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Merge ../linux-2.6
[deliverable/linux.git] / arch / arm / common / locomo.c
CommitLineData
1da177e4
LT		 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/config.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/delay.h>
23#include <linux/errno.h>
24#include <linux/ioport.h>
d052d1be 25#include <linux/platform_device.h>
1da177e4
LT		 26#include <linux/slab.h>
27#include <linux/spinlock.h>
28
29#include <asm/hardware.h>
1da177e4
LT		 30#include <asm/io.h>
31#include <asm/irq.h>
32#include <asm/mach/irq.h>
33
34#include <asm/hardware/locomo.h>
35
36/* M62332 output channel selection */
37#define M62332_EVR_CH 1 /* M62332 volume channel number */
38 /* 0 : CH.1 , 1 : CH. 2 */
39/* DAC send data */
40#define M62332_SLAVE_ADDR 0x4e /* Slave address */
41#define M62332_W_BIT 0x00 /* W bit (0 only) */
42#define M62332_SUB_ADDR 0x00 /* Sub address */
43#define M62332_A_BIT 0x00 /* A bit (0 only) */
44
45/* DAC setup and hold times (expressed in us) */
46#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
47#define DAC_START_SETUP_TIME 5 /* 4.7 us */
48#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
49#define DAC_START_HOLD_TIME 5 /* 4.7 us */
50#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
51#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
52#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
53#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
54#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
55#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
56
57/* the following is the overall data for the locomo chip */
58struct locomo {
59 struct device *dev;
60 unsigned long phys;
61 unsigned int irq;
62 spinlock_t lock;
54815366 63 void __iomem *base;
1da177e4
LT		 64};
65
66struct locomo_dev_info {
67 unsigned long offset;
68 unsigned long length;
69 unsigned int devid;
70 unsigned int irq[1];
71 const char * name;
72};
73
74/* All the locomo devices. If offset is non-zero, the mapbase for the
75 * locomo_dev will be set to the chip base plus offset. If offset is
76 * zero, then the mapbase for the locomo_dev will be set to zero. An
77 * offset of zero means the device only uses GPIOs or other helper
78 * functions inside this file */
79static struct locomo_dev_info locomo_devices[] = {
80 {
81 .devid = LOCOMO_DEVID_KEYBOARD,
82 .irq = {
83 IRQ_LOCOMO_KEY,
84 },
85 .name = "locomo-keyboard",
86 .offset = LOCOMO_KEYBOARD,
87 .length = 16,
88 },
89 {
90 .devid = LOCOMO_DEVID_FRONTLIGHT,
91 .irq = {},
92 .name = "locomo-frontlight",
93 .offset = LOCOMO_FRONTLIGHT,
94 .length = 8,
95
96 },
97 {
98 .devid = LOCOMO_DEVID_BACKLIGHT,
99 .irq = {},
100 .name = "locomo-backlight",
101 .offset = LOCOMO_BACKLIGHT,
102 .length = 8,
103 },
104 {
105 .devid = LOCOMO_DEVID_AUDIO,
106 .irq = {},
107 .name = "locomo-audio",
108 .offset = LOCOMO_AUDIO,
109 .length = 4,
110 },
111 {
112 .devid = LOCOMO_DEVID_LED,
113 .irq = {},
114 .name = "locomo-led",
115 .offset = LOCOMO_LED,
116 .length = 8,
117 },
118 {
119 .devid = LOCOMO_DEVID_UART,
120 .irq = {},
121 .name = "locomo-uart",
122 .offset = 0,
123 .length = 0,
124 },
125};
126
127
128/** LoCoMo interrupt handling stuff.
129 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
130 * that is, there is only one real hardware interrupt
131 * we determine which interrupt it is by reading some IO memory.
