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fs: remove prepare_write/commit_write
[linux-2.6/zen-sources.git] / arch / arm / common / locomo.c
blob7c6b4b99a2df1c98027a6adaee4a87dbe6371554
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 /* M62332 output channel selection */
36 #define M62332_EVR_CH 1 /* M62332 volume channel number */
37 /* 0 : CH.1 , 1 : CH. 2 */
38 /* DAC send data */
39 #define M62332_SLAVE_ADDR 0x4e /* Slave address */
40 #define M62332_W_BIT 0x00 /* W bit (0 only) */
41 #define M62332_SUB_ADDR 0x00 /* Sub address */
42 #define M62332_A_BIT 0x00 /* A bit (0 only) */
43
44 /* DAC setup and hold times (expressed in us) */
45 #define DAC_BUS_FREE_TIME 5 /* 4.7 us */
46 #define DAC_START_SETUP_TIME 5 /* 4.7 us */
47 #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
48 #define DAC_START_HOLD_TIME 5 /* 4.7 us */
49 #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
50 #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
51 #define DAC_DATA_SETUP_TIME 1 /* 250 ns */
52 #define DAC_DATA_HOLD_TIME 1 /* 300 ns */
53 #define DAC_LOW_SETUP_TIME 1 /* 300 ns */
54 #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
55
56 /* the following is the overall data for the locomo chip */
57 struct locomo {
58 struct device *dev;
59 unsigned long phys;
60 unsigned int irq;
61 spinlock_t lock;
62 void __iomem *base;
63 #ifdef CONFIG_PM
64 void *saved_state;
65 #endif
66 };
67
68 struct locomo_dev_info {
69 unsigned long offset;
70 unsigned long length;
71 unsigned int devid;
72 unsigned int irq[1];
73 const char * name;
74 };
75
76 /* All the locomo devices. If offset is non-zero, the mapbase for the
77 * locomo_dev will be set to the chip base plus offset. If offset is
78 * zero, then the mapbase for the locomo_dev will be set to zero. An
79 * offset of zero means the device only uses GPIOs or other helper
80 * functions inside this file */
81 static struct locomo_dev_info locomo_devices[] = {
82 {
83 .devid = LOCOMO_DEVID_KEYBOARD,
84 .irq = {
85 IRQ_LOCOMO_KEY,
86 },
87 .name = "locomo-keyboard",
88 .offset = LOCOMO_KEYBOARD,
89 .length = 16,
90 },
91 {
92 .devid = LOCOMO_DEVID_FRONTLIGHT,
93 .irq = {},
94 .name = "locomo-frontlight",
95 .offset = LOCOMO_FRONTLIGHT,
96 .length = 8,
97
98 },
99 {
100 .devid = LOCOMO_DEVID_BACKLIGHT,
101 .irq = {},
102 .name = "locomo-backlight",
103 .offset = LOCOMO_BACKLIGHT,
104 .length = 8,
105 },
106 {
107 .devid = LOCOMO_DEVID_AUDIO,
108 .irq = {},
109 .name = "locomo-audio",
110 .offset = LOCOMO_AUDIO,
111 .length = 4,
112 },
113 {
114 .devid = LOCOMO_DEVID_LED,
115 .irq = {},
116 .name = "locomo-led",
117 .offset = LOCOMO_LED,
118 .length = 8,
119 },
120 {
121 .devid = LOCOMO_DEVID_UART,
122 .irq = {},
123 .name = "locomo-uart",
124 .offset = 0,
125 .length = 0,
126 },
127 {
128 .devid = LOCOMO_DEVID_SPI,
129 .irq = {},
130 .name = "locomo-spi",
131 .offset = LOCOMO_SPI,
132 .length = 0x30,
133 },
134 };
135
136
137 /** LoCoMo interrupt handling stuff.
138 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
139 * that is, there is only one real hardware interrupt
140 * we determine which interrupt it is by reading some IO memory.
