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[PATCH] backlight: LOCOMO Backlight Driver updates
[deliverable/linux.git] / arch / arm / common / locomo.c
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>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/spinlock.h>
28
29 #include <asm/hardware.h>
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 */
58 struct locomo {
59 struct device *dev;
60 unsigned long phys;
61 unsigned int irq;
62 spinlock_t lock;
63 void __iomem *base;
64 };
65
66 struct 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 */
79 static 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
160 static void locomo_handler(unsigned int irq, struct irqdesc *desc,
161 struct pt_regs *regs)
162 {
163 int req, i;
164 struct irqdesc *d;
165 void __iomem *mapbase = get_irq_chipdata(irq);
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)) {
179 desc_handle_irq(irq, d, regs);
180 }
181
182 }
183 }
184 }
185
186 static void locomo_ack_irq(unsigned int irq)
187 {
188 }
189
190 static void locomo_mask_irq(unsigned int irq)
191 {
192 void __iomem *mapbase = get_irq_chipdata(irq);
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
199 static void locomo_unmask_irq(unsigned int irq)
200 {
201 void __iomem *mapbase = get_irq_chipdata(irq);
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
208 static struct irqchip locomo_chip = {
209 .ack = locomo_ack_irq,
210 .mask = locomo_mask_irq,
211 .unmask = locomo_unmask_irq,
212 };
213
214 static void locomo_key_handler(unsigned int irq, struct irqdesc *desc,
215 struct pt_regs *regs)
216 {
217 struct irqdesc *d;
218 void __iomem *mapbase = get_irq_chipdata(irq);
219
220 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
221 d = irq_desc + LOCOMO_IRQ_KEY_START;
222 desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs);
223 }
224 }
225
226 static void locomo_key_ack_irq(unsigned int irq)
227 {
228 void __iomem *mapbase = get_irq_chipdata(irq);
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
235 static void locomo_key_mask_irq(unsigned int irq)
236 {
237 void __iomem *mapbase = get_irq_chipdata(irq);
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
244 static void locomo_key_unmask_irq(unsigned int irq)
245 {
246 void __iomem *mapbase = get_irq_chipdata(irq);
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
253 static 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
259 static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc,
260 struct pt_regs *regs)
261 {
262 int req, i;
263 struct irqdesc *d;
264 void __iomem *mapbase = get_irq_chipdata(irq);
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)) {
275 desc_handle_irq(irq, d, regs);
276 }
277 }
278 }
279 }
280
281 static void locomo_gpio_ack_irq(unsigned int irq)
282 {
283 void __iomem *mapbase = get_irq_chipdata(irq);
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
298 static void locomo_gpio_mask_irq(unsigned int irq)
299 {
300 void __iomem *mapbase = get_irq_chipdata(irq);
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
307 static void locomo_gpio_unmask_irq(unsigned int irq)
308 {
309 void __iomem *mapbase = get_irq_chipdata(irq);
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
316 static 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
322 static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc,
323 struct pt_regs *regs)
324 {
325 struct irqdesc *d;
326 void __iomem *mapbase = get_irq_chipdata(irq);
327
328 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
329 d = irq_desc + LOCOMO_IRQ_LT_START;
330 desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs);
331 }
332 }
333
334 static void locomo_lt_ack_irq(unsigned int irq)
335 {
336 void __iomem *mapbase = get_irq_chipdata(irq);
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
343 static void locomo_lt_mask_irq(unsigned int irq)
344 {
345 void __iomem *mapbase = get_irq_chipdata(irq);
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
352 static void locomo_lt_unmask_irq(unsigned int irq)
353 {
354 void __iomem *mapbase = get_irq_chipdata(irq);
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
361 static 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
367 static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc,
368 struct pt_regs *regs)
369 {
370 int req, i;
371 struct irqdesc *d;
372 void __iomem *mapbase = get_irq_chipdata(irq);
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)) {
381 desc_handle_irq(irq, d, regs);
382 }
383 }
384 }
385 }
386
387 static void locomo_spi_ack_irq(unsigned int irq)
388 {
389 void __iomem *mapbase = get_irq_chipdata(irq);
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
