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1/*
2 * linux/arch/arm/common/locomo.c
3 *
4 * Sharp LoCoMo support
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 version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This file contains all generic LoCoMo support.
11 *
12 * All initialization functions provided here are intended to be called
13 * from machine specific code with proper arguments when required.
14 *
15 * Based on sa1111.c
16 */
17
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/ioport.h>
24#include <linux/platform_device.h>
25#include <linux/slab.h>
26#include <linux/spinlock.h>
27#include <linux/io.h>
28
29#include <mach/hardware.h>
30#include <asm/irq.h>
31#include <asm/mach/irq.h>
32
33#include <asm/hardware/locomo.h>
34
35/* LoCoMo Interrupts */
36#define IRQ_LOCOMO_KEY (0)
37#define IRQ_LOCOMO_GPIO (1)
38#define IRQ_LOCOMO_LT (2)
39#define IRQ_LOCOMO_SPI (3)
40
41/* M62332 output channel selection */
42#define M62332_EVR_CH 1 /* M62332 volume channel number */
43 /* 0 : CH.1 , 1 : CH. 2 */
44/* DAC send data */
45#define M62332_SLAVE_ADDR 0x4e /* Slave address */
46#define M62332_W_BIT 0x00 /* W bit (0 only) */
47#define M62332_SUB_ADDR 0x00 /* Sub address */
48#define M62332_A_BIT 0x00 /* A bit (0 only) */
49
50/* DAC setup and hold times (expressed in us) */
51#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
52#define DAC_START_SETUP_TIME 5 /* 4.7 us */
53#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
54#define DAC_START_HOLD_TIME 5 /* 4.7 us */
55#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
56#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
57#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
58#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
59#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
60#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
61
62/* the following is the overall data for the locomo chip */
63struct locomo {
64 struct device *dev;
65 unsigned long phys;
66 unsigned int irq;
67 int irq_base;
68 spinlock_t lock;
69 void __iomem *base;
70#ifdef CONFIG_PM
71 void *saved_state;
72#endif
73};
74
75struct locomo_dev_info {
76 unsigned long offset;
77 unsigned long length;
78 unsigned int devid;
79 unsigned int irq[1];
80 const char * name;
81};
82
83/* All the locomo devices. If offset is non-zero, the mapbase for the
84 * locomo_dev will be set to the chip base plus offset. If offset is
85 * zero, then the mapbase for the locomo_dev will be set to zero. An
86 * offset of zero means the device only uses GPIOs or other helper
87 * functions inside this file */
88static struct locomo_dev_info locomo_devices[] = {
89 {
90 .devid = LOCOMO_DEVID_KEYBOARD,
91 .irq = { IRQ_LOCOMO_KEY },
92 .name = "locomo-keyboard",
93 .offset = LOCOMO_KEYBOARD,
94 .length = 16,
95 },
96 {
97 .devid = LOCOMO_DEVID_FRONTLIGHT,
98 .irq = {},
99 .name = "locomo-frontlight",
100 .offset = LOCOMO_FRONTLIGHT,
101 .length = 8,
102
103 },
104 {
105 .devid = LOCOMO_DEVID_BACKLIGHT,
106 .irq = {},
107 .name = "locomo-backlight",
108 .offset = LOCOMO_BACKLIGHT,
109 .length = 8,
110 },
111 {
112 .devid = LOCOMO_DEVID_AUDIO,
113 .irq = {},
114 .name = "locomo-audio",
115 .offset = LOCOMO_AUDIO,
116 .length = 4,
117 },
118 {
119 .devid = LOCOMO_DEVID_LED,
120 .irq = {},
121 .name = "locomo-led",
122 .offset = LOCOMO_LED,
123 .length = 8,
124 },
125 {
126 .devid = LOCOMO_DEVID_UART,
127 .irq = {},
128 .name = "locomo-uart",
129 .offset = 0,
130 .length = 0,
131 },
132 {
133 .devid = LOCOMO_DEVID_SPI,
134 .irq = {},
135 .name = "locomo-spi",
136 .offset = LOCOMO_SPI,
137 .length = 0x30,
138 },
139};
140
141static void locomo_handler(unsigned int irq, struct irq_desc *desc)
142{
143 struct locomo *lchip = irq_get_chip_data(irq);
144 int req, i;
145
146 /* Acknowledge the parent IRQ */
147 desc->irq_data.chip->irq_ack(&desc->irq_data);
148
149 /* check why this interrupt was generated */
150 req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00;
151
152 if (req) {
153 /* generate the next interrupt(s) */
154 irq = lchip->irq_base;
155 for (i = 0; i <= 3; i++, irq++) {
156 if (req & (0x0100 << i)) {
157 generic_handle_irq(irq);
158 }
159
160 }
161 }
162}
163
164static void locomo_ack_irq(struct irq_data *d)
165{
166}
167
168static void locomo_mask_irq(struct irq_data *d)
169{
170 struct locomo *lchip = irq_data_get_irq_chip_data(d);
171 unsigned int r;
172 r = locomo_readl(lchip->base + LOCOMO_ICR);
173 r &= ~(0x0010 << (d->irq - lchip->irq_base));
174 locomo_writel(r, lchip->base + LOCOMO_ICR);
175}
176
177static void locomo_unmask_irq(struct irq_data *d)
178{
179 struct locomo *lchip = irq_data_get_irq_chip_data(d);
180 unsigned int r;
181 r = locomo_readl(lchip->base + LOCOMO_ICR);
182 r |= (0x0010 << (d->irq - lchip->irq_base));
183 locomo_writel(r, lchip->base + LOCOMO_ICR);
184}
185
186static struct irq_chip locomo_chip = {
187 .name = "LOCOMO",
188 .irq_ack = locomo_ack_irq,
189 .irq_mask = locomo_mask_irq,
190 .irq_unmask = locomo_unmask_irq,
191};
192
193static void locomo_setup_irq(struct locomo *lchip)
194{
195 int irq = lchip->irq_base;
196
197 /*
198 * Install handler for IRQ_LOCOMO_HW.
199 */
200 irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
201 irq_set_chip_data(lchip->irq, lchip);
202 irq_set_chained_handler(lchip->irq, locomo_handler);
203
204 /* Install handlers for IRQ_LOCOMO_* */
205 for ( ; irq <= lchip->irq_base + 3; irq++) {
206 irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq);
207 irq_set_chip_data(irq, lchip);
208 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
209 }
210}
211
212
213static void locomo_dev_release(struct device *_dev)
214{
215 struct locomo_dev *dev = LOCOMO_DEV(_dev);
216
217 kfree(dev);
218}
219
220static int
221locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
222{
223 struct locomo_dev *dev;
224 int ret;
225
226 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
227 if (!dev) {
228 ret = -ENOMEM;
229 goto out;
230 }
231
232 /*
233 * If the parent device has a DMA mask associated with it,
234 * propagate it down to the children.