132 * We have two levels of expansion, first in the handler for the
133 * hardware interrupt we generate an interrupt
134 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
135 *
136 * hardware irq reads LOCOMO_ICR & 0x0f00
137 * IRQ_LOCOMO_KEY_BASE
138 * IRQ_LOCOMO_GPIO_BASE
139 * IRQ_LOCOMO_LT_BASE
140 * IRQ_LOCOMO_SPI_BASE
141 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
142 * IRQ_LOCOMO_KEY
143 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
144 * IRQ_LOCOMO_GPIO[0-15]
145 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
146 * IRQ_LOCOMO_LT
147 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
148 * IRQ_LOCOMO_SPI_RFR
149 * IRQ_LOCOMO_SPI_RFW
150 * IRQ_LOCOMO_SPI_OVRN
151 * IRQ_LOCOMO_SPI_TEND
152 */
153
154#define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
155#define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
156#define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
157#define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
158#define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
159
160static void locomo_handler(unsigned int irq, struct irqdesc *desc,
161 struct pt_regs *regs)
162{
163 int req, i;
164 struct irqdesc *d;
54815366 165 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 166
167 /* Acknowledge the parent IRQ */
168 desc->chip->ack(irq);
169
170 /* check why this interrupt was generated */
171 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
172
173 if (req) {
174 /* generate the next interrupt(s) */
175 irq = LOCOMO_IRQ_START;
176 d = irq_desc + irq;
177 for (i = 0; i <= 3; i++, d++, irq++) {
178 if (req & (0x0100 << i)) {
664399e1 179 desc_handle_irq(irq, d, regs);
1da177e4
LT		 180 }
181
182 }
183 }
184}
185
186static void locomo_ack_irq(unsigned int irq)
187{
188}
189
190static void locomo_mask_irq(unsigned int irq)
191{
54815366 192 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 193 unsigned int r;
194 r = locomo_readl(mapbase + LOCOMO_ICR);
195 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
196 locomo_writel(r, mapbase + LOCOMO_ICR);
197}
198
199static void locomo_unmask_irq(unsigned int irq)
200{
54815366 201 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 202 unsigned int r;
203 r = locomo_readl(mapbase + LOCOMO_ICR);
204 r |= (0x0010 << (irq - LOCOMO_IRQ_START));
205 locomo_writel(r, mapbase + LOCOMO_ICR);
206}
207
208static struct irqchip locomo_chip = {
209 .ack = locomo_ack_irq,
210 .mask = locomo_mask_irq,
211 .unmask = locomo_unmask_irq,
212};
213
214static void locomo_key_handler(unsigned int irq, struct irqdesc *desc,
215 struct pt_regs *regs)
216{
217 struct irqdesc *d;
54815366 218 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 219
220 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
221 d = irq_desc + LOCOMO_IRQ_KEY_START;
664399e1 222 desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs);
1da177e4
LT		 223 }
224}
225
226static void locomo_key_ack_irq(unsigned int irq)
227{
54815366 228 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 229 unsigned int r;
230 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
231 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
232 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
233}
234
235static void locomo_key_mask_irq(unsigned int irq)
236{
54815366 237 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 238 unsigned int r;
239 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
240 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
241 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
242}
243
244static void locomo_key_unmask_irq(unsigned int irq)
245{
54815366 246 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 247 unsigned int r;
248 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
249 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
250 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
251}
252
253static struct irqchip locomo_key_chip = {
254 .ack = locomo_key_ack_irq,
255 .mask = locomo_key_mask_irq,
256 .unmask = locomo_key_unmask_irq,
257};
258
259static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc,
260 struct pt_regs *regs)
261{
262 int req, i;
263 struct irqdesc *d;
54815366 264 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 265
266 req = locomo_readl(mapbase + LOCOMO_GIR) &
267 locomo_readl(mapbase + LOCOMO_GPD) &
268 0xffff;
269
270 if (req) {
271 irq = LOCOMO_IRQ_GPIO_START;
272 d = irq_desc + LOCOMO_IRQ_GPIO_START;
273 for (i = 0; i <= 15; i++, irq++, d++) {
274 if (req & (0x0001 << i)) {
664399e1 275 desc_handle_irq(irq, d, regs);
1da177e4
LT		 276 }
277 }
278 }
279}
280
281static void locomo_gpio_ack_irq(unsigned int irq)
282{
54815366 283 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 284 unsigned int r;
