chip.
206 */
207static irqreturn_t ucb1x00_irq(int irqnr, void *devid, struct pt_regs *regs)
208{
209 struct ucb1x00 *ucb = devid;
210 struct ucb1x00_irq *irq;
211 unsigned int isr, i;
212
213 ucb1x00_enable(ucb);
214 isr = ucb1x00_reg_read(ucb, UCB_IE_STATUS);
215 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, isr);
216 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
217
218 for (i = 0, irq = ucb->irq_handler; i < 16 && isr; i++, isr >>= 1, irq++)
219 if (isr & 1 && irq->fn)
220 irq->fn(i, irq->devid);
221 ucb1x00_disable(ucb);
222
223 return IRQ_HANDLED;
224}
225
226/**
227 * ucb1x00_hook_irq - hook a UCB1x00 interrupt
228 * @ucb: UCB1x00 structure describing chip
229 * @idx: interrupt index
230 * @fn: function to call when interrupt is triggered
231 * @devid: device id to pass to interrupt handler
232 *
233 * Hook the specified interrupt. You can only register one handler
234 * for each interrupt source. The interrupt source is not enabled
235 * by this function; use ucb1x00_enable_irq instead.
236 *
237 * Interrupt handlers will be called with other interrupts enabled.
238 *
239 * Returns zero on success, or one of the following errors:
240 * -EINVAL if the interrupt index is invalid
241 * -EBUSY if the interrupt has already been hooked
242 */
243int ucb1x00_hook_irq(struct ucb1x00 *ucb, unsigned int idx, void (*fn)(int, void *), void *devid)
244{
245 struct ucb1x00_irq *irq;
246 int ret = -EINVAL;
247
248 if (idx < 16) {
249 irq = ucb->irq_handler + idx;
250 ret = -EBUSY;
251
252 spin_lock_irq(&ucb->lock);
253 if (irq->fn == NULL) {
254 irq->devid = devid;
255 irq->fn = fn;
256 ret = 0;
257 }
258 spin_unlock_irq(&ucb->lock);
259 }
260 return ret;
261}
262
263/**
264 * ucb1x00_enable_irq - enable an UCB1x00 interrupt source
265 * @ucb: UCB1x00 structure describing chip
266 * @idx: interrupt index
267 * @edges: interrupt edges to enable
268 *
269 * Enable the specified interrupt to trigger on %UCB_RISING,
270 * %UCB_FALLING or both edges. The interrupt should have been
271 * hooked by ucb1x00_hook_irq.
272 */
273void ucb1x00_enable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges)
274{
275 unsigned long flags;
276
277 if (idx < 16) {
278 spin_lock_irqsave(&ucb->lock, flags);
279
280 ucb1x00_enable(ucb);
281 if (edges & UCB_RISING) {
282 ucb->irq_ris_enbl |= 1 << idx;
283 ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
284 }
285 if (edges & UCB_FALLING) {
286 ucb->irq_fal_enbl |= 1 << idx;
287 ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
288 }
289 ucb1x00_disable(ucb);
290 spin_unlock_irqrestore(&ucb->lock, flags);
291 }
292}
293
294/**
295 * ucb1x00_disable_irq - disable an UCB1x00 interrupt source
296 * @ucb: UCB1x00 structure describing chip
297 * @edges: interrupt edges to disable
298 *
299 * Disable the specified interrupt triggering on the specified
300 * (%UCB_RISING, %UCB_FALLING or both) edges.
301 */
302void ucb1x00_disable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges)
303{
304 unsigned long flags;
305
306 if (idx < 16) {
307 spin_lock_irqsave(&ucb->lock, flags);
308
309 ucb1x00_enable(ucb);
310 if (edges & UCB_RISING) {
311 ucb->irq_ris_enbl &= ~(1 << idx);
312 ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
313 }
314 if (edges & UCB_FALLING) {
315 ucb->irq_fal_enbl &= ~(1 << idx);
316 ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
317 }
318 ucb1x00_disable(ucb);
319 spin_unlock_irqrestore(&ucb->lock, flags);
320 }
321}
322
323/**
324 * ucb1x00_free_irq - disable and free the specified UCB1x00 interrupt
325 * @ucb: UCB1x00 structure describing chip
326 * @idx: interrupt index
327 * @devid: device id.
328 *
329 * Disable the interrupt source and remove the handler. devid must
330 * match the devid passed when hooking the interrupt.