235 */
236 if (lchip->dev->dma_mask) {
237 dev->dma_mask = *lchip->dev->dma_mask;
238 dev->dev.dma_mask = &dev->dma_mask;
239 }
240
241 dev_set_name(&dev->dev, "%s", info->name);
242 dev->devid = info->devid;
243 dev->dev.parent = lchip->dev;
244 dev->dev.bus = &locomo_bus_type;
245 dev->dev.release = locomo_dev_release;
246 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
247
248 if (info->offset)
249 dev->mapbase = lchip->base + info->offset;
250 else
251 dev->mapbase = 0;
252 dev->length = info->length;
253
254 dev->irq[0] = (lchip->irq_base == NO_IRQ) ?
255 NO_IRQ : lchip->irq_base + info->irq[0];
256
257 ret = device_register(&dev->dev);
258 if (ret) {
259 out:
260 kfree(dev);
261 }
262 return ret;
263}
264
265#ifdef CONFIG_PM
266
267struct locomo_save_data {
268 u16 LCM_GPO;
269 u16 LCM_SPICT;
270 u16 LCM_GPE;
271 u16 LCM_ASD;
272 u16 LCM_SPIMD;
273};
274
275static int locomo_suspend(struct platform_device *dev, pm_message_t state)
276{
277 struct locomo *lchip = platform_get_drvdata(dev);
278 struct locomo_save_data *save;
279 unsigned long flags;
280
281 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
282 if (!save)
283 return -ENOMEM;
284
285 lchip->saved_state = save;
286
287 spin_lock_irqsave(&lchip->lock, flags);
288
289 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
290 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
291 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
292 locomo_writel(0x40, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
293 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
294 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
295 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
296 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
297 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
298 locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
299
300 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
301 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
302 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
303
304 if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
305 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
306 else
307 /* 18MHz already enabled, so no wait */
308 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
309
310 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
311 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
312 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
313
314 spin_unlock_irqrestore(&lchip->lock, flags);
315
316 return 0;
317}
318
319static int locomo_resume(struct platform_device *dev)
320{
321 struct locomo *lchip = platform_get_drvdata(dev);
322 struct locomo_save_data *save;
323 unsigned long r;
324 unsigned long flags;
325
326 save = lchip->saved_state;
327 if (!save)
328 return 0;
329
330 spin_lock_irqsave(&lchip->lock, flags);
331
332 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
333 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
334 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
335 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
336 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
337
338 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
339 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
340
341 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
342 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
343 r &= 0xFEFF;
344 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
345 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
346
347 spin_unlock_irqrestore(&lchip->lock, flags);
348
349 lchip->saved_state = NULL;
350 kfree(save);
351
352 return 0;
353}
354#endif
355
356
357/**
358 * locomo_probe - probe for a single LoCoMo chip.
359 * @phys_addr: physical address of device.
360 *
361 * Probe for a LoCoMo chip. This must be called
362 * before any other locomo-specific code.
363 *
364 * Returns:
365 * %-ENODEV device not found.
366 * %-EBUSY physical address already marked in-use.
367 * %0 successful.
368 */
369static int
370__locomo_probe(struct device *me, struct resource *mem, int irq)
371{
372 struct locomo_platform_data *pdata = me->platform_data;
373 struct locomo *lchip;
374 unsigned long r;
375 int i, ret = -ENODEV;
376
377 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
378 if (!lchip)
379 return -ENOMEM;
380
381 spin_lock_init(&lchip->lock);
382
383 lchip->dev = me;
384 dev_set_drvdata(lchip->dev, lchip);
385
386 lchip->phys = mem->start;
387 lchip->irq = irq;
388 lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ;
389
390 /*
391 * Map the whole region. This also maps the
392 * registers for our children.
393 */
394 lchip->base = ioremap(mem->start, PAGE_SIZE);
395 if (!lchip->base) {
396 ret = -ENOMEM;
397 goto out;
398 }
399
400 /* locomo initialize */
401 locomo_writel(0, lchip->base + LOCOMO_ICR);
402 /* KEYBOARD */
403 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
404
405 /* GPIO */
406 locomo_writel(0, lchip->base + LOCOMO_GPO);
407 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
408 , lchip->base + LOCOMO_GPE);
409 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
410 , lchip->base + LOCOMO_GPD);
411 locomo_writel(0, lchip->base + LOCOMO_GIE);
412
413 /* Frontlight */
414 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
415 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
416
417 /* Longtime timer */
418 locomo_writel(0, lchip->base + LOCOMO_LTINT);
419 /* SPI */
420 locomo_writel(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE);
421
422 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
423 r = locomo_readl(lchip->base + LOCOMO_ASD);
424 r |= 0x8000;
425 locomo_writel(r, lchip->base + LOCOMO_ASD);
426
427 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
428 r = locomo_readl(lchip->base + LOCOMO_HSD);
429 r |= 0x8000;
430 locomo_writel(r, lchip->base + LOCOMO_HSD);
431
432 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
433
434 /* XON */
435 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
436 udelay(1000);
437 /* CLK9MEN */
438 r = locomo_readl(lchip->base + LOCOMO_TADC);
439 r |= 0x10;
440 locomo_writel(r, lchip->base + LOCOMO_TADC);
441 udelay(100);
442
443 /* init DAC */
444 r = locomo_readl(lchip->base + LOCOMO_DAC);
445 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
446 locomo_writel(r, lchip->base + LOCOMO_DAC);
447
448 r = locomo_readl(lchip->base + LOCOMO_VER);
449 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
450
451 /*
452 * The interrupt controller must be initialised before any
453 * other device to ensure that the interrupts are available.