285 r = locomo_readl(mapbase + LOCOMO_GWE);
286 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
287 locomo_writel(r, mapbase + LOCOMO_GWE);
288
289 r = locomo_readl(mapbase + LOCOMO_GIS);
290 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
291 locomo_writel(r, mapbase + LOCOMO_GIS);
292
293 r = locomo_readl(mapbase + LOCOMO_GWE);
294 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
295 locomo_writel(r, mapbase + LOCOMO_GWE);
296}
297
298static void locomo_gpio_mask_irq(unsigned int irq)
299{
54815366 300 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 301 unsigned int r;
302 r = locomo_readl(mapbase + LOCOMO_GIE);
303 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
304 locomo_writel(r, mapbase + LOCOMO_GIE);
305}
306
307static void locomo_gpio_unmask_irq(unsigned int irq)
308{
54815366 309 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 310 unsigned int r;
311 r = locomo_readl(mapbase + LOCOMO_GIE);
312 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
313 locomo_writel(r, mapbase + LOCOMO_GIE);
314}
315
316static struct irqchip locomo_gpio_chip = {
317 .ack = locomo_gpio_ack_irq,
318 .mask = locomo_gpio_mask_irq,
319 .unmask = locomo_gpio_unmask_irq,
320};
321
322static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc,
323 struct pt_regs *regs)
324{
325 struct irqdesc *d;
54815366 326 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 327
328 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
329 d = irq_desc + LOCOMO_IRQ_LT_START;
664399e1 330 desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs);
1da177e4
LT		 331 }
332}
333
334static void locomo_lt_ack_irq(unsigned int irq)
335{
54815366 336 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 337 unsigned int r;
338 r = locomo_readl(mapbase + LOCOMO_LTINT);
339 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
340 locomo_writel(r, mapbase + LOCOMO_LTINT);
341}
342
343static void locomo_lt_mask_irq(unsigned int irq)
344{
54815366 345 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 346 unsigned int r;
347 r = locomo_readl(mapbase + LOCOMO_LTINT);
348 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
349 locomo_writel(r, mapbase + LOCOMO_LTINT);
350}
351
352static void locomo_lt_unmask_irq(unsigned int irq)
353{
54815366 354 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 355 unsigned int r;
356 r = locomo_readl(mapbase + LOCOMO_LTINT);
357 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
358 locomo_writel(r, mapbase + LOCOMO_LTINT);
359}
360
361static struct irqchip locomo_lt_chip = {
362 .ack = locomo_lt_ack_irq,
363 .mask = locomo_lt_mask_irq,
364 .unmask = locomo_lt_unmask_irq,
365};
366
367static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc,
368 struct pt_regs *regs)
369{
370 int req, i;
371 struct irqdesc *d;
54815366 372 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 373
374 req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F;
375 if (req) {
376 irq = LOCOMO_IRQ_SPI_START;
377 d = irq_desc + irq;
378
379 for (i = 0; i <= 3; i++, irq++, d++) {
380 if (req & (0x0001 << i)) {
664399e1 381 desc_handle_irq(irq, d, regs);
1da177e4
LT		 382 }
383 }
384 }
385}
386
387static void locomo_spi_ack_irq(unsigned int irq)
388{
54815366 389 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 390 unsigned int r;
391 r = locomo_readl(mapbase + LOCOMO_SPIWE);
392 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
393 locomo_writel(r, mapbase + LOCOMO_SPIWE);
394
395 r = locomo_readl(mapbase + LOCOMO_SPIIS);
396 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
397 locomo_writel(r, mapbase + LOCOMO_SPIIS);
398
399 r = locomo_readl(mapbase + LOCOMO_SPIWE);
400 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
401 locomo_writel(r, mapbase + LOCOMO_SPIWE);
402}
403
404static void locomo_spi_mask_irq(unsigned int irq)
405{
54815366 406 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 407 unsigned int r;
408 r = locomo_readl(mapbase + LOCOMO_SPIIE);
409 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
410 locomo_writel(r, mapbase + LOCOMO_SPIIE);
411}
412
413static void locomo_spi_unmask_irq(unsigned int irq)
414{
54815366 415 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 416 unsigned int r;
417 r = locomo_readl(mapbase + LOCOMO_SPIIE);
418 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
419 locomo_writel(r, mapbase + LOCOMO_SPIIE);
420}
421
422static struct irqchip locomo_spi_chip = {
423 .ack = locomo_spi_ack_irq,
424 .mask = locomo_spi_mask_irq,
425 .unmask = locomo_spi_unmask_irq,
426};
427
428static void locomo_setup_irq(struct locomo *lchip)
429{
430 int irq;
54815366 431 void __iomem *irqbase = lchip->base;
1da177e4
LT		 432
433 /*
434 * Install handler for IRQ_LOCOMO_HW.