404 static void locomo_spi_mask_irq(unsigned int irq)
405 {
406 void __iomem *mapbase = get_irq_chipdata(irq);
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
413 static void locomo_spi_unmask_irq(unsigned int irq)
414 {
415 void __iomem *mapbase = get_irq_chipdata(irq);
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
422 static 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
428 static void locomo_setup_irq(struct locomo *lchip)
429 {
430 int irq;
431 void __iomem *irqbase = lchip->base;
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
491 static void locomo_dev_release(struct device *_dev)
492 {
493 struct locomo_dev *dev = LOCOMO_DEV(_dev);
494
495 kfree(dev);
496 }
497
498 static int
499 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
500 {
501 struct locomo_dev *dev;
502 int ret;
503
504 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
505 if (!dev) {
506 ret = -ENOMEM;
507 goto out;
508 }
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
542 #ifdef CONFIG_PM
543
544 struct 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
552 static int locomo_suspend(struct platform_device *dev, pm_message_t state)
553 {
554 struct locomo *lchip = platform_get_drvdata(dev);
555 struct locomo_save_data *save;
556 unsigned long flags;
557
558 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
559 if (!save)
560 return -ENOMEM;
561
562 dev->dev.power.saved_state = (void *) save;
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
596 static int locomo_resume(struct platform_device *dev)
597 {
598 struct locomo *lchip = platform_get_drvdata(dev);
599 struct locomo_save_data *save;
600 unsigned long r;
601 unsigned long flags;
602
603 save = (struct locomo_save_data *) dev->dev.power.saved_state;
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);
625 kfree(save);
626
627 return 0;
628 }
629 #endif
630
631
632 /**
633 * locomo_probe - probe for a single LoCoMo chip.
634 * @phys_addr: physical address of device.
635 *
636 * Probe for a LoCoMo chip. This must be called
637 * before any other locomo-specific code.
638 *
639 * Returns:
640 * %-ENODEV device not found.
641 * %-EBUSY physical address already marked in-use.
642 * %0 successful.
643 */
644 static int
645 __locomo_probe(struct device *me, struct resource *mem, int irq)
646 {
647 struct locomo *lchip;
648 unsigned long r;
649 int i, ret = -ENODEV;
650
651 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
652 if (!lchip)
653 return -ENOMEM;
654
655 spin_lock_init(&lchip->lock);
656
657 lchip->dev = me;
658 dev_set_drvdata(lchip->dev, lchip);
659
660 lchip->phys = mem->start;
661 lchip->irq = irq;
662
663 /*
664 * Map the whole region. This also maps the
665 * registers for our children.
666 */
667 lchip->base = ioremap(mem->start, PAGE_SIZE);
668 if (!lchip->base) {
669 ret = -ENOMEM;
670 goto out;
671 }
672
673 /* locomo initialize */
674 locomo_writel(0, lchip->base + LOCOMO_ICR);
675 /* KEYBOARD */
676 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
677
678 /* GPIO */
679 locomo_writel(0, lchip->base + LOCOMO_GPO);
680 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
681 , lchip->base + LOCOMO_GPE);
682 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
683 , lchip->base + LOCOMO_GPD);
684 locomo_writel(0, lchip->base + LOCOMO_GIE);
685
686 /* Frontlight */
687 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
688 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
689
690 /* Longtime timer */
691 locomo_writel(0, lchip->base + LOCOMO_LTINT);
692 /* SPI */
693 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
694
695 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
696 r = locomo_readl(lchip->base + LOCOMO_ASD);
697 r |= 0x8000;
698 locomo_writel(r, lchip->base + LOCOMO_ASD);
699
700 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
701 r = locomo_readl(lchip->base + LOCOMO_HSD);
702 r |= 0x8000;
703 locomo_writel(r, lchip->base + LOCOMO_HSD);
704
705 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
706
707 /* XON */
708 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
709 udelay(1000);
710 /* CLK9MEN */
711 r = locomo_readl(lchip->base + LOCOMO_TADC);
712 r |= 0x10;
713 locomo_writel(r, lchip->base + LOCOMO_TADC);
714 udelay(100);
715
716 /* init DAC */
717 r = locomo_readl(lchip->base + LOCOMO_DAC);
718 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
719 locomo_writel(r, lchip->base + LOCOMO_DAC);
720
721 r = locomo_readl(lchip->base + LOCOMO_VER);
722 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
723
724 /*
725 * The interrupt controller must be initialised before any
726 * other device to ensure that the interrupts are available.