454 */
455 if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ)
456 locomo_setup_irq(lchip);
457
458 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
459 locomo_init_one_child(lchip, &locomo_devices[i]);
460 return 0;
461
462 out:
463 kfree(lchip);
464 return ret;
465}
466
467static int locomo_remove_child(struct device *dev, void *data)
468{
469 device_unregister(dev);
470 return 0;
471}
472
473static void __locomo_remove(struct locomo *lchip)
474{
475 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
476
477 if (lchip->irq != NO_IRQ) {
478 irq_set_chained_handler(lchip->irq, NULL);
479 irq_set_handler_data(lchip->irq, NULL);
480 }
481
482 iounmap(lchip->base);
483 kfree(lchip);
484}
485
486static int locomo_probe(struct platform_device *dev)
487{
488 struct resource *mem;
489 int irq;
490
491 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
492 if (!mem)
493 return -EINVAL;
494 irq = platform_get_irq(dev, 0);
495 if (irq < 0)
496 return -ENXIO;
497
498 return __locomo_probe(&dev->dev, mem, irq);
499}
500
501static int locomo_remove(struct platform_device *dev)
502{
503 struct locomo *lchip = platform_get_drvdata(dev);
504
505 if (lchip) {
506 __locomo_remove(lchip);
507 platform_set_drvdata(dev, NULL);
508 }
509
510 return 0;
511}
512
513/*
514 * Not sure if this should be on the system bus or not yet.
515 * We really want some way to register a system device at
516 * the per-machine level, and then have this driver pick
517 * up the registered devices.
518 */
519static struct platform_driver locomo_device_driver = {
520 .probe = locomo_probe,
521 .remove = locomo_remove,
522#ifdef CONFIG_PM
523 .suspend = locomo_suspend,
524 .resume = locomo_resume,
525#endif
526 .driver = {
527 .name = "locomo",
528 },
529};
530
531/*
532 * Get the parent device driver (us) structure
533 * from a child function device
534 */
535static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
536{
537 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
538}
539
540void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
541{
542 struct locomo *lchip = dev_get_drvdata(dev);
543 unsigned long flags;
544 unsigned int r;
545
546 if (!lchip)
547 return;
548
549 spin_lock_irqsave(&lchip->lock, flags);
550
551 r = locomo_readl(lchip->base + LOCOMO_GPD);
552 if (dir)
553 r |= bits;
554 else
555 r &= ~bits;
556 locomo_writel(r, lchip->base + LOCOMO_GPD);
557
558 r = locomo_readl(lchip->base + LOCOMO_GPE);
559 if (dir)
560 r |= bits;
561 else
562 r &= ~bits;
563 locomo_writel(r, lchip->base + LOCOMO_GPE);
564
565 spin_unlock_irqrestore(&lchip->lock, flags);
566}
567EXPORT_SYMBOL(locomo_gpio_set_dir);
568
569int locomo_gpio_read_level(struct device *dev, unsigned int bits)
570{
571 struct locomo *lchip = dev_get_drvdata(dev);
572 unsigned long flags;
573 unsigned int ret;
574
575 if (!lchip)
576 return -ENODEV;
577
578 spin_lock_irqsave(&lchip->lock, flags);
579 ret = locomo_readl(lchip->base + LOCOMO_GPL);
580 spin_unlock_irqrestore(&lchip->lock, flags);
581
582 ret &= bits;
583 return ret;
584}
585EXPORT_SYMBOL(locomo_gpio_read_level);
586
587int locomo_gpio_read_output(struct device *dev, unsigned int bits)
588{
589 struct locomo *lchip = dev_get_drvdata(dev);
590 unsigned long flags;
591 unsigned int ret;
592
593 if (!lchip)
594 return -ENODEV;
595
596 spin_lock_irqsave(&lchip->lock, flags);
597 ret = locomo_readl(lchip->base + LOCOMO_GPO);
598 spin_unlock_irqrestore(&lchip->lock, flags);
599
600 ret &= bits;
601 return ret;
602}
603EXPORT_SYMBOL(locomo_gpio_read_output);
604
605void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
606{
607 struct locomo *lchip = dev_get_drvdata(dev);
608 unsigned long flags;
609 unsigned int r;
610
611 if (!lchip)
612 return;
613
614 spin_lock_irqsave(&lchip->lock, flags);
615
616 r = locomo_readl(lchip->base + LOCOMO_GPO);
617 if (set)
618 r |= bits;
619 else
620 r &= ~bits;
621 locomo_writel(r, lchip->base + LOCOMO_GPO);
622
623 spin_unlock_irqrestore(&lchip->lock, flags);
624}
625EXPORT_SYMBOL(locomo_gpio_write);
626
627static void locomo_m62332_sendbit(void *mapbase, int bit)
628{
629 unsigned int r;
630
631 r = locomo_readl(mapbase + LOCOMO_DAC);
632 r &= ~(LOCOMO_DAC_SCLOEB);
633 locomo_writel(r, mapbase + LOCOMO_DAC);
634 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
635 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
636 r = locomo_readl(mapbase + LOCOMO_DAC);
637 r &= ~(LOCOMO_DAC_SCLOEB);
638 locomo_writel(r, mapbase + LOCOMO_DAC);
639 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
640 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
641
642 if (bit & 1) {
643 r = locomo_readl(mapbase + LOCOMO_DAC);
644 r |= LOCOMO_DAC_SDAOEB;
645 locomo_writel(r, mapbase + LOCOMO_DAC);
646 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
647 } else {
648 r = locomo_readl(mapbase + LOCOMO_DAC);
649 r &= ~(LOCOMO_DAC_SDAOEB);
650 locomo_writel(r, mapbase + LOCOMO_DAC);
651 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
652 }
653
654 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
655 r = locomo_readl(mapbase + LOCOMO_DAC);
656 r |= LOCOMO_DAC_SCLOEB;
657 locomo_writel(r, mapbase + LOCOMO_DAC);
658 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
659 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
660}
661
662void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
663{
664 struct locomo *lchip = locomo_chip_driver(ldev);
665 int i;
666 unsigned char data;
667 unsigned int r;
668 void *mapbase = lchip->base;
669 unsigned long flags;
670
671 spin_lock_irqsave(&lchip->lock, flags);
672
673 /* Start */
674 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
675 r = locomo_readl(mapbase + LOCOMO_DAC);
676 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
677 locomo_writel(r, mapbase + LOCOMO_DAC);
678 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
679 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
680 r = locomo_readl(mapbase + LOCOMO_DAC);
681 r &= ~(LOCOMO_DAC_SDAOEB);
682 locomo_writel(r, mapbase + LOCOMO_DAC);
683 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
684 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
685
686 /* Send slave address and W bit (LSB is W bit) */
687 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
688 for (i = 1; i <= 8; i++) {
689 locomo_m62332_sendbit(mapbase, data >> (8 - i));
690 }
691
692 /* Check A bit */
693 r = locomo_readl(mapbase + LOCOMO_DAC);
694 r &= ~(LOCOMO_DAC_SCLOEB);
695 locomo_writel(r, mapbase + LOCOMO_DAC);
696 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
697 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
698 r = locomo_readl(mapbase + LOCOMO_DAC);
699 r &= ~(LOCOMO_DAC_SDAOEB);
700 locomo_writel(r, mapbase + LOCOMO_DAC);
701 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