141 * We have two levels of expansion, first in the handler for the
142 * hardware interrupt we generate an interrupt
143 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
144 *
145 * hardware irq reads LOCOMO_ICR & 0x0f00
146 * IRQ_LOCOMO_KEY_BASE
147 * IRQ_LOCOMO_GPIO_BASE
148 * IRQ_LOCOMO_LT_BASE
149 * IRQ_LOCOMO_SPI_BASE
150 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
151 * IRQ_LOCOMO_KEY
152 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
153 * IRQ_LOCOMO_GPIO[0-15]
154 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
155 * IRQ_LOCOMO_LT
156 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
157 * IRQ_LOCOMO_SPI_RFR
158 * IRQ_LOCOMO_SPI_RFW
159 * IRQ_LOCOMO_SPI_OVRN
160 * IRQ_LOCOMO_SPI_TEND
161 */
162
163 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
164 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
165 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
166 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
167 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
168
169 static void locomo_handler(unsigned int irq, struct irq_desc *desc)
170 {
171 int req, i;
172 void __iomem *mapbase = get_irq_chip_data(irq);
173
174 /* Acknowledge the parent IRQ */
175 desc->chip->ack(irq);
176
177 /* check why this interrupt was generated */
178 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
179
180 if (req) {
181 /* generate the next interrupt(s) */
182 irq = LOCOMO_IRQ_START;
183 for (i = 0; i <= 3; i++, irq++) {
184 if (req & (0x0100 << i)) {
185 generic_handle_irq(irq);
186 }
187
188 }
189 }
190 }
191
192 static void locomo_ack_irq(unsigned int irq)
193 {
194 }
195
196 static void locomo_mask_irq(unsigned int irq)
197 {
198 void __iomem *mapbase = get_irq_chip_data(irq);
199 unsigned int r;
200 r = locomo_readl(mapbase + LOCOMO_ICR);
201 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
202 locomo_writel(r, mapbase + LOCOMO_ICR);
203 }
204
205 static void locomo_unmask_irq(unsigned int irq)
206 {
207 void __iomem *mapbase = get_irq_chip_data(irq);
208 unsigned int r;
209 r = locomo_readl(mapbase + LOCOMO_ICR);
210 r |= (0x0010 << (irq - LOCOMO_IRQ_START));
211 locomo_writel(r, mapbase + LOCOMO_ICR);
212 }
213
214 static struct irq_chip locomo_chip = {
215 .name = "LOCOMO",
216 .ack = locomo_ack_irq,
217 .mask = locomo_mask_irq,
218 .unmask = locomo_unmask_irq,
219 };
220
221 static void locomo_key_handler(unsigned int irq, struct irq_desc *desc)
222 {
223 void __iomem *mapbase = get_irq_chip_data(irq);
224
225 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
226 generic_handle_irq(LOCOMO_IRQ_KEY_START);
227 }
228 }
229
230 static void locomo_key_ack_irq(unsigned int irq)
231 {
232 void __iomem *mapbase = get_irq_chip_data(irq);
233 unsigned int r;
234 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
235 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
236 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
237 }
238
239 static void locomo_key_mask_irq(unsigned int irq)
240 {
241 void __iomem *mapbase = get_irq_chip_data(irq);
242 unsigned int r;
243 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
244 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
245 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
246 }
247
248 static void locomo_key_unmask_irq(unsigned int irq)
249 {
250 void __iomem *mapbase = get_irq_chip_data(irq);
251 unsigned int r;
252 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
253 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
254 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
255 }
256
257 static struct irq_chip locomo_key_chip = {
258 .name = "LOCOMO-key",
259 .ack = locomo_key_ack_irq,
260 .mask = locomo_key_mask_irq,
261 .unmask = locomo_key_unmask_irq,
262 };
263
264 static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc)
265 {
266 int req, i;
267 void __iomem *mapbase = get_irq_chip_data(irq);
268
269 req = locomo_readl(mapbase + LOCOMO_GIR) &
270 locomo_readl(mapbase + LOCOMO_GPD) &
271 0xffff;
272
273 if (req) {
274 irq = LOCOMO_IRQ_GPIO_START;
275 for (i = 0; i <= 15; i++, irq++) {
276 if (req & (0x0001 << i)) {
277 generic_handle_irq(irq);
278 }
279 }
280 }
281 }
282
283 static void locomo_gpio_ack_irq(unsigned int irq)
284 {
285 void __iomem *mapbase = get_irq_chip_data(irq);
286 unsigned int r;
287 r = locomo_readl(mapbase + LOCOMO_GWE);
288 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
289 locomo_writel(r, mapbase + LOCOMO_GWE);
290
291 r = locomo_readl(mapbase + LOCOMO_GIS);
292 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
293 locomo_writel(r, mapbase + LOCOMO_GIS);
294
295 r = locomo_readl(mapbase + LOCOMO_GWE);
296 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
297 locomo_writel(r, mapbase + LOCOMO_GWE);
298 }
299
300 static void locomo_gpio_mask_irq(unsigned int irq)
301 {
302 void __iomem *mapbase = get_irq_chip_data(irq);