331 *
332 * Returns zero on success, or one of the following errors:
333 * -EINVAL if the interrupt index is invalid
334 * -ENOENT if devid does not match
335 */
336int ucb1x00_free_irq(struct ucb1x00 *ucb, unsigned int idx, void *devid)
337{
338 struct ucb1x00_irq *irq;
339 int ret;
340
341 if (idx >= 16)
342 goto bad;
343
344 irq = ucb->irq_handler + idx;
345 ret = -ENOENT;
346
347 spin_lock_irq(&ucb->lock);
348 if (irq->devid == devid) {
349 ucb->irq_ris_enbl &= ~(1 << idx);
350 ucb->irq_fal_enbl &= ~(1 << idx);
351
352 ucb1x00_enable(ucb);
353 ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
354 ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
355 ucb1x00_disable(ucb);
356
357 irq->fn = NULL;
358 irq->devid = NULL;
359 ret = 0;
360 }
361 spin_unlock_irq(&ucb->lock);
362 return ret;
363
364bad:
365 printk(KERN_ERR "Freeing bad UCB1x00 irq %d\n", idx);
366 return -EINVAL;
367}
368
369static int ucb1x00_add_dev(struct ucb1x00 *ucb, struct ucb1x00_driver *drv)
370{
371 struct ucb1x00_dev *dev;
372 int ret = -ENOMEM;
373
374 dev = kmalloc(sizeof(struct ucb1x00_dev), GFP_KERNEL);
375 if (dev) {
376 dev->ucb = ucb;
377 dev->drv = drv;
378
379 ret = drv->add(dev);
380
381 if (ret == 0) {
382 list_add(&dev->dev_node, &ucb->devs);
383 list_add(&dev->drv_node, &drv->devs);
384 } else {
385 kfree(dev);
386 }
387 }
388 return ret;
389}
390
391static void ucb1x00_remove_dev(struct ucb1x00_dev *dev)
392{
393 dev->drv->remove(dev);
394 list_del(&dev->dev_node);
395 list_del(&dev->drv_node);
396 kfree(dev);
397}
398
399/*
400 * Try to probe our interrupt, rather than relying on lots of
401 * hard-coded machine dependencies. For reference, the expected
402 * IRQ mappings are:
403 *
404 * Machine Default IRQ
405 * adsbitsy IRQ_GPCIN4
406 * cerf IRQ_GPIO_UCB1200_IRQ
407 * flexanet IRQ_GPIO_GUI
408 * freebird IRQ_GPIO_FREEBIRD_UCB1300_IRQ
409 * graphicsclient ADS_EXT_IRQ(8)
410 * graphicsmaster ADS_EXT_IRQ(8)
411 * lart LART_IRQ_UCB1200
412 * omnimeter IRQ_GPIO23
413 * pfs168 IRQ_GPIO_UCB1300_IRQ
414 * simpad IRQ_GPIO_UCB1300_IRQ
415 * shannon SHANNON_IRQ_GPIO_IRQ_CODEC
416 * yopy IRQ_GPIO_UCB1200_IRQ
417 */
418static int ucb1x00_detect_irq(struct ucb1x00 *ucb)
419{
420 unsigned long mask;
421
422 mask = probe_irq_on();
423 if (!mask)
424 return NO_IRQ;
425
426 /*
427 * Enable the ADC interrupt.
428 */
429 ucb1x00_reg_write(ucb, UCB_IE_RIS, UCB_IE_ADC);
430 ucb1x00_reg_write(ucb, UCB_IE_FAL, UCB_IE_ADC);
431 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff);
432 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
433
434 /*
435 * Cause an ADC interrupt.
436 */
437 ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA);
438 ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA | UCB_ADC_START);
439
440 /*
441 * Wait for the conversion to complete.
442 */
443 while ((ucb1x00_reg_read(ucb, UCB_ADC_DATA) & UCB_ADC_DAT_VAL) == 0);
444 ucb1x00_reg_write(ucb, UCB_ADC_CR, 0);
445
446 /*
447 * Disable and clear interrupt.
448 */
449 ucb1x00_reg_write(ucb, UCB_IE_RIS, 0);
450 ucb1x00_reg_write(ucb, UCB_IE_FAL, 0);
451 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff);
452 ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
453
454 /*
455 * Read triggered interrupt.