435 */
436 set_irq_type(lchip->irq, IRQT_FALLING);
437 set_irq_chipdata(lchip->irq, irqbase);
438 set_irq_chained_handler(lchip->irq, locomo_handler);
439
440 /* Install handlers for IRQ_LOCOMO_*_BASE */
441 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
442 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase);
443 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
444 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE);
445
446 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
447 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase);
448 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
449 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE);
450
451 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
452 set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase);
453 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
454 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE);
455
456 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
457 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase);
458 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
459 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE);
460
461 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
462 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
463 set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase);
464 set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ);
465 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
466
467 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
468 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
469 set_irq_chip(irq, &locomo_gpio_chip);
470 set_irq_chipdata(irq, irqbase);
471 set_irq_handler(irq, do_edge_IRQ);
472 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
473 }
474
475 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
476 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
477 set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase);
478 set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ);
479 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
480
481 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
482 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) {
483 set_irq_chip(irq, &locomo_spi_chip);
484 set_irq_chipdata(irq, irqbase);
485 set_irq_handler(irq, do_edge_IRQ);
486 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
487 }
488}
489
490
491static void locomo_dev_release(struct device *_dev)
492{
493 struct locomo_dev *dev = LOCOMO_DEV(_dev);
494
495 kfree(dev);
496}
497
498static int
499locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
500{
501 struct locomo_dev *dev;
502 int ret;
503
d2a02b93 504 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
1da177e4
LT		 505 if (!dev) {
506 ret = -ENOMEM;
507 goto out;
508 }
1da177e4
LT		 509
510 strncpy(dev->dev.bus_id,info->name,sizeof(dev->dev.bus_id));
511 /*
512 * If the parent device has a DMA mask associated with it,
513 * propagate it down to the children.
514 */
515 if (lchip->dev->dma_mask) {
516 dev->dma_mask = *lchip->dev->dma_mask;
517 dev->dev.dma_mask = &dev->dma_mask;
518 }
519
520 dev->devid = info->devid;
521 dev->dev.parent = lchip->dev;
522 dev->dev.bus = &locomo_bus_type;
523 dev->dev.release = locomo_dev_release;
524 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
525
526 if (info->offset)
527 dev->mapbase = lchip->base + info->offset;
528 else
529 dev->mapbase = 0;
530 dev->length = info->length;
531
532 memmove(dev->irq, info->irq, sizeof(dev->irq));
533
534 ret = device_register(&dev->dev);
535 if (ret) {
536 out:
537 kfree(dev);
538 }
539 return ret;
540}
541
b38d950d
JL		 542#ifdef CONFIG_PM
543
544struct locomo_save_data {
545 u16 LCM_GPO;
546 u16 LCM_SPICT;
547 u16 LCM_GPE;
548 u16 LCM_ASD;
549 u16 LCM_SPIMD;
550};
551
3ae5eaec 552static int locomo_suspend(struct platform_device *dev, pm_message_t state)
b38d950d 553{
3ae5eaec 554 struct locomo *lchip = platform_get_drvdata(dev);
b38d950d
JL		 555 struct locomo_save_data *save;
556 unsigned long flags;
557
b38d950d
JL		 558 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
559 if (!save)
560 return -ENOMEM;
561
3ae5eaec 562 dev->dev.power.saved_state = (void *) save;
b38d950d
JL		 563
564 spin_lock_irqsave(&lchip->lock, flags);
565
566 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
567 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
568 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */
569 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
570 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
571 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
572 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
573 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
574 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */
575 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD);
576
577 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
578 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
579 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
580
581 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) )
582 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
583 else
584 /* 18MHz already enabled, so no wait */
585 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
586
587 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
588 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
589 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
590
591 spin_unlock_irqrestore(&lchip->lock, flags);
592
593 return 0;
594}
595
3ae5eaec 596static int locomo_resume(struct platform_device *dev)
b38d950d 597{
3ae5eaec 598 struct locomo *lchip = platform_get_drvdata(dev);
b38d950d
JL		 599 struct locomo_save_data *save;
600 unsigned long r;
601 unsigned long flags;
602
3ae5eaec 603 save = (struct locomo_save_data *) dev->dev.power.saved_state;
b38d950d
JL		 604 if (!save)
605 return 0;
606
607 spin_lock_irqsave(&lchip->lock, flags);
608
609 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
610 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT);
611 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
612 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
613 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD);
614
615 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
616 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
617
618 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
619 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
620 r &= 0xFEFF;
621 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
622 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
623
624 spin_unlock_irqrestore(&lchip->lock, flags);
b38d950d
JL		 625 kfree(save);
626
627 return 0;
628}
629#endif
630
4ebf2d00
PM		 631
632#define LCM_ALC_EN 0x8000
633
634void frontlight_set(struct locomo *lchip, int duty, int vr, int bpwf)
635{
636 unsigned long flags;
637
638 spin_lock_irqsave(&lchip->lock, flags);
639 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
640 udelay(100);
641 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
642 locomo_writel(bpwf | LCM_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
643 spin_unlock_irqrestore(&lchip->lock, flags);
644}
645
646
1da177e4
LT		 647/**
648 * locomo_probe - probe for a single LoCoMo chip.