303 unsigned int r;
304 r = locomo_readl(mapbase + LOCOMO_GIE);
305 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
306 locomo_writel(r, mapbase + LOCOMO_GIE);
307 }
308
309 static void locomo_gpio_unmask_irq(unsigned int irq)
310 {
311 void __iomem *mapbase = get_irq_chip_data(irq);
312 unsigned int r;
313 r = locomo_readl(mapbase + LOCOMO_GIE);
314 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
315 locomo_writel(r, mapbase + LOCOMO_GIE);
316 }
317
318 static int GPIO_IRQ_rising_edge;
319 static int GPIO_IRQ_falling_edge;
320
321 static int locomo_gpio_type(unsigned int irq, unsigned int type)
322 {
323 unsigned int mask;
324 void __iomem *mapbase = get_irq_chip_data(irq);
325
326 mask = 1 << (irq - LOCOMO_IRQ_GPIO_START);
327
328 if (type == IRQ_TYPE_PROBE) {
329 if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask)
330 return 0;
331 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
332 }
333
334 if (type & IRQ_TYPE_EDGE_RISING)
335 GPIO_IRQ_rising_edge |= mask;
336 else
337 GPIO_IRQ_rising_edge &= ~mask;
338 if (type & IRQ_TYPE_EDGE_FALLING)
339 GPIO_IRQ_falling_edge |= mask;
340 else
341 GPIO_IRQ_falling_edge &= ~mask;
342 locomo_writel(GPIO_IRQ_rising_edge, mapbase + LOCOMO_GRIE);
343 locomo_writel(GPIO_IRQ_falling_edge, mapbase + LOCOMO_GFIE);
344
345 return 0;
346 }
347
348 static struct irq_chip locomo_gpio_chip = {
349 .name = "LOCOMO-gpio",
350 .ack = locomo_gpio_ack_irq,
351 .mask = locomo_gpio_mask_irq,
352 .unmask = locomo_gpio_unmask_irq,
353 .set_type = locomo_gpio_type,
354 };
355
356 static void locomo_lt_handler(unsigned int irq, struct irq_desc *desc)
357 {
358 void __iomem *mapbase = get_irq_chip_data(irq);
359
360 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
361 generic_handle_irq(LOCOMO_IRQ_LT_START);
362 }
363 }
364
365 static void locomo_lt_ack_irq(unsigned int irq)
366 {
367 void __iomem *mapbase = get_irq_chip_data(irq);
368 unsigned int r;
369 r = locomo_readl(mapbase + LOCOMO_LTINT);
370 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
371 locomo_writel(r, mapbase + LOCOMO_LTINT);
372 }
373
374 static void locomo_lt_mask_irq(unsigned int irq)
375 {
376 void __iomem *mapbase = get_irq_chip_data(irq);
377 unsigned int r;
378 r = locomo_readl(mapbase + LOCOMO_LTINT);
379 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
380 locomo_writel(r, mapbase + LOCOMO_LTINT);
381 }
382
383 static void locomo_lt_unmask_irq(unsigned int irq)
384 {
385 void __iomem *mapbase = get_irq_chip_data(irq);
386 unsigned int r;
387 r = locomo_readl(mapbase + LOCOMO_LTINT);
388 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
389 locomo_writel(r, mapbase + LOCOMO_LTINT);
390 }
391
392 static struct irq_chip locomo_lt_chip = {
393 .name = "LOCOMO-lt",
394 .ack = locomo_lt_ack_irq,
395 .mask = locomo_lt_mask_irq,
396 .unmask = locomo_lt_unmask_irq,
397 };
398
399 static void locomo_spi_handler(unsigned int irq, struct irq_desc *desc)
400 {
401 int req, i;
402 void __iomem *mapbase = get_irq_chip_data(irq);
403
404 req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F;
405 if (req) {
406 irq = LOCOMO_IRQ_SPI_START;
407
408 for (i = 0; i <= 3; i++, irq++) {
409 if (req & (0x0001 << i)) {
410 generic_handle_irq(irq);
411 }
412 }
413 }
414 }
415
416 static void locomo_spi_ack_irq(unsigned int irq)
417 {
418 void __iomem *mapbase = get_irq_chip_data(irq);
419 unsigned int r;
420 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
421 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
422 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
423
424 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
425 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
426 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
427
428 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
429 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
430 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
431 }
432
433 static void locomo_spi_mask_irq(unsigned int irq)
434 {
435 void __iomem *mapbase = get_irq_chip_data(irq);
436 unsigned int r;
437 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
438 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
439 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
440 }
441
442 static void locomo_spi_unmask_irq(unsigned int irq)
443 {
444 void __iomem *mapbase = get_irq_chip_data(irq);
445 unsigned int r;
446 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
447 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
448 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
449 }
450
451 static struct irq_chip locomo_spi_chip = {
452 .name = "LOCOMO-spi",
453 .ack = locomo_spi_ack_irq,
454 .mask = locomo_spi_mask_irq,
455 .unmask = locomo_spi_unmask_irq,
456 };
457
458 static void locomo_setup_irq(struct locomo *lchip)
459 {
460 int irq;
461 void __iomem *irqbase = lchip->base;
462
463 /*
464 * Install handler for IRQ_LOCOMO_HW.