456 */
457 return probe_irq_off(mask);
458}
459
460static int ucb1x00_probe(struct mcp *mcp)
461{
462 struct ucb1x00 *ucb;
463 struct ucb1x00_driver *drv;
464 unsigned int id;
465 int ret = -ENODEV;
466
467 mcp_enable(mcp);
468 id = mcp_reg_read(mcp, UCB_ID);
469
470 if (id != UCB_ID_1200 && id != UCB_ID_1300) {
471 printk(KERN_WARNING "UCB1x00 ID not found: %04x\n", id);
472 goto err_disable;
473 }
474
475 ucb = kmalloc(sizeof(struct ucb1x00), GFP_KERNEL);
476 ret = -ENOMEM;
477 if (!ucb)
478 goto err_disable;
479
480 memset(ucb, 0, sizeof(struct ucb1x00));
481
482 ucb->cdev.class = &ucb1x00_class;
483 ucb->cdev.dev = &mcp->attached_device;
484 strlcpy(ucb->cdev.class_id, "ucb1x00", sizeof(ucb->cdev.class_id));
485
486 spin_lock_init(&ucb->lock);
487 spin_lock_init(&ucb->io_lock);
488 sema_init(&ucb->adc_sem, 1);
489
490 ucb->id = id;
491 ucb->mcp = mcp;
492 ucb->irq = ucb1x00_detect_irq(ucb);
493 if (ucb->irq == NO_IRQ) {
494 printk(KERN_ERR "UCB1x00: IRQ probe failed\n");
495 ret = -ENODEV;
496 goto err_free;
497 }
498
499 ret = request_irq(ucb->irq, ucb1x00_irq, 0, "UCB1x00", ucb);
500 if (ret) {
501 printk(KERN_ERR "ucb1x00: unable to grab irq%d: %d\n",
502 ucb->irq, ret);
503 goto err_free;
504 }
505
506 set_irq_type(ucb->irq, IRQT_RISING);
507 mcp_set_drvdata(mcp, ucb);
508
509 ret = class_device_register(&ucb->cdev);
510 if (ret)
511 goto err_irq;
512
513 INIT_LIST_HEAD(&ucb->devs);
514 down(&ucb1x00_sem);
515 list_add(&ucb->node, &ucb1x00_devices);
516 list_for_each_entry(drv, &ucb1x00_drivers, node) {
517 ucb1x00_add_dev(ucb, drv);
518 }
519 up(&ucb1x00_sem);
520 goto out;
521
522 err_irq:
523 free_irq(ucb->irq, ucb);
524 err_free:
525 kfree(ucb);
526 err_disable:
527 mcp_disable(mcp);
528 out:
529 return ret;
530}
531
532static void ucb1x00_remove(struct mcp *mcp)
533{
534 struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
535 struct list_head *l, *n;
536
537 down(&ucb1x00_sem);
538 list_del(&ucb->node);
539 list_for_each_safe(l, n, &ucb->devs) {
540 struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, dev_node);
541 ucb1x00_remove_dev(dev);
542 }
543 up(&ucb1x00_sem);
544
545 free_irq(ucb->irq, ucb);
546 class_device_unregister(&ucb->cdev);
547}
548
549static void ucb1x00_release(struct class_device *dev)
550{
551 struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);
552 kfree(ucb);
553}
554
555static struct class ucb1x00_class = {
556 .name = "ucb1x00",
557 .release = ucb1x00_release,
558};
559
560int ucb1x00_register_driver(struct ucb1x00_driver *drv)
561{
562 struct ucb1x00 *ucb;
563
564 INIT_LIST_HEAD(&drv->devs);
565 down(&ucb1x00_sem);
566 list_add(&drv->node, &ucb1x00_drivers);
567 list_for_each_entry(ucb, &ucb1x00_devices, node) {
568 ucb1x00_add_dev(ucb, drv);
569 }
570 up(&ucb1x00_sem);
571 return 0;
572}
573
574void ucb1x00_unregister_driver(struct ucb1x00_driver *drv)
575{
576 struct list_head *n, *l;
577
578 down(&ucb1x00_sem);
579 list_del(&drv->node);
580 list_for_each_safe(l, n, &drv->devs) {
581 struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, drv_node);
582 ucb1x00_remove_dev(dev);
583 }
584 up(&ucb1x00_sem);
585}
586