649 * @phys_addr: physical address of device.
650 *
651 * Probe for a LoCoMo chip. This must be called
652 * before any other locomo-specific code.
653 *
654 * Returns:
655 * %-ENODEV device not found.
656 * %-EBUSY physical address already marked in-use.
657 * %0 successful.
658 */
659static int
660__locomo_probe(struct device *me, struct resource *mem, int irq)
661{
662 struct locomo *lchip;
663 unsigned long r;
664 int i, ret = -ENODEV;
665
d2a02b93 666 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
1da177e4
LT		 667 if (!lchip)
668 return -ENOMEM;
669
1da177e4
LT		 670 spin_lock_init(&lchip->lock);
671
672 lchip->dev = me;
673 dev_set_drvdata(lchip->dev, lchip);
674
675 lchip->phys = mem->start;
676 lchip->irq = irq;
677
678 /*
679 * Map the whole region. This also maps the
680 * registers for our children.
681 */
682 lchip->base = ioremap(mem->start, PAGE_SIZE);
683 if (!lchip->base) {
684 ret = -ENOMEM;
685 goto out;
686 }
687
688 /* locomo initialize */
689 locomo_writel(0, lchip->base + LOCOMO_ICR);
690 /* KEYBOARD */
691 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
692
693 /* GPIO */
694 locomo_writel(0, lchip->base + LOCOMO_GPO);
695 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
696 , lchip->base + LOCOMO_GPE);
697 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
698 , lchip->base + LOCOMO_GPD);
699 locomo_writel(0, lchip->base + LOCOMO_GIE);
700
701 /* FrontLight */
702 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
703 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
4ebf2d00
PM		 704
705 /* Same constants can be used for collie and poodle
706 (depending on CONFIG options in original sharp code)? */
707 frontlight_set(lchip, 163, 0, 148);
708
1da177e4
LT		 709 /* Longtime timer */
710 locomo_writel(0, lchip->base + LOCOMO_LTINT);
711 /* SPI */
712 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
713
714 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
715 r = locomo_readl(lchip->base + LOCOMO_ASD);
716 r |= 0x8000;
717 locomo_writel(r, lchip->base + LOCOMO_ASD);
718
719 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
720 r = locomo_readl(lchip->base + LOCOMO_HSD);
721 r |= 0x8000;
722 locomo_writel(r, lchip->base + LOCOMO_HSD);
723
724 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
725
726 /* XON */
727 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
728 udelay(1000);
729 /* CLK9MEN */
730 r = locomo_readl(lchip->base + LOCOMO_TADC);
731 r |= 0x10;
732 locomo_writel(r, lchip->base + LOCOMO_TADC);
733 udelay(100);
734
735 /* init DAC */
736 r = locomo_readl(lchip->base + LOCOMO_DAC);
737 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
738 locomo_writel(r, lchip->base + LOCOMO_DAC);
739
740 r = locomo_readl(lchip->base + LOCOMO_VER);
741 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
742
743 /*
744 * The interrupt controller must be initialised before any
745 * other device to ensure that the interrupts are available.