465 */
466 set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
467 set_irq_chip_data(lchip->irq, irqbase);
468 set_irq_chained_handler(lchip->irq, locomo_handler);
469
470 /* Install handlers for IRQ_LOCOMO_*_BASE */
471 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
472 set_irq_chip_data(IRQ_LOCOMO_KEY_BASE, irqbase);
473 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
474
475 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
476 set_irq_chip_data(IRQ_LOCOMO_GPIO_BASE, irqbase);
477 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
478
479 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
480 set_irq_chip_data(IRQ_LOCOMO_LT_BASE, irqbase);
481 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
482
483 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
484 set_irq_chip_data(IRQ_LOCOMO_SPI_BASE, irqbase);
485 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
486
487 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
488 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
489 set_irq_chip_data(LOCOMO_IRQ_KEY_START, irqbase);
490 set_irq_handler(LOCOMO_IRQ_KEY_START, handle_edge_irq);
491 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
492
493 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
494 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
495 set_irq_chip(irq, &locomo_gpio_chip);
496 set_irq_chip_data(irq, irqbase);
497 set_irq_handler(irq, handle_edge_irq);
498 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
499 }
500
501 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
502 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
503 set_irq_chip_data(LOCOMO_IRQ_LT_START, irqbase);
504 set_irq_handler(LOCOMO_IRQ_LT_START, handle_edge_irq);
505 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
506
507 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
508 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 4; irq++) {
509 set_irq_chip(irq, &locomo_spi_chip);
510 set_irq_chip_data(irq, irqbase);
511 set_irq_handler(irq, handle_edge_irq);
512 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
513 }
514 }
515
516
517 static void locomo_dev_release(struct device *_dev)
518 {
519 struct locomo_dev *dev = LOCOMO_DEV(_dev);
520
521 kfree(dev);
522 }
523
524 static int
525 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
526 {
527 struct locomo_dev *dev;
528 int ret;
529
530 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
531 if (!dev) {
532 ret = -ENOMEM;
533 goto out;
534 }
535
536 /*
537 * If the parent device has a DMA mask associated with it,
538 * propagate it down to the children.
539 */
540 if (lchip->dev->dma_mask) {
541 dev->dma_mask = *lchip->dev->dma_mask;
542 dev->dev.dma_mask = &dev->dma_mask;
543 }
544
545 dev_set_name(&dev->dev, "%s", info->name);
546 dev->devid = info->devid;
547 dev->dev.parent = lchip->dev;
548 dev->dev.bus = &locomo_bus_type;
549 dev->dev.release = locomo_dev_release;
550 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
551
552 if (info->offset)
553 dev->mapbase = lchip->base + info->offset;
554 else
555 dev->mapbase = 0;
556 dev->length = info->length;
557
558 memmove(dev->irq, info->irq, sizeof(dev->irq));
559
560 ret = device_register(&dev->dev);
561 if (ret) {
562 out:
563 kfree(dev);
564 }
565 return ret;
566 }
567
568 #ifdef CONFIG_PM
569
570 struct locomo_save_data {
571 u16 LCM_GPO;
572 u16 LCM_SPICT;
573 u16 LCM_GPE;
574 u16 LCM_ASD;
575 u16 LCM_SPIMD;
576 };
577
578 static int locomo_suspend(struct platform_device *dev, pm_message_t state)
579 {
580 struct locomo *lchip = platform_get_drvdata(dev);
581 struct locomo_save_data *save;
582 unsigned long flags;
583
584 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
585 if (!save)
586 return -ENOMEM;
587
588 lchip->saved_state = save;
589
590 spin_lock_irqsave(&lchip->lock, flags);
591
592 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
593 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
594 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
595 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
596 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
597 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
598 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
599 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
600 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
601 locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
602
603 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
604 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
605 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
606
607 if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
608 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
609 else
610 /* 18MHz already enabled, so no wait */
611 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
612
613 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
614 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
615 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
616
617 spin_unlock_irqrestore(&lchip->lock, flags);
618
619 return 0;
620 }
621
622 static int locomo_resume(struct platform_device *dev)
623 {
624 struct locomo *lchip = platform_get_drvdata(dev);
625 struct locomo_save_data *save;
626 unsigned long r;
627 unsigned long flags;
628
629 save = lchip->saved_state;
630 if (!save)
631 return 0;
632
633 spin_lock_irqsave(&lchip->lock, flags);
634
635 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
636 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
637 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
638 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
639 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
640
641 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
642 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
643
644 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
645 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
646 r &= 0xFEFF;
647 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
648 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
649
650 spin_unlock_irqrestore(&lchip->lock, flags);
651
652 lchip->saved_state = NULL;
653 kfree(save);
654
655 return 0;
656 }
657 #endif
658
659
660 /**
661 * locomo_probe - probe for a single LoCoMo chip.