727 */
728 if (lchip->irq != NO_IRQ)
729 locomo_setup_irq(lchip);
730
731 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
732 locomo_init_one_child(lchip, &locomo_devices[i]);
733
734 return 0;
735
736 out:
737 kfree(lchip);
738 return ret;
739 }
740
741 static int locomo_remove_child(struct device *dev, void *data)
742 {
743 device_unregister(dev);
744 return 0;
745 }
746
747 static void __locomo_remove(struct locomo *lchip)
748 {
749 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
750
751 if (lchip->irq != NO_IRQ) {
752 set_irq_chained_handler(lchip->irq, NULL);
753 set_irq_data(lchip->irq, NULL);
754 }
755
756 iounmap(lchip->base);
757 kfree(lchip);
758 }
759
760 static int locomo_probe(struct platform_device *dev)
761 {
762 struct resource *mem;
763 int irq;
764
765 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
766 if (!mem)
767 return -EINVAL;
768 irq = platform_get_irq(dev, 0);
769 if (irq < 0)
770 return -ENXIO;
771
772 return __locomo_probe(&dev->dev, mem, irq);
773 }
774
775 static int locomo_remove(struct platform_device *dev)
776 {
777 struct locomo *lchip = platform_get_drvdata(dev);
778
779 if (lchip) {
780 __locomo_remove(lchip);
781 platform_set_drvdata(dev, NULL);
782 }
783
784 return 0;
785 }
786
787 /*
788 * Not sure if this should be on the system bus or not yet.
789 * We really want some way to register a system device at
790 * the per-machine level, and then have this driver pick
791 * up the registered devices.
792 */
793 static struct platform_driver locomo_device_driver = {
794 .probe = locomo_probe,
795 .remove = locomo_remove,
796 #ifdef CONFIG_PM
797 .suspend = locomo_suspend,
798 .resume = locomo_resume,
799 #endif
800 .driver = {
801 .name = "locomo",
802 },
803 };
804
805 /*
806 * Get the parent device driver (us) structure
807 * from a child function device
808 */
809 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
810 {
811 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
812 }
813
814 void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir)
815 {
816 struct locomo *lchip = locomo_chip_driver(ldev);
817 unsigned long flags;
818 unsigned int r;
819
820 spin_lock_irqsave(&lchip->lock, flags);
821
822 r = locomo_readl(lchip->base + LOCOMO_GPD);
823 r &= ~bits;
824 locomo_writel(r, lchip->base + LOCOMO_GPD);
825
826 r = locomo_readl(lchip->base + LOCOMO_GPE);
827 if (dir)
828 r |= bits;
829 else
830 r &= ~bits;
831 locomo_writel(r, lchip->base + LOCOMO_GPE);
832
833 spin_unlock_irqrestore(&lchip->lock, flags);
834 }
835
836 unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits)
837 {
838 struct locomo *lchip = locomo_chip_driver(ldev);
839 unsigned long flags;
840 unsigned int ret;
841
842 spin_lock_irqsave(&lchip->lock, flags);
843 ret = locomo_readl(lchip->base + LOCOMO_GPL);
844 spin_unlock_irqrestore(&lchip->lock, flags);
845
846 ret &= bits;
847 return ret;
848 }
849
850 unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits)
851 {
852 struct locomo *lchip = locomo_chip_driver(ldev);
853 unsigned long flags;
854 unsigned int ret;
855
856 spin_lock_irqsave(&lchip->lock, flags);
857 ret = locomo_readl(lchip->base + LOCOMO_GPO);
858 spin_unlock_irqrestore(&lchip->lock, flags);
859
860 ret &= bits;
861 return ret;
862 }
863
864 void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set)
865 {
866 struct locomo *lchip = locomo_chip_driver(ldev);
867 unsigned long flags;
868 unsigned int r;
869
870 spin_lock_irqsave(&lchip->lock, flags);
871
872 r = locomo_readl(lchip->base + LOCOMO_GPO);
873 if (set)
874 r |= bits;
875 else
876 r &= ~bits;
877 locomo_writel(r, lchip->base + LOCOMO_GPO);
878
879 spin_unlock_irqrestore(&lchip->lock, flags);
880 }
881
882 static void locomo_m62332_sendbit(void *mapbase, int bit)
883 {
884 unsigned int r;
885
886 r = locomo_readl(mapbase + LOCOMO_DAC);
887 r &= ~(LOCOMO_DAC_SCLOEB);
888 locomo_writel(r, mapbase + LOCOMO_DAC);
889 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
890 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
891 r = locomo_readl(mapbase + LOCOMO_DAC);
892 r &= ~(LOCOMO_DAC_SCLOEB);
893 locomo_writel(r, mapbase + LOCOMO_DAC);
894 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
895 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
896
897 if (bit & 1) {
898 r = locomo_readl(mapbase + LOCOMO_DAC);
899 r |= LOCOMO_DAC_SDAOEB;
900 locomo_writel(r, mapbase + LOCOMO_DAC);
901 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
902 } else {
903 r = locomo_readl(mapbase + LOCOMO_DAC);
904 r &= ~(LOCOMO_DAC_SDAOEB);