746 */
747 if (lchip->irq != NO_IRQ)
748 locomo_setup_irq(lchip);
749
750 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
751 locomo_init_one_child(lchip, &locomo_devices[i]);
752
753 return 0;
754
755 out:
756 kfree(lchip);
757 return ret;
758}
759
e24da5d3 760static int locomo_remove_child(struct device *dev, void *data)
1da177e4 761{
e24da5d3
PM		 762 device_unregister(dev);
763 return 0;
764}
1da177e4 765
e24da5d3
PM		 766static void __locomo_remove(struct locomo *lchip)
767{
768 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
1da177e4
LT		 769
770 if (lchip->irq != NO_IRQ) {
771 set_irq_chained_handler(lchip->irq, NULL);
772 set_irq_data(lchip->irq, NULL);
773 }
774
775 iounmap(lchip->base);
776 kfree(lchip);
777}
778
3ae5eaec 779static int locomo_probe(struct platform_device *dev)
1da177e4 780{
1da177e4
LT		 781 struct resource *mem;
782 int irq;
783
3ae5eaec 784 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
1da177e4
LT		 785 if (!mem)
786 return -EINVAL;
3ae5eaec 787 irq = platform_get_irq(dev, 0);
48944738
DV		 788 if (irq < 0)
789 return -ENXIO;
1da177e4 790
3ae5eaec 791 return __locomo_probe(&dev->dev, mem, irq);
1da177e4
LT		 792}
793
3ae5eaec 794static int locomo_remove(struct platform_device *dev)
1da177e4 795{
c35bf4a5 796 struct locomo *lchip = platform_get_drvdata(dev);
1da177e4
LT		 797
798 if (lchip) {
799 __locomo_remove(lchip);
3ae5eaec 800 platform_set_drvdata(dev, NULL);
1da177e4
LT		 801 }
802
803 return 0;
804}
805
806/*
807 * Not sure if this should be on the system bus or not yet.
808 * We really want some way to register a system device at
809 * the per-machine level, and then have this driver pick
810 * up the registered devices.
811 */
3ae5eaec 812static struct platform_driver locomo_device_driver = {
1da177e4
LT		 813 .probe = locomo_probe,
814 .remove = locomo_remove,
b38d950d
JL		 815#ifdef CONFIG_PM
816 .suspend = locomo_suspend,
817 .resume = locomo_resume,
818#endif
3ae5eaec
RK		 819 .driver = {
820 .name = "locomo",
821 },
1da177e4
LT		 822};
823
824/*
825 * Get the parent device driver (us) structure
826 * from a child function device
827 */
828static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
829{
830 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
831}
832
833void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir)
834{
835 struct locomo *lchip = locomo_chip_driver(ldev);
836 unsigned long flags;
837 unsigned int r;
838
839 spin_lock_irqsave(&lchip->lock, flags);
840
841 r = locomo_readl(lchip->base + LOCOMO_GPD);
842 r &= ~bits;
843 locomo_writel(r, lchip->base + LOCOMO_GPD);
844
845 r = locomo_readl(lchip->base + LOCOMO_GPE);
846 if (dir)
847 r |= bits;
848 else
849 r &= ~bits;
850 locomo_writel(r, lchip->base + LOCOMO_GPE);
851
852 spin_unlock_irqrestore(&lchip->lock, flags);
853}
854
855unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits)
856{
857 struct locomo *lchip = locomo_chip_driver(ldev);
858 unsigned long flags;
859 unsigned int ret;
860
861 spin_lock_irqsave(&lchip->lock, flags);
862 ret = locomo_readl(lchip->base + LOCOMO_GPL);
863 spin_unlock_irqrestore(&lchip->lock, flags);
864
865 ret &= bits;
866 return ret;
867}
868
869unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits)
870{
871 struct locomo *lchip = locomo_chip_driver(ldev);
872 unsigned long flags;
873 unsigned int ret;
874
875 spin_lock_irqsave(&lchip->lock, flags);
876 ret = locomo_readl(lchip->base + LOCOMO_GPO);
877 spin_unlock_irqrestore(&lchip->lock, flags);
878
879 ret &= bits;
880 return ret;
881}
882
883void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set)
884{
885 struct locomo *lchip = locomo_chip_driver(ldev);
886 unsigned long flags;
887 unsigned int r;
888
889 spin_lock_irqsave(&lchip->lock, flags);
890
891 r = locomo_readl(lchip->base + LOCOMO_GPO);
892 if (set)
893 r |= bits;
894 else
895 r &= ~bits;
896 locomo_writel(r, lchip->base + LOCOMO_GPO);
897
898 spin_unlock_irqrestore(&lchip->lock, flags);
899}
900
901static void locomo_m62332_sendbit(void *mapbase, int bit)
902{
903 unsigned int r;
904
905 r = locomo_readl(mapbase + LOCOMO_DAC);
906 r &= ~(LOCOMO_DAC_SCLOEB);
907 locomo_writel(r, mapbase + LOCOMO_DAC);
908 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
909 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
910 r = locomo_readl(mapbase + LOCOMO_DAC);
911 r &= ~(LOCOMO_DAC_SCLOEB);
912 locomo_writel(r, mapbase + LOCOMO_DAC);
913 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
914 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
915
916 if (bit & 1) {
917 r = locomo_readl(mapbase + LOCOMO_DAC);
918 r |= LOCOMO_DAC_SDAOEB;
919 locomo_writel(r, mapbase + LOCOMO_DAC);
920 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
921 } else {
922 r = locomo_readl(mapbase + LOCOMO_DAC);
923 r &= ~(LOCOMO_DAC_SDAOEB);
924 locomo_writel(r, mapbase + LOCOMO_DAC);
925 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
926 }
927
928 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
929 r = locomo_readl(mapbase + LOCOMO_DAC);
930 r |= LOCOMO_DAC_SCLOEB;
931 locomo_writel(r, mapbase + LOCOMO_DAC);