662 * @phys_addr: physical address of device.
663 *
664 * Probe for a LoCoMo chip. This must be called
665 * before any other locomo-specific code.
666 *
667 * Returns:
668 * %-ENODEV device not found.
669 * %-EBUSY physical address already marked in-use.
670 * %0 successful.
671 */
672 static int
673 __locomo_probe(struct device *me, struct resource *mem, int irq)
674 {
675 struct locomo *lchip;
676 unsigned long r;
677 int i, ret = -ENODEV;
678
679 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
680 if (!lchip)
681 return -ENOMEM;
682
683 spin_lock_init(&lchip->lock);
684
685 lchip->dev = me;
686 dev_set_drvdata(lchip->dev, lchip);
687
688 lchip->phys = mem->start;
689 lchip->irq = irq;
690
691 /*
692 * Map the whole region. This also maps the
693 * registers for our children.
694 */
695 lchip->base = ioremap(mem->start, PAGE_SIZE);
696 if (!lchip->base) {
697 ret = -ENOMEM;
698 goto out;
699 }
700
701 /* locomo initialize */
702 locomo_writel(0, lchip->base + LOCOMO_ICR);
703 /* KEYBOARD */
704 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
705
706 /* GPIO */
707 locomo_writel(0, lchip->base + LOCOMO_GPO);
708 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
709 , lchip->base + LOCOMO_GPE);
710 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
711 , lchip->base + LOCOMO_GPD);
712 locomo_writel(0, lchip->base + LOCOMO_GIE);
713
714 /* Frontlight */
715 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
716 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
717
718 /* Longtime timer */
719 locomo_writel(0, lchip->base + LOCOMO_LTINT);
720 /* SPI */
721 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
722
723 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
724 r = locomo_readl(lchip->base + LOCOMO_ASD);
725 r |= 0x8000;
726 locomo_writel(r, lchip->base + LOCOMO_ASD);
727
728 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
729 r = locomo_readl(lchip->base + LOCOMO_HSD);
730 r |= 0x8000;
731 locomo_writel(r, lchip->base + LOCOMO_HSD);
732
733 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
734
735 /* XON */
736 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
737 udelay(1000);
738 /* CLK9MEN */
739 r = locomo_readl(lchip->base + LOCOMO_TADC);
740 r |= 0x10;
741 locomo_writel(r, lchip->base + LOCOMO_TADC);
742 udelay(100);
743
744 /* init DAC */
745 r = locomo_readl(lchip->base + LOCOMO_DAC);
746 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
747 locomo_writel(r, lchip->base + LOCOMO_DAC);
748
749 r = locomo_readl(lchip->base + LOCOMO_VER);
750 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
751
752 /*
753 * The interrupt controller must be initialised before any
754 * other device to ensure that the interrupts are available.