702 r = locomo_readl(mapbase + LOCOMO_DAC);
703 r |= LOCOMO_DAC_SCLOEB;
704 locomo_writel(r, mapbase + LOCOMO_DAC);
705 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
706 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
707 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
708 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
709 goto out;
710 }
711
712 /* Send Sub address (LSB is channel select) */
713 /* channel = 0 : ch1 select */
714 /* = 1 : ch2 select */
715 data = M62332_SUB_ADDR + channel;
716 for (i = 1; i <= 8; i++) {
717 locomo_m62332_sendbit(mapbase, data >> (8 - i));
718 }
719
720 /* Check A bit */
721 r = locomo_readl(mapbase + LOCOMO_DAC);
722 r &= ~(LOCOMO_DAC_SCLOEB);
723 locomo_writel(r, mapbase + LOCOMO_DAC);
724 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
725 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
726 r = locomo_readl(mapbase + LOCOMO_DAC);
727 r &= ~(LOCOMO_DAC_SDAOEB);
728 locomo_writel(r, mapbase + LOCOMO_DAC);
729 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
730 r = locomo_readl(mapbase + LOCOMO_DAC);
731 r |= LOCOMO_DAC_SCLOEB;
732 locomo_writel(r, mapbase + LOCOMO_DAC);
733 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
734 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
735 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
736 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
737 goto out;
738 }
739
740 /* Send DAC data */
741 for (i = 1; i <= 8; i++) {
742 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
743 }
744
745 /* Check A bit */
746 r = locomo_readl(mapbase + LOCOMO_DAC);
747 r &= ~(LOCOMO_DAC_SCLOEB);
748 locomo_writel(r, mapbase + LOCOMO_DAC);
749 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
750 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
751 r = locomo_readl(mapbase + LOCOMO_DAC);
752 r &= ~(LOCOMO_DAC_SDAOEB);
753 locomo_writel(r, mapbase + LOCOMO_DAC);
754 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
755 r = locomo_readl(mapbase + LOCOMO_DAC);
756 r |= LOCOMO_DAC_SCLOEB;
757 locomo_writel(r, mapbase + LOCOMO_DAC);
758 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
759 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
760 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
761 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
762 }
763
764out:
765 /* stop */
766 r = locomo_readl(mapbase + LOCOMO_DAC);
767 r &= ~(LOCOMO_DAC_SCLOEB);
768 locomo_writel(r, mapbase + LOCOMO_DAC);
769 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
770 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
771 r = locomo_readl(mapbase + LOCOMO_DAC);
772 r |= LOCOMO_DAC_SCLOEB;
773 locomo_writel(r, mapbase + LOCOMO_DAC);
774 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
775 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
776 r = locomo_readl(mapbase + LOCOMO_DAC);
777 r |= LOCOMO_DAC_SDAOEB;
778 locomo_writel(r, mapbase + LOCOMO_DAC);
779 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
780 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
781
782 r = locomo_readl(mapbase + LOCOMO_DAC);
783 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
784 locomo_writel(r, mapbase + LOCOMO_DAC);
785 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
786 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
787
788 spin_unlock_irqrestore(&lchip->lock, flags);
789}
790EXPORT_SYMBOL(locomo_m62332_senddata);
791
792/*
793 * Frontlight control
794 */
795
796void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
797{
798 unsigned long flags;
799 struct locomo *lchip = locomo_chip_driver(dev);
800
801 if (vr)
802 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
803 else
804 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
805
806 spin_lock_irqsave(&lchip->lock, flags);
807 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
808 udelay(100);
809 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
810 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
811 spin_unlock_irqrestore(&lchip->lock, flags);
812}
813EXPORT_SYMBOL(locomo_frontlight_set);
814
815/*
816 * LoCoMo "Register Access Bus."
817 *
818 * We model this as a regular bus type, and hang devices directly
819 * off this.
820 */
821static int locomo_match(struct device *_dev, struct device_driver *_drv)
822{
823 struct locomo_dev *dev = LOCOMO_DEV(_dev);
824 struct locomo_driver *drv = LOCOMO_DRV(_drv);
825
826 return dev->devid == drv->devid;
827}
828
829static int locomo_bus_suspend(struct device *dev, pm_message_t state)
830{
831 struct locomo_dev *ldev = LOCOMO_DEV(dev);
832 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
833 int ret = 0;
834
835 if (drv && drv->suspend)
836 ret = drv->suspend(ldev, state);
837 return ret;
838}
839
840static int locomo_bus_resume(struct device *dev)
841{
842 struct locomo_dev *ldev = LOCOMO_DEV(dev);
843 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
844 int ret = 0;
845
846 if (drv && drv->resume)
847 ret = drv->resume(ldev);
848 return ret;
849}
850
851static int locomo_bus_probe(struct device *dev)
852{
853 struct locomo_dev *ldev = LOCOMO_DEV(dev);
854 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
855 int ret = -ENODEV;
856
857 if (drv->probe)
858 ret = drv->probe(ldev);
859 return ret;
860}
861
862static int locomo_bus_remove(struct device *dev)
863{
864 struct locomo_dev *ldev = LOCOMO_DEV(dev);
865 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
866 int ret = 0;
867
868 if (drv->remove)
869 ret = drv->remove(ldev);
870 return ret;
871}
872
873struct bus_type locomo_bus_type = {
874 .name = "locomo-bus",
875 .match = locomo_match,
876 .probe = locomo_bus_probe,
877 .remove = locomo_bus_remove,
878 .suspend = locomo_bus_suspend,
879 .resume = locomo_bus_resume,
880};
881
882int locomo_driver_register(struct locomo_driver *driver)
883{
884 driver->drv.bus = &locomo_bus_type;
885 return driver_register(&driver->drv);
886}
887EXPORT_SYMBOL(locomo_driver_register);
888
889void locomo_driver_unregister(struct locomo_driver *driver)
890{
891 driver_unregister(&driver->drv);
892}
893EXPORT_SYMBOL(locomo_driver_unregister);
894
895static int __init locomo_init(void)
896{
897 int ret = bus_register(&locomo_bus_type);
898 if (ret == 0)
899 platform_driver_register(&locomo_device_driver);
900 return ret;
901}
902
903static void __exit locomo_exit(void)
904{
905 platform_driver_unregister(&locomo_device_driver);
906 bus_unregister(&locomo_bus_type);
907}
908
909module_init(locomo_init);
910module_exit(locomo_exit);
911
912MODULE_DESCRIPTION("Sharp LoCoMo core driver");
913MODULE_LICENSE("GPL");
914MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/common/locomo.c
4 *
5 * Sharp LoCoMo support
6 *
7 * This file contains all generic LoCoMo support.