932 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
933 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
934}
935
936void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
937{
938 struct locomo *lchip = locomo_chip_driver(ldev);
939 int i;
940 unsigned char data;
941 unsigned int r;
942 void *mapbase = lchip->base;
943 unsigned long flags;
944
945 spin_lock_irqsave(&lchip->lock, flags);
946
947 /* Start */
948 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
949 r = locomo_readl(mapbase + LOCOMO_DAC);
950 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
951 locomo_writel(r, mapbase + LOCOMO_DAC);
952 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
953 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
954 r = locomo_readl(mapbase + LOCOMO_DAC);
955 r &= ~(LOCOMO_DAC_SDAOEB);
956 locomo_writel(r, mapbase + LOCOMO_DAC);
957 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
958 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
959
960 /* Send slave address and W bit (LSB is W bit) */
961 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
962 for (i = 1; i <= 8; i++) {
963 locomo_m62332_sendbit(mapbase, data >> (8 - i));
964 }
965
966 /* Check A bit */
967 r = locomo_readl(mapbase + LOCOMO_DAC);
968 r &= ~(LOCOMO_DAC_SCLOEB);
969 locomo_writel(r, mapbase + LOCOMO_DAC);
970 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
971 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
972 r = locomo_readl(mapbase + LOCOMO_DAC);
973 r &= ~(LOCOMO_DAC_SDAOEB);
974 locomo_writel(r, mapbase + LOCOMO_DAC);
975 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
976 r = locomo_readl(mapbase + LOCOMO_DAC);
977 r |= LOCOMO_DAC_SCLOEB;
978 locomo_writel(r, mapbase + LOCOMO_DAC);
979 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
980 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
981 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
982 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
983 return;
984 }
985
986 /* Send Sub address (LSB is channel select) */
987 /* channel = 0 : ch1 select */
988 /* = 1 : ch2 select */
989 data = M62332_SUB_ADDR + channel;
990 for (i = 1; i <= 8; i++) {
991 locomo_m62332_sendbit(mapbase, data >> (8 - i));
992 }
993
994 /* Check A bit */
995 r = locomo_readl(mapbase + LOCOMO_DAC);
996 r &= ~(LOCOMO_DAC_SCLOEB);
997 locomo_writel(r, mapbase + LOCOMO_DAC);
998 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
999 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1000 r = locomo_readl(mapbase + LOCOMO_DAC);
1001 r &= ~(LOCOMO_DAC_SDAOEB);
1002 locomo_writel(r, mapbase + LOCOMO_DAC);
1003 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1004 r = locomo_readl(mapbase + LOCOMO_DAC);
1005 r |= LOCOMO_DAC_SCLOEB;
1006 locomo_writel(r, mapbase + LOCOMO_DAC);
1007 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1008 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1009 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1010 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
1011 return;
1012 }
1013
1014 /* Send DAC data */
1015 for (i = 1; i <= 8; i++) {
1016 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1017 }
1018
1019 /* Check A bit */
1020 r = locomo_readl(mapbase + LOCOMO_DAC);
1021 r &= ~(LOCOMO_DAC_SCLOEB);
1022 locomo_writel(r, mapbase + LOCOMO_DAC);
1023 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1024 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1025 r = locomo_readl(mapbase + LOCOMO_DAC);
1026 r &= ~(LOCOMO_DAC_SDAOEB);
1027 locomo_writel(r, mapbase + LOCOMO_DAC);
1028 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1029 r = locomo_readl(mapbase + LOCOMO_DAC);
1030 r |= LOCOMO_DAC_SCLOEB;
1031 locomo_writel(r, mapbase + LOCOMO_DAC);
1032 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1033 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1034 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1035 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1036 return;
1037 }
1038
1039 /* stop */
1040 r = locomo_readl(mapbase + LOCOMO_DAC);
1041 r &= ~(LOCOMO_DAC_SCLOEB);
1042 locomo_writel(r, mapbase + LOCOMO_DAC);
1043 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1044 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1045 r = locomo_readl(mapbase + LOCOMO_DAC);
1046 r |= LOCOMO_DAC_SCLOEB;
1047 locomo_writel(r, mapbase + LOCOMO_DAC);
1048 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1049 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1050 r = locomo_readl(mapbase + LOCOMO_DAC);
1051 r |= LOCOMO_DAC_SDAOEB;
1052 locomo_writel(r, mapbase + LOCOMO_DAC);
1053 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1054 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1055
1056 r = locomo_readl(mapbase + LOCOMO_DAC);
1057 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1058 locomo_writel(r, mapbase + LOCOMO_DAC);
1059 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1060 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1061
1062 spin_unlock_irqrestore(&lchip->lock, flags);
1063}
1064
1065/*
1066 * LoCoMo "Register Access Bus."