755 */
756 if (lchip->irq != NO_IRQ)
757 locomo_setup_irq(lchip);
758
759 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
760 locomo_init_one_child(lchip, &locomo_devices[i]);
761 return 0;
762
763 out:
764 kfree(lchip);
765 return ret;
766 }
767
768 static int locomo_remove_child(struct device *dev, void *data)
769 {
770 device_unregister(dev);
771 return 0;
772 }
773
774 static void __locomo_remove(struct locomo *lchip)
775 {
776 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
777
778 if (lchip->irq != NO_IRQ) {
779 set_irq_chained_handler(lchip->irq, NULL);
780 set_irq_data(lchip->irq, NULL);
781 }
782
783 iounmap(lchip->base);
784 kfree(lchip);
785 }
786
787 static int locomo_probe(struct platform_device *dev)
788 {
789 struct resource *mem;
790 int irq;
791
792 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
793 if (!mem)
794 return -EINVAL;
795 irq = platform_get_irq(dev, 0);
796 if (irq < 0)
797 return -ENXIO;
798
799 return __locomo_probe(&dev->dev, mem, irq);
800 }
801
802 static int locomo_remove(struct platform_device *dev)
803 {
804 struct locomo *lchip = platform_get_drvdata(dev);
805
806 if (lchip) {
807 __locomo_remove(lchip);
808 platform_set_drvdata(dev, NULL);
809 }
810
811 return 0;
812 }
813
814 /*
815 * Not sure if this should be on the system bus or not yet.
816 * We really want some way to register a system device at
817 * the per-machine level, and then have this driver pick
818 * up the registered devices.
819 */
820 static struct platform_driver locomo_device_driver = {
821 .probe = locomo_probe,
822 .remove = locomo_remove,
823 #ifdef CONFIG_PM
824 .suspend = locomo_suspend,
825 .resume = locomo_resume,
826 #endif
827 .driver = {
828 .name = "locomo",
829 },
830 };
831
832 /*
833 * Get the parent device driver (us) structure
834 * from a child function device
835 */
836 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
837 {
838 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
839 }
840
841 void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
842 {
843 struct locomo *lchip = dev_get_drvdata(dev);
844 unsigned long flags;
845 unsigned int r;
846
847 if (!lchip)
848 return;
849
850 spin_lock_irqsave(&lchip->lock, flags);
851
852 r = locomo_readl(lchip->base + LOCOMO_GPD);
853 if (dir)
854 r |= bits;
855 else
856 r &= ~bits;
857 locomo_writel(r, lchip->base + LOCOMO_GPD);
858
859 r = locomo_readl(lchip->base + LOCOMO_GPE);
860 if (dir)
861 r |= bits;
862 else
863 r &= ~bits;
864 locomo_writel(r, lchip->base + LOCOMO_GPE);
865
866 spin_unlock_irqrestore(&lchip->lock, flags);
867 }
868
869 int locomo_gpio_read_level(struct device *dev, unsigned int bits)
870 {
871 struct locomo *lchip = dev_get_drvdata(dev);
872 unsigned long flags;
873 unsigned int ret;
874
875 if (!lchip)
876 return -ENODEV;
877
878 spin_lock_irqsave(&lchip->lock, flags);
879 ret = locomo_readl(lchip->base + LOCOMO_GPL);
880 spin_unlock_irqrestore(&lchip->lock, flags);
881
882 ret &= bits;
883 return ret;
884 }
885
886 int locomo_gpio_read_output(struct device *dev, unsigned int bits)
887 {
888 struct locomo *lchip = dev_get_drvdata(dev);
889 unsigned long flags;
890 unsigned int ret;
891
892 if (!lchip)
893 return -ENODEV;
894
895 spin_lock_irqsave(&lchip->lock, flags);
896 ret = locomo_readl(lchip->base + LOCOMO_GPO);
897 spin_unlock_irqrestore(&lchip->lock, flags);
898
899 ret &= bits;
900 return ret;
901 }
902
903 void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
904 {
905 struct locomo *lchip = dev_get_drvdata(dev);
906 unsigned long flags;
907 unsigned int r;
908
909 if (!lchip)
910 return;
911
912 spin_lock_irqsave(&lchip->lock, flags);
913
914 r = locomo_readl(lchip->base + LOCOMO_GPO);
915 if (set)
916 r |= bits;
917 else
918 r &= ~bits;
919 locomo_writel(r, lchip->base + LOCOMO_GPO);
920
921 spin_unlock_irqrestore(&lchip->lock, flags);
922 }
923
924 static void locomo_m62332_sendbit(void *mapbase, int bit)
925 {
926 unsigned int r;
927
928 r = locomo_readl(mapbase + LOCOMO_DAC);
929 r &= ~(LOCOMO_DAC_SCLOEB);
930 locomo_writel(r, mapbase + LOCOMO_DAC);
931 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
932 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
933 r = locomo_readl(mapbase + LOCOMO_DAC);
934 r &= ~(LOCOMO_DAC_SCLOEB);
935 locomo_writel(r, mapbase + LOCOMO_DAC);
936 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
937 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
938
939 if (bit & 1) {
940 r = locomo_readl(mapbase + LOCOMO_DAC);
941 r |= LOCOMO_DAC_SDAOEB;
942 locomo_writel(r, mapbase + LOCOMO_DAC);
943 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