8 *
9 * All initialization functions provided here are intended to be called
10 * from machine specific code with proper arguments when required.
11 *
12 * Based on sa1111.c
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/delay.h>
19#include <linux/errno.h>
20#include <linux/ioport.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23#include <linux/spinlock.h>
24#include <linux/io.h>
25
26#include <asm/irq.h>
27#include <asm/mach/irq.h>
28
29#include <asm/hardware/locomo.h>
30
31/* LoCoMo Interrupts */
32#define IRQ_LOCOMO_KEY (0)
33#define IRQ_LOCOMO_GPIO (1)
34#define IRQ_LOCOMO_LT (2)
35#define IRQ_LOCOMO_SPI (3)
36
37/* M62332 output channel selection */
38#define M62332_EVR_CH 1 /* M62332 volume channel number */
39 /* 0 : CH.1 , 1 : CH. 2 */
40/* DAC send data */
41#define M62332_SLAVE_ADDR 0x4e /* Slave address */
42#define M62332_W_BIT 0x00 /* W bit (0 only) */
43#define M62332_SUB_ADDR 0x00 /* Sub address */
44#define M62332_A_BIT 0x00 /* A bit (0 only) */
45
46/* DAC setup and hold times (expressed in us) */
47#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
48#define DAC_START_SETUP_TIME 5 /* 4.7 us */
49#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
50#define DAC_START_HOLD_TIME 5 /* 4.7 us */
51#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
52#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
53#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
54#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
55#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
56#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
57
58/* the following is the overall data for the locomo chip */
59struct locomo {
60 struct device *dev;
61 unsigned long phys;
62 unsigned int irq;
63 int irq_base;
64 spinlock_t lock;
65 void __iomem *base;
66#ifdef CONFIG_PM
67 void *saved_state;
68#endif
69};
70
71struct locomo_dev_info {
72 unsigned long offset;
73 unsigned long length;
74 unsigned int devid;
75 unsigned int irq[1];
76 const char * name;
77};
78
79/* All the locomo devices. If offset is non-zero, the mapbase for the
80 * locomo_dev will be set to the chip base plus offset. If offset is
81 * zero, then the mapbase for the locomo_dev will be set to zero. An
82 * offset of zero means the device only uses GPIOs or other helper
83 * functions inside this file */
84static struct locomo_dev_info locomo_devices[] = {
85 {
86 .devid = LOCOMO_DEVID_KEYBOARD,
87 .irq = { IRQ_LOCOMO_KEY },
88 .name = "locomo-keyboard",
89 .offset = LOCOMO_KEYBOARD,
90 .length = 16,
91 },
92 {
93 .devid = LOCOMO_DEVID_FRONTLIGHT,
94 .irq = {},
95 .name = "locomo-frontlight",
96 .offset = LOCOMO_FRONTLIGHT,
97 .length = 8,
98
99 },
100 {
101 .devid = LOCOMO_DEVID_BACKLIGHT,
102 .irq = {},
103 .name = "locomo-backlight",
104 .offset = LOCOMO_BACKLIGHT,
105 .length = 8,
106 },
107 {
108 .devid = LOCOMO_DEVID_AUDIO,
109 .irq = {},
110 .name = "locomo-audio",
111 .offset = LOCOMO_AUDIO,
112 .length = 4,
113 },
114 {
115 .devid = LOCOMO_DEVID_LED,
116 .irq = {},
117 .name = "locomo-led",
118 .offset = LOCOMO_LED,
119 .length = 8,
120 },
121 {
122 .devid = LOCOMO_DEVID_UART,
123 .irq = {},
124 .name = "locomo-uart",
125 .offset = 0,
126 .length = 0,
127 },
128 {
129 .devid = LOCOMO_DEVID_SPI,
130 .irq = {},
131 .name = "locomo-spi",
132 .offset = LOCOMO_SPI,
133 .length = 0x30,
134 },
135};
136
137static void locomo_handler(struct irq_desc *desc)
138{
139 struct locomo *lchip = irq_desc_get_handler_data(desc);
140 int req, i;
141
142 /* Acknowledge the parent IRQ */
143 desc->irq_data.chip->irq_ack(&desc->irq_data);
144
145 /* check why this interrupt was generated */
146 req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00;
147
148 if (req) {
149 unsigned int irq;
150
151 /* generate the next interrupt(s) */
152 irq = lchip->irq_base;
153 for (i = 0; i <= 3; i++, irq++) {
154 if (req & (0x0100 << i)) {
155 generic_handle_irq(irq);
156 }
157
158 }
159 }
160}
161
162static void locomo_ack_irq(struct irq_data *d)
163{
164}
165
166static void locomo_mask_irq(struct irq_data *d)
167{
168 struct locomo *lchip = irq_data_get_irq_chip_data(d);
169 unsigned int r;
170 r = locomo_readl(lchip->base + LOCOMO_ICR);
171 r &= ~(0x0010 << (d->irq - lchip->irq_base));
172 locomo_writel(r, lchip->base + LOCOMO_ICR);
173}
174
175static void locomo_unmask_irq(struct irq_data *d)
176{
177 struct locomo *lchip = irq_data_get_irq_chip_data(d);
178 unsigned int r;
179 r = locomo_readl(lchip->base + LOCOMO_ICR);
180 r |= (0x0010 << (d->irq - lchip->irq_base));
181 locomo_writel(r, lchip->base + LOCOMO_ICR);
182}
183
184static struct irq_chip locomo_chip = {
185 .name = "LOCOMO",
186 .irq_ack = locomo_ack_irq,
187 .irq_mask = locomo_mask_irq,
188 .irq_unmask = locomo_unmask_irq,
189};
190
191static void locomo_setup_irq(struct locomo *lchip)
192{
193 int irq = lchip->irq_base;
194
195 /*
196 * Install handler for IRQ_LOCOMO_HW.