587static int ucb1x00_suspend(struct mcp *mcp, pm_message_t state)
588{
589 struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
590 struct ucb1x00_dev *dev;
591
592 down(&ucb1x00_sem);
593 list_for_each_entry(dev, &ucb->devs, dev_node) {
594 if (dev->drv->suspend)
595 dev->drv->suspend(dev, state);
596 }
597 up(&ucb1x00_sem);
598 return 0;
599}
600
601static int ucb1x00_resume(struct mcp *mcp)
602{
603 struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
604 struct ucb1x00_dev *dev;
605
606 down(&ucb1x00_sem);
607 list_for_each_entry(dev, &ucb->devs, dev_node) {
608 if (dev->drv->resume)
609 dev->drv->resume(dev);
610 }
611 up(&ucb1x00_sem);
612 return 0;
613}
614
615static struct mcp_driver ucb1x00_driver = {
616 .drv = {
617 .name = "ucb1x00",
618 },
619 .probe = ucb1x00_probe,
620 .remove = ucb1x00_remove,
621 .suspend = ucb1x00_suspend,
622 .resume = ucb1x00_resume,
623};
624
625static int __init ucb1x00_init(void)
626{
627 int ret = class_register(&ucb1x00_class);
628 if (ret == 0) {
629 ret = mcp_driver_register(&ucb1x00_driver);
630 if (ret)
631 class_unregister(&ucb1x00_class);
632 }
633 return ret;
634}
635
636static void __exit ucb1x00_exit(void)
637{
638 mcp_driver_unregister(&ucb1x00_driver);
639 class_unregister(&ucb1x00_class);
640}
641
642module_init(ucb1x00_init);
643module_exit(ucb1x00_exit);
644
645EXPORT_SYMBOL(ucb1x00_class);
646
647EXPORT_SYMBOL(ucb1x00_io_set_dir);
648EXPORT_SYMBOL(ucb1x00_io_write);
649EXPORT_SYMBOL(ucb1x00_io_read);
650
651EXPORT_SYMBOL(ucb1x00_adc_enable);
652EXPORT_SYMBOL(ucb1x00_adc_read);
653EXPORT_SYMBOL(ucb1x00_adc_disable);
654
655EXPORT_SYMBOL(ucb1x00_hook_irq);
656EXPORT_SYMBOL(ucb1x00_free_irq);
657EXPORT_SYMBOL(ucb1x00_enable_irq);
658EXPORT_SYMBOL(ucb1x00_disable_irq);
659
660EXPORT_SYMBOL(ucb1x00_register_driver);
661EXPORT_SYMBOL(ucb1x00_unregister_driver);
662
663MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
664MODULE_DESCRIPTION("UCB1x00 core driver");
665MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/ucb1x00.h b/drivers/mfd/ucb1x00.h
new file mode 100644
index 000000000000..6b632644f59a
--- /dev/null
+++ b/drivers/mfd/ucb1x00.h
@@ -0,0 +1,256 @@
1/*
2 * linux/drivers/mfd/ucb1x00.h
3 *
4 * Copyright (C) 2001 Russell King, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
9 */
10#ifndef UCB1200_H
11#define UCB1200_H
12
13#define UCB_IO_DATA 0x00
14#define UCB_IO_DIR 0x01
15
16#define UCB_IO_0 (1 << 0)
17#define UCB_IO_1 (1 << 1)
18#define UCB_IO_2 (1 << 2)
19#define UCB_IO_3 (1 << 3)
20#define UCB_IO_4 (1 << 4)
21#define UCB_IO_5 (1 << 5)
22#define UCB_IO_6 (1 << 6)
23#define UCB_IO_7 (1 << 7)
24#define UCB_IO_8 (1 << 8)
25#define UCB_IO_9 (1 << 9)
26
27#define UCB_IE_RIS 0x02
28#define UCB_IE_FAL 0x03
29#define UCB_IE_STATUS 0x04
30#define UCB_IE_CLEAR 0x04
31#define UCB_IE_ADC (1 << 11)
32#define UCB_IE_TSPX (1 << 12)
33#define UCB_IE_TSMX (1 << 13)
34#define UCB_IE_TCLIP (1 << 14)
35#define UCB_IE_ACLIP (1 << 15)
36
37#define UCB_IRQ_TSPX 12
38
39#define UCB_TC_A 0x05
40#define UCB_TC_A_LOOP (1 << 7) /* UCB1200 */
41#define UCB_TC_A_AMPL (1 << 7) /* UCB1300 */
42
43#define UCB_TC_B 0x06
44#define UCB_TC_B_VOICE_ENA (1 << 3)