905 locomo_writel(r, mapbase + LOCOMO_DAC);
906 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
907 }
908
909 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
910 r = locomo_readl(mapbase + LOCOMO_DAC);
911 r |= LOCOMO_DAC_SCLOEB;
912 locomo_writel(r, mapbase + LOCOMO_DAC);
913 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
914 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
915 }
916
917 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
918 {
919 struct locomo *lchip = locomo_chip_driver(ldev);
920 int i;
921 unsigned char data;
922 unsigned int r;
923 void *mapbase = lchip->base;
924 unsigned long flags;
925
926 spin_lock_irqsave(&lchip->lock, flags);
927
928 /* Start */
929 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
930 r = locomo_readl(mapbase + LOCOMO_DAC);
931 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
932 locomo_writel(r, mapbase + LOCOMO_DAC);
933 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
934 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
935 r = locomo_readl(mapbase + LOCOMO_DAC);
936 r &= ~(LOCOMO_DAC_SDAOEB);
937 locomo_writel(r, mapbase + LOCOMO_DAC);
938 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
939 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
940
941 /* Send slave address and W bit (LSB is W bit) */
942 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
943 for (i = 1; i <= 8; i++) {
944 locomo_m62332_sendbit(mapbase, data >> (8 - i));
945 }
946
947 /* Check A bit */
948 r = locomo_readl(mapbase + LOCOMO_DAC);
949 r &= ~(LOCOMO_DAC_SCLOEB);
950 locomo_writel(r, mapbase + LOCOMO_DAC);
951 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
952 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
953 r = locomo_readl(mapbase + LOCOMO_DAC);
954 r &= ~(LOCOMO_DAC_SDAOEB);
955 locomo_writel(r, mapbase + LOCOMO_DAC);
956 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
957 r = locomo_readl(mapbase + LOCOMO_DAC);
958 r |= LOCOMO_DAC_SCLOEB;
959 locomo_writel(r, mapbase + LOCOMO_DAC);
960 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
961 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
962 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
963 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
964 return;
965 }
966
967 /* Send Sub address (LSB is channel select) */
968 /* channel = 0 : ch1 select */
969 /* = 1 : ch2 select */
970 data = M62332_SUB_ADDR + channel;
971 for (i = 1; i <= 8; i++) {
972 locomo_m62332_sendbit(mapbase, data >> (8 - i));
973 }
974
975 /* Check A bit */
976 r = locomo_readl(mapbase + LOCOMO_DAC);
977 r &= ~(LOCOMO_DAC_SCLOEB);
978 locomo_writel(r, mapbase + LOCOMO_DAC);
979 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
980 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
981 r = locomo_readl(mapbase + LOCOMO_DAC);
982 r &= ~(LOCOMO_DAC_SDAOEB);
983 locomo_writel(r, mapbase + LOCOMO_DAC);
984 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
985 r = locomo_readl(mapbase + LOCOMO_DAC);
986 r |= LOCOMO_DAC_SCLOEB;
987 locomo_writel(r, mapbase + LOCOMO_DAC);
988 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
989 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
990 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
991 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
992 return;
993 }
994
995 /* Send DAC data */
996 for (i = 1; i <= 8; i++) {
997 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
998 }
999
1000 /* Check A bit */
1001 r = locomo_readl(mapbase + LOCOMO_DAC);
1002 r &= ~(LOCOMO_DAC_SCLOEB);
1003 locomo_writel(r, mapbase + LOCOMO_DAC);
1004 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1005 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1006 r = locomo_readl(mapbase + LOCOMO_DAC);
1007 r &= ~(LOCOMO_DAC_SDAOEB);
1008 locomo_writel(r, mapbase + LOCOMO_DAC);
1009 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1010 r = locomo_readl(mapbase + LOCOMO_DAC);
1011 r |= LOCOMO_DAC_SCLOEB;
1012 locomo_writel(r, mapbase + LOCOMO_DAC);
1013 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1014 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1015 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1016 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1017 return;
1018 }
1019
1020 /* stop */
1021 r = locomo_readl(mapbase + LOCOMO_DAC);
1022 r &= ~(LOCOMO_DAC_SCLOEB);
1023 locomo_writel(r, mapbase + LOCOMO_DAC);
1024 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1025 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1026 r = locomo_readl(mapbase + LOCOMO_DAC);