197 */
198 irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
199 irq_set_chained_handler_and_data(lchip->irq, locomo_handler, lchip);
200
201 /* Install handlers for IRQ_LOCOMO_* */
202 for ( ; irq <= lchip->irq_base + 3; irq++) {
203 irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq);
204 irq_set_chip_data(irq, lchip);
205 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
206 }
207}
208
209
210static void locomo_dev_release(struct device *_dev)
211{
212 struct locomo_dev *dev = LOCOMO_DEV(_dev);
213
214 kfree(dev);
215}
216
217static int
218locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
219{
220 struct locomo_dev *dev;
221 int ret;
222
223 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
224 if (!dev) {
225 ret = -ENOMEM;
226 goto out;
227 }
228
229 /*
230 * If the parent device has a DMA mask associated with it,
231 * propagate it down to the children.
232 */
233 if (lchip->dev->dma_mask) {
234 dev->dma_mask = *lchip->dev->dma_mask;
235 dev->dev.dma_mask = &dev->dma_mask;
236 }
237
238 dev_set_name(&dev->dev, "%s", info->name);
239 dev->devid = info->devid;
240 dev->dev.parent = lchip->dev;
241 dev->dev.bus = &locomo_bus_type;
242 dev->dev.release = locomo_dev_release;
243 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
244
245 if (info->offset)
246 dev->mapbase = lchip->base + info->offset;
247 else
248 dev->mapbase = 0;
249 dev->length = info->length;
250
251 dev->irq[0] = (lchip->irq_base == NO_IRQ) ?
252 NO_IRQ : lchip->irq_base + info->irq[0];
253
254 ret = device_register(&dev->dev);
255 if (ret) {
256 out:
257 kfree(dev);
258 }
259 return ret;
260}
261
262#ifdef CONFIG_PM
263
264struct locomo_save_data {
265 u16 LCM_GPO;
266 u16 LCM_SPICT;
267 u16 LCM_GPE;
268 u16 LCM_ASD;
269 u16 LCM_SPIMD;
270};
271
272static int locomo_suspend(struct platform_device *dev, pm_message_t state)
273{
274 struct locomo *lchip = platform_get_drvdata(dev);
275 struct locomo_save_data *save;
276 unsigned long flags;
277
278 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
279 if (!save)
280 return -ENOMEM;
281
282 lchip->saved_state = save;
283
284 spin_lock_irqsave(&lchip->lock, flags);
285
286 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
287 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
288 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
289 locomo_writel(0x40, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
290 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
291 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
292 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
293 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
294 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
295 locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
296
297 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
298 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
299 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
300
301 if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
302 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
303 else
304 /* 18MHz already enabled, so no wait */
305 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
306
307 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
308 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
309 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
310
311 spin_unlock_irqrestore(&lchip->lock, flags);
312
313 return 0;
314}
315
316static int locomo_resume(struct platform_device *dev)
317{
318 struct locomo *lchip = platform_get_drvdata(dev);
319 struct locomo_save_data *save;
320 unsigned long r;
321 unsigned long flags;
322
323 save = lchip->saved_state;
324 if (!save)
325 return 0;
326
327 spin_lock_irqsave(&lchip->lock, flags);
328
329 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
330 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
331 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
332 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
333 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
334
335 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
336 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
337
338 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
339 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
340 r &= 0xFEFF;
341 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
342 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
343
344 spin_unlock_irqrestore(&lchip->lock, flags);
345
346 lchip->saved_state = NULL;
347 kfree(save);
348
349 return 0;
350}
351#endif
352
353
354/**
355 * locomo_probe - probe for a single LoCoMo chip.
356 * @phys_addr: physical address of device.
357 *
358 * Probe for a LoCoMo chip. This must be called
359 * before any other locomo-specific code.
360 *
361 * Returns:
362 * %-ENODEV device not found.
363 * %-EBUSY physical address already marked in-use.
364 * %0 successful.
365 */
366static int
367__locomo_probe(struct device *me, struct resource *mem, int irq)
368{
369 struct locomo_platform_data *pdata = me->platform_data;
370 struct locomo *lchip;
371 unsigned long r;
372 int i, ret = -ENODEV;
373
374 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
375 if (!lchip)
376 return -ENOMEM;
377
378 spin_lock_init(&lchip->lock);
379
380 lchip->dev = me;
381 dev_set_drvdata(lchip->dev, lchip);
382
383 lchip->phys = mem->start;
384 lchip->irq = irq;
385 lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ;
386
387 /*
388 * Map the whole region. This also maps the
389 * registers for our children.
390 */
391 lchip->base = ioremap(mem->start, PAGE_SIZE);
392 if (!lchip->base) {
393 ret = -ENOMEM;
394 goto out;
395 }
396
397 /* locomo initialize */
398 locomo_writel(0, lchip->base + LOCOMO_ICR);
399 /* KEYBOARD */
400 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
401
402 /* GPIO */
403 locomo_writel(0, lchip->base + LOCOMO_GPO);
404 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
405 , lchip->base + LOCOMO_GPE);
406 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
407 , lchip->base + LOCOMO_GPD);
408 locomo_writel(0, lchip->base + LOCOMO_GIE);
409
410 /* Frontlight */
411 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
412 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
413
414 /* Longtime timer */
415 locomo_writel(0, lchip->base + LOCOMO_LTINT);
416 /* SPI */
417 locomo_writel(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE);
418
419 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
420 r = locomo_readl(lchip->base + LOCOMO_ASD);
421 r |= 0x8000;
422 locomo_writel(r, lchip->base + LOCOMO_ASD);
423
424 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
425 r = locomo_readl(lchip->base + LOCOMO_HSD);
426 r |= 0x8000;
427 locomo_writel(r, lchip->base + LOCOMO_HSD);
428
429 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
430
431 /* XON */
432 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
433 udelay(1000);
434 /* CLK9MEN */
435 r = locomo_readl(lchip->base + LOCOMO_TADC);
436 r |= 0x10;
437 locomo_writel(r, lchip->base + LOCOMO_TADC);
438 udelay(100);
439
440 /* init DAC */
441 r = locomo_readl(lchip->base + LOCOMO_DAC);
442 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
443 locomo_writel(r, lchip->base + LOCOMO_DAC);
444
445 r = locomo_readl(lchip->base + LOCOMO_VER);
446 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
447
448 /*
449 * The interrupt controller must be initialised before any
450 * other device to ensure that the interrupts are available.