944 } else {
945 r = locomo_readl(mapbase + LOCOMO_DAC);
946 r &= ~(LOCOMO_DAC_SDAOEB);
947 locomo_writel(r, mapbase + LOCOMO_DAC);
948 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
949 }
950
951 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
952 r = locomo_readl(mapbase + LOCOMO_DAC);
953 r |= LOCOMO_DAC_SCLOEB;
954 locomo_writel(r, mapbase + LOCOMO_DAC);
955 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
956 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
957 }
958
959 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
960 {
961 struct locomo *lchip = locomo_chip_driver(ldev);
962 int i;
963 unsigned char data;
964 unsigned int r;
965 void *mapbase = lchip->base;
966 unsigned long flags;
967
968 spin_lock_irqsave(&lchip->lock, flags);
969
970 /* Start */
971 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
972 r = locomo_readl(mapbase + LOCOMO_DAC);
973 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
974 locomo_writel(r, mapbase + LOCOMO_DAC);
975 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
976 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
977 r = locomo_readl(mapbase + LOCOMO_DAC);
978 r &= ~(LOCOMO_DAC_SDAOEB);
979 locomo_writel(r, mapbase + LOCOMO_DAC);
980 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
981 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
982
983 /* Send slave address and W bit (LSB is W bit) */
984 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
985 for (i = 1; i <= 8; i++) {
986 locomo_m62332_sendbit(mapbase, data >> (8 - i));
987 }
988
989 /* Check A bit */
990 r = locomo_readl(mapbase + LOCOMO_DAC);
991 r &= ~(LOCOMO_DAC_SCLOEB);
992 locomo_writel(r, mapbase + LOCOMO_DAC);
993 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
994 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
995 r = locomo_readl(mapbase + LOCOMO_DAC);
996 r &= ~(LOCOMO_DAC_SDAOEB);
997 locomo_writel(r, mapbase + LOCOMO_DAC);
998 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
999 r = locomo_readl(mapbase + LOCOMO_DAC);
1000 r |= LOCOMO_DAC_SCLOEB;
1001 locomo_writel(r, mapbase + LOCOMO_DAC);
1002 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1003 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1004 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1005 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
1006 return;
1007 }
1008
1009 /* Send Sub address (LSB is channel select) */
1010 /* channel = 0 : ch1 select */
1011 /* = 1 : ch2 select */
1012 data = M62332_SUB_ADDR + channel;
1013 for (i = 1; i <= 8; i++) {
1014 locomo_m62332_sendbit(mapbase, data >> (8 - i));
1015 }
1016
1017 /* Check A bit */
1018 r = locomo_readl(mapbase + LOCOMO_DAC);
1019 r &= ~(LOCOMO_DAC_SCLOEB);
1020 locomo_writel(r, mapbase + LOCOMO_DAC);
1021 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1022 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1023 r = locomo_readl(mapbase + LOCOMO_DAC);
1024 r &= ~(LOCOMO_DAC_SDAOEB);
1025 locomo_writel(r, mapbase + LOCOMO_DAC);
1026 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1027 r = locomo_readl(mapbase + LOCOMO_DAC);
1028 r |= LOCOMO_DAC_SCLOEB;
1029 locomo_writel(r, mapbase + LOCOMO_DAC);
1030 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1031 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1032 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1033 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
1034 return;
1035 }
1036
1037 /* Send DAC data */
1038 for (i = 1; i <= 8; i++) {
1039 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1040 }
1041
1042 /* Check A bit */
1043 r = locomo_readl(mapbase + LOCOMO_DAC);
1044 r &= ~(LOCOMO_DAC_SCLOEB);
1045 locomo_writel(r, mapbase + LOCOMO_DAC);
1046 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1047 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1048 r = locomo_readl(mapbase + LOCOMO_DAC);
1049 r &= ~(LOCOMO_DAC_SDAOEB);
1050 locomo_writel(r, mapbase + LOCOMO_DAC);
1051 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1052 r = locomo_readl(mapbase + LOCOMO_DAC);
1053 r |= LOCOMO_DAC_SCLOEB;
1054 locomo_writel(r, mapbase + LOCOMO_DAC);
1055 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1056 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1057 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1058 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1059 return;
1060 }
1061
1062 /* stop */
1063 r = locomo_readl(mapbase + LOCOMO_DAC);
1064 r &= ~(LOCOMO_DAC_SCLOEB);
1065 locomo_writel(r, mapbase + LOCOMO_DAC);