1027 r |= LOCOMO_DAC_SCLOEB;
1028 locomo_writel(r, mapbase + LOCOMO_DAC);
1029 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1030 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1031 r = locomo_readl(mapbase + LOCOMO_DAC);
1032 r |= LOCOMO_DAC_SDAOEB;
1033 locomo_writel(r, mapbase + LOCOMO_DAC);
1034 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1035 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1036
1037 r = locomo_readl(mapbase + LOCOMO_DAC);
1038 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1039 locomo_writel(r, mapbase + LOCOMO_DAC);
1040 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1041 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1042
1043 spin_unlock_irqrestore(&lchip->lock, flags);
1044 }
1045
1046 /*
1047 * Frontlight control
1048 */
1049
1050 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1051
1052 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1053 {
1054 unsigned long flags;
1055 struct locomo *lchip = locomo_chip_driver(dev);
1056
1057 if (vr)
1058 locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 1);
1059 else
1060 locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 0);
1061
1062 spin_lock_irqsave(&lchip->lock, flags);
1063 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1064 udelay(100);
1065 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1066 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1067 spin_unlock_irqrestore(&lchip->lock, flags);
1068 }
1069
1070 /*
1071 * LoCoMo "Register Access Bus."
1072 *
1073 * We model this as a regular bus type, and hang devices directly
1074 * off this.
1075 */
1076 static int locomo_match(struct device *_dev, struct device_driver *_drv)
1077 {
1078 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1079 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1080
1081 return dev->devid == drv->devid;
1082 }
1083
1084 static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1085 {
1086 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1087 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1088 int ret = 0;
1089
1090 if (drv && drv->suspend)
1091 ret = drv->suspend(ldev, state);
1092 return ret;
1093 }
1094
1095 static int locomo_bus_resume(struct device *dev)
1096 {
1097 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1098 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1099 int ret = 0;
1100
1101 if (drv && drv->resume)
1102 ret = drv->resume(ldev);
1103 return ret;
1104 }
1105
1106 static int locomo_bus_probe(struct device *dev)
1107 {
1108 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1109 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1110 int ret = -ENODEV;
1111
1112 if (drv->probe)
1113 ret = drv->probe(ldev);
1114 return ret;
1115 }
1116
1117 static int locomo_bus_remove(struct device *dev)
1118 {
1119 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1120 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1121 int ret = 0;
1122
1123 if (drv->remove)
1124 ret = drv->remove(ldev);
1125 return ret;
1126 }
1127
1128 struct bus_type locomo_bus_type = {
1129 .name = "locomo-bus",
1130 .match = locomo_match,
1131 .probe = locomo_bus_probe,
1132 .remove = locomo_bus_remove,
1133 .suspend = locomo_bus_suspend,
1134 .resume = locomo_bus_resume,
1135 };
1136
1137 int locomo_driver_register(struct locomo_driver *driver)
1138 {
1139 driver->drv.bus = &locomo_bus_type;
1140 return driver_register(&driver->drv);
1141 }
1142
1143 void locomo_driver_unregister(struct locomo_driver *driver)
1144 {
1145 driver_unregister(&driver->drv);
1146 }
1147
1148 static int __init locomo_init(void)
1149 {
1150 int ret = bus_register(&locomo_bus_type);
1151 if (ret == 0)
1152 platform_driver_register(&locomo_device_driver);
1153 return ret;
1154 }
1155
1156 static void __exit locomo_exit(void)
1157 {
1158 platform_driver_unregister(&locomo_device_driver);
1159 bus_unregister(&locomo_bus_type);
1160 }
1161
1162 module_init(locomo_init);
1163 module_exit(locomo_exit);
1164
1165 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1166 MODULE_LICENSE("GPL");
1167 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1168
1169 EXPORT_SYMBOL(locomo_driver_register);
1170 EXPORT_SYMBOL(locomo_driver_unregister);
1171 EXPORT_SYMBOL(locomo_gpio_set_dir);
1172 EXPORT_SYMBOL(locomo_gpio_read_level);
1173 EXPORT_SYMBOL(locomo_gpio_read_output);
1174 EXPORT_SYMBOL(locomo_gpio_write);
1175 EXPORT_SYMBOL(locomo_m62332_senddata);
Linux kernel - Deliverables
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