451 */
452 if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ)
453 locomo_setup_irq(lchip);
454
455 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
456 locomo_init_one_child(lchip, &locomo_devices[i]);
457 return 0;
458
459 out:
460 kfree(lchip);
461 return ret;
462}
463
464static int locomo_remove_child(struct device *dev, void *data)
465{
466 device_unregister(dev);
467 return 0;
468}
469
470static void __locomo_remove(struct locomo *lchip)
471{
472 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
473
474 if (lchip->irq != NO_IRQ) {
475 irq_set_chained_handler_and_data(lchip->irq, NULL, NULL);
476 }
477
478 iounmap(lchip->base);
479 kfree(lchip);
480}
481
482static int locomo_probe(struct platform_device *dev)
483{
484 struct resource *mem;
485 int irq;
486
487 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
488 if (!mem)
489 return -EINVAL;
490 irq = platform_get_irq(dev, 0);
491 if (irq < 0)
492 return -ENXIO;
493
494 return __locomo_probe(&dev->dev, mem, irq);
495}
496
497static int locomo_remove(struct platform_device *dev)
498{
499 struct locomo *lchip = platform_get_drvdata(dev);
500
501 if (lchip) {
502 __locomo_remove(lchip);
503 platform_set_drvdata(dev, NULL);
504 }
505
506 return 0;
507}
508
509/*
510 * Not sure if this should be on the system bus or not yet.
511 * We really want some way to register a system device at
512 * the per-machine level, and then have this driver pick
513 * up the registered devices.
514 */
515static struct platform_driver locomo_device_driver = {
516 .probe = locomo_probe,
517 .remove = locomo_remove,
518#ifdef CONFIG_PM
519 .suspend = locomo_suspend,
520 .resume = locomo_resume,
521#endif
522 .driver = {
523 .name = "locomo",
524 },
525};
526
527/*
528 * Get the parent device driver (us) structure
529 * from a child function device
530 */
531static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
532{
533 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
534}
535
536void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
537{
538 struct locomo *lchip = dev_get_drvdata(dev);
539 unsigned long flags;
540 unsigned int r;
541
542 if (!lchip)
543 return;
544
545 spin_lock_irqsave(&lchip->lock, flags);
546
547 r = locomo_readl(lchip->base + LOCOMO_GPD);
548 if (dir)
549 r |= bits;
550 else
551 r &= ~bits;
552 locomo_writel(r, lchip->base + LOCOMO_GPD);
553
554 r = locomo_readl(lchip->base + LOCOMO_GPE);
555 if (dir)
556 r |= bits;
557 else
558 r &= ~bits;
559 locomo_writel(r, lchip->base + LOCOMO_GPE);
560
561 spin_unlock_irqrestore(&lchip->lock, flags);
562}
563EXPORT_SYMBOL(locomo_gpio_set_dir);
564
565int locomo_gpio_read_level(struct device *dev, unsigned int bits)
566{
567 struct locomo *lchip = dev_get_drvdata(dev);
568 unsigned long flags;
569 unsigned int ret;
570
571 if (!lchip)
572 return -ENODEV;
573
574 spin_lock_irqsave(&lchip->lock, flags);
575 ret = locomo_readl(lchip->base + LOCOMO_GPL);
576 spin_unlock_irqrestore(&lchip->lock, flags);
577
578 ret &= bits;
579 return ret;
580}
581EXPORT_SYMBOL(locomo_gpio_read_level);
582
583int locomo_gpio_read_output(struct device *dev, unsigned int bits)
584{
585 struct locomo *lchip = dev_get_drvdata(dev);
586 unsigned long flags;
587 unsigned int ret;
588
589 if (!lchip)
590 return -ENODEV;
591
592 spin_lock_irqsave(&lchip->lock, flags);
593 ret = locomo_readl(lchip->base + LOCOMO_GPO);
594 spin_unlock_irqrestore(&lchip->lock, flags);
595
596 ret &= bits;
597 return ret;
598}
599EXPORT_SYMBOL(locomo_gpio_read_output);
600
601void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
602{
603 struct locomo *lchip = dev_get_drvdata(dev);
604 unsigned long flags;
605 unsigned int r;
606
607 if (!lchip)
608 return;
609
610 spin_lock_irqsave(&lchip->lock, flags);
611
612 r = locomo_readl(lchip->base + LOCOMO_GPO);
613 if (set)
614 r |= bits;
615 else
616 r &= ~bits;
617 locomo_writel(r, lchip->base + LOCOMO_GPO);
618
619 spin_unlock_irqrestore(&lchip->lock, flags);
620}
621EXPORT_SYMBOL(locomo_gpio_write);
622
623static void locomo_m62332_sendbit(void *mapbase, int bit)
624{
625 unsigned int r;
626
627 r = locomo_readl(mapbase + LOCOMO_DAC);
628 r &= ~(LOCOMO_DAC_SCLOEB);
629 locomo_writel(r, mapbase + LOCOMO_DAC);
630 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
631 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
632 r = locomo_readl(mapbase + LOCOMO_DAC);
633 r &= ~(LOCOMO_DAC_SCLOEB);
634 locomo_writel(r, mapbase + LOCOMO_DAC);
635 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
636 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
637
638 if (bit & 1) {
639 r = locomo_readl(mapbase + LOCOMO_DAC);
640 r |= LOCOMO_DAC_SDAOEB;
641 locomo_writel(r, mapbase + LOCOMO_DAC);
642 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
643 } else {
644 r = locomo_readl(mapbase + LOCOMO_DAC);
645 r &= ~(LOCOMO_DAC_SDAOEB);
646 locomo_writel(r, mapbase + LOCOMO_DAC);
647 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
648 }
649
650 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
651 r = locomo_readl(mapbase + LOCOMO_DAC);
652 r |= LOCOMO_DAC_SCLOEB;
653 locomo_writel(r, mapbase + LOCOMO_DAC);
654 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
655 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
656}
657
658void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
659{
660 struct locomo *lchip = locomo_chip_driver(ldev);
661 int i;
662 unsigned char data;
663 unsigned int r;
664 void *mapbase = lchip->base;
665 unsigned long flags;
666
667 spin_lock_irqsave(&lchip->lock, flags);
668
669 /* Start */
670 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
671 r = locomo_readl(mapbase + LOCOMO_DAC);
672 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
673 locomo_writel(r, mapbase + LOCOMO_DAC);
674 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
675 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
676 r = locomo_readl(mapbase + LOCOMO_DAC);
677 r &= ~(LOCOMO_DAC_SDAOEB);
678 locomo_writel(r, mapbase + LOCOMO_DAC);
679 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
680 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
681
682 /* Send slave address and W bit (LSB is W bit) */
683 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
684 for (i = 1; i <= 8; i++) {
685 locomo_m62332_sendbit(mapbase, data >> (8 - i));
686 }
687
688 /* Check A bit */
689 r = locomo_readl(mapbase + LOCOMO_DAC);