45#define UCB_TC_B_CLIP (1 << 4)
46#define UCB_TC_B_ATT (1 << 6)
47#define UCB_TC_B_SIDE_ENA (1 << 11)
48#define UCB_TC_B_MUTE (1 << 13)
49#define UCB_TC_B_IN_ENA (1 << 14)
50#define UCB_TC_B_OUT_ENA (1 << 15)
51
52#define UCB_AC_A 0x07
53#define UCB_AC_B 0x08
54#define UCB_AC_B_LOOP (1 << 8)
55#define UCB_AC_B_MUTE (1 << 13)
56#define UCB_AC_B_IN_ENA (1 << 14)
57#define UCB_AC_B_OUT_ENA (1 << 15)
58
59#define UCB_TS_CR 0x09
60#define UCB_TS_CR_TSMX_POW (1 << 0)
61#define UCB_TS_CR_TSPX_POW (1 << 1)
62#define UCB_TS_CR_TSMY_POW (1 << 2)
63#define UCB_TS_CR_TSPY_POW (1 << 3)
64#define UCB_TS_CR_TSMX_GND (1 << 4)
65#define UCB_TS_CR_TSPX_GND (1 << 5)
66#define UCB_TS_CR_TSMY_GND (1 << 6)
67#define UCB_TS_CR_TSPY_GND (1 << 7)
68#define UCB_TS_CR_MODE_INT (0 << 8)
69#define UCB_TS_CR_MODE_PRES (1 << 8)
70#define UCB_TS_CR_MODE_POS (2 << 8)
71#define UCB_TS_CR_BIAS_ENA (1 << 11)
72#define UCB_TS_CR_TSPX_LOW (1 << 12)
73#define UCB_TS_CR_TSMX_LOW (1 << 13)
74
75#define UCB_ADC_CR 0x0a
76#define UCB_ADC_SYNC_ENA (1 << 0)
77#define UCB_ADC_VREFBYP_CON (1 << 1)
78#define UCB_ADC_INP_TSPX (0 << 2)
79#define UCB_ADC_INP_TSMX (1 << 2)
80#define UCB_ADC_INP_TSPY (2 << 2)
81#define UCB_ADC_INP_TSMY (3 << 2)
82#define UCB_ADC_INP_AD0 (4 << 2)
83#define UCB_ADC_INP_AD1 (5 << 2)
84#define UCB_ADC_INP_AD2 (6 << 2)
85#define UCB_ADC_INP_AD3 (7 << 2)
86#define UCB_ADC_EXT_REF (1 << 5)
87#define UCB_ADC_START (1 << 7)
88#define UCB_ADC_ENA (1 << 15)
89
90#define UCB_ADC_DATA 0x0b
91#define UCB_ADC_DAT_VAL (1 << 15)
92#define UCB_ADC_DAT(x) (((x) & 0x7fe0) >> 5)
93
94#define UCB_ID 0x0c
95#define UCB_ID_1200 0x1004
96#define UCB_ID_1300 0x1005
97
98#define UCB_MODE 0x0d
99#define UCB_MODE_DYN_VFLAG_ENA (1 << 12)
100#define UCB_MODE_AUD_OFF_CAN (1 << 13)
101
102#include "mcp.h"
103
104struct ucb1x00_irq {
105 void *devid;
106 void (*fn)(int, void *);
107};
108
109extern struct class ucb1x00_class;
110
111struct ucb1x00 {
112 spinlock_t lock;
113 struct mcp *mcp;
114 unsigned int irq;
115 struct semaphore adc_sem;
116 spinlock_t io_lock;
117 u16 id;
118 u16 io_dir;
119 u16 io_out;
120 u16 adc_cr;
121 u16 irq_fal_enbl;
122 u16 irq_ris_enbl;
123 struct ucb1x00_irq irq_handler[16];
124 struct class_device cdev;
125 struct list_head node;
126 struct list_head devs;
127};
128
129struct ucb1x00_driver;
130
131struct ucb1x00_dev {
132 struct list_head dev_node;
133 struct list_head drv_node;
134 struct ucb1x00 *ucb;
135 struct ucb1x00_driver *drv;
136 void *priv;
137};
138
139struct ucb1x00_driver {
140 struct list_head node;
141 struct list_head devs;
142 int (*add)(struct ucb1x00_dev *dev);
143 void (*remove)(struct ucb1x00_dev *dev);
144 int (*suspend)(struct ucb1x00_dev *dev, pm_message_t state);
145 int (*resume)(struct ucb1x00_dev *dev);
146};
147
148#define classdev_to_ucb1x00(cd) container_of(cd, struct ucb1x00, cdev)
149
150int ucb1x00_register_driver(struct ucb1x00_driver *);
151void ucb1x00_unregister_driver(struct ucb1x00_driver *);
152
153/**
154 * ucb1x00_clkrate - return the UCB1x00 SIB clock rate
155 * @ucb: UCB1x00 structure describing chip
156 *
157 * Return the SIB clock rate in Hz.