1066 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1067 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1068 r = locomo_readl(mapbase + LOCOMO_DAC);
1069 r |= LOCOMO_DAC_SCLOEB;
1070 locomo_writel(r, mapbase + LOCOMO_DAC);
1071 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1072 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1073 r = locomo_readl(mapbase + LOCOMO_DAC);
1074 r |= LOCOMO_DAC_SDAOEB;
1075 locomo_writel(r, mapbase + LOCOMO_DAC);
1076 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1077 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1078
1079 r = locomo_readl(mapbase + LOCOMO_DAC);
1080 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1081 locomo_writel(r, mapbase + LOCOMO_DAC);
1082 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1083 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1084
1085 spin_unlock_irqrestore(&lchip->lock, flags);
1086 }
1087
1088 /*
1089 * Frontlight control
1090 */
1091
1092 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1093
1094 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1095 {
1096 unsigned long flags;
1097 struct locomo *lchip = locomo_chip_driver(dev);
1098
1099 if (vr)
1100 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
1101 else
1102 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
1103
1104 spin_lock_irqsave(&lchip->lock, flags);
1105 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1106 udelay(100);
1107 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1108 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1109 spin_unlock_irqrestore(&lchip->lock, flags);
1110 }
1111
1112 /*
1113 * LoCoMo "Register Access Bus."
1114 *
1115 * We model this as a regular bus type, and hang devices directly
1116 * off this.
1117 */
1118 static int locomo_match(struct device *_dev, struct device_driver *_drv)
1119 {
1120 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1121 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1122
1123 return dev->devid == drv->devid;
1124 }
1125
1126 static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1127 {
1128 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1129 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1130 int ret = 0;
1131
1132 if (drv && drv->suspend)
1133 ret = drv->suspend(ldev, state);
1134 return ret;
1135 }
1136
1137 static int locomo_bus_resume(struct device *dev)
1138 {
1139 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1140 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1141 int ret = 0;
1142
1143 if (drv && drv->resume)
1144 ret = drv->resume(ldev);
1145 return ret;
1146 }
1147
1148 static int locomo_bus_probe(struct device *dev)
1149 {
1150 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1151 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1152 int ret = -ENODEV;
1153
1154 if (drv->probe)
1155 ret = drv->probe(ldev);
1156 return ret;
1157 }
1158
1159 static int locomo_bus_remove(struct device *dev)
1160 {
1161 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1162 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1163 int ret = 0;
1164
1165 if (drv->remove)
1166 ret = drv->remove(ldev);
1167 return ret;
1168 }
1169
1170 struct bus_type locomo_bus_type = {
1171 .name = "locomo-bus",
1172 .match = locomo_match,
1173 .probe = locomo_bus_probe,
1174 .remove = locomo_bus_remove,
1175 .suspend = locomo_bus_suspend,
1176 .resume = locomo_bus_resume,
1177 };
1178
1179 int locomo_driver_register(struct locomo_driver *driver)
1180 {
1181 driver->drv.bus = &locomo_bus_type;
1182 return driver_register(&driver->drv);
1183 }
1184
1185 void locomo_driver_unregister(struct locomo_driver *driver)
1186 {
1187 driver_unregister(&driver->drv);
1188 }
1189
1190 static int __init locomo_init(void)
1191 {
1192 int ret = bus_register(&locomo_bus_type);
1193 if (ret == 0)
1194 platform_driver_register(&locomo_device_driver);
1195 return ret;
1196 }
1197
1198 static void __exit locomo_exit(void)
1199 {
1200 platform_driver_unregister(&locomo_device_driver);
1201 bus_unregister(&locomo_bus_type);
1202 }
1203
1204 module_init(locomo_init);
1205 module_exit(locomo_exit);
1206
1207 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1208 MODULE_LICENSE("GPL");
1209 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1210
1211 EXPORT_SYMBOL(locomo_driver_register);
1212 EXPORT_SYMBOL(locomo_driver_unregister);
1213 EXPORT_SYMBOL(locomo_gpio_set_dir);
1214 EXPORT_SYMBOL(locomo_gpio_read_level);
1215 EXPORT_SYMBOL(locomo_gpio_read_output);
1216 EXPORT_SYMBOL(locomo_gpio_write);
1217 EXPORT_SYMBOL(locomo_m62332_senddata);
Stable & featurefull patchset based on Linus's git branch