690 r &= ~(LOCOMO_DAC_SCLOEB);
691 locomo_writel(r, mapbase + LOCOMO_DAC);
692 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
693 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
694 r = locomo_readl(mapbase + LOCOMO_DAC);
695 r &= ~(LOCOMO_DAC_SDAOEB);
696 locomo_writel(r, mapbase + LOCOMO_DAC);
697 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
698 r = locomo_readl(mapbase + LOCOMO_DAC);
699 r |= LOCOMO_DAC_SCLOEB;
700 locomo_writel(r, mapbase + LOCOMO_DAC);
701 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
702 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
703 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
704 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
705 goto out;
706 }
707
708 /* Send Sub address (LSB is channel select) */
709 /* channel = 0 : ch1 select */
710 /* = 1 : ch2 select */
711 data = M62332_SUB_ADDR + channel;
712 for (i = 1; i <= 8; i++) {
713 locomo_m62332_sendbit(mapbase, data >> (8 - i));
714 }
715
716 /* Check A bit */
717 r = locomo_readl(mapbase + LOCOMO_DAC);
718 r &= ~(LOCOMO_DAC_SCLOEB);
719 locomo_writel(r, mapbase + LOCOMO_DAC);
720 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
721 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
722 r = locomo_readl(mapbase + LOCOMO_DAC);
723 r &= ~(LOCOMO_DAC_SDAOEB);
724 locomo_writel(r, mapbase + LOCOMO_DAC);
725 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
726 r = locomo_readl(mapbase + LOCOMO_DAC);
727 r |= LOCOMO_DAC_SCLOEB;
728 locomo_writel(r, mapbase + LOCOMO_DAC);
729 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
730 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
731 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
732 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
733 goto out;
734 }
735
736 /* Send DAC data */
737 for (i = 1; i <= 8; i++) {
738 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
739 }
740
741 /* Check A bit */
742 r = locomo_readl(mapbase + LOCOMO_DAC);
743 r &= ~(LOCOMO_DAC_SCLOEB);
744 locomo_writel(r, mapbase + LOCOMO_DAC);
745 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
746 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
747 r = locomo_readl(mapbase + LOCOMO_DAC);
748 r &= ~(LOCOMO_DAC_SDAOEB);
749 locomo_writel(r, mapbase + LOCOMO_DAC);
750 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
751 r = locomo_readl(mapbase + LOCOMO_DAC);
752 r |= LOCOMO_DAC_SCLOEB;
753 locomo_writel(r, mapbase + LOCOMO_DAC);
754 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
755 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
756 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
757 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
758 }
759
760out:
761 /* stop */
762 r = locomo_readl(mapbase + LOCOMO_DAC);
763 r &= ~(LOCOMO_DAC_SCLOEB);
764 locomo_writel(r, mapbase + LOCOMO_DAC);
765 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
766 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
767 r = locomo_readl(mapbase + LOCOMO_DAC);
768 r |= LOCOMO_DAC_SCLOEB;
769 locomo_writel(r, mapbase + LOCOMO_DAC);
770 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
771 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
772 r = locomo_readl(mapbase + LOCOMO_DAC);
773 r |= LOCOMO_DAC_SDAOEB;
774 locomo_writel(r, mapbase + LOCOMO_DAC);
775 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
776 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
777
778 r = locomo_readl(mapbase + LOCOMO_DAC);
779 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
780 locomo_writel(r, mapbase + LOCOMO_DAC);
781 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
782 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
783
784 spin_unlock_irqrestore(&lchip->lock, flags);
785}
786EXPORT_SYMBOL(locomo_m62332_senddata);
787
788/*
789 * Frontlight control
790 */
791
792void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
793{
794 unsigned long flags;
795 struct locomo *lchip = locomo_chip_driver(dev);
796
797 if (vr)
798 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
799 else
800 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
801
802 spin_lock_irqsave(&lchip->lock, flags);
803 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
804 udelay(100);
805 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
806 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
807 spin_unlock_irqrestore(&lchip->lock, flags);
808}
809EXPORT_SYMBOL(locomo_frontlight_set);
810
811/*
812 * LoCoMo "Register Access Bus."
813 *
814 * We model this as a regular bus type, and hang devices directly
815 * off this.
816 */
817static int locomo_match(struct device *_dev, struct device_driver *_drv)
818{
819 struct locomo_dev *dev = LOCOMO_DEV(_dev);
820 struct locomo_driver *drv = LOCOMO_DRV(_drv);
821
822 return dev->devid == drv->devid;
823}
824
825static int locomo_bus_probe(struct device *dev)
826{
827 struct locomo_dev *ldev = LOCOMO_DEV(dev);
828 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
829 int ret = -ENODEV;
830
831 if (drv->probe)
832 ret = drv->probe(ldev);
833 return ret;
834}
835
836static void locomo_bus_remove(struct device *dev)
837{
838 struct locomo_dev *ldev = LOCOMO_DEV(dev);
839 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
840
841 if (drv->remove)
842 drv->remove(ldev);
843}
844
845struct bus_type locomo_bus_type = {
846 .name = "locomo-bus",
847 .match = locomo_match,
848 .probe = locomo_bus_probe,
849 .remove = locomo_bus_remove,
850};
851
852int locomo_driver_register(struct locomo_driver *driver)
853{
854 driver->drv.bus = &locomo_bus_type;
855 return driver_register(&driver->drv);
856}
857EXPORT_SYMBOL(locomo_driver_register);
858
859void locomo_driver_unregister(struct locomo_driver *driver)
860{
861 driver_unregister(&driver->drv);
862}
863EXPORT_SYMBOL(locomo_driver_unregister);
864
865static int __init locomo_init(void)
866{
867 int ret = bus_register(&locomo_bus_type);
868 if (ret == 0)
869 platform_driver_register(&locomo_device_driver);
870 return ret;
871}
872
873static void __exit locomo_exit(void)
874{
875 platform_driver_unregister(&locomo_device_driver);
876 bus_unregister(&locomo_bus_type);
877}
878
879module_init(locomo_init);
880module_exit(locomo_exit);
881
882MODULE_DESCRIPTION("Sharp LoCoMo core driver");
883MODULE_LICENSE("GPL");
884MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");