1067 *
1068 * We model this as a regular bus type, and hang devices directly
1069 * off this.
1070 */
1071static int locomo_match(struct device *_dev, struct device_driver *_drv)
1072{
1073 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1074 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1075
1076 return dev->devid == drv->devid;
1077}
1078
1079static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1080{
1081 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1082 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1083 int ret = 0;
1084
1085 if (drv && drv->suspend)
1086 ret = drv->suspend(ldev, state);
1087 return ret;
1088}
1089
1090static int locomo_bus_resume(struct device *dev)
1091{
1092 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1093 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1094 int ret = 0;
1095
1096 if (drv && drv->resume)
1097 ret = drv->resume(ldev);
1098 return ret;
1099}
1100
1101static int locomo_bus_probe(struct device *dev)
1102{
1103 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1104 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1105 int ret = -ENODEV;
1106
1107 if (drv->probe)
1108 ret = drv->probe(ldev);
1109 return ret;
1110}
1111
1112static int locomo_bus_remove(struct device *dev)
1113{
1114 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1115 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1116 int ret = 0;
1117
1118 if (drv->remove)
1119 ret = drv->remove(ldev);
1120 return ret;
1121}
1122
1123struct bus_type locomo_bus_type = {
1124 .name = "locomo-bus",
1125 .match = locomo_match,
306955be
RK		 1126 .probe = locomo_bus_probe,
1127 .remove = locomo_bus_remove,
1da177e4
LT		 1128 .suspend = locomo_bus_suspend,
1129 .resume = locomo_bus_resume,
1130};
1131
1132int locomo_driver_register(struct locomo_driver *driver)
1133{
1da177e4
LT		 1134 driver->drv.bus = &locomo_bus_type;
1135 return driver_register(&driver->drv);
1136}
1137
1138void locomo_driver_unregister(struct locomo_driver *driver)
1139{
1140 driver_unregister(&driver->drv);
1141}
1142
1143static int __init locomo_init(void)
1144{
1145 int ret = bus_register(&locomo_bus_type);
1146 if (ret == 0)
3ae5eaec 1147 platform_driver_register(&locomo_device_driver);
1da177e4
LT		 1148 return ret;
1149}
1150
1151static void __exit locomo_exit(void)
1152{
3ae5eaec 1153 platform_driver_unregister(&locomo_device_driver);
1da177e4
LT		 1154 bus_unregister(&locomo_bus_type);
1155}
1156
1157module_init(locomo_init);
1158module_exit(locomo_exit);
1159
1160MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1161MODULE_LICENSE("GPL");
1162MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1163
1164EXPORT_SYMBOL(locomo_driver_register);
1165EXPORT_SYMBOL(locomo_driver_unregister);
1166EXPORT_SYMBOL(locomo_gpio_set_dir);
1167EXPORT_SYMBOL(locomo_gpio_read_level);
1168EXPORT_SYMBOL(locomo_gpio_read_output);
1169EXPORT_SYMBOL(locomo_gpio_write);
1170EXPORT_SYMBOL(locomo_m62332_senddata);
Linux kernel - Deliverables
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