158 */
159static inline unsigned int ucb1x00_clkrate(struct ucb1x00 *ucb)
160{
161 return mcp_get_sclk_rate(ucb->mcp);
162}
163
164/**
165 * ucb1x00_enable - enable the UCB1x00 SIB clock
166 * @ucb: UCB1x00 structure describing chip
167 *
168 * Enable the SIB clock. This can be called multiple times.
169 */
170static inline void ucb1x00_enable(struct ucb1x00 *ucb)
171{
172 mcp_enable(ucb->mcp);
173}
174
175/**
176 * ucb1x00_disable - disable the UCB1x00 SIB clock
177 * @ucb: UCB1x00 structure describing chip
178 *
179 * Disable the SIB clock. The SIB clock will only be disabled
180 * when the number of ucb1x00_enable calls match the number of
181 * ucb1x00_disable calls.
182 */
183static inline void ucb1x00_disable(struct ucb1x00 *ucb)
184{
185 mcp_disable(ucb->mcp);
186}
187
188/**
189 * ucb1x00_reg_write - write a UCB1x00 register
190 * @ucb: UCB1x00 structure describing chip
191 * @reg: UCB1x00 4-bit register index to write
192 * @val: UCB1x00 16-bit value to write
193 *
194 * Write the UCB1x00 register @reg with value @val. The SIB
195 * clock must be running for this function to return.
196 */
197static inline void ucb1x00_reg_write(struct ucb1x00 *ucb, unsigned int reg, unsigned int val)
198{
199 mcp_reg_write(ucb->mcp, reg, val);
200}
201
202/**
203 * ucb1x00_reg_read - read a UCB1x00 register
204 * @ucb: UCB1x00 structure describing chip
205 * @reg: UCB1x00 4-bit register index to write
206 *
207 * Read the UCB1x00 register @reg and return its value. The SIB
208 * clock must be running for this function to return.
209 */
210static inline unsigned int ucb1x00_reg_read(struct ucb1x00 *ucb, unsigned int reg)
211{
212 return mcp_reg_read(ucb->mcp, reg);
213}
214/**
215 * ucb1x00_set_audio_divisor -
216 * @ucb: UCB1x00 structure describing chip
217 * @div: SIB clock divisor
218 */
219static inline void ucb1x00_set_audio_divisor(struct ucb1x00 *ucb, unsigned int div)
220{
221 mcp_set_audio_divisor(ucb->mcp, div);
222}
223
224/**
225 * ucb1x00_set_telecom_divisor -
226 * @ucb: UCB1x00 structure describing chip
227 * @div: SIB clock divisor
228 */
229static inline void ucb1x00_set_telecom_divisor(struct ucb1x00 *ucb, unsigned int div)
230{
231 mcp_set_telecom_divisor(ucb->mcp, div);
232}
233
234void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int, unsigned int);
235void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int, unsigned int);
236unsigned int ucb1x00_io_read(struct ucb1x00 *ucb);
237
238#define UCB_NOSYNC (0)
239#define UCB_SYNC (1)
240
241unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync);
242void ucb1x00_adc_enable(struct ucb1x00 *ucb);
243void ucb1x00_adc_disable(struct ucb1x00 *ucb);
244
245/*
246 * Which edges of the IRQ do you want to control today?
247 */
248#define UCB_RISING (1 << 0)
249#define UCB_FALLING (1 << 1)
250
251int ucb1x00_hook_irq(struct ucb1x00 *ucb, unsigned int idx, void (*fn)(int, void *), void *devid);
252void ucb1x00_enable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
253void ucb1x00_disable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
254int ucb1x00_free_irq(struct ucb1x00 *ucb, unsigned int idx, void *devid);
255
256#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 22:17:50